Merge branch 'master' into cmakepresets-schema

47 files changed, 753 insertions, 4066 deletions

diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 1194318..cb954e5 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -441,6 +441,8 @@ set(SRCS
   cmTest.h
   cmTestGenerator.cxx
   cmTestGenerator.h
+  cmTransformDepfile.cxx
+  cmTransformDepfile.h
   cmUuid.cxx
   cmUVHandlePtr.cxx
   cmUVHandlePtr.h
@@ -1156,20 +1158,6 @@ add_executable(cmake cmakemain.cxx cmcmd.cxx cmcmd.h ${MANIFEST_FILE})
 list(APPEND _tools cmake)
 target_link_libraries(cmake CMakeLib)
 
-add_library(CMakeServerLib
-  cmConnection.h cmConnection.cxx
-  cmFileMonitor.cxx cmFileMonitor.h
-  cmJsonObjectDictionary.h
-  cmJsonObjects.h
-  cmJsonObjects.cxx
-  cmPipeConnection.cxx cmPipeConnection.h
-  cmServer.cxx cmServer.h
-  cmServerConnection.cxx cmServerConnection.h
-  cmServerProtocol.cxx cmServerProtocol.h
-  )
-target_link_libraries(CMakeServerLib CMakeLib)
-target_link_libraries(cmake CMakeServerLib)
-
 # Build CTest executable
 add_executable(ctest ctest.cxx ${MANIFEST_FILE})
 list(APPEND _tools ctest)
diff --git a/Source/CMakeVersion.cmake b/Source/CMakeVersion.cmake
index 30b9512..41c84af 100644
--- a/Source/CMakeVersion.cmake
+++ b/Source/CMakeVersion.cmake
@@ -1,8 +1,8 @@
 # CMake version number components.
 set(CMake_VERSION_MAJOR 3)
 set(CMake_VERSION_MINOR 19)
-set(CMake_VERSION_PATCH 0)
-set(CMake_VERSION_RC 1)
+set(CMake_VERSION_PATCH 20201020)
+#set(CMake_VERSION_RC 0)
 set(CMake_VERSION_IS_DIRTY 0)
 
 # Start with the full version number used in tags.  It has no dev info.
diff --git a/Source/LexerParser/cmGccDepfileLexer.cxx b/Source/LexerParser/cmGccDepfileLexer.cxx
index a98969d..3630f4e 100644
--- a/Source/LexerParser/cmGccDepfileLexer.cxx
+++ b/Source/LexerParser/cmGccDepfileLexer.cxx
@@ -994,7 +994,7 @@ case 5:
 YY_RULE_SETUP
 {
                          // A line continuation ends the current file name.
-                         yyextra->newDependency();
+                         yyextra->newRuleOrDependency();
                        }
 	YY_BREAK
 case 6:
diff --git a/Source/LexerParser/cmGccDepfileLexer.in.l b/Source/LexerParser/cmGccDepfileLexer.in.l
index 08f8577..c83cb75 100644
--- a/Source/LexerParser/cmGccDepfileLexer.in.l
+++ b/Source/LexerParser/cmGccDepfileLexer.in.l
@@ -42,7 +42,7 @@ NEWLINE \r?\n
                        }
 {WSPACE}*\\{NEWLINE}   {
                          // A line continuation ends the current file name.
-                         yyextra->newDependency();
+                         yyextra->newRuleOrDependency();
                        }
 {NEWLINE}              {
                          // A newline ends the current file name and the current rule.
diff --git a/Source/cmAddCustomCommandCommand.cxx b/Source/cmAddCustomCommandCommand.cxx
index 231a2d6..bea89c0 100644
--- a/Source/cmAddCustomCommandCommand.cxx
+++ b/Source/cmAddCustomCommandCommand.cxx
@@ -314,16 +314,9 @@ bool cmAddCustomCommandCommand(std::vector<std::string> const& args,
 
   // Check for an append request.
   if (append) {
-    if (mf.AppendCustomCommandToOutput(output[0], depends, implicit_depends,
-                                       commandLines)) {
-      return true;
-    }
-
-    // No command for this output exists.
-    status.SetError(
-      cmStrCat("given APPEND option with output\n  ", output[0],
-               "\nwhich is not already a custom command output."));
-    return false;
+    mf.AppendCustomCommandToOutput(output[0], depends, implicit_depends,
+                                   commandLines);
+    return true;
   }
 
   if (uses_terminal && !job_pool.empty()) {
diff --git a/Source/cmConnection.cxx b/Source/cmConnection.cxx
deleted file mode 100644
index e4d0cf1..0000000
--- a/Source/cmConnection.cxx
+++ /dev/null
@@ -1,173 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmConnection.h"
-
-#include <cassert>
-#include <cstring>
-
-#include <cm3p/uv.h>
-
-#include "cmServer.h"
-
-struct write_req_t
-{
-  uv_write_t req;
-  uv_buf_t buf;
-};
-
-void cmEventBasedConnection::on_alloc_buffer(uv_handle_t* handle,
-                                             size_t suggested_size,
-                                             uv_buf_t* buf)
-{
-  (void)(handle);
-#ifndef __clang_analyzer__
-  char* rawBuffer = new char[suggested_size];
-  *buf = uv_buf_init(rawBuffer, static_cast<unsigned int>(suggested_size));
-#else
-  (void)(suggested_size);
-  (void)(buf);
-#endif /* __clang_analyzer__ */
-}
-
-void cmEventBasedConnection::on_read(uv_stream_t* stream, ssize_t nread,
-                                     const uv_buf_t* buf)
-{
-  auto conn = static_cast<cmEventBasedConnection*>(stream->data);
-  if (conn) {
-    if (nread >= 0) {
-      conn->ReadData(std::string(buf->base, buf->base + nread));
-    } else {
-      conn->OnDisconnect(static_cast<int>(nread));
-    }
-  }
-
-  delete[](buf->base);
-}
-
-void cmEventBasedConnection::on_close(uv_handle_t* /*handle*/)
-{
-}
-
-void cmEventBasedConnection::on_write(uv_write_t* req, int status)
-{
-  (void)(status);
-
-  // Free req and buffer
-  write_req_t* wr = reinterpret_cast<write_req_t*>(req);
-  delete[](wr->buf.base);
-  delete wr;
-}
-
-void cmEventBasedConnection::on_new_connection(uv_stream_t* stream, int status)
-{
-  (void)(status);
-  auto conn = static_cast<cmEventBasedConnection*>(stream->data);
-
-  if (conn) {
-    conn->Connect(stream);
-  }
-}
-
-bool cmEventBasedConnection::IsOpen() const
-{
-  return this->WriteStream != nullptr;
-}
-
-void cmEventBasedConnection::WriteData(const std::string& _data)
-{
-#ifndef NDEBUG
-  auto curr_thread_id = uv_thread_self();
-  assert(this->Server);
-  assert(uv_thread_equal(&curr_thread_id, &this->Server->ServeThreadId));
-#endif
-
-#ifndef __clang_analyzer__
-  auto data = _data;
-  assert(this->WriteStream.get());
-  if (BufferStrategy) {
-    data = BufferStrategy->BufferOutMessage(data);
-  }
-
-  auto ds = data.size();
-
-  write_req_t* req = new write_req_t;
-  req->req.data = this;
-  req->buf = uv_buf_init(new char[ds], static_cast<unsigned int>(ds));
-  memcpy(req->buf.base, data.c_str(), ds);
-  uv_write(reinterpret_cast<uv_write_t*>(req), this->WriteStream, &req->buf, 1,
-           on_write);
-#else
-  (void)(_data);
-#endif /* __clang_analyzer__ */
-}
-
-void cmEventBasedConnection::ReadData(const std::string& data)
-{
-  this->RawReadBuffer += data;
-  if (BufferStrategy) {
-    std::string packet = BufferStrategy->BufferMessage(this->RawReadBuffer);
-    while (!packet.empty()) {
-      ProcessRequest(packet);
-      packet = BufferStrategy->BufferMessage(this->RawReadBuffer);
-    }
-  } else {
-    ProcessRequest(this->RawReadBuffer);
-    this->RawReadBuffer.clear();
-  }
-}
-
-cmEventBasedConnection::cmEventBasedConnection(
-  cmConnectionBufferStrategy* bufferStrategy)
-  : BufferStrategy(bufferStrategy)
-{
-}
-
-void cmEventBasedConnection::Connect(uv_stream_t* server)
-{
-  (void)server;
-  Server->OnConnected(nullptr);
-}
-
-void cmEventBasedConnection::OnDisconnect(int onerror)
-{
-  (void)onerror;
-  this->OnConnectionShuttingDown();
-  if (this->Server) {
-    this->Server->OnDisconnect(this);
-  }
-}
-
-cmConnection::~cmConnection() = default;
-
-bool cmConnection::OnConnectionShuttingDown()
-{
-  this->Server = nullptr;
-  return true;
-}
-
-void cmConnection::SetServer(cmServerBase* s)
-{
-  Server = s;
-}
-
-void cmConnection::ProcessRequest(const std::string& request)
-{
-  Server->ProcessRequest(this, request);
-}
-
-bool cmConnection::OnServeStart(std::string* errString)
-{
-  (void)errString;
-  return true;
-}
-
-bool cmEventBasedConnection::OnConnectionShuttingDown()
-{
-  if (this->WriteStream.get()) {
-    this->WriteStream->data = nullptr;
-  }
-
-  WriteStream.reset();
-
-  return true;
-}
diff --git a/Source/cmConnection.h b/Source/cmConnection.h
deleted file mode 100644
index 5335a7f..0000000
--- a/Source/cmConnection.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <cstddef>
-#include <memory>
-#include <string>
-
-#include <cm3p/uv.h>
-
-#include "cmUVHandlePtr.h"
-
-class cmServerBase;
-
-/***
- * Given a sequence of bytes with any kind of buffering, instances of this
- * class arrange logical chunks according to whatever the use case is for
- * the connection.
- */
-class cmConnectionBufferStrategy
-{
-public:
-  virtual ~cmConnectionBufferStrategy();
-
-  /***
-   * Called whenever with an active raw buffer. If a logical chunk
-   * becomes available, that chunk is returned and that portion is
-   * removed from the rawBuffer
-   *
-   * @param rawBuffer in/out parameter. Receive buffer; the buffer strategy is
-   * free to manipulate this buffer anyway it needs to.
-   *
-   * @return Next chunk from the stream. Returns the empty string if a chunk
-   * isn't ready yet. Users of this interface should repeatedly call this
-   * function until an empty string is returned since its entirely possible
-   * multiple chunks come in a single raw buffer.
-   */
-  virtual std::string BufferMessage(std::string& rawBuffer) = 0;
-
-  /***
-   * Called to properly buffer an outgoing message.
-   *
-   * @param rawBuffer Message to format in the correct way
-   *
-   * @return Formatted message
-   */
-  virtual std::string BufferOutMessage(const std::string& rawBuffer) const
-  {
-    return rawBuffer;
-  };
-  /***
-   * Resets the internal state of the buffering
-   */
-  virtual void clear();
-
-  // TODO: There should be a callback / flag set for errors
-};
-
-class cmConnection
-{
-public:
-  cmConnection() = default;
-
-  cmConnection(cmConnection const&) = delete;
-  cmConnection& operator=(cmConnection const&) = delete;
-
-  virtual void WriteData(const std::string& data) = 0;
-
-  virtual ~cmConnection();
-
-  virtual bool OnConnectionShuttingDown();
-
-  virtual bool IsOpen() const = 0;
-
-  virtual void SetServer(cmServerBase* s);
-
-  virtual void ProcessRequest(const std::string& request);
-
-  virtual bool OnServeStart(std::string* pString);
-
-protected:
-  cmServerBase* Server = nullptr;
-};
-
-/***
- * Abstraction of a connection; ties in event callbacks from libuv and notifies
- * the server when appropriate
- */
-class cmEventBasedConnection : public cmConnection
-{
-
-public:
-  /***
-   * @param bufferStrategy If no strategy is given, it will process the raw
-   * chunks as they come in. The connection
-   * owns the pointer given.
-   */
-  cmEventBasedConnection(cmConnectionBufferStrategy* bufferStrategy = nullptr);
-
-  virtual void Connect(uv_stream_t* server);
-
-  virtual void ReadData(const std::string& data);
-
-  bool IsOpen() const override;
-
-  void WriteData(const std::string& data) override;
-  bool OnConnectionShuttingDown() override;
-
-  virtual void OnDisconnect(int errorCode);
-
-  static void on_close(uv_handle_t* handle);
-
-  template <typename T>
-  static void on_close_delete(uv_handle_t* handle)
-  {
-    delete reinterpret_cast<T*>(handle);
-  }
-
-protected:
-  cm::uv_stream_ptr WriteStream;
-
-  std::string RawReadBuffer;
-
-  std::unique_ptr<cmConnectionBufferStrategy> BufferStrategy;
-
-  static void on_read(uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf);
-
-  static void on_write(uv_write_t* req, int status);
-
-  static void on_new_connection(uv_stream_t* stream, int status);
-
-  static void on_alloc_buffer(uv_handle_t* handle, size_t suggested_size,
-                              uv_buf_t* buf);
-};
diff --git a/Source/cmCustomCommandGenerator.cxx b/Source/cmCustomCommandGenerator.cxx
index 60504ba..d8307f6 100644
--- a/Source/cmCustomCommandGenerator.cxx
+++ b/Source/cmCustomCommandGenerator.cxx
@@ -6,18 +6,22 @@
 #include <memory>
 #include <utility>
 
+#include <cm/optional>
 #include <cmext/algorithm>
 
+#include "cmCryptoHash.h"
 #include "cmCustomCommand.h"
 #include "cmCustomCommandLines.h"
 #include "cmGeneratorExpression.h"
 #include "cmGeneratorTarget.h"
+#include "cmGlobalGenerator.h"
 #include "cmLocalGenerator.h"
 #include "cmMakefile.h"
 #include "cmProperty.h"
 #include "cmStateTypes.h"
 #include "cmStringAlgorithms.h"
 #include "cmSystemTools.h"
+#include "cmTransformDepfile.h"
 
 namespace {
 void AppendPaths(const std::vector<std::string>& inputs,
@@ -42,7 +46,8 @@ void AppendPaths(const std::vector<std::string>& inputs,
 
 cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
                                                    std::string config,
-                                                   cmLocalGenerator* lg)
+                                                   cmLocalGenerator* lg,
+                                                   bool transformDepfile)
   : CC(cc)
   , Config(std::move(config))
   , LG(lg)
@@ -75,6 +80,36 @@ cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
     this->CommandLines.push_back(std::move(argv));
   }
 
+  if (transformDepfile && !this->CommandLines.empty() &&
+      !cc.GetDepfile().empty() &&
+      this->LG->GetGlobalGenerator()->DepfileFormat()) {
+    cmCustomCommandLine argv;
+    argv.push_back(cmSystemTools::GetCMakeCommand());
+    argv.emplace_back("-E");
+    argv.emplace_back("cmake_transform_depfile");
+    switch (*this->LG->GetGlobalGenerator()->DepfileFormat()) {
+      case cmDepfileFormat::GccDepfile:
+        argv.emplace_back("gccdepfile");
+        break;
+      case cmDepfileFormat::VsTlog:
+        argv.emplace_back("vstlog");
+        break;
+    }
+    if (this->LG->GetCurrentBinaryDirectory() ==
+        this->LG->GetBinaryDirectory()) {
+      argv.emplace_back("./");
+    } else {
+      argv.push_back(cmStrCat(this->LG->MaybeConvertToRelativePath(
+                                this->LG->GetBinaryDirectory(),
+                                this->LG->GetCurrentBinaryDirectory()),
+                              '/'));
+    }
+    argv.push_back(this->GetFullDepfile());
+    argv.push_back(this->GetInternalDepfile());
+
+    this->CommandLines.push_back(std::move(argv));
+  }
+
   AppendPaths(cc.GetByproducts(), ge, this->LG, this->Config,
               this->Byproducts);
   AppendPaths(cc.GetDepends(), ge, this->LG, this->Config, this->Depends);
@@ -97,7 +132,7 @@ cmCustomCommandGenerator::cmCustomCommandGenerator(cmCustomCommand const& cc,
 
 unsigned int cmCustomCommandGenerator::GetNumberOfCommands() const
 {
-  return static_cast<unsigned int>(this->CC.GetCommandLines().size());
+  return static_cast<unsigned int>(this->CommandLines.size());
 }
 
 void cmCustomCommandGenerator::FillEmulatorsWithArguments()
@@ -234,6 +269,40 @@ void cmCustomCommandGenerator::AppendArguments(unsigned int c,
   }
 }
 
+std::string cmCustomCommandGenerator::GetFullDepfile() const
+{
+  std::string depfile = this->CC.GetDepfile();
+  if (depfile.empty()) {
+    return "";
+  }
+
+  if (!cmSystemTools::FileIsFullPath(depfile)) {
+    depfile = cmStrCat(this->LG->GetCurrentBinaryDirectory(), '/', depfile);
+  }
+  return cmSystemTools::CollapseFullPath(depfile);
+}
+
+std::string cmCustomCommandGenerator::GetInternalDepfile() const
+{
+  std::string depfile = this->GetFullDepfile();
+  if (depfile.empty()) {
+    return "";
+  }
+
+  cmCryptoHash hash(cmCryptoHash::AlgoSHA256);
+  std::string extension;
+  switch (*this->LG->GetGlobalGenerator()->DepfileFormat()) {
+    case cmDepfileFormat::GccDepfile:
+      extension = ".d";
+      break;
+    case cmDepfileFormat::VsTlog:
+      extension = ".tlog";
+      break;
+  }
+  return cmStrCat(this->LG->GetBinaryDirectory(), "/CMakeFiles/d/",
+                  hash.HashString(depfile), extension);
+}
+
 const char* cmCustomCommandGenerator::GetComment() const
 {
   return this->CC.GetComment();
diff --git a/Source/cmCustomCommandGenerator.h b/Source/cmCustomCommandGenerator.h
index 412eba8..8b5259d 100644
--- a/Source/cmCustomCommandGenerator.h
+++ b/Source/cmCustomCommandGenerator.h
@@ -31,7 +31,7 @@ class cmCustomCommandGenerator
 
 public:
   cmCustomCommandGenerator(cmCustomCommand const& cc, std::string config,
-                           cmLocalGenerator* lg);
+                           cmLocalGenerator* lg, bool transformDepfile = true);
   cmCustomCommandGenerator(const cmCustomCommandGenerator&) = delete;
   cmCustomCommandGenerator& operator=(const cmCustomCommandGenerator&) =
     delete;
@@ -45,4 +45,6 @@ public:
   std::vector<std::string> const& GetByproducts() const;
   std::vector<std::string> const& GetDepends() const;
   bool HasOnlyEmptyCommandLines() const;
+  std::string GetFullDepfile() const;
+  std::string GetInternalDepfile() const;
 };
diff --git a/Source/cmExportFileGenerator.cxx b/Source/cmExportFileGenerator.cxx
index cbae4e5..a853bb1 100644
--- a/Source/cmExportFileGenerator.cxx
+++ b/Source/cmExportFileGenerator.cxx
@@ -924,13 +924,13 @@ void cmExportFileGenerator::GeneratePolicyHeaderCode(std::ostream& os)
 
   // Isolate the file policy level.
   // Support CMake versions as far back as 2.6 but also support using NEW
-  // policy settings for up to CMake 3.17 (this upper limit may be reviewed
+  // policy settings for up to CMake 3.18 (this upper limit may be reviewed
   // and increased from time to time). This reduces the opportunity for CMake
   // warnings when an older export file is later used with newer CMake
   // versions.
   /* clang-format off */
   os << "cmake_policy(PUSH)\n"
-     << "cmake_policy(VERSION 2.6...3.17)\n";
+     << "cmake_policy(VERSION 2.6...3.18)\n";
   /* clang-format on */
 }
 
diff --git a/Source/cmFileCommand.cxx b/Source/cmFileCommand.cxx
index 8a3aad2..cd440ad 100644
--- a/Source/cmFileCommand.cxx
+++ b/Source/cmFileCommand.cxx
@@ -15,6 +15,7 @@
 #include <vector>
 
 #include <cm/memory>
+#include <cm/string_view>
 #include <cmext/algorithm>
 #include <cmext/string_view>
 
@@ -2314,49 +2315,92 @@ bool HandleGenerateCommand(std::vector<std::string> const& args,
     status.SetError("Incorrect arguments to GENERATE subcommand.");
     return false;
   }
-  if (args[1] != "OUTPUT") {
+
+  struct Arguments
+  {
+    std::string Output;
+    std::string Input;
+    std::string Content;
+    std::string Condition;
+    std::string Target;
+  };
+
+  static auto const parser = cmArgumentParser<Arguments>{}
+                               .Bind("OUTPUT"_s, &Arguments::Output)
+                               .Bind("INPUT"_s, &Arguments::Input)
+                               .Bind("CONTENT"_s, &Arguments::Content)
+                               .Bind("CONDITION"_s, &Arguments::Condition)
+                               .Bind("TARGET"_s, &Arguments::Target);
+
+  std::vector<std::string> unparsedArguments;
+  std::vector<std::string> keywordsMissingValues;
+  std::vector<std::string> parsedKeywords;
+  Arguments const arguments =
+    parser.Parse(cmMakeRange(args).advance(1), &unparsedArguments,
+                 &keywordsMissingValues, &parsedKeywords);
+
+  if (!keywordsMissingValues.empty()) {
     status.SetError("Incorrect arguments to GENERATE subcommand.");
     return false;
   }
 
-  std::string condition;
-  std::string target;
-
-  for (std::size_t i = 5; i < args.size();) {
-    const std::string& arg = args[i++];
+  if (!unparsedArguments.empty()) {
+    status.SetError("Unknown argument to GENERATE subcommand.");
+    return false;
+  }
 
-    if (args.size() - i == 0) {
-      status.SetError("Incorrect arguments to GENERATE subcommand.");
-      return false;
+  bool mandatoryOptionsSpecified = false;
+  if (parsedKeywords.size() > 1) {
+    const bool outputOprionSpecified = parsedKeywords[0] == "OUTPUT"_s;
+    const bool inputOrContentSpecified =
+      parsedKeywords[1] == "INPUT"_s || parsedKeywords[1] == "CONTENT"_s;
+    if (outputOprionSpecified && inputOrContentSpecified) {
+      mandatoryOptionsSpecified = true;
     }
+  }
+  if (!mandatoryOptionsSpecified) {
+    status.SetError("Incorrect arguments to GENERATE subcommand.");
+    return false;
+  }
 
-    const std::string& value = args[i++];
-
-    if (value.empty()) {
-      status.SetError(
-        arg + " of sub-command GENERATE must not be empty if specified.");
-      return false;
-    }
+  const bool conditionOptionSpecified =
+    std::find(parsedKeywords.begin(), parsedKeywords.end(), "CONDITION"_s) !=
+    parsedKeywords.end();
+  if (conditionOptionSpecified && arguments.Condition.empty()) {
+    status.SetError("CONDITION of sub-command GENERATE must not be empty "
+                    "if specified.");
+    return false;
+  }
 
-    if (arg == "CONDITION") {
-      condition = value;
-    } else if (arg == "TARGET") {
-      target = value;
-    } else {
-      status.SetError("Unknown argument to GENERATE subcommand.");
-      return false;
-    }
+  const bool targetOptionSpecified =
+    std::find(parsedKeywords.begin(), parsedKeywords.end(), "TARGET"_s) !=
+    parsedKeywords.end();
+  if (targetOptionSpecified && arguments.Target.empty()) {
+    status.SetError("TARGET of sub-command GENERATE must not be empty "
+                    "if specified.");
+    return false;
   }
 
-  std::string output = args[2];
-  const bool inputIsContent = args[3] != "INPUT";
-  if (inputIsContent && args[3] != "CONTENT") {
+  const bool outputOptionSpecified =
+    std::find(parsedKeywords.begin(), parsedKeywords.end(), "OUTPUT"_s) !=
+    parsedKeywords.end();
+  if (outputOptionSpecified && parsedKeywords[0] != "OUTPUT"_s) {
     status.SetError("Incorrect arguments to GENERATE subcommand.");
     return false;
   }
-  std::string input = args[4];
 
-  AddEvaluationFile(input, target, output, condition, inputIsContent, status);
+  const bool inputIsContent = parsedKeywords[1] != "INPUT"_s;
+  if (inputIsContent && parsedKeywords[1] != "CONTENT") {
+    status.SetError("Unknown argument to GENERATE subcommand.");
+  }
+
+  std::string input = arguments.Input;
+  if (inputIsContent) {
+    input = arguments.Content;
+  }
+
+  AddEvaluationFile(input, arguments.Target, arguments.Output,
+                    arguments.Condition, inputIsContent, status);
   return true;
 }
 
diff --git a/Source/cmFileMonitor.cxx b/Source/cmFileMonitor.cxx
deleted file mode 100644
index 8cfdb2d..0000000
--- a/Source/cmFileMonitor.cxx
+++ /dev/null
@@ -1,383 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmFileMonitor.h"
-
-#include <cassert>
-#include <cstddef>
-#include <unordered_map>
-#include <utility>
-
-#include <cm/memory>
-
-#include "cmsys/SystemTools.hxx"
-
-namespace {
-void on_directory_change(uv_fs_event_t* handle, const char* filename,
-                         int events, int status);
-void on_fs_close(uv_handle_t* handle);
-} // namespace
-
-class cmIBaseWatcher
-{
-public:
-  virtual ~cmIBaseWatcher() = default;
-
-  virtual void Trigger(const std::string& pathSegment, int events,
-                       int status) const = 0;
-  virtual std::string Path() const = 0;
-  virtual uv_loop_t* Loop() const = 0;
-
-  virtual void StartWatching() = 0;
-  virtual void StopWatching() = 0;
-
-  virtual std::vector<std::string> WatchedFiles() const = 0;
-  virtual std::vector<std::string> WatchedDirectories() const = 0;
-};
-
-class cmVirtualDirectoryWatcher : public cmIBaseWatcher
-{
-public:
-  ~cmVirtualDirectoryWatcher() override = default;
-
-  cmIBaseWatcher* Find(const std::string& ps)
-  {
-    const auto i = this->Children.find(ps);
-    return (i == this->Children.end()) ? nullptr : i->second.get();
-  }
-
-  void Trigger(const std::string& pathSegment, int events,
-               int status) const final
-  {
-    if (pathSegment.empty()) {
-      for (auto const& child : this->Children) {
-        child.second->Trigger(std::string(), events, status);
-      }
-    } else {
-      const auto i = this->Children.find(pathSegment);
-      if (i != this->Children.end()) {
-        i->second->Trigger(std::string(), events, status);
-      }
-    }
-  }
-
-  void StartWatching() override
-  {
-    for (auto const& child : this->Children) {
-      child.second->StartWatching();
-    }
-  }
-
-  void StopWatching() override
-  {
-    for (auto const& child : this->Children) {
-      child.second->StopWatching();
-    }
-  }
-
-  std::vector<std::string> WatchedFiles() const final
-  {
-    std::vector<std::string> result;
-    for (auto const& child : this->Children) {
-      for (std::string const& f : child.second->WatchedFiles()) {
-        result.push_back(f);
-      }
-    }
-    return result;
-  }
-
-  std::vector<std::string> WatchedDirectories() const override
-  {
-    std::vector<std::string> result;
-    for (auto const& child : this->Children) {
-      for (std::string const& dir : child.second->WatchedDirectories()) {
-        result.push_back(dir);
-      }
-    }
-    return result;
-  }
-
-  void Reset() { this->Children.clear(); }
-
-  void AddChildWatcher(const std::string& ps, cmIBaseWatcher* watcher)
-  {
-    assert(!ps.empty());
-    assert(this->Children.find(ps) == this->Children.end());
-    assert(watcher);
-
-    this->Children.emplace(ps, std::unique_ptr<cmIBaseWatcher>(watcher));
-  }
-
-private:
-  std::unordered_map<std::string, std::unique_ptr<cmIBaseWatcher>>
-    Children; // owned!
-};
-
-// Root of all the different (on windows!) root directories:
-class cmRootWatcher : public cmVirtualDirectoryWatcher
-{
-public:
-  cmRootWatcher(uv_loop_t* loop)
-    : mLoop(loop)
-  {
-    assert(loop);
-  }
-
-  std::string Path() const final
-  {
-    assert(false);
-    return std::string();
-  }
-  uv_loop_t* Loop() const final { return this->mLoop; }
-
-private:
-  uv_loop_t* const mLoop; // no ownership!
-};
-
-// Real directories:
-class cmRealDirectoryWatcher : public cmVirtualDirectoryWatcher
-{
-public:
-  cmRealDirectoryWatcher(cmVirtualDirectoryWatcher* p, const std::string& ps)
-    : Parent(p)
-    , PathSegment(ps)
-  {
-    assert(p);
-    assert(!ps.empty());
-
-    p->AddChildWatcher(ps, this);
-  }
-
-  void StartWatching() final
-  {
-    if (!this->Handle) {
-      this->Handle = new uv_fs_event_t;
-
-      uv_fs_event_init(this->Loop(), this->Handle);
-      this->Handle->data = this;
-      uv_fs_event_start(this->Handle, &on_directory_change, Path().c_str(), 0);
-    }
-    cmVirtualDirectoryWatcher::StartWatching();
-  }
-
-  void StopWatching() final
-  {
-    if (this->Handle) {
-      uv_fs_event_stop(this->Handle);
-      if (!uv_is_closing(reinterpret_cast<uv_handle_t*>(this->Handle))) {
-        uv_close(reinterpret_cast<uv_handle_t*>(this->Handle), &on_fs_close);
-      }
-      this->Handle = nullptr;
-    }
-    cmVirtualDirectoryWatcher::StopWatching();
-  }
-
-  uv_loop_t* Loop() const final { return this->Parent->Loop(); }
-
-  std::vector<std::string> WatchedDirectories() const override
-  {
-    std::vector<std::string> result = { Path() };
-    for (std::string const& dir :
-         cmVirtualDirectoryWatcher::WatchedDirectories()) {
-      result.push_back(dir);
-    }
-    return result;
-  }
-
-protected:
-  cmVirtualDirectoryWatcher* const Parent;
-  const std::string PathSegment;
-
-private:
-  uv_fs_event_t* Handle = nullptr; // owner!
-};
-
-// Root directories:
-class cmRootDirectoryWatcher : public cmRealDirectoryWatcher
-{
-public:
-  cmRootDirectoryWatcher(cmRootWatcher* p, const std::string& ps)
-    : cmRealDirectoryWatcher(p, ps)
-  {
-  }
-
-  std::string Path() const final { return this->PathSegment; }
-};
-
-// Normal directories below root:
-class cmDirectoryWatcher : public cmRealDirectoryWatcher
-{
-public:
-  cmDirectoryWatcher(cmRealDirectoryWatcher* p, const std::string& ps)
-    : cmRealDirectoryWatcher(p, ps)
-  {
-  }
-
-  std::string Path() const final
-  {
-    return this->Parent->Path() + this->PathSegment + "/";
-  }
-};
-
-class cmFileWatcher : public cmIBaseWatcher
-{
-public:
-  cmFileWatcher(cmRealDirectoryWatcher* p, const std::string& ps,
-                cmFileMonitor::Callback cb)
-    : Parent(p)
-    , PathSegment(ps)
-    , CbList({ std::move(cb) })
-  {
-    assert(p);
-    assert(!ps.empty());
-    p->AddChildWatcher(ps, this);
-  }
-
-  void StartWatching() final {}
-
-  void StopWatching() final {}
-
-  void AppendCallback(cmFileMonitor::Callback const& cb)
-  {
-    this->CbList.push_back(cb);
-  }
-
-  std::string Path() const final
-  {
-    return this->Parent->Path() + this->PathSegment;
-  }
-
-  std::vector<std::string> WatchedDirectories() const final { return {}; }
-
-  std::vector<std::string> WatchedFiles() const final
-  {
-    return { this->Path() };
-  }
-
-  void Trigger(const std::string& ps, int events, int status) const final
-  {
-    assert(ps.empty());
-    assert(status == 0);
-    static_cast<void>(ps);
-
-    const std::string path = this->Path();
-    for (cmFileMonitor::Callback const& cb : this->CbList) {
-      cb(path, events, status);
-    }
-  }
-
-  uv_loop_t* Loop() const final { return this->Parent->Loop(); }
-
-private:
-  cmRealDirectoryWatcher* Parent;
-  const std::string PathSegment;
-  std::vector<cmFileMonitor::Callback> CbList;
-};
-
-namespace {
-
-void on_directory_change(uv_fs_event_t* handle, const char* filename,
-                         int events, int status)
-{
-  const cmIBaseWatcher* const watcher =
-    static_cast<const cmIBaseWatcher*>(handle->data);
-  const std::string pathSegment(filename ? filename : "");
-  watcher->Trigger(pathSegment, events, status);
-}
-
-void on_fs_close(uv_handle_t* handle)
-{
-  delete reinterpret_cast<uv_fs_event_t*>(handle);
-}
-
-} // namespace
-
-cmFileMonitor::cmFileMonitor(uv_loop_t* l)
-  : Root(cm::make_unique<cmRootWatcher>(l))
-{
-}
-
-cmFileMonitor::~cmFileMonitor() = default;
-
-void cmFileMonitor::MonitorPaths(const std::vector<std::string>& paths,
-                                 Callback const& cb)
-{
-  for (std::string const& p : paths) {
-    std::vector<std::string> pathSegments;
-    cmsys::SystemTools::SplitPath(p, pathSegments, true);
-    const bool pathIsFile = !cmsys::SystemTools::FileIsDirectory(p);
-
-    const size_t segmentCount = pathSegments.size();
-    if (segmentCount < 2) { // Expect at least rootdir and filename
-      continue;
-    }
-    cmVirtualDirectoryWatcher* currentWatcher = this->Root.get();
-    for (size_t i = 0; i < segmentCount; ++i) {
-      assert(currentWatcher);
-
-      const bool fileSegment = (i == segmentCount - 1 && pathIsFile);
-      const bool rootSegment = (i == 0);
-      assert(
-        !(fileSegment &&
-          rootSegment)); // Can not be both filename and root part of the path!
-
-      const std::string& currentSegment = pathSegments[i];
-      if (currentSegment.empty()) {
-        continue;
-      }
-
-      cmIBaseWatcher* nextWatcher = currentWatcher->Find(currentSegment);
-      if (!nextWatcher) {
-        if (rootSegment) { // Root part
-          assert(currentWatcher == this->Root.get());
-          nextWatcher =
-            new cmRootDirectoryWatcher(this->Root.get(), currentSegment);
-          assert(currentWatcher->Find(currentSegment) == nextWatcher);
-        } else if (fileSegment) { // File part
-          assert(currentWatcher != this->Root.get());
-          nextWatcher = new cmFileWatcher(
-            dynamic_cast<cmRealDirectoryWatcher*>(currentWatcher),
-            currentSegment, cb);
-          assert(currentWatcher->Find(currentSegment) == nextWatcher);
-        } else { // Any normal directory in between
-          nextWatcher = new cmDirectoryWatcher(
-            dynamic_cast<cmRealDirectoryWatcher*>(currentWatcher),
-            currentSegment);
-          assert(currentWatcher->Find(currentSegment) == nextWatcher);
-        }
-      } else {
-        if (fileSegment) {
-          auto filePtr = dynamic_cast<cmFileWatcher*>(nextWatcher);
-          assert(filePtr);
-          filePtr->AppendCallback(cb);
-          continue;
-        }
-      }
-      currentWatcher = dynamic_cast<cmVirtualDirectoryWatcher*>(nextWatcher);
-    }
-  }
-  this->Root->StartWatching();
-}
-
-void cmFileMonitor::StopMonitoring()
-{
-  this->Root->StopWatching();
-  this->Root->Reset();
-}
-
-std::vector<std::string> cmFileMonitor::WatchedFiles() const
-{
-  std::vector<std::string> result;
-  if (this->Root) {
-    result = this->Root->WatchedFiles();
-  }
-  return result;
-}
-
-std::vector<std::string> cmFileMonitor::WatchedDirectories() const
-{
-  std::vector<std::string> result;
-  if (this->Root) {
-    result = this->Root->WatchedDirectories();
-  }
-  return result;
-}
diff --git a/Source/cmFileMonitor.h b/Source/cmFileMonitor.h
deleted file mode 100644
index fc75b0c..0000000
--- a/Source/cmFileMonitor.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <functional>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <cm3p/uv.h>
-
-class cmRootWatcher;
-
-class cmFileMonitor
-{
-
-public:
-  cmFileMonitor(uv_loop_t* l);
-  ~cmFileMonitor();
-
-  cmFileMonitor(cmFileMonitor const&) = delete;
-  cmFileMonitor& operator=(cmFileMonitor const&) = delete;
-
-  using Callback = std::function<void(const std::string&, int, int)>;
-  void MonitorPaths(const std::vector<std::string>& paths, Callback const& cb);
-  void StopMonitoring();
-
-  std::vector<std::string> WatchedFiles() const;
-  std::vector<std::string> WatchedDirectories() const;
-
-private:
-  std::unique_ptr<cmRootWatcher> Root;
-};
diff --git a/Source/cmGccDepfileLexerHelper.cxx b/Source/cmGccDepfileLexerHelper.cxx
index 957896f..c782bcd 100644
--- a/Source/cmGccDepfileLexerHelper.cxx
+++ b/Source/cmGccDepfileLexerHelper.cxx
@@ -27,23 +27,30 @@ bool cmGccDepfileLexerHelper::readFile(const char* filePath)
   if (!file) {
     return false;
   }
-  newEntry();
+  this->newEntry();
   yyscan_t scanner;
   cmGccDepfile_yylex_init(&scanner);
   cmGccDepfile_yyset_extra(this, scanner);
   cmGccDepfile_yyrestart(file, scanner);
   cmGccDepfile_yylex(scanner);
   cmGccDepfile_yylex_destroy(scanner);
-  sanitizeContent();
+  this->sanitizeContent();
   fclose(file);
-  return true;
+  return this->HelperState != State::Failed;
 }
 
 void cmGccDepfileLexerHelper::newEntry()
 {
+  if (this->HelperState == State::Rule && !this->Content.empty()) {
+    if (!this->Content.back().rules.empty() &&
+        !this->Content.back().rules.back().empty()) {
+      this->HelperState = State::Failed;
+    }
+    return;
+  }
   this->HelperState = State::Rule;
   this->Content.emplace_back();
-  newRule();
+  this->newRule();
 }
 
 void cmGccDepfileLexerHelper::newRule()
@@ -56,20 +63,22 @@ void cmGccDepfileLexerHelper::newRule()
 
 void cmGccDepfileLexerHelper::newDependency()
 {
-  // printf("NEW DEP\n");
+  if (this->HelperState == State::Failed) {
+    return;
+  }
   this->HelperState = State::Dependency;
-  if (this->Content.back().paths.empty() ||
-      !this->Content.back().paths.back().empty()) {
-    this->Content.back().paths.emplace_back();
+  auto& entry = this->Content.back();
+  if (entry.paths.empty() || !entry.paths.back().empty()) {
+    entry.paths.emplace_back();
   }
 }
 
 void cmGccDepfileLexerHelper::newRuleOrDependency()
 {
   if (this->HelperState == State::Rule) {
-    newRule();
-  } else {
-    newDependency();
+    this->newRule();
+  } else if (this->HelperState == State::Dependency) {
+    this->newDependency();
   }
 }
 
@@ -93,6 +102,8 @@ void cmGccDepfileLexerHelper::addToCurrentPath(const char* s)
       }
       dst = &dep->paths.back();
     } break;
+    case State::Failed:
+      return;
   }
   dst->append(s);
 }
diff --git a/Source/cmGccDepfileLexerHelper.h b/Source/cmGccDepfileLexerHelper.h
index 07ca61d..91132f5 100644
--- a/Source/cmGccDepfileLexerHelper.h
+++ b/Source/cmGccDepfileLexerHelper.h
@@ -29,7 +29,8 @@ private:
   enum class State
   {
     Rule,
-    Dependency
+    Dependency,
+    Failed,
   };
   State HelperState = State::Rule;
 };
diff --git a/Source/cmGccDepfileReader.cxx b/Source/cmGccDepfileReader.cxx
index 9d70ede..eb3511a 100644
--- a/Source/cmGccDepfileReader.cxx
+++ b/Source/cmGccDepfileReader.cxx
@@ -5,14 +5,15 @@
 #include <type_traits>
 #include <utility>
 
+#include <cm/optional>
+
 #include "cmGccDepfileLexerHelper.h"
 
-cmGccDepfileContent cmReadGccDepfile(const char* filePath)
+cm::optional<cmGccDepfileContent> cmReadGccDepfile(const char* filePath)
 {
-  cmGccDepfileContent result;
   cmGccDepfileLexerHelper helper;
   if (helper.readFile(filePath)) {
-    result = std::move(helper).extractContent();
+    return cm::make_optional(std::move(helper).extractContent());
   }
-  return result;
+  return cm::nullopt;
 }
diff --git a/Source/cmGccDepfileReader.h b/Source/cmGccDepfileReader.h
index 395dd77..59ed7fd 100644
--- a/Source/cmGccDepfileReader.h
+++ b/Source/cmGccDepfileReader.h
@@ -2,6 +2,8 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #pragma once
 
+#include <cm/optional>
+
 #include "cmGccDepfileReaderTypes.h"
 
-cmGccDepfileContent cmReadGccDepfile(const char* filePath);
+cm::optional<cmGccDepfileContent> cmReadGccDepfile(const char* filePath);
diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx
index bdea9fa..3b47550 100644
--- a/Source/cmGeneratorTarget.cxx
+++ b/Source/cmGeneratorTarget.cxx
@@ -1539,10 +1539,14 @@ bool processSources(cmGeneratorTarget const* tgt,
     for (std::string& src : entry.Values) {
       cmSourceFile* sf = mf->GetOrCreateSource(src);
       std::string e;
-      std::string fullPath = sf->ResolveFullPath(&e);
+      std::string w;
+      std::string fullPath = sf->ResolveFullPath(&e, &w);
+      cmake* cm = tgt->GetLocalGenerator()->GetCMakeInstance();
+      if (!w.empty()) {
+        cm->IssueMessage(MessageType::AUTHOR_WARNING, w, tgt->GetBacktrace());
+      }
       if (fullPath.empty()) {
         if (!e.empty()) {
-          cmake* cm = tgt->GetLocalGenerator()->GetCMakeInstance();
           cm->IssueMessage(MessageType::FATAL_ERROR, e, tgt->GetBacktrace());
         }
         return contextDependent;
@@ -2986,7 +2990,8 @@ void cmTargetTraceDependencies::FollowName(std::string const& name)
   auto i = this->NameMap.lower_bound(name);
   if (i == this->NameMap.end() || i->first != name) {
     // Check if we know how to generate this file.
-    cmSourcesWithOutput sources = this->Makefile->GetSourcesWithOutput(name);
+    cmSourcesWithOutput sources =
+      this->LocalGenerator->GetSourcesWithOutput(name);
     // If we failed to find a target or source and we have a relative path, it
     // might be a valid source if made relative to the current binary
     // directory.
@@ -2996,7 +3001,7 @@ void cmTargetTraceDependencies::FollowName(std::string const& name)
         cmStrCat(this->Makefile->GetCurrentBinaryDirectory(), '/', name);
       fullname = cmSystemTools::CollapseFullPath(
         fullname, this->Makefile->GetHomeOutputDirectory());
-      sources = this->Makefile->GetSourcesWithOutput(fullname);
+      sources = this->LocalGenerator->GetSourcesWithOutput(fullname);
     }
     i = this->NameMap.emplace_hint(i, name, sources);
   }
diff --git a/Source/cmGhsMultiTargetGenerator.cxx b/Source/cmGhsMultiTargetGenerator.cxx
index a8f8f57..ed50067 100644
--- a/Source/cmGhsMultiTargetGenerator.cxx
+++ b/Source/cmGhsMultiTargetGenerator.cxx
@@ -763,9 +763,9 @@ bool cmGhsMultiTargetGenerator::VisitCustomCommand(
     /* set temporary mark; check if revisit*/
     if (temp.insert(si).second) {
       for (auto& di : si->GetCustomCommand()->GetDepends()) {
-        cmSourceFile const* sf = this->GeneratorTarget->GetLocalGenerator()
-                                   ->GetMakefile()
-                                   ->GetSourceFileWithOutput(di);
+        cmSourceFile const* sf =
+          this->GeneratorTarget->GetLocalGenerator()->GetSourceFileWithOutput(
+            di);
         /* if sf exists then visit */
         if (sf && this->VisitCustomCommand(temp, perm, order, sf)) {
           return true;
diff --git a/Source/cmGlobalGenerator.h b/Source/cmGlobalGenerator.h
index b532a43..de5eba7 100644
--- a/Source/cmGlobalGenerator.h
+++ b/Source/cmGlobalGenerator.h
@@ -14,6 +14,7 @@
 #include <utility>
 #include <vector>
 
+#include <cm/optional>
 #include <cmext/algorithm>
 
 #include "cm_codecvt.hxx"
@@ -26,6 +27,7 @@
 #include "cmSystemTools.h"
 #include "cmTarget.h"
 #include "cmTargetDepend.h"
+#include "cmTransformDepfile.h"
 
 #if !defined(CMAKE_BOOTSTRAP)
 #  include <cm3p/json/value.h>
@@ -452,6 +454,10 @@ public:
   virtual bool ShouldStripResourcePath(cmMakefile*) const;
 
   virtual bool SupportsCustomCommandDepfile() const { return false; }
+  virtual cm::optional<cmDepfileFormat> DepfileFormat() const
+  {
+    return cm::nullopt;
+  }
 
   std::string GetSharedLibFlagsForLanguage(std::string const& lang) const;
 
diff --git a/Source/cmGlobalNinjaGenerator.cxx b/Source/cmGlobalNinjaGenerator.cxx
index 985f430..9e25a54 100644
--- a/Source/cmGlobalNinjaGenerator.cxx
+++ b/Source/cmGlobalNinjaGenerator.cxx
@@ -2650,30 +2650,17 @@ void cmGlobalNinjaMultiGenerator::GetQtAutoGenConfigs(
 
 bool cmGlobalNinjaMultiGenerator::InspectConfigTypeVariables()
 {
-  this->GetCMakeInstance()->MarkCliAsUsed("CMAKE_DEFAULT_BUILD_TYPE");
-  this->GetCMakeInstance()->MarkCliAsUsed("CMAKE_CROSS_CONFIGS");
-  this->GetCMakeInstance()->MarkCliAsUsed("CMAKE_DEFAULT_CONFIGS");
-  return this->ReadCacheEntriesForBuild(*this->Makefiles.front()->GetState());
-}
-
-std::string cmGlobalNinjaMultiGenerator::GetDefaultBuildConfig() const
-{
-  return "";
-}
-
-bool cmGlobalNinjaMultiGenerator::ReadCacheEntriesForBuild(
-  const cmState& state)
-{
   std::vector<std::string> configsVec;
-  cmExpandList(state.GetSafeCacheEntryValue("CMAKE_CONFIGURATION_TYPES"),
-               configsVec);
+  cmExpandList(
+    this->Makefiles.front()->GetSafeDefinition("CMAKE_CONFIGURATION_TYPES"),
+    configsVec);
   if (configsVec.empty()) {
     configsVec.emplace_back();
   }
   std::set<std::string> configs(configsVec.cbegin(), configsVec.cend());
 
   this->DefaultFileConfig =
-    state.GetSafeCacheEntryValue("CMAKE_DEFAULT_BUILD_TYPE");
+    this->Makefiles.front()->GetSafeDefinition("CMAKE_DEFAULT_BUILD_TYPE");
   if (this->DefaultFileConfig.empty()) {
     this->DefaultFileConfig = configsVec.front();
   }
@@ -2688,8 +2675,9 @@ bool cmGlobalNinjaMultiGenerator::ReadCacheEntriesForBuild(
   }
 
   std::vector<std::string> crossConfigsVec;
-  cmExpandList(state.GetSafeCacheEntryValue("CMAKE_CROSS_CONFIGS"),
-               crossConfigsVec);
+  cmExpandList(
+    this->Makefiles.front()->GetSafeDefinition("CMAKE_CROSS_CONFIGS"),
+    crossConfigsVec);
   auto crossConfigs = ListSubsetWithAll(configs, configs, crossConfigsVec);
   if (!crossConfigs) {
     std::ostringstream msg;
@@ -2702,7 +2690,7 @@ bool cmGlobalNinjaMultiGenerator::ReadCacheEntriesForBuild(
   this->CrossConfigs = *crossConfigs;
 
   auto defaultConfigsString =
-    state.GetSafeCacheEntryValue("CMAKE_DEFAULT_CONFIGS");
+    this->Makefiles.front()->GetSafeDefinition("CMAKE_DEFAULT_CONFIGS");
   if (defaultConfigsString.empty()) {
     defaultConfigsString = this->DefaultFileConfig;
   }
@@ -2736,6 +2724,11 @@ bool cmGlobalNinjaMultiGenerator::ReadCacheEntriesForBuild(
   return true;
 }
 
+std::string cmGlobalNinjaMultiGenerator::GetDefaultBuildConfig() const
+{
+  return "";
+}
+
 std::string cmGlobalNinjaMultiGenerator::OrderDependsTargetForTarget(
   cmGeneratorTarget const* target, const std::string& config) const
 {
diff --git a/Source/cmGlobalNinjaGenerator.h b/Source/cmGlobalNinjaGenerator.h
index 884a711..8d6ebdc 100644
--- a/Source/cmGlobalNinjaGenerator.h
+++ b/Source/cmGlobalNinjaGenerator.h
@@ -24,6 +24,7 @@
 #include "cmNinjaTypes.h"
 #include "cmPolicies.h"
 #include "cmStringAlgorithms.h"
+#include "cmTransformDepfile.h"
 
 class cmCustomCommand;
 class cmGeneratorTarget;
@@ -31,7 +32,6 @@ class cmLinkLineComputer;
 class cmLocalGenerator;
 class cmMakefile;
 class cmOutputConverter;
-class cmState;
 class cmStateDirectory;
 class cmake;
 struct cmDocumentationEntry;
@@ -211,6 +211,10 @@ public:
   const char* GetCleanTargetName() const override { return "clean"; }
 
   bool SupportsCustomCommandDepfile() const override { return true; }
+  cm::optional<cmDepfileFormat> DepfileFormat() const override
+  {
+    return cmDepfileFormat::GccDepfile;
+  }
 
   virtual cmGeneratedFileStream* GetImplFileStream(
     const std::string& /*config*/) const
@@ -647,8 +651,6 @@ public:
 
   std::string GetDefaultBuildConfig() const override;
 
-  bool ReadCacheEntriesForBuild(const cmState& state) override;
-
   bool SupportsDefaultBuildType() const override { return true; }
   bool SupportsCrossConfigs() const override { return true; }
   bool SupportsDefaultConfigs() const override { return true; }
diff --git a/Source/cmJsonObjectDictionary.h b/Source/cmJsonObjectDictionary.h
deleted file mode 100644
index 8a2b529..0000000
--- a/Source/cmJsonObjectDictionary.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include <string>
-
-// Vocabulary:
-
-static const std::string kARTIFACTS_KEY = "artifacts";
-static const std::string kBUILD_DIRECTORY_KEY = "buildDirectory";
-static const std::string kCOMPILE_FLAGS_KEY = "compileFlags";
-static const std::string kCONFIGURATIONS_KEY = "configurations";
-static const std::string kDEFINES_KEY = "defines";
-static const std::string kFILE_GROUPS_KEY = "fileGroups";
-static const std::string kFRAMEWORK_PATH_KEY = "frameworkPath";
-static const std::string kFULL_NAME_KEY = "fullName";
-static const std::string kINCLUDE_PATH_KEY = "includePath";
-static const std::string kIS_CMAKE_KEY = "isCMake";
-static const std::string kIS_GENERATED_KEY = "isGenerated";
-static const std::string kIS_SYSTEM_KEY = "isSystem";
-static const std::string kIS_TEMPORARY_KEY = "isTemporary";
-static const std::string kKEY_KEY = "key";
-static const std::string kLANGUAGE_KEY = "language";
-static const std::string kLINKER_LANGUAGE_KEY = "linkerLanguage";
-static const std::string kLINK_FLAGS_KEY = "linkFlags";
-static const std::string kLINK_LANGUAGE_FLAGS_KEY = "linkLanguageFlags";
-static const std::string kLINK_LIBRARIES_KEY = "linkLibraries";
-static const std::string kLINK_PATH_KEY = "linkPath";
-static const std::string kNAME_KEY = "name";
-static const std::string kPATH_KEY = "path";
-static const std::string kPROJECTS_KEY = "projects";
-static const std::string kPROPERTIES_KEY = "properties";
-static const std::string kSOURCE_DIRECTORY_KEY = "sourceDirectory";
-static const std::string kSOURCES_KEY = "sources";
-static const std::string kSYSROOT_KEY = "sysroot";
-static const std::string kTARGETS_KEY = "targets";
-static const std::string kTYPE_KEY = "type";
-static const std::string kVALUE_KEY = "value";
-static const std::string kHAS_INSTALL_RULE = "hasInstallRule";
-static const std::string kINSTALL_PATHS = "installPaths";
-static const std::string kCTEST_NAME = "ctestName";
-static const std::string kCTEST_COMMAND = "ctestCommand";
-static const std::string kCTEST_INFO = "ctestInfo";
-static const std::string kMINIMUM_CMAKE_VERSION = "minimumCMakeVersion";
-static const std::string kIS_GENERATOR_PROVIDED_KEY = "isGeneratorProvided";
diff --git a/Source/cmJsonObjects.cxx b/Source/cmJsonObjects.cxx
deleted file mode 100644
index 3a7ae0c..0000000
--- a/Source/cmJsonObjects.cxx
+++ /dev/null
@@ -1,692 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmJsonObjects.h" // IWYU pragma: keep
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <functional>
-#include <limits>
-#include <map>
-#include <memory>
-#include <set>
-#include <string>
-#include <unordered_map>
-#include <utility>
-#include <vector>
-
-#include <cmext/algorithm>
-
-#include "cmGeneratorExpression.h"
-#include "cmGeneratorTarget.h"
-#include "cmGlobalGenerator.h"
-#include "cmInstallGenerator.h"
-#include "cmInstallSubdirectoryGenerator.h"
-#include "cmInstallTargetGenerator.h"
-#include "cmJsonObjectDictionary.h"
-#include "cmJsonObjects.h"
-#include "cmLinkLineComputer.h"
-#include "cmLocalGenerator.h"
-#include "cmMakefile.h"
-#include "cmProperty.h"
-#include "cmPropertyMap.h"
-#include "cmSourceFile.h"
-#include "cmState.h"
-#include "cmStateDirectory.h"
-#include "cmStateSnapshot.h"
-#include "cmStateTypes.h"
-#include "cmStringAlgorithms.h"
-#include "cmSystemTools.h"
-#include "cmTarget.h"
-#include "cmTest.h"
-#include "cmake.h"
-
-namespace {
-
-std::vector<std::string> getConfigurations(const cmake* cm)
-{
-  std::vector<std::string> configurations;
-  const auto& makefiles = cm->GetGlobalGenerator()->GetMakefiles();
-  if (makefiles.empty()) {
-    return configurations;
-  }
-
-  return makefiles[0]->GetGeneratorConfigs(cmMakefile::IncludeEmptyConfig);
-}
-
-bool hasString(const Json::Value& v, const std::string& s)
-{
-  return !v.isNull() &&
-    std::any_of(v.begin(), v.end(),
-                [s](const Json::Value& i) { return i.asString() == s; });
-}
-
-template <class T>
-Json::Value fromStringList(const T& in)
-{
-  Json::Value result = Json::arrayValue;
-  for (std::string const& i : in) {
-    result.append(i);
-  }
-  return result;
-}
-
-} // namespace
-
-void cmGetCMakeInputs(const cmGlobalGenerator* gg,
-                      const std::string& sourceDir,
-                      const std::string& buildDir,
-                      std::vector<std::string>* internalFiles,
-                      std::vector<std::string>* explicitFiles,
-                      std::vector<std::string>* tmpFiles)
-{
-  const std::string cmakeRootDir = cmSystemTools::GetCMakeRoot() + '/';
-  auto const& makefiles = gg->GetMakefiles();
-  for (const auto& mf : makefiles) {
-    for (std::string const& lf : mf->GetListFiles()) {
-
-      const std::string startOfFile = lf.substr(0, cmakeRootDir.size());
-      const bool isInternal = (startOfFile == cmakeRootDir);
-      const bool isTemporary =
-        !isInternal && (cmHasPrefix(lf, buildDir + '/'));
-
-      std::string toAdd = lf;
-      if (!sourceDir.empty()) {
-        const std::string& relative =
-          cmSystemTools::RelativePath(sourceDir, lf);
-        if (toAdd.size() > relative.size()) {
-          toAdd = relative;
-        }
-      }
-
-      if (isInternal) {
-        if (internalFiles) {
-          internalFiles->push_back(std::move(toAdd));
-        }
-      } else {
-        if (isTemporary) {
-          if (tmpFiles) {
-            tmpFiles->push_back(std::move(toAdd));
-          }
-        } else {
-          if (explicitFiles) {
-            explicitFiles->push_back(std::move(toAdd));
-          }
-        }
-      }
-    }
-  }
-}
-
-Json::Value cmDumpCMakeInputs(const cmake* cm)
-{
-  const cmGlobalGenerator* gg = cm->GetGlobalGenerator();
-  const std::string& buildDir = cm->GetHomeOutputDirectory();
-  const std::string& sourceDir = cm->GetHomeDirectory();
-
-  std::vector<std::string> internalFiles;
-  std::vector<std::string> explicitFiles;
-  std::vector<std::string> tmpFiles;
-  cmGetCMakeInputs(gg, sourceDir, buildDir, &internalFiles, &explicitFiles,
-                   &tmpFiles);
-
-  Json::Value array = Json::arrayValue;
-
-  Json::Value tmp = Json::objectValue;
-  tmp[kIS_CMAKE_KEY] = true;
-  tmp[kIS_TEMPORARY_KEY] = false;
-  tmp[kSOURCES_KEY] = fromStringList(internalFiles);
-  array.append(tmp);
-
-  tmp = Json::objectValue;
-  tmp[kIS_CMAKE_KEY] = false;
-  tmp[kIS_TEMPORARY_KEY] = false;
-  tmp[kSOURCES_KEY] = fromStringList(explicitFiles);
-  array.append(tmp);
-
-  tmp = Json::objectValue;
-  tmp[kIS_CMAKE_KEY] = false;
-  tmp[kIS_TEMPORARY_KEY] = true;
-  tmp[kSOURCES_KEY] = fromStringList(tmpFiles);
-  array.append(tmp);
-
-  return array;
-}
-
-class LanguageData
-{
-public:
-  bool operator==(const LanguageData& other) const;
-
-  void SetDefines(const std::set<std::string>& defines);
-
-  bool IsGenerated = false;
-  std::string Language;
-  std::string Flags;
-  std::vector<std::string> Defines;
-  std::vector<std::pair<std::string, bool>> IncludePathList;
-};
-
-bool LanguageData::operator==(const LanguageData& other) const
-{
-  return Language == other.Language && Defines == other.Defines &&
-    Flags == other.Flags && IncludePathList == other.IncludePathList &&
-    IsGenerated == other.IsGenerated;
-}
-
-void LanguageData::SetDefines(const std::set<std::string>& defines)
-{
-  std::vector<std::string> result;
-  result.reserve(defines.size());
-  for (std::string const& i : defines) {
-    result.push_back(i);
-  }
-  std::sort(result.begin(), result.end());
-  Defines = std::move(result);
-}
-
-namespace std {
-
-template <>
-struct hash<LanguageData>
-{
-  std::size_t operator()(const LanguageData& in) const
-  {
-    using std::hash;
-    size_t result =
-      hash<std::string>()(in.Language) ^ hash<std::string>()(in.Flags);
-    for (auto const& i : in.IncludePathList) {
-      result = result ^
-        (hash<std::string>()(i.first) ^
-         (i.second ? std::numeric_limits<size_t>::max() : 0));
-    }
-    for (auto const& i : in.Defines) {
-      result = result ^ hash<std::string>()(i);
-    }
-    result =
-      result ^ (in.IsGenerated ? std::numeric_limits<size_t>::max() : 0);
-    return result;
-  }
-};
-
-} // namespace std
-
-static Json::Value DumpSourceFileGroup(const LanguageData& data,
-                                       const std::vector<std::string>& files,
-                                       const std::string& baseDir)
-{
-  Json::Value result = Json::objectValue;
-
-  if (!data.Language.empty()) {
-    result[kLANGUAGE_KEY] = data.Language;
-    if (!data.Flags.empty()) {
-      result[kCOMPILE_FLAGS_KEY] = data.Flags;
-    }
-    if (!data.IncludePathList.empty()) {
-      Json::Value includes = Json::arrayValue;
-      for (auto const& i : data.IncludePathList) {
-        Json::Value tmp = Json::objectValue;
-        tmp[kPATH_KEY] = i.first;
-        if (i.second) {
-          tmp[kIS_SYSTEM_KEY] = i.second;
-        }
-        includes.append(tmp);
-      }
-      result[kINCLUDE_PATH_KEY] = includes;
-    }
-    if (!data.Defines.empty()) {
-      result[kDEFINES_KEY] = fromStringList(data.Defines);
-    }
-  }
-
-  result[kIS_GENERATED_KEY] = data.IsGenerated;
-
-  Json::Value sourcesValue = Json::arrayValue;
-  for (auto const& i : files) {
-    const std::string relPath = cmSystemTools::RelativePath(baseDir, i);
-    sourcesValue.append(relPath.size() < i.size() ? relPath : i);
-  }
-
-  result[kSOURCES_KEY] = sourcesValue;
-  return result;
-}
-
-static Json::Value DumpSourceFilesList(
-  cmGeneratorTarget* target, const std::string& config,
-  const std::map<std::string, LanguageData>& languageDataMap)
-{
-  // Collect sourcefile groups:
-
-  std::vector<cmSourceFile*> files;
-  target->GetSourceFiles(files, config);
-
-  std::unordered_map<LanguageData, std::vector<std::string>> fileGroups;
-  for (cmSourceFile* file : files) {
-    LanguageData fileData;
-    fileData.Language = file->GetOrDetermineLanguage();
-    if (!fileData.Language.empty()) {
-      const LanguageData& ld = languageDataMap.at(fileData.Language);
-      cmLocalGenerator* lg = target->GetLocalGenerator();
-      cmGeneratorExpressionInterpreter genexInterpreter(lg, config, target,
-                                                        fileData.Language);
-
-      std::string compileFlags = ld.Flags;
-      const std::string COMPILE_FLAGS("COMPILE_FLAGS");
-      if (cmProp cflags = file->GetProperty(COMPILE_FLAGS)) {
-        lg->AppendFlags(compileFlags,
-                        genexInterpreter.Evaluate(*cflags, COMPILE_FLAGS));
-      }
-      const std::string COMPILE_OPTIONS("COMPILE_OPTIONS");
-      if (cmProp coptions = file->GetProperty(COMPILE_OPTIONS)) {
-        lg->AppendCompileOptions(
-          compileFlags, genexInterpreter.Evaluate(*coptions, COMPILE_OPTIONS));
-      }
-      fileData.Flags = compileFlags;
-
-      // Add include directories from source file properties.
-      std::vector<std::string> includes;
-
-      const std::string INCLUDE_DIRECTORIES("INCLUDE_DIRECTORIES");
-      if (cmProp cincludes = file->GetProperty(INCLUDE_DIRECTORIES)) {
-        const std::string& evaluatedIncludes =
-          genexInterpreter.Evaluate(*cincludes, INCLUDE_DIRECTORIES);
-        lg->AppendIncludeDirectories(includes, evaluatedIncludes, *file);
-
-        for (const auto& include : includes) {
-          fileData.IncludePathList.emplace_back(
-            include,
-            target->IsSystemIncludeDirectory(include, config,
-                                             fileData.Language));
-        }
-      }
-
-      fileData.IncludePathList.insert(fileData.IncludePathList.end(),
-                                      ld.IncludePathList.begin(),
-                                      ld.IncludePathList.end());
-
-      const std::string COMPILE_DEFINITIONS("COMPILE_DEFINITIONS");
-      std::set<std::string> defines;
-      if (cmProp defs = file->GetProperty(COMPILE_DEFINITIONS)) {
-        lg->AppendDefines(
-          defines, genexInterpreter.Evaluate(*defs, COMPILE_DEFINITIONS));
-      }
-
-      const std::string defPropName =
-        "COMPILE_DEFINITIONS_" + cmSystemTools::UpperCase(config);
-      if (cmProp config_defs = file->GetProperty(defPropName)) {
-        lg->AppendDefines(
-          defines,
-          genexInterpreter.Evaluate(*config_defs, COMPILE_DEFINITIONS));
-      }
-
-      defines.insert(ld.Defines.begin(), ld.Defines.end());
-
-      fileData.SetDefines(defines);
-    }
-
-    fileData.IsGenerated = file->GetIsGenerated();
-    std::vector<std::string>& groupFileList = fileGroups[fileData];
-    groupFileList.push_back(file->ResolveFullPath());
-  }
-
-  const std::string& baseDir = target->Makefile->GetCurrentSourceDirectory();
-  Json::Value result = Json::arrayValue;
-  for (auto const& it : fileGroups) {
-    Json::Value group = DumpSourceFileGroup(it.first, it.second, baseDir);
-    if (!group.isNull()) {
-      result.append(group);
-    }
-  }
-
-  return result;
-}
-
-static Json::Value DumpCTestInfo(cmLocalGenerator* lg, cmTest* testInfo,
-                                 const std::string& config)
-{
-  Json::Value result = Json::objectValue;
-  result[kCTEST_NAME] = testInfo->GetName();
-
-  // Concat command entries together. After the first should be the arguments
-  // for the command
-  std::string command;
-  for (auto const& cmd : testInfo->GetCommand()) {
-    command.append(cmd);
-    command.append(" ");
-  }
-
-  // Remove any config specific variables from the output.
-  result[kCTEST_COMMAND] =
-    cmGeneratorExpression::Evaluate(command, lg, config);
-
-  // Build up the list of properties that may have been specified
-  Json::Value properties = Json::arrayValue;
-  for (auto& prop : testInfo->GetProperties().GetList()) {
-    Json::Value entry = Json::objectValue;
-    entry[kKEY_KEY] = prop.first;
-
-    // Remove config variables from the value too.
-    entry[kVALUE_KEY] =
-      cmGeneratorExpression::Evaluate(prop.second, lg, config);
-    properties.append(entry);
-  }
-  result[kPROPERTIES_KEY] = properties;
-
-  return result;
-}
-
-static void DumpMakefileTests(cmLocalGenerator* lg, const std::string& config,
-                              Json::Value* result)
-{
-  auto mf = lg->GetMakefile();
-  std::vector<cmTest*> tests;
-  mf->GetTests(config, tests);
-  for (auto test : tests) {
-    Json::Value tmp = DumpCTestInfo(lg, test, config);
-    if (!tmp.isNull()) {
-      result->append(tmp);
-    }
-  }
-}
-
-static Json::Value DumpCTestProjectList(const cmake* cm,
-                                        std::string const& config)
-{
-  Json::Value result = Json::arrayValue;
-
-  auto globalGen = cm->GetGlobalGenerator();
-
-  for (const auto& projectIt : globalGen->GetProjectMap()) {
-    Json::Value pObj = Json::objectValue;
-    pObj[kNAME_KEY] = projectIt.first;
-
-    Json::Value tests = Json::arrayValue;
-
-    // Gather tests for every generator
-    for (const auto& lg : projectIt.second) {
-      // Make sure they're generated.
-      lg->GenerateTestFiles();
-      DumpMakefileTests(lg, config, &tests);
-    }
-
-    pObj[kCTEST_INFO] = tests;
-
-    result.append(pObj);
-  }
-
-  return result;
-}
-
-static Json::Value DumpCTestConfiguration(const cmake* cm,
-                                          const std::string& config)
-{
-  Json::Value result = Json::objectValue;
-  result[kNAME_KEY] = config;
-
-  result[kPROJECTS_KEY] = DumpCTestProjectList(cm, config);
-
-  return result;
-}
-
-static Json::Value DumpCTestConfigurationsList(const cmake* cm)
-{
-  Json::Value result = Json::arrayValue;
-
-  for (const std::string& c : getConfigurations(cm)) {
-    result.append(DumpCTestConfiguration(cm, c));
-  }
-
-  return result;
-}
-
-Json::Value cmDumpCTestInfo(const cmake* cm)
-{
-  Json::Value result = Json::objectValue;
-  result[kCONFIGURATIONS_KEY] = DumpCTestConfigurationsList(cm);
-  return result;
-}
-
-static Json::Value DumpTarget(cmGeneratorTarget* target,
-                              const std::string& config)
-{
-  cmLocalGenerator* lg = target->GetLocalGenerator();
-
-  const cmStateEnums::TargetType type = target->GetType();
-  const std::string typeName = cmState::GetTargetTypeName(type);
-
-  Json::Value ttl = Json::arrayValue;
-  ttl.append("EXECUTABLE");
-  ttl.append("STATIC_LIBRARY");
-  ttl.append("SHARED_LIBRARY");
-  ttl.append("MODULE_LIBRARY");
-  ttl.append("OBJECT_LIBRARY");
-  ttl.append("UTILITY");
-  ttl.append("INTERFACE_LIBRARY");
-
-  if (!hasString(ttl, typeName) || target->IsImported()) {
-    return Json::Value();
-  }
-
-  Json::Value result = Json::objectValue;
-  result[kNAME_KEY] = target->GetName();
-  result[kIS_GENERATOR_PROVIDED_KEY] =
-    target->Target->GetIsGeneratorProvided();
-  result[kTYPE_KEY] = typeName;
-  result[kSOURCE_DIRECTORY_KEY] = lg->GetCurrentSourceDirectory();
-  result[kBUILD_DIRECTORY_KEY] = lg->GetCurrentBinaryDirectory();
-
-  if (type == cmStateEnums::INTERFACE_LIBRARY) {
-    return result;
-  }
-
-  result[kFULL_NAME_KEY] = target->GetFullName(config);
-
-  if (target->Target->GetHaveInstallRule()) {
-    result[kHAS_INSTALL_RULE] = true;
-
-    Json::Value installPaths = Json::arrayValue;
-    for (const auto& installGenerator :
-         target->Makefile->GetInstallGenerators()) {
-      auto installTargetGenerator =
-        dynamic_cast<cmInstallTargetGenerator*>(installGenerator.get());
-      if (installTargetGenerator != nullptr &&
-          installTargetGenerator->GetTarget()->Target == target->Target) {
-        auto dest = installTargetGenerator->GetDestination(config);
-
-        std::string installPath;
-        if (!dest.empty() && cmSystemTools::FileIsFullPath(dest)) {
-          installPath = dest;
-        } else {
-          installPath = cmStrCat(
-            target->Makefile->GetSafeDefinition("CMAKE_INSTALL_PREFIX"), '/',
-            dest);
-        }
-
-        installPaths.append(installPath);
-      }
-    }
-
-    result[kINSTALL_PATHS] = installPaths;
-  }
-
-  if (target->HaveWellDefinedOutputFiles()) {
-    Json::Value artifacts = Json::arrayValue;
-    artifacts.append(
-      target->GetFullPath(config, cmStateEnums::RuntimeBinaryArtifact));
-    if (target->HasImportLibrary(config)) {
-      artifacts.append(
-        target->GetFullPath(config, cmStateEnums::ImportLibraryArtifact));
-    }
-    if (target->IsDLLPlatform()) {
-      const cmGeneratorTarget::OutputInfo* output =
-        target->GetOutputInfo(config);
-      if (output && !output->PdbDir.empty()) {
-        artifacts.append(output->PdbDir + '/' + target->GetPDBName(config));
-      }
-    }
-    result[kARTIFACTS_KEY] = artifacts;
-
-    result[kLINKER_LANGUAGE_KEY] = target->GetLinkerLanguage(config);
-
-    std::string linkLibs;
-    std::string linkFlags;
-    std::string linkLanguageFlags;
-    std::string frameworkPath;
-    std::string linkPath;
-    cmLinkLineComputer linkLineComputer(lg,
-                                        lg->GetStateSnapshot().GetDirectory());
-    lg->GetTargetFlags(&linkLineComputer, config, linkLibs, linkLanguageFlags,
-                       linkFlags, frameworkPath, linkPath, target);
-
-    linkLibs = cmTrimWhitespace(linkLibs);
-    linkFlags = cmTrimWhitespace(linkFlags);
-    linkLanguageFlags = cmTrimWhitespace(linkLanguageFlags);
-    frameworkPath = cmTrimWhitespace(frameworkPath);
-    linkPath = cmTrimWhitespace(linkPath);
-
-    if (!cmTrimWhitespace(linkLibs).empty()) {
-      result[kLINK_LIBRARIES_KEY] = linkLibs;
-    }
-    if (!cmTrimWhitespace(linkFlags).empty()) {
-      result[kLINK_FLAGS_KEY] = linkFlags;
-    }
-    if (!cmTrimWhitespace(linkLanguageFlags).empty()) {
-      result[kLINK_LANGUAGE_FLAGS_KEY] = linkLanguageFlags;
-    }
-    if (!frameworkPath.empty()) {
-      result[kFRAMEWORK_PATH_KEY] = frameworkPath;
-    }
-    if (!linkPath.empty()) {
-      result[kLINK_PATH_KEY] = linkPath;
-    }
-    const std::string sysroot =
-      lg->GetMakefile()->GetSafeDefinition("CMAKE_SYSROOT");
-    if (!sysroot.empty()) {
-      result[kSYSROOT_KEY] = sysroot;
-    }
-  }
-
-  std::set<std::string> languages;
-  target->GetLanguages(languages, config);
-  std::map<std::string, LanguageData> languageDataMap;
-
-  for (std::string const& lang : languages) {
-    LanguageData& ld = languageDataMap[lang];
-    ld.Language = lang;
-    lg->GetTargetCompileFlags(target, config, lang, ld.Flags);
-    std::set<std::string> defines;
-    lg->GetTargetDefines(target, config, lang, defines);
-    ld.SetDefines(defines);
-    std::vector<std::string> includePathList;
-    lg->GetIncludeDirectories(includePathList, target, lang, config);
-    for (std::string const& i : includePathList) {
-      ld.IncludePathList.emplace_back(
-        i, target->IsSystemIncludeDirectory(i, config, lang));
-    }
-  }
-
-  Json::Value sourceGroupsValue =
-    DumpSourceFilesList(target, config, languageDataMap);
-  if (!sourceGroupsValue.empty()) {
-    result[kFILE_GROUPS_KEY] = sourceGroupsValue;
-  }
-
-  return result;
-}
-
-static Json::Value DumpTargetsList(
-  const std::vector<cmLocalGenerator*>& generators, const std::string& config)
-{
-  Json::Value result = Json::arrayValue;
-
-  std::vector<cmGeneratorTarget*> targetList;
-  for (auto const& lgIt : generators) {
-    cm::append(targetList, lgIt->GetGeneratorTargets());
-  }
-  std::sort(targetList.begin(), targetList.end());
-
-  for (cmGeneratorTarget* target : targetList) {
-    Json::Value tmp = DumpTarget(target, config);
-    if (!tmp.isNull()) {
-      result.append(tmp);
-    }
-  }
-
-  return result;
-}
-
-static Json::Value DumpProjectList(const cmake* cm, std::string const& config)
-{
-  Json::Value result = Json::arrayValue;
-
-  auto globalGen = cm->GetGlobalGenerator();
-
-  for (auto const& projectIt : globalGen->GetProjectMap()) {
-    Json::Value pObj = Json::objectValue;
-    pObj[kNAME_KEY] = projectIt.first;
-
-    // All Projects must have at least one local generator
-    assert(!projectIt.second.empty());
-    const cmLocalGenerator* lg = projectIt.second.at(0);
-
-    // Project structure information:
-    const cmMakefile* mf = lg->GetMakefile();
-    auto minVersion = mf->GetSafeDefinition("CMAKE_MINIMUM_REQUIRED_VERSION");
-    pObj[kMINIMUM_CMAKE_VERSION] = minVersion;
-    pObj[kSOURCE_DIRECTORY_KEY] = mf->GetCurrentSourceDirectory();
-    pObj[kBUILD_DIRECTORY_KEY] = mf->GetCurrentBinaryDirectory();
-    pObj[kTARGETS_KEY] = DumpTargetsList(projectIt.second, config);
-
-    // For a project-level install rule it might be defined in any of its
-    // associated generators.
-    bool hasInstallRule = false;
-    for (const auto generator : projectIt.second) {
-      for (const auto& installGen :
-           generator->GetMakefile()->GetInstallGenerators()) {
-        if (!dynamic_cast<cmInstallSubdirectoryGenerator*>(installGen.get())) {
-          hasInstallRule = true;
-          break;
-        }
-      }
-
-      if (hasInstallRule) {
-        break;
-      }
-    }
-
-    pObj[kHAS_INSTALL_RULE] = hasInstallRule;
-
-    result.append(pObj);
-  }
-
-  return result;
-}
-
-static Json::Value DumpConfiguration(const cmake* cm,
-                                     const std::string& config)
-{
-  Json::Value result = Json::objectValue;
-  result[kNAME_KEY] = config;
-
-  result[kPROJECTS_KEY] = DumpProjectList(cm, config);
-
-  return result;
-}
-
-static Json::Value DumpConfigurationsList(const cmake* cm)
-{
-  Json::Value result = Json::arrayValue;
-
-  for (std::string const& c : getConfigurations(cm)) {
-    result.append(DumpConfiguration(cm, c));
-  }
-
-  return result;
-}
-
-Json::Value cmDumpCodeModel(const cmake* cm)
-{
-  Json::Value result = Json::objectValue;
-  result[kCONFIGURATIONS_KEY] = DumpConfigurationsList(cm);
-  return result;
-}
diff --git a/Source/cmJsonObjects.h b/Source/cmJsonObjects.h
deleted file mode 100644
index 80a4834..0000000
--- a/Source/cmJsonObjects.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <string>
-#include <vector>
-
-#include <cm3p/json/value.h>
-
-class cmake;
-class cmGlobalGenerator;
-
-extern void cmGetCMakeInputs(const cmGlobalGenerator* gg,
-                             const std::string& sourceDir,
-                             const std::string& buildDir,
-                             std::vector<std::string>* internalFiles,
-                             std::vector<std::string>* explicitFiles,
-                             std::vector<std::string>* tmpFiles);
-
-extern Json::Value cmDumpCodeModel(const cmake* cm);
-extern Json::Value cmDumpCTestInfo(const cmake* cm);
-extern Json::Value cmDumpCMakeInputs(const cmake* cm);
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 4e6010c..b7ad78a 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -3918,10 +3918,35 @@ cmSourceFile* AddCustomCommand(
     cc->SetJobPool(job_pool);
     file->SetCustomCommand(std::move(cc));
 
-    mf->AddSourceOutputs(file, outputs, byproducts);
+    lg.AddSourceOutputs(file, outputs, byproducts);
   }
   return file;
 }
+
+bool AnyOutputMatches(const std::string& name,
+                      const std::vector<std::string>& outputs)
+{
+  for (std::string const& output : outputs) {
+    std::string::size_type pos = output.rfind(name);
+    // If the output matches exactly
+    if (pos != std::string::npos && pos == output.size() - name.size() &&
+        (pos == 0 || output[pos - 1] == '/')) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool AnyTargetCommandOutputMatches(
+  const std::string& name, const std::vector<cmCustomCommand>& commands)
+{
+  for (cmCustomCommand const& command : commands) {
+    if (AnyOutputMatches(name, command.GetByproducts())) {
+      return true;
+    }
+  }
+  return false;
+}
 }
 
 namespace detail {
@@ -3937,8 +3962,6 @@ void AddCustomCommandToTarget(cmLocalGenerator& lg,
                               const std::string& job_pool,
                               bool command_expand_lists, bool stdPipesUTF8)
 {
-  cmMakefile* mf = lg.GetMakefile();
-
   // Always create the byproduct sources and mark them generated.
   CreateGeneratedSources(lg, byproducts, origin, lfbt);
 
@@ -3964,7 +3987,7 @@ void AddCustomCommandToTarget(cmLocalGenerator& lg,
       break;
   }
 
-  mf->AddTargetByproducts(target, byproducts);
+  lg.AddTargetByproducts(target, byproducts);
 }
 
 cmSourceFile* AddCustomCommandToOutput(
@@ -3996,7 +4019,7 @@ void AppendCustomCommandToOutput(cmLocalGenerator& lg,
                                  const cmCustomCommandLines& commandLines)
 {
   // Lookup an existing command.
-  if (cmSourceFile* sf = lg.GetMakefile()->GetSourceFileWithOutput(output)) {
+  if (cmSourceFile* sf = lg.GetSourceFileWithOutput(output)) {
     if (cmCustomCommand* cc = sf->GetCustomCommand()) {
       cc->AppendCommands(commandLines);
       cc->AppendDepends(depends);
@@ -4008,7 +4031,7 @@ void AppendCustomCommandToOutput(cmLocalGenerator& lg,
   // No existing command found.
   lg.GetCMakeInstance()->IssueMessage(
     MessageType::FATAL_ERROR,
-    cmStrCat("Attempt to append to output\n  ", output,
+    cmStrCat("Attempt to APPEND to custom command with output\n  ", output,
              "\nwhich is not already a custom command output."),
     lfbt);
 }
@@ -4040,7 +4063,7 @@ void AddUtilityCommand(cmLocalGenerator& lg, const cmListFileBacktrace& lfbt,
     /*replace=*/false, escapeOldStyle, uses_terminal, command_expand_lists,
     /*depfile=*/"", job_pool, stdPipesUTF8);
   if (rule) {
-    lg.GetMakefile()->AddTargetByproducts(target, byproducts);
+    lg.AddTargetByproducts(target, byproducts);
   }
 
   if (!force.NameCMP0049.empty()) {
@@ -4088,3 +4111,166 @@ std::vector<std::string> ComputeISPCExtraObjects(
   return computedObjects;
 }
 }
+
+cmSourcesWithOutput cmLocalGenerator::GetSourcesWithOutput(
+  const std::string& name) const
+{
+  // Linear search?  Also see GetSourceFileWithOutput for detail.
+  if (!cmSystemTools::FileIsFullPath(name)) {
+    cmSourcesWithOutput sources;
+    sources.Target = this->LinearGetTargetWithOutput(name);
+    sources.Source = this->LinearGetSourceFileWithOutput(
+      name, cmSourceOutputKind::OutputOrByproduct, sources.SourceIsByproduct);
+    return sources;
+  }
+  // Otherwise we use an efficient lookup map.
+  auto o = this->OutputToSource.find(name);
+  if (o != this->OutputToSource.end()) {
+    return o->second.Sources;
+  }
+  return {};
+}
+
+cmSourceFile* cmLocalGenerator::GetSourceFileWithOutput(
+  const std::string& name, cmSourceOutputKind kind) const
+{
+  // If the queried path is not absolute we use the backward compatible
+  // linear-time search for an output with a matching suffix.
+  if (!cmSystemTools::FileIsFullPath(name)) {
+    bool byproduct = false;
+    return this->LinearGetSourceFileWithOutput(name, kind, byproduct);
+  }
+  // Otherwise we use an efficient lookup map.
+  auto o = this->OutputToSource.find(name);
+  if (o != this->OutputToSource.end() &&
+      (!o->second.Sources.SourceIsByproduct ||
+       kind == cmSourceOutputKind::OutputOrByproduct)) {
+    // Source file could also be null pointer for example if we found the
+    // byproduct of a utility target, a PRE_BUILD, PRE_LINK, or POST_BUILD
+    // command of a target, or a not yet created custom command.
+    return o->second.Sources.Source;
+  }
+  return nullptr;
+}
+
+void cmLocalGenerator::AddTargetByproducts(
+  cmTarget* target, const std::vector<std::string>& byproducts)
+{
+  for (std::string const& o : byproducts) {
+    this->UpdateOutputToSourceMap(o, target);
+  }
+}
+
+void cmLocalGenerator::AddSourceOutputs(
+  cmSourceFile* source, const std::vector<std::string>& outputs,
+  const std::vector<std::string>& byproducts)
+{
+  for (std::string const& o : outputs) {
+    this->UpdateOutputToSourceMap(o, source, false);
+  }
+  for (std::string const& o : byproducts) {
+    this->UpdateOutputToSourceMap(o, source, true);
+  }
+}
+
+void cmLocalGenerator::UpdateOutputToSourceMap(std::string const& byproduct,
+                                               cmTarget* target)
+{
+  SourceEntry entry;
+  entry.Sources.Target = target;
+
+  auto pr = this->OutputToSource.emplace(byproduct, entry);
+  if (!pr.second) {
+    SourceEntry& current = pr.first->second;
+    // Has the target already been set?
+    if (!current.Sources.Target) {
+      current.Sources.Target = target;
+    } else {
+      // Multiple custom commands/targets produce the same output (source file
+      // or target).  See also comment in other UpdateOutputToSourceMap
+      // overload.
+      //
+      // TODO: Warn the user about this case.
+    }
+  }
+}
+
+void cmLocalGenerator::UpdateOutputToSourceMap(std::string const& output,
+                                               cmSourceFile* source,
+                                               bool byproduct)
+{
+  SourceEntry entry;
+  entry.Sources.Source = source;
+  entry.Sources.SourceIsByproduct = byproduct;
+
+  auto pr = this->OutputToSource.emplace(output, entry);
+  if (!pr.second) {
+    SourceEntry& current = pr.first->second;
+    // Outputs take precedence over byproducts
+    if (!current.Sources.Source ||
+        (current.Sources.SourceIsByproduct && !byproduct)) {
+      current.Sources.Source = source;
+      current.Sources.SourceIsByproduct = false;
+    } else {
+      // Multiple custom commands produce the same output but may
+      // be attached to a different source file (MAIN_DEPENDENCY).
+      // LinearGetSourceFileWithOutput would return the first one,
+      // so keep the mapping for the first one.
+      //
+      // TODO: Warn the user about this case.  However, the VS 8 generator
+      // triggers it for separate generate.stamp rules in ZERO_CHECK and
+      // individual targets.
+    }
+  }
+}
+
+cmTarget* cmLocalGenerator::LinearGetTargetWithOutput(
+  const std::string& name) const
+{
+  // We go through the ordered vector of targets to get reproducible results
+  // should multiple names match.
+  for (cmTarget* t : this->Makefile->GetOrderedTargets()) {
+    // Does the output of any command match the source file name?
+    if (AnyTargetCommandOutputMatches(name, t->GetPreBuildCommands())) {
+      return t;
+    }
+    if (AnyTargetCommandOutputMatches(name, t->GetPreLinkCommands())) {
+      return t;
+    }
+    if (AnyTargetCommandOutputMatches(name, t->GetPostBuildCommands())) {
+      return t;
+    }
+  }
+  return nullptr;
+}
+
+cmSourceFile* cmLocalGenerator::LinearGetSourceFileWithOutput(
+  const std::string& name, cmSourceOutputKind kind, bool& byproduct) const
+{
+  // Outputs take precedence over byproducts.
+  byproduct = false;
+  cmSourceFile* fallback = nullptr;
+
+  // Look through all the source files that have custom commands and see if the
+  // custom command has the passed source file as an output.
+  for (const auto& src : this->Makefile->GetSourceFiles()) {
+    // Does this source file have a custom command?
+    if (src->GetCustomCommand()) {
+      // Does the output of the custom command match the source file name?
+      if (AnyOutputMatches(name, src->GetCustomCommand()->GetOutputs())) {
+        // Return the first matching output.
+        return src.get();
+      }
+      if (kind == cmSourceOutputKind::OutputOrByproduct) {
+        if (AnyOutputMatches(name, src->GetCustomCommand()->GetByproducts())) {
+          // Do not return the source yet as there might be a matching output.
+          fallback = src.get();
+        }
+      }
+    }
+  }
+
+  // Did we find a byproduct?
+  byproduct = fallback != nullptr;
+  return fallback;
+}
diff --git a/Source/cmLocalGenerator.h b/Source/cmLocalGenerator.h
index 22d3599..162e70f 100644
--- a/Source/cmLocalGenerator.h
+++ b/Source/cmLocalGenerator.h
@@ -36,6 +36,24 @@ class cmState;
 class cmTarget;
 class cmake;
 
+/** Flag if byproducts shall also be considered.  */
+enum class cmSourceOutputKind
+{
+  OutputOnly,
+  OutputOrByproduct
+};
+
+/** Target and source file which have a specific output.  */
+struct cmSourcesWithOutput
+{
+  /** Target with byproduct.  */
+  cmTarget* Target = nullptr;
+
+  /** Source file with output or byproduct.  */
+  cmSourceFile* Source = nullptr;
+  bool SourceIsByproduct = false;
+};
+
 /** \class cmLocalGenerator
  * \brief Create required build files for a directory.
  *
@@ -337,6 +355,34 @@ public:
     bool command_expand_lists = false, const std::string& job_pool = "",
     bool stdPipesUTF8 = false);
 
+  /**
+   * Add target byproducts.
+   */
+  void AddTargetByproducts(cmTarget* target,
+                           const std::vector<std::string>& byproducts);
+
+  /**
+   * Add source file outputs.
+   */
+  void AddSourceOutputs(cmSourceFile* source,
+                        const std::vector<std::string>& outputs,
+                        const std::vector<std::string>& byproducts);
+
+  /**
+   * Return the target if the provided source name is a byproduct of a utility
+   * target or a PRE_BUILD, PRE_LINK, or POST_BUILD command.
+   * Return the source file which has the provided source name as output.
+   */
+  cmSourcesWithOutput GetSourcesWithOutput(const std::string& name) const;
+
+  /**
+   * Is there a source file that has the provided source name as an output?
+   * If so then return it.
+   */
+  cmSourceFile* GetSourceFileWithOutput(
+    const std::string& name,
+    cmSourceOutputKind kind = cmSourceOutputKind::OutputOnly) const;
+
   std::string GetProjectName() const;
 
   /** Compute the language used to compile the given source file.  */
@@ -532,6 +578,33 @@ protected:
   bool BackwardsCompatibilityFinal;
 
 private:
+  /**
+   * See LinearGetSourceFileWithOutput for background information
+   */
+  cmTarget* LinearGetTargetWithOutput(const std::string& name) const;
+
+  /**
+   * Generalized old version of GetSourceFileWithOutput kept for
+   * backward-compatibility. It implements a linear search and supports
+   * relative file paths. It is used as a fall back by GetSourceFileWithOutput
+   * and GetSourcesWithOutput.
+   */
+  cmSourceFile* LinearGetSourceFileWithOutput(const std::string& name,
+                                              cmSourceOutputKind kind,
+                                              bool& byproduct) const;
+  struct SourceEntry
+  {
+    cmSourcesWithOutput Sources;
+  };
+
+  // A map for fast output to input look up.
+  using OutputToSourceMap = std::unordered_map<std::string, SourceEntry>;
+  OutputToSourceMap OutputToSource;
+
+  void UpdateOutputToSourceMap(std::string const& byproduct, cmTarget* target);
+  void UpdateOutputToSourceMap(std::string const& output, cmSourceFile* source,
+                               bool byproduct);
+
   void AddSharedFlags(std::string& flags, const std::string& lang,
                       bool shared);
   bool GetShouldUseOldFlags(bool shared, const std::string& lang) const;
diff --git a/Source/cmLocalNinjaGenerator.cxx b/Source/cmLocalNinjaGenerator.cxx
index ad782ee..ce85320 100644
--- a/Source/cmLocalNinjaGenerator.cxx
+++ b/Source/cmLocalNinjaGenerator.cxx
@@ -22,7 +22,9 @@
 #include "cmGlobalNinjaGenerator.h"
 #include "cmLocalGenerator.h"
 #include "cmMakefile.h"
+#include "cmMessageType.h"
 #include "cmNinjaTargetGenerator.h"
+#include "cmPolicies.h"
 #include "cmProperty.h"
 #include "cmRulePlaceholderExpander.h"
 #include "cmSourceFile.h"
@@ -573,7 +575,20 @@ void cmLocalNinjaGenerator::WriteCustomCommandBuildStatement(
     return;
   }
 
-  cmCustomCommandGenerator ccg(*cc, config, this);
+  bool transformDepfile = false;
+  auto cmp0116 = this->GetPolicyStatus(cmPolicies::CMP0116);
+  switch (cmp0116) {
+    case cmPolicies::OLD:
+    case cmPolicies::WARN:
+      break;
+    case cmPolicies::REQUIRED_IF_USED:
+    case cmPolicies::REQUIRED_ALWAYS:
+    case cmPolicies::NEW:
+      transformDepfile = true;
+      break;
+  }
+
+  cmCustomCommandGenerator ccg(*cc, config, this, transformDepfile);
 
   const std::vector<std::string>& outputs = ccg.GetOutputs();
   const std::vector<std::string>& byproducts = ccg.GetByproducts();
@@ -623,10 +638,36 @@ void cmLocalNinjaGenerator::WriteCustomCommandBuildStatement(
     cmCryptoHash hash(cmCryptoHash::AlgoSHA256);
     customStep += hash.HashString(ninjaOutputs[0]).substr(0, 7);
 
+    std::string depfile = cc->GetDepfile();
+    if (!depfile.empty()) {
+      switch (cmp0116) {
+        case cmPolicies::WARN:
+          if (this->GetCurrentBinaryDirectory() !=
+                this->GetBinaryDirectory() ||
+              this->Makefile->PolicyOptionalWarningEnabled(
+                "CMAKE_POLICY_WARNING_CMP0116")) {
+            this->GetCMakeInstance()->IssueMessage(
+              MessageType::AUTHOR_WARNING,
+              cmPolicies::GetPolicyWarning(cmPolicies::CMP0116),
+              cc->GetBacktrace());
+          }
+          CM_FALLTHROUGH;
+        case cmPolicies::OLD:
+          break;
+        case cmPolicies::REQUIRED_IF_USED:
+        case cmPolicies::REQUIRED_ALWAYS:
+        case cmPolicies::NEW:
+          cmSystemTools::MakeDirectory(
+            cmStrCat(this->GetBinaryDirectory(), "/CMakeFiles/d"));
+          depfile = ccg.GetInternalDepfile();
+          break;
+      }
+    }
+
     gg->WriteCustomCommandBuild(
       this->BuildCommandLine(cmdLines, customStep),
       this->ConstructComment(ccg), "Custom command for " + ninjaOutputs[0],
-      cc->GetDepfile(), cc->GetJobPool(), cc->GetUsesTerminal(),
+      depfile, cc->GetJobPool(), cc->GetUsesTerminal(),
       /*restat*/ !symbolic || !byproducts.empty(), ninjaOutputs, config,
       ninjaDeps, orderOnlyDeps);
   }
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 0e4f888..22594bd 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -939,8 +939,6 @@ void cmMakefile::DoGenerate(cmLocalGenerator& lg)
     action.Value(lg, action.Backtrace);
   }
   this->GeneratorActionsInvoked = true;
-  this->DelayedOutputFiles.clear();
-  this->DelayedOutputFilesHaveGenex = false;
 
   // go through all configured files and see which ones still exist.
   // we don't want cmake to re-run if a configured file is created and deleted
@@ -1104,7 +1102,7 @@ cmTarget* cmMakefile::AddCustomCommandToTarget(
   }
 
   // Always create the byproduct sources and mark them generated.
-  this->CreateGeneratedByproducts(byproducts);
+  this->CreateGeneratedOutputs(byproducts);
 
   // Strings could be moved into the callback function with C++14.
   cm::optional<std::string> commentStr = MakeOptionalString(comment);
@@ -1163,7 +1161,7 @@ void cmMakefile::AddCustomCommandToOutput(
 
   // Always create the output sources and mark them generated.
   this->CreateGeneratedOutputs(outputs);
-  this->CreateGeneratedByproducts(byproducts);
+  this->CreateGeneratedOutputs(byproducts);
 
   // Strings could be moved into the callback function with C++14.
   cm::optional<std::string> commentStr = MakeOptionalString(comment);
@@ -1247,16 +1245,11 @@ void cmMakefile::AddCustomCommandOldStyle(
   }
 }
 
-bool cmMakefile::AppendCustomCommandToOutput(
+void cmMakefile::AppendCustomCommandToOutput(
   const std::string& output, const std::vector<std::string>& depends,
   const cmImplicitDependsList& implicit_depends,
   const cmCustomCommandLines& commandLines)
 {
-  // Check as good as we can if there will be a command for this output.
-  if (!this->MightHaveCustomCommand(output)) {
-    return false;
-  }
-
   // Validate custom commands.
   if (this->ValidateCustomCommand(commandLines)) {
     // Dispatch command creation to allow generator expressions in outputs.
@@ -1267,8 +1260,6 @@ bool cmMakefile::AppendCustomCommandToOutput(
                                             implicit_depends, commandLines);
       });
   }
-
-  return true;
 }
 
 cmUtilityOutput cmMakefile::GetUtilityOutput(cmTarget* target)
@@ -1313,7 +1304,7 @@ cmTarget* cmMakefile::AddUtilityCommand(
   this->GetOrCreateGeneratedSource(force.Name);
 
   // Always create the byproduct sources and mark them generated.
-  this->CreateGeneratedByproducts(byproducts);
+  this->CreateGeneratedOutputs(byproducts);
 
   // Strings could be moved into the callback function with C++14.
   cm::optional<std::string> commentStr = MakeOptionalString(comment);
@@ -2154,213 +2145,6 @@ cmTarget* cmMakefile::AddNewUtilityTarget(const std::string& utilityName,
 }
 
 namespace {
-bool AnyOutputMatches(const std::string& name,
-                      const std::vector<std::string>& outputs)
-{
-  for (std::string const& output : outputs) {
-    std::string::size_type pos = output.rfind(name);
-    // If the output matches exactly
-    if (pos != std::string::npos && pos == output.size() - name.size() &&
-        (pos == 0 || output[pos - 1] == '/')) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool AnyTargetCommandOutputMatches(
-  const std::string& name, const std::vector<cmCustomCommand>& commands)
-{
-  for (cmCustomCommand const& command : commands) {
-    if (AnyOutputMatches(name, command.GetByproducts())) {
-      return true;
-    }
-  }
-  return false;
-}
-}
-
-cmTarget* cmMakefile::LinearGetTargetWithOutput(const std::string& name) const
-{
-  // We go through the ordered vector of targets to get reproducible results
-  // should multiple names match.
-  for (cmTarget* t : this->OrderedTargets) {
-    // Does the output of any command match the source file name?
-    if (AnyTargetCommandOutputMatches(name, t->GetPreBuildCommands())) {
-      return t;
-    }
-    if (AnyTargetCommandOutputMatches(name, t->GetPreLinkCommands())) {
-      return t;
-    }
-    if (AnyTargetCommandOutputMatches(name, t->GetPostBuildCommands())) {
-      return t;
-    }
-  }
-  return nullptr;
-}
-
-cmSourceFile* cmMakefile::LinearGetSourceFileWithOutput(
-  const std::string& name, cmSourceOutputKind kind, bool& byproduct) const
-{
-  // Outputs take precedence over byproducts.
-  byproduct = false;
-  cmSourceFile* fallback = nullptr;
-
-  // Look through all the source files that have custom commands and see if the
-  // custom command has the passed source file as an output.
-  for (const auto& src : this->SourceFiles) {
-    // Does this source file have a custom command?
-    if (src->GetCustomCommand()) {
-      // Does the output of the custom command match the source file name?
-      if (AnyOutputMatches(name, src->GetCustomCommand()->GetOutputs())) {
-        // Return the first matching output.
-        return src.get();
-      }
-      if (kind == cmSourceOutputKind::OutputOrByproduct) {
-        if (AnyOutputMatches(name, src->GetCustomCommand()->GetByproducts())) {
-          // Do not return the source yet as there might be a matching output.
-          fallback = src.get();
-        }
-      }
-    }
-  }
-
-  // Did we find a byproduct?
-  byproduct = fallback != nullptr;
-  return fallback;
-}
-
-cmSourcesWithOutput cmMakefile::GetSourcesWithOutput(
-  const std::string& name) const
-{
-  // Linear search?  Also see GetSourceFileWithOutput for detail.
-  if (!cmSystemTools::FileIsFullPath(name)) {
-    cmSourcesWithOutput sources;
-    sources.Target = this->LinearGetTargetWithOutput(name);
-    sources.Source = this->LinearGetSourceFileWithOutput(
-      name, cmSourceOutputKind::OutputOrByproduct, sources.SourceIsByproduct);
-    return sources;
-  }
-  // Otherwise we use an efficient lookup map.
-  auto o = this->OutputToSource.find(name);
-  if (o != this->OutputToSource.end()) {
-    return o->second.Sources;
-  }
-  return {};
-}
-
-cmSourceFile* cmMakefile::GetSourceFileWithOutput(
-  const std::string& name, cmSourceOutputKind kind) const
-{
-  // If the queried path is not absolute we use the backward compatible
-  // linear-time search for an output with a matching suffix.
-  if (!cmSystemTools::FileIsFullPath(name)) {
-    bool byproduct = false;
-    return this->LinearGetSourceFileWithOutput(name, kind, byproduct);
-  }
-  // Otherwise we use an efficient lookup map.
-  auto o = this->OutputToSource.find(name);
-  if (o != this->OutputToSource.end() &&
-      (!o->second.Sources.SourceIsByproduct ||
-       kind == cmSourceOutputKind::OutputOrByproduct)) {
-    // Source file could also be null pointer for example if we found the
-    // byproduct of a utility target, a PRE_BUILD, PRE_LINK, or POST_BUILD
-    // command of a target, or a not yet created custom command.
-    return o->second.Sources.Source;
-  }
-  return nullptr;
-}
-
-bool cmMakefile::MightHaveCustomCommand(const std::string& name) const
-{
-  if (this->DelayedOutputFilesHaveGenex ||
-      cmGeneratorExpression::Find(name) != std::string::npos) {
-    // Could be more restrictive, but for now we assume that there could always
-    // be a match when generator expressions are involved.
-    return true;
-  }
-  // Also see LinearGetSourceFileWithOutput.
-  if (!cmSystemTools::FileIsFullPath(name)) {
-    return AnyOutputMatches(name, this->DelayedOutputFiles);
-  }
-  // Otherwise we use an efficient lookup map.
-  auto o = this->OutputToSource.find(name);
-  if (o != this->OutputToSource.end()) {
-    return o->second.SourceMightBeOutput;
-  }
-  return false;
-}
-
-void cmMakefile::AddTargetByproducts(
-  cmTarget* target, const std::vector<std::string>& byproducts)
-{
-  for (std::string const& o : byproducts) {
-    this->UpdateOutputToSourceMap(o, target);
-  }
-}
-
-void cmMakefile::AddSourceOutputs(cmSourceFile* source,
-                                  const std::vector<std::string>& outputs,
-                                  const std::vector<std::string>& byproducts)
-{
-  for (std::string const& o : outputs) {
-    this->UpdateOutputToSourceMap(o, source, false);
-  }
-  for (std::string const& o : byproducts) {
-    this->UpdateOutputToSourceMap(o, source, true);
-  }
-}
-
-void cmMakefile::UpdateOutputToSourceMap(std::string const& byproduct,
-                                         cmTarget* target)
-{
-  SourceEntry entry;
-  entry.Sources.Target = target;
-
-  auto pr = this->OutputToSource.emplace(byproduct, entry);
-  if (!pr.second) {
-    SourceEntry& current = pr.first->second;
-    // Has the target already been set?
-    if (!current.Sources.Target) {
-      current.Sources.Target = target;
-    } else {
-      // Multiple custom commands/targets produce the same output (source file
-      // or target).  See also comment in other UpdateOutputToSourceMap
-      // overload.
-      //
-      // TODO: Warn the user about this case.
-    }
-  }
-}
-
-void cmMakefile::UpdateOutputToSourceMap(std::string const& output,
-                                         cmSourceFile* source, bool byproduct)
-{
-  SourceEntry entry;
-  entry.Sources.Source = source;
-  entry.Sources.SourceIsByproduct = byproduct;
-  entry.SourceMightBeOutput = !byproduct;
-
-  auto pr = this->OutputToSource.emplace(output, entry);
-  if (!pr.second) {
-    SourceEntry& current = pr.first->second;
-    // Outputs take precedence over byproducts
-    if (!current.Sources.Source ||
-        (current.Sources.SourceIsByproduct && !byproduct)) {
-      current.Sources.Source = source;
-      current.Sources.SourceIsByproduct = false;
-      current.SourceMightBeOutput = true;
-    } else {
-      // Multiple custom commands produce the same output but may
-      // be attached to a different source file (MAIN_DEPENDENCY).
-      // LinearGetSourceFileWithOutput would return the first one,
-      // so keep the mapping for the first one.
-      //
-      // TODO: Warn the user about this case.  However, the VS 8 generator
-      // triggers it for separate generate.stamp rules in ZERO_CHECK and
-      // individual targets.
-    }
-  }
 }
 
 #if !defined(CMAKE_BOOTSTRAP)
@@ -3675,38 +3459,10 @@ void cmMakefile::CreateGeneratedOutputs(
   for (std::string const& o : outputs) {
     if (cmGeneratorExpression::Find(o) == std::string::npos) {
       this->GetOrCreateGeneratedSource(o);
-      this->AddDelayedOutput(o);
-    } else {
-      this->DelayedOutputFilesHaveGenex = true;
     }
   }
 }
 
-void cmMakefile::CreateGeneratedByproducts(
-  const std::vector<std::string>& byproducts)
-{
-  for (std::string const& o : byproducts) {
-    if (cmGeneratorExpression::Find(o) == std::string::npos) {
-      this->GetOrCreateGeneratedSource(o);
-    }
-  }
-}
-
-void cmMakefile::AddDelayedOutput(std::string const& output)
-{
-  // Note that this vector might contain the output names in a different order
-  // than in source file iteration order.
-  this->DelayedOutputFiles.push_back(output);
-
-  SourceEntry entry;
-  entry.SourceMightBeOutput = true;
-
-  auto pr = this->OutputToSource.emplace(output, entry);
-  if (!pr.second) {
-    pr.first->second.SourceMightBeOutput = true;
-  }
-}
-
 void cmMakefile::AddTargetObject(std::string const& tgtName,
                                  std::string const& objFile)
 {
@@ -4670,7 +4426,7 @@ bool cmMakefile::SetPolicy(cmPolicies::PolicyID id,
 
   // Deprecate old policies, especially those that require a lot
   // of code to maintain the old behavior.
-  if (status == cmPolicies::OLD && id <= cmPolicies::CMP0072 &&
+  if (status == cmPolicies::OLD && id <= cmPolicies::CMP0075 &&
       !(this->GetCMakeInstance()->GetIsInTryCompile() &&
         (
           // Policies set by cmCoreTryCompile::TryCompileCode.
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index c7940fb..ecc6aab 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -59,24 +59,6 @@ class cmTestGenerator;
 class cmVariableWatch;
 class cmake;
 
-/** Flag if byproducts shall also be considered.  */
-enum class cmSourceOutputKind
-{
-  OutputOnly,
-  OutputOrByproduct
-};
-
-/** Target and source file which have a specific output.  */
-struct cmSourcesWithOutput
-{
-  /** Target with byproduct.  */
-  cmTarget* Target = nullptr;
-
-  /** Source file with output or byproduct.  */
-  cmSourceFile* Source = nullptr;
-  bool SourceIsByproduct = false;
-};
-
 /** A type-safe wrapper for a string representing a directory id.  */
 class cmDirectoryId
 {
@@ -225,25 +207,12 @@ public:
                                 const std::string& source,
                                 const cmCustomCommandLines& commandLines,
                                 const char* comment);
-  bool AppendCustomCommandToOutput(
+  void AppendCustomCommandToOutput(
     const std::string& output, const std::vector<std::string>& depends,
     const cmImplicitDependsList& implicit_depends,
     const cmCustomCommandLines& commandLines);
 
   /**
-   * Add target byproducts.
-   */
-  void AddTargetByproducts(cmTarget* target,
-                           const std::vector<std::string>& byproducts);
-
-  /**
-   * Add source file outputs.
-   */
-  void AddSourceOutputs(cmSourceFile* source,
-                        const std::vector<std::string>& outputs,
-                        const std::vector<std::string>& byproducts);
-
-  /**
    * Add a define flag to the build.
    */
   void AddDefineFlag(std::string const& definition);
@@ -753,20 +722,10 @@ public:
     return this->SourceFiles;
   }
 
-  /**
-   * Return the target if the provided source name is a byproduct of a utility
-   * target or a PRE_BUILD, PRE_LINK, or POST_BUILD command.
-   * Return the source file which has the provided source name as output.
-   */
-  cmSourcesWithOutput GetSourcesWithOutput(const std::string& name) const;
-
-  /**
-   * Is there a source file that has the provided source name as an output?
-   * If so then return it.
-   */
-  cmSourceFile* GetSourceFileWithOutput(
-    const std::string& name,
-    cmSourceOutputKind kind = cmSourceOutputKind::OutputOnly) const;
+  std::vector<cmTarget*> const& GetOrderedTargets() const
+  {
+    return this->OrderedTargets;
+  }
 
   //! Add a new cmTest to the list of tests for this makefile.
   cmTest* CreateTest(const std::string& testName);
@@ -983,8 +942,7 @@ protected:
   mutable cmTargetMap Targets;
   std::map<std::string, std::string> AliasTargets;
 
-  using TargetsVec = std::vector<cmTarget*>;
-  TargetsVec OrderedTargets;
+  std::vector<cmTarget*> OrderedTargets;
 
   std::vector<std::unique_ptr<cmSourceFile>> SourceFiles;
 
@@ -1129,48 +1087,9 @@ private:
   bool ValidateCustomCommand(const cmCustomCommandLines& commandLines) const;
 
   void CreateGeneratedOutputs(const std::vector<std::string>& outputs);
-  void CreateGeneratedByproducts(const std::vector<std::string>& byproducts);
 
   std::vector<BT<GeneratorAction>> GeneratorActions;
   bool GeneratorActionsInvoked = false;
-  bool DelayedOutputFilesHaveGenex = false;
-  std::vector<std::string> DelayedOutputFiles;
-
-  void AddDelayedOutput(std::string const& output);
-
-  /**
-   * See LinearGetSourceFileWithOutput for background information
-   */
-  cmTarget* LinearGetTargetWithOutput(const std::string& name) const;
-
-  /**
-   * Generalized old version of GetSourceFileWithOutput kept for
-   * backward-compatibility. It implements a linear search and supports
-   * relative file paths. It is used as a fall back by GetSourceFileWithOutput
-   * and GetSourcesWithOutput.
-   */
-  cmSourceFile* LinearGetSourceFileWithOutput(const std::string& name,
-                                              cmSourceOutputKind kind,
-                                              bool& byproduct) const;
-
-  struct SourceEntry
-  {
-    cmSourcesWithOutput Sources;
-    bool SourceMightBeOutput = false;
-  };
-
-  // A map for fast output to input look up.
-  using OutputToSourceMap = std::unordered_map<std::string, SourceEntry>;
-  OutputToSourceMap OutputToSource;
-
-  void UpdateOutputToSourceMap(std::string const& byproduct, cmTarget* target);
-  void UpdateOutputToSourceMap(std::string const& output, cmSourceFile* source,
-                               bool byproduct);
-
-  /**
-   * Return if the provided source file might have a custom command.
-   */
-  bool MightHaveCustomCommand(const std::string& name) const;
 
   bool CheckSystemVars;
   bool CheckCMP0000;
diff --git a/Source/cmPipeConnection.cxx b/Source/cmPipeConnection.cxx
deleted file mode 100644
index 1eede13..0000000
--- a/Source/cmPipeConnection.cxx
+++ /dev/null
@@ -1,71 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmPipeConnection.h"
-
-#include <utility>
-
-#include "cmServer.h"
-
-cmPipeConnection::cmPipeConnection(std::string name,
-                                   cmConnectionBufferStrategy* bufferStrategy)
-  : cmEventBasedConnection(bufferStrategy)
-  , PipeName(std::move(name))
-{
-}
-
-void cmPipeConnection::Connect(uv_stream_t* server)
-{
-  if (this->WriteStream.get()) {
-    // Accept and close all pipes but the first:
-    cm::uv_pipe_ptr rejectPipe;
-
-    rejectPipe.init(*this->Server->GetLoop(), 0);
-    uv_accept(server, rejectPipe);
-
-    return;
-  }
-
-  cm::uv_pipe_ptr ClientPipe;
-  ClientPipe.init(*this->Server->GetLoop(), 0,
-                  static_cast<cmEventBasedConnection*>(this));
-
-  if (uv_accept(server, ClientPipe) != 0) {
-    return;
-  }
-
-  uv_read_start(ClientPipe, on_alloc_buffer, on_read);
-  WriteStream = std::move(ClientPipe);
-  Server->OnConnected(this);
-}
-
-bool cmPipeConnection::OnServeStart(std::string* errorMessage)
-{
-  this->ServerPipe.init(*this->Server->GetLoop(), 0,
-                        static_cast<cmEventBasedConnection*>(this));
-
-  int r;
-  if ((r = uv_pipe_bind(this->ServerPipe, this->PipeName.c_str())) != 0) {
-    *errorMessage = std::string("Internal Error with ") + this->PipeName +
-      ": " + uv_err_name(r);
-    return false;
-  }
-
-  if ((r = uv_listen(this->ServerPipe, 1, on_new_connection)) != 0) {
-    *errorMessage = std::string("Internal Error listening on ") +
-      this->PipeName + ": " + uv_err_name(r);
-    return false;
-  }
-
-  return cmConnection::OnServeStart(errorMessage);
-}
-
-bool cmPipeConnection::OnConnectionShuttingDown()
-{
-  if (this->WriteStream.get()) {
-    this->WriteStream->data = nullptr;
-  }
-
-  this->ServerPipe.reset();
-
-  return cmEventBasedConnection::OnConnectionShuttingDown();
-}
diff --git a/Source/cmPipeConnection.h b/Source/cmPipeConnection.h
deleted file mode 100644
index 1215716..0000000
--- a/Source/cmPipeConnection.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <string>
-
-#include <cm3p/uv.h>
-
-#include "cmConnection.h"
-#include "cmUVHandlePtr.h"
-
-class cmPipeConnection : public cmEventBasedConnection
-{
-public:
-  cmPipeConnection(std::string name,
-                   cmConnectionBufferStrategy* bufferStrategy = nullptr);
-
-  bool OnServeStart(std::string* pString) override;
-
-  bool OnConnectionShuttingDown() override;
-
-  void Connect(uv_stream_t* server) override;
-
-private:
-  const std::string PipeName;
-  cm::uv_pipe_ptr ServerPipe;
-};
diff --git a/Source/cmPolicies.h b/Source/cmPolicies.h
index 18ce9c3..5ef0ff7 100644
--- a/Source/cmPolicies.h
+++ b/Source/cmPolicies.h
@@ -340,7 +340,12 @@ class cmMakefile;
          3, 19, 0, cmPolicies::WARN)                                          \
   SELECT(POLICY, CMP0114,                                                     \
          "ExternalProject step targets fully adopt their steps.", 3, 19, 0,   \
-         cmPolicies::WARN)
+         cmPolicies::WARN)                                                    \
+  SELECT(POLICY, CMP0115, "Source file extensions must be explicit.", 3, 20,  \
+         0, cmPolicies::WARN)                                                 \
+  SELECT(POLICY, CMP0116,                                                     \
+         "Ninja generators transform DEPFILEs from add_custom_command().", 3, \
+         20, 0, cmPolicies::WARN)
 
 #define CM_SELECT_ID(F, A1, A2, A3, A4, A5, A6) F(A1)
 #define CM_FOR_EACH_POLICY_ID(POLICY)                                         \
diff --git a/Source/cmQtAutoMocUic.cxx b/Source/cmQtAutoMocUic.cxx
index 9cb172b..b27bb88 100644
--- a/Source/cmQtAutoMocUic.cxx
+++ b/Source/cmQtAutoMocUic.cxx
@@ -15,6 +15,7 @@
 #include <vector>
 
 #include <cm/memory>
+#include <cm/optional>
 #include <cm/string_view>
 #include <cmext/algorithm>
 
@@ -26,7 +27,6 @@
 #include "cmCryptoHash.h"
 #include "cmFileTime.h"
 #include "cmGccDepfileReader.h"
-#include "cmGccDepfileReaderTypes.h"
 #include "cmGeneratedFileStream.h"
 #include "cmQtAutoGen.h"
 #include "cmQtAutoGenerator.h"
@@ -2841,14 +2841,14 @@ bool cmQtAutoMocUicT::CreateDirectories()
 std::vector<std::string> cmQtAutoMocUicT::dependenciesFromDepFile(
   const char* filePath)
 {
-  cmGccDepfileContent content = cmReadGccDepfile(filePath);
-  if (content.empty()) {
+  auto const content = cmReadGccDepfile(filePath);
+  if (!content || content->empty()) {
     return {};
   }
 
   // Moc outputs a depfile with exactly one rule.
   // Discard the rule and return the dependencies.
-  return content.front().paths;
+  return content->front().paths;
 }
 
 void cmQtAutoMocUicT::Abort(bool error)
diff --git a/Source/cmServer.cxx b/Source/cmServer.cxx
deleted file mode 100644
index 7f97406..0000000
--- a/Source/cmServer.cxx
+++ /dev/null
@@ -1,570 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmServer.h"
-
-#include <algorithm>
-#include <cassert>
-#include <csignal>
-#include <cstdint>
-#include <iostream>
-#include <mutex>
-#include <utility>
-
-#include <cm/memory>
-#include <cm/shared_mutex>
-
-#include <cm3p/json/reader.h>
-#include <cm3p/json/writer.h>
-
-#include "cmsys/FStream.hxx"
-
-#include "cmConnection.h"
-#include "cmFileMonitor.h"
-#include "cmJsonObjectDictionary.h"
-#include "cmServerDictionary.h"
-#include "cmServerProtocol.h"
-#include "cmSystemTools.h"
-#include "cmake.h"
-
-void on_signal(uv_signal_t* signal, int signum)
-{
-  auto conn = static_cast<cmServerBase*>(signal->data);
-  conn->OnSignal(signum);
-}
-
-static void on_walk_to_shutdown(uv_handle_t* handle, void* arg)
-{
-  (void)arg;
-  assert(uv_is_closing(handle));
-  if (!uv_is_closing(handle)) {
-    uv_close(handle, &cmEventBasedConnection::on_close);
-  }
-}
-
-class cmServer::DebugInfo
-{
-public:
-  DebugInfo()
-    : StartTime(uv_hrtime())
-  {
-  }
-
-  bool PrintStatistics = false;
-
-  std::string OutputFile;
-  uint64_t StartTime;
-};
-
-cmServer::cmServer(cmConnection* conn, bool supportExperimental)
-  : cmServerBase(conn)
-  , SupportExperimental(supportExperimental)
-{
-  // Register supported protocols:
-  this->RegisterProtocol(cm::make_unique<cmServerProtocol1>());
-}
-
-cmServer::~cmServer()
-{
-  Close();
-}
-
-void cmServer::ProcessRequest(cmConnection* connection,
-                              const std::string& input)
-{
-  Json::Reader reader;
-  Json::Value value;
-  if (!reader.parse(input, value)) {
-    this->WriteParseError(connection, "Failed to parse JSON input.");
-    return;
-  }
-
-  std::unique_ptr<DebugInfo> debug;
-  Json::Value debugValue = value["debug"];
-  if (!debugValue.isNull()) {
-    debug = cm::make_unique<DebugInfo>();
-    debug->OutputFile = debugValue["dumpToFile"].asString();
-    debug->PrintStatistics = debugValue["showStats"].asBool();
-  }
-
-  const cmServerRequest request(this, connection, value[kTYPE_KEY].asString(),
-                                value[kCOOKIE_KEY].asString(), value);
-
-  if (request.Type.empty()) {
-    cmServerResponse response(request);
-    response.SetError("No type given in request.");
-    this->WriteResponse(connection, response, nullptr);
-    return;
-  }
-
-  cmSystemTools::SetMessageCallback(
-    [&request](const std::string& msg, const char* title) {
-      reportMessage(msg, title, request);
-    });
-
-  if (this->Protocol) {
-    this->Protocol->CMakeInstance()->SetProgressCallback(
-      [&request](const std::string& msg, float prog) {
-        reportProgress(msg, prog, request);
-      });
-    this->WriteResponse(connection, this->Protocol->Process(request),
-                        debug.get());
-  } else {
-    this->WriteResponse(connection, this->SetProtocolVersion(request),
-                        debug.get());
-  }
-}
-
-void cmServer::RegisterProtocol(std::unique_ptr<cmServerProtocol> protocol)
-{
-  if (protocol->IsExperimental() && !this->SupportExperimental) {
-    protocol.reset();
-    return;
-  }
-  auto version = protocol->ProtocolVersion();
-  assert(version.first >= 0);
-  assert(version.second >= 0);
-  auto it = std::find_if(
-    this->SupportedProtocols.begin(), this->SupportedProtocols.end(),
-    [version](const std::unique_ptr<cmServerProtocol>& p) {
-      return p->ProtocolVersion() == version;
-    });
-  if (it == this->SupportedProtocols.end()) {
-    this->SupportedProtocols.push_back(std::move(protocol));
-  }
-}
-
-void cmServer::PrintHello(cmConnection* connection) const
-{
-  Json::Value hello = Json::objectValue;
-  hello[kTYPE_KEY] = "hello";
-
-  Json::Value& protocolVersions = hello[kSUPPORTED_PROTOCOL_VERSIONS] =
-    Json::arrayValue;
-
-  for (auto const& proto : this->SupportedProtocols) {
-    auto version = proto->ProtocolVersion();
-    Json::Value tmp = Json::objectValue;
-    tmp[kMAJOR_KEY] = version.first;
-    tmp[kMINOR_KEY] = version.second;
-    if (proto->IsExperimental()) {
-      tmp[kIS_EXPERIMENTAL_KEY] = true;
-    }
-    protocolVersions.append(tmp);
-  }
-
-  this->WriteJsonObject(connection, hello, nullptr);
-}
-
-void cmServer::reportProgress(const std::string& msg, float progress,
-                              const cmServerRequest& request)
-{
-  if (progress < 0.0f || progress > 1.0f) {
-    request.ReportMessage(msg, "");
-  } else {
-    request.ReportProgress(0, static_cast<int>(progress * 1000), 1000, msg);
-  }
-}
-
-void cmServer::reportMessage(const std::string& msg, const char* title,
-                             const cmServerRequest& request)
-{
-  std::string titleString;
-  if (title) {
-    titleString = title;
-  }
-  request.ReportMessage(msg, titleString);
-}
-
-cmServerResponse cmServer::SetProtocolVersion(const cmServerRequest& request)
-{
-  if (request.Type != kHANDSHAKE_TYPE) {
-    return request.ReportError("Waiting for type \"" + kHANDSHAKE_TYPE +
-                               "\".");
-  }
-
-  Json::Value requestedProtocolVersion = request.Data[kPROTOCOL_VERSION_KEY];
-  if (requestedProtocolVersion.isNull()) {
-    return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
-                               "\" is required for \"" + kHANDSHAKE_TYPE +
-                               "\".");
-  }
-
-  if (!requestedProtocolVersion.isObject()) {
-    return request.ReportError("\"" + kPROTOCOL_VERSION_KEY +
-                               "\" must be a JSON object.");
-  }
-
-  Json::Value majorValue = requestedProtocolVersion[kMAJOR_KEY];
-  if (!majorValue.isInt()) {
-    return request.ReportError("\"" + kMAJOR_KEY +
-                               "\" must be set and an integer.");
-  }
-
-  Json::Value minorValue = requestedProtocolVersion[kMINOR_KEY];
-  if (!minorValue.isNull() && !minorValue.isInt()) {
-    return request.ReportError("\"" + kMINOR_KEY +
-                               "\" must be unset or an integer.");
-  }
-
-  const int major = majorValue.asInt();
-  const int minor = minorValue.isNull() ? -1 : minorValue.asInt();
-  if (major < 0) {
-    return request.ReportError("\"" + kMAJOR_KEY + "\" must be >= 0.");
-  }
-  if (!minorValue.isNull() && minor < 0) {
-    return request.ReportError("\"" + kMINOR_KEY +
-                               "\" must be >= 0 when set.");
-  }
-
-  this->Protocol =
-    cmServer::FindMatchingProtocol(this->SupportedProtocols, major, minor);
-  if (!this->Protocol) {
-    return request.ReportError("Protocol version not supported.");
-  }
-
-  std::string errorMessage;
-  if (!this->Protocol->Activate(this, request, &errorMessage)) {
-    this->Protocol = nullptr;
-    return request.ReportError("Failed to activate protocol version: " +
-                               errorMessage);
-  }
-  return request.Reply(Json::objectValue);
-}
-
-bool cmServer::Serve(std::string* errorMessage)
-{
-  if (this->SupportedProtocols.empty()) {
-    *errorMessage =
-      "No protocol versions defined. Maybe you need --experimental?";
-    return false;
-  }
-  assert(!this->Protocol);
-
-  return cmServerBase::Serve(errorMessage);
-}
-
-cmFileMonitor* cmServer::FileMonitor() const
-{
-  return fileMonitor.get();
-}
-
-void cmServer::WriteJsonObject(const Json::Value& jsonValue,
-                               const DebugInfo* debug) const
-{
-  cm::shared_lock<cm::shared_mutex> lock(ConnectionsMutex);
-  for (auto& connection : this->Connections) {
-    WriteJsonObject(connection.get(), jsonValue, debug);
-  }
-}
-
-void cmServer::WriteJsonObject(cmConnection* connection,
-                               const Json::Value& jsonValue,
-                               const DebugInfo* debug) const
-{
-  Json::FastWriter writer;
-
-  auto beforeJson = uv_hrtime();
-  std::string result = writer.write(jsonValue);
-
-  if (debug) {
-    Json::Value copy = jsonValue;
-    if (debug->PrintStatistics) {
-      Json::Value stats = Json::objectValue;
-      auto endTime = uv_hrtime();
-
-      stats["jsonSerialization"] = double(endTime - beforeJson) / 1000000.0;
-      stats["totalTime"] = double(endTime - debug->StartTime) / 1000000.0;
-      stats["size"] = static_cast<int>(result.size());
-      if (!debug->OutputFile.empty()) {
-        stats["dumpFile"] = debug->OutputFile;
-      }
-
-      copy["zzzDebug"] = stats;
-
-      result = writer.write(copy); // Update result to include debug info
-    }
-
-    if (!debug->OutputFile.empty()) {
-      cmsys::ofstream myfile(debug->OutputFile.c_str());
-      myfile << result;
-    }
-  }
-
-  connection->WriteData(result);
-}
-
-cmServerProtocol* cmServer::FindMatchingProtocol(
-  const std::vector<std::unique_ptr<cmServerProtocol>>& protocols, int major,
-  int minor)
-{
-  cmServerProtocol* bestMatch = nullptr;
-  for (const auto& protocol : protocols) {
-    auto version = protocol->ProtocolVersion();
-    if (major != version.first) {
-      continue;
-    }
-    if (minor == version.second) {
-      return protocol.get();
-    }
-    if (!bestMatch || bestMatch->ProtocolVersion().second < version.second) {
-      bestMatch = protocol.get();
-    }
-  }
-  return minor < 0 ? bestMatch : nullptr;
-}
-
-void cmServer::WriteProgress(const cmServerRequest& request, int min,
-                             int current, int max,
-                             const std::string& message) const
-{
-  assert(min <= current && current <= max);
-  assert(message.length() != 0);
-
-  Json::Value obj = Json::objectValue;
-  obj[kTYPE_KEY] = kPROGRESS_TYPE;
-  obj[kREPLY_TO_KEY] = request.Type;
-  obj[kCOOKIE_KEY] = request.Cookie;
-  obj[kPROGRESS_MESSAGE_KEY] = message;
-  obj[kPROGRESS_MINIMUM_KEY] = min;
-  obj[kPROGRESS_MAXIMUM_KEY] = max;
-  obj[kPROGRESS_CURRENT_KEY] = current;
-
-  this->WriteJsonObject(request.Connection, obj, nullptr);
-}
-
-void cmServer::WriteMessage(const cmServerRequest& request,
-                            const std::string& message,
-                            const std::string& title) const
-{
-  if (message.empty()) {
-    return;
-  }
-
-  Json::Value obj = Json::objectValue;
-  obj[kTYPE_KEY] = kMESSAGE_TYPE;
-  obj[kREPLY_TO_KEY] = request.Type;
-  obj[kCOOKIE_KEY] = request.Cookie;
-  obj[kMESSAGE_KEY] = message;
-  if (!title.empty()) {
-    obj[kTITLE_KEY] = title;
-  }
-
-  WriteJsonObject(request.Connection, obj, nullptr);
-}
-
-void cmServer::WriteParseError(cmConnection* connection,
-                               const std::string& message) const
-{
-  Json::Value obj = Json::objectValue;
-  obj[kTYPE_KEY] = kERROR_TYPE;
-  obj[kERROR_MESSAGE_KEY] = message;
-  obj[kREPLY_TO_KEY] = "";
-  obj[kCOOKIE_KEY] = "";
-
-  this->WriteJsonObject(connection, obj, nullptr);
-}
-
-void cmServer::WriteSignal(const std::string& name,
-                           const Json::Value& data) const
-{
-  assert(data.isObject());
-  Json::Value obj = data;
-  obj[kTYPE_KEY] = kSIGNAL_TYPE;
-  obj[kREPLY_TO_KEY] = "";
-  obj[kCOOKIE_KEY] = "";
-  obj[kNAME_KEY] = name;
-
-  WriteJsonObject(obj, nullptr);
-}
-
-void cmServer::WriteResponse(cmConnection* connection,
-                             const cmServerResponse& response,
-                             const DebugInfo* debug) const
-{
-  assert(response.IsComplete());
-
-  Json::Value obj = response.Data();
-  obj[kCOOKIE_KEY] = response.Cookie;
-  obj[kTYPE_KEY] = response.IsError() ? kERROR_TYPE : kREPLY_TYPE;
-  obj[kREPLY_TO_KEY] = response.Type;
-  if (response.IsError()) {
-    obj[kERROR_MESSAGE_KEY] = response.ErrorMessage();
-  }
-
-  this->WriteJsonObject(connection, obj, debug);
-}
-
-void cmServer::OnConnected(cmConnection* connection)
-{
-  PrintHello(connection);
-}
-
-void cmServer::OnServeStart()
-{
-  cmServerBase::OnServeStart();
-  fileMonitor = std::make_shared<cmFileMonitor>(GetLoop());
-}
-
-void cmServer::StartShutDown()
-{
-  if (fileMonitor) {
-    fileMonitor->StopMonitoring();
-    fileMonitor.reset();
-  }
-  cmServerBase::StartShutDown();
-}
-
-static void __start_thread(void* arg)
-{
-  auto server = static_cast<cmServerBase*>(arg);
-  std::string error;
-  bool success = server->Serve(&error);
-  if (!success || !error.empty()) {
-    std::cerr << "Error during serve: " << error << std::endl;
-  }
-}
-
-bool cmServerBase::StartServeThread()
-{
-  ServeThreadRunning = true;
-  uv_thread_create(&ServeThread, __start_thread, this);
-  return true;
-}
-
-static void __shutdownThread(uv_async_t* arg)
-{
-  auto server = static_cast<cmServerBase*>(arg->data);
-  server->StartShutDown();
-}
-
-bool cmServerBase::Serve(std::string* errorMessage)
-{
-#ifndef NDEBUG
-  uv_thread_t blank_thread_t = {};
-  assert(uv_thread_equal(&blank_thread_t, &ServeThreadId));
-  ServeThreadId = uv_thread_self();
-#endif
-
-  errorMessage->clear();
-
-  ShutdownSignal.init(Loop, __shutdownThread, this);
-
-  SIGINTHandler.init(Loop, this);
-  SIGHUPHandler.init(Loop, this);
-
-  SIGINTHandler.start(&on_signal, SIGINT);
-  SIGHUPHandler.start(&on_signal, SIGHUP);
-
-  OnServeStart();
-
-  {
-    cm::shared_lock<cm::shared_mutex> lock(ConnectionsMutex);
-    for (auto& connection : Connections) {
-      if (!connection->OnServeStart(errorMessage)) {
-        return false;
-      }
-    }
-  }
-
-  if (uv_run(&Loop, UV_RUN_DEFAULT) != 0) {
-    // It is important we don't ever let the event loop exit with open handles
-    // at best this is a memory leak, but it can also introduce race conditions
-    // which can hang the program.
-    assert(false && "Event loop stopped in unclean state.");
-
-    *errorMessage = "Internal Error: Event loop stopped in unclean state.";
-    return false;
-  }
-
-  return true;
-}
-
-void cmServerBase::OnConnected(cmConnection*)
-{
-}
-
-void cmServerBase::OnServeStart()
-{
-}
-
-void cmServerBase::StartShutDown()
-{
-  ShutdownSignal.reset();
-  SIGINTHandler.reset();
-  SIGHUPHandler.reset();
-
-  {
-    std::unique_lock<cm::shared_mutex> lock(ConnectionsMutex);
-    for (auto& connection : Connections) {
-      connection->OnConnectionShuttingDown();
-    }
-    Connections.clear();
-  }
-
-  uv_walk(&Loop, on_walk_to_shutdown, nullptr);
-}
-
-bool cmServerBase::OnSignal(int signum)
-{
-  (void)signum;
-  StartShutDown();
-  return true;
-}
-
-cmServerBase::cmServerBase(cmConnection* connection)
-{
-  auto err = uv_loop_init(&Loop);
-  (void)err;
-  Loop.data = this;
-  assert(err == 0);
-
-  AddNewConnection(connection);
-}
-
-void cmServerBase::Close()
-{
-  if (Loop.data) {
-    if (ServeThreadRunning) {
-      this->ShutdownSignal.send();
-      uv_thread_join(&ServeThread);
-    }
-
-    uv_loop_close(&Loop);
-    Loop.data = nullptr;
-  }
-}
-cmServerBase::~cmServerBase()
-{
-  Close();
-}
-
-void cmServerBase::AddNewConnection(cmConnection* ownedConnection)
-{
-  {
-    std::unique_lock<cm::shared_mutex> lock(ConnectionsMutex);
-    Connections.emplace_back(ownedConnection);
-  }
-  ownedConnection->SetServer(this);
-}
-
-uv_loop_t* cmServerBase::GetLoop()
-{
-  return &Loop;
-}
-
-void cmServerBase::OnDisconnect(cmConnection* pConnection)
-{
-  auto pred = [pConnection](const std::unique_ptr<cmConnection>& m) {
-    return m.get() == pConnection;
-  };
-  {
-    std::unique_lock<cm::shared_mutex> lock(ConnectionsMutex);
-    Connections.erase(
-      std::remove_if(Connections.begin(), Connections.end(), pred),
-      Connections.end());
-  }
-
-  if (Connections.empty()) {
-    this->ShutdownSignal.send();
-  }
-}
diff --git a/Source/cmServer.h b/Source/cmServer.h
deleted file mode 100644
index 9543329..0000000
--- a/Source/cmServer.h
+++ /dev/null
@@ -1,162 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include <cm/shared_mutex>
-
-#include <cm3p/json/value.h>
-#include <cm3p/uv.h>
-
-#include "cmUVHandlePtr.h"
-
-class cmConnection;
-class cmFileMonitor;
-class cmServerProtocol;
-class cmServerRequest;
-class cmServerResponse;
-
-/***
- * This essentially hold and manages a libuv event queue and responds to
- * messages
- * on any of its connections.
- */
-class cmServerBase
-{
-public:
-  cmServerBase(cmConnection* connection);
-  virtual ~cmServerBase();
-
-  virtual void AddNewConnection(cmConnection* ownedConnection);
-
-  /***
-   * The main override responsible for tailoring behavior towards
-   * whatever the given server is supposed to do
-   *
-   * This should almost always be called by the given connections
-   * directly.
-   *
-   * @param connection The connection the request was received on
-   * @param request The actual request
-   */
-  virtual void ProcessRequest(cmConnection* connection,
-                              const std::string& request) = 0;
-  virtual void OnConnected(cmConnection* connection);
-
-  /***
-   * Start a dedicated thread. If this is used to start the server, it will
-   * join on the
-   * servers dtor.
-   */
-  virtual bool StartServeThread();
-  virtual bool Serve(std::string* errorMessage);
-
-  virtual void OnServeStart();
-  virtual void StartShutDown();
-
-  virtual bool OnSignal(int signum);
-  uv_loop_t* GetLoop();
-  void Close();
-  void OnDisconnect(cmConnection* pConnection);
-
-protected:
-  mutable cm::shared_mutex ConnectionsMutex;
-  std::vector<std::unique_ptr<cmConnection>> Connections;
-
-  bool ServeThreadRunning = false;
-  uv_thread_t ServeThread;
-  cm::uv_async_ptr ShutdownSignal;
-#ifndef NDEBUG
-public:
-  // When the server starts it will mark down it's current thread ID,
-  // which is useful in other contexts to just assert that operations
-  // are performed on that same thread.
-  uv_thread_t ServeThreadId = {};
-
-protected:
-#endif
-
-  uv_loop_t Loop;
-
-  cm::uv_signal_ptr SIGINTHandler;
-  cm::uv_signal_ptr SIGHUPHandler;
-};
-
-class cmServer : public cmServerBase
-{
-public:
-  class DebugInfo;
-
-  cmServer(cmConnection* conn, bool supportExperimental);
-  ~cmServer() override;
-
-  cmServer(cmServer const&) = delete;
-  cmServer& operator=(cmServer const&) = delete;
-
-  bool Serve(std::string* errorMessage) override;
-
-  cmFileMonitor* FileMonitor() const;
-
-private:
-  void RegisterProtocol(std::unique_ptr<cmServerProtocol> protocol);
-
-  // Callbacks from cmServerConnection:
-
-  void ProcessRequest(cmConnection* connection,
-                      const std::string& request) override;
-  std::shared_ptr<cmFileMonitor> fileMonitor;
-
-public:
-  void OnServeStart() override;
-
-  void StartShutDown() override;
-
-public:
-  void OnConnected(cmConnection* connection) override;
-
-private:
-  static void reportProgress(const std::string& msg, float progress,
-                             const cmServerRequest& request);
-  static void reportMessage(const std::string& msg, const char* title,
-                            const cmServerRequest& request);
-
-  // Handle requests:
-  cmServerResponse SetProtocolVersion(const cmServerRequest& request);
-
-  void PrintHello(cmConnection* connection) const;
-
-  // Write responses:
-  void WriteProgress(const cmServerRequest& request, int min, int current,
-                     int max, const std::string& message) const;
-  void WriteMessage(const cmServerRequest& request, const std::string& message,
-                    const std::string& title) const;
-  void WriteResponse(cmConnection* connection,
-                     const cmServerResponse& response,
-                     const DebugInfo* debug) const;
-  void WriteParseError(cmConnection* connection,
-                       const std::string& message) const;
-  void WriteSignal(const std::string& name, const Json::Value& obj) const;
-
-  void WriteJsonObject(Json::Value const& jsonValue,
-                       const DebugInfo* debug) const;
-
-  void WriteJsonObject(cmConnection* connection, Json::Value const& jsonValue,
-                       const DebugInfo* debug) const;
-
-  static cmServerProtocol* FindMatchingProtocol(
-    const std::vector<std::unique_ptr<cmServerProtocol>>& protocols, int major,
-    int minor);
-
-  const bool SupportExperimental;
-
-  cmServerProtocol* Protocol = nullptr;
-  std::vector<std::unique_ptr<cmServerProtocol>> SupportedProtocols;
-
-  friend class cmServerProtocol;
-  friend class cmServerRequest;
-};
diff --git a/Source/cmServerConnection.cxx b/Source/cmServerConnection.cxx
deleted file mode 100644
index b4f41a0..0000000
--- a/Source/cmServerConnection.cxx
+++ /dev/null
@@ -1,165 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmConfigure.h"
-
-#include "cmServerConnection.h"
-
-#include <cm3p/uv.h>
-
-#include "cmServer.h"
-#include "cmServerDictionary.h"
-
-#ifdef _WIN32
-#  include "io.h"
-#else
-#  include <unistd.h>
-#endif
-#include <cassert>
-#include <utility>
-
-cmStdIoConnection::cmStdIoConnection(
-  cmConnectionBufferStrategy* bufferStrategy)
-  : cmEventBasedConnection(bufferStrategy)
-{
-}
-
-cm::uv_stream_ptr cmStdIoConnection::SetupStream(int file_id)
-{
-  switch (uv_guess_handle(file_id)) {
-    case UV_TTY: {
-      cm::uv_tty_ptr tty;
-      tty.init(*this->Server->GetLoop(), file_id, file_id == 0,
-               static_cast<cmEventBasedConnection*>(this));
-      uv_tty_set_mode(tty, UV_TTY_MODE_NORMAL);
-      return { std::move(tty) };
-    }
-    case UV_FILE:
-      if (file_id == 0) {
-        return nullptr;
-      }
-      // Intentional fallthrough; stdin can _not_ be treated as a named
-      // pipe, however stdout can be.
-      CM_FALLTHROUGH;
-    case UV_NAMED_PIPE: {
-      cm::uv_pipe_ptr pipe;
-      pipe.init(*this->Server->GetLoop(), 0,
-                static_cast<cmEventBasedConnection*>(this));
-      uv_pipe_open(pipe, file_id);
-      return { std::move(pipe) };
-    }
-    default:
-      assert(false && "Unable to determine stream type");
-      return nullptr;
-  }
-}
-
-void cmStdIoConnection::SetServer(cmServerBase* s)
-{
-  cmConnection::SetServer(s);
-  if (!s) {
-    return;
-  }
-
-  this->ReadStream = SetupStream(0);
-  this->WriteStream = SetupStream(1);
-}
-
-void shutdown_connection(uv_prepare_t* prepare)
-{
-  cmStdIoConnection* connection =
-    static_cast<cmStdIoConnection*>(prepare->data);
-
-  if (!uv_is_closing(reinterpret_cast<uv_handle_t*>(prepare))) {
-    uv_close(reinterpret_cast<uv_handle_t*>(prepare),
-             &cmEventBasedConnection::on_close_delete<uv_prepare_t>);
-  }
-  connection->OnDisconnect(0);
-}
-
-bool cmStdIoConnection::OnServeStart(std::string* pString)
-{
-  Server->OnConnected(this);
-  if (this->ReadStream.get()) {
-    uv_read_start(this->ReadStream, on_alloc_buffer, on_read);
-  } else if (uv_guess_handle(0) == UV_FILE) {
-    char buffer[1024];
-    while (auto len = read(0, buffer, sizeof(buffer))) {
-      ReadData(std::string(buffer, buffer + len));
-    }
-
-    // We can't start the disconnect from here, add a prepare hook to do that
-    // for us
-    auto prepare = new uv_prepare_t();
-    prepare->data = this;
-    uv_prepare_init(Server->GetLoop(), prepare);
-    uv_prepare_start(prepare, shutdown_connection);
-  }
-  return cmConnection::OnServeStart(pString);
-}
-
-bool cmStdIoConnection::OnConnectionShuttingDown()
-{
-  if (ReadStream.get()) {
-    uv_read_stop(ReadStream);
-    ReadStream->data = nullptr;
-  }
-
-  this->ReadStream.reset();
-
-  cmEventBasedConnection::OnConnectionShuttingDown();
-
-  return true;
-}
-
-cmServerPipeConnection::cmServerPipeConnection(const std::string& name)
-  : cmPipeConnection(name, new cmServerBufferStrategy)
-{
-}
-
-cmServerStdIoConnection::cmServerStdIoConnection()
-  : cmStdIoConnection(new cmServerBufferStrategy)
-{
-}
-
-cmConnectionBufferStrategy::~cmConnectionBufferStrategy() = default;
-
-void cmConnectionBufferStrategy::clear()
-{
-}
-
-std::string cmServerBufferStrategy::BufferOutMessage(
-  const std::string& rawBuffer) const
-{
-  return std::string("\n") + kSTART_MAGIC + std::string("\n") + rawBuffer +
-    kEND_MAGIC + std::string("\n");
-}
-
-std::string cmServerBufferStrategy::BufferMessage(std::string& RawReadBuffer)
-{
-  for (;;) {
-    auto needle = RawReadBuffer.find('\n');
-
-    if (needle == std::string::npos) {
-      return "";
-    }
-    std::string line = RawReadBuffer.substr(0, needle);
-    const auto ls = line.size();
-    if (ls > 1 && line.at(ls - 1) == '\r') {
-      line.erase(ls - 1, 1);
-    }
-    RawReadBuffer.erase(RawReadBuffer.begin(),
-                        RawReadBuffer.begin() + static_cast<long>(needle) + 1);
-    if (line == kSTART_MAGIC) {
-      RequestBuffer.clear();
-      continue;
-    }
-    if (line == kEND_MAGIC) {
-      std::string rtn;
-      rtn.swap(this->RequestBuffer);
-      return rtn;
-    }
-
-    this->RequestBuffer += line;
-    this->RequestBuffer += "\n";
-  }
-}
diff --git a/Source/cmServerConnection.h b/Source/cmServerConnection.h
deleted file mode 100644
index a70edb4..0000000
--- a/Source/cmServerConnection.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <string>
-
-#include "cmConnection.h"
-#include "cmPipeConnection.h"
-#include "cmUVHandlePtr.h"
-
-class cmServerBase;
-
-/***
- * This connection buffer strategy accepts messages in the form of
- * [== "CMake Server" ==[
-{
-  ... some JSON message ...
-}
-]== "CMake Server" ==]
- * and only passes on the core json; it discards the envelope.
- */
-class cmServerBufferStrategy : public cmConnectionBufferStrategy
-{
-public:
-  std::string BufferMessage(std::string& rawBuffer) override;
-  std::string BufferOutMessage(const std::string& rawBuffer) const override;
-
-private:
-  std::string RequestBuffer;
-};
-
-/***
- * Generic connection over std io interfaces -- tty
- */
-class cmStdIoConnection : public cmEventBasedConnection
-{
-public:
-  cmStdIoConnection(cmConnectionBufferStrategy* bufferStrategy);
-
-  void SetServer(cmServerBase* s) override;
-
-  bool OnConnectionShuttingDown() override;
-
-  bool OnServeStart(std::string* pString) override;
-
-private:
-  cm::uv_stream_ptr SetupStream(int file_id);
-  cm::uv_stream_ptr ReadStream;
-};
-
-/***
- * These specific connections use the cmake server
- * buffering strategy.
- */
-class cmServerStdIoConnection : public cmStdIoConnection
-{
-public:
-  cmServerStdIoConnection();
-};
-
-class cmServerPipeConnection : public cmPipeConnection
-{
-public:
-  cmServerPipeConnection(const std::string& name);
-};
diff --git a/Source/cmServerDictionary.h b/Source/cmServerDictionary.h
deleted file mode 100644
index 961e4b7..0000000
--- a/Source/cmServerDictionary.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include <string>
-
-// Vocabulary:
-
-static const std::string kDIRTY_SIGNAL = "dirty";
-static const std::string kFILE_CHANGE_SIGNAL = "fileChange";
-
-static const std::string kCACHE_TYPE = "cache";
-static const std::string kCMAKE_INPUTS_TYPE = "cmakeInputs";
-static const std::string kCODE_MODEL_TYPE = "codemodel";
-static const std::string kCOMPUTE_TYPE = "compute";
-static const std::string kCONFIGURE_TYPE = "configure";
-static const std::string kERROR_TYPE = "error";
-static const std::string kFILESYSTEM_WATCHERS_TYPE = "fileSystemWatchers";
-static const std::string kGLOBAL_SETTINGS_TYPE = "globalSettings";
-static const std::string kHANDSHAKE_TYPE = "handshake";
-static const std::string kMESSAGE_TYPE = "message";
-static const std::string kPROGRESS_TYPE = "progress";
-static const std::string kREPLY_TYPE = "reply";
-static const std::string kSET_GLOBAL_SETTINGS_TYPE = "setGlobalSettings";
-static const std::string kSIGNAL_TYPE = "signal";
-static const std::string kCTEST_INFO_TYPE = "ctestInfo";
-
-static const std::string kBUILD_FILES_KEY = "buildFiles";
-static const std::string kCACHE_ARGUMENTS_KEY = "cacheArguments";
-static const std::string kCACHE_KEY = "cache";
-static const std::string kCAPABILITIES_KEY = "capabilities";
-static const std::string kCHECK_SYSTEM_VARS_KEY = "checkSystemVars";
-static const std::string kCMAKE_ROOT_DIRECTORY_KEY = "cmakeRootDirectory";
-static const std::string kCOOKIE_KEY = "cookie";
-static const std::string kDEBUG_OUTPUT_KEY = "debugOutput";
-static const std::string kERROR_MESSAGE_KEY = "errorMessage";
-static const std::string kEXTRA_GENERATOR_KEY = "extraGenerator";
-static const std::string kGENERATOR_KEY = "generator";
-static const std::string kIS_EXPERIMENTAL_KEY = "isExperimental";
-static const std::string kKEYS_KEY = "keys";
-static const std::string kMAJOR_KEY = "major";
-static const std::string kMESSAGE_KEY = "message";
-static const std::string kMINOR_KEY = "minor";
-static const std::string kPLATFORM_KEY = "platform";
-static const std::string kPROGRESS_CURRENT_KEY = "progressCurrent";
-static const std::string kPROGRESS_MAXIMUM_KEY = "progressMaximum";
-static const std::string kPROGRESS_MESSAGE_KEY = "progressMessage";
-static const std::string kPROGRESS_MINIMUM_KEY = "progressMinimum";
-static const std::string kPROTOCOL_VERSION_KEY = "protocolVersion";
-static const std::string kREPLY_TO_KEY = "inReplyTo";
-static const std::string kSUPPORTED_PROTOCOL_VERSIONS =
-  "supportedProtocolVersions";
-static const std::string kTITLE_KEY = "title";
-static const std::string kTOOLSET_KEY = "toolset";
-static const std::string kTRACE_EXPAND_KEY = "traceExpand";
-static const std::string kTRACE_KEY = "trace";
-static const std::string kWARN_UNINITIALIZED_KEY = "warnUninitialized";
-static const std::string kWARN_UNUSED_CLI_KEY = "warnUnusedCli";
-static const std::string kWARN_UNUSED_KEY = "warnUnused";
-static const std::string kWATCHED_DIRECTORIES_KEY = "watchedDirectories";
-static const std::string kWATCHED_FILES_KEY = "watchedFiles";
-
-static const std::string kSTART_MAGIC = "[== \"CMake Server\" ==[";
-static const std::string kEND_MAGIC = "]== \"CMake Server\" ==]";
-
-static const std::string kRENAME_PROPERTY_VALUE = "rename";
-static const std::string kCHANGE_PROPERTY_VALUE = "change";
diff --git a/Source/cmServerProtocol.cxx b/Source/cmServerProtocol.cxx
deleted file mode 100644
index e586fd9..0000000
--- a/Source/cmServerProtocol.cxx
+++ /dev/null
@@ -1,760 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmServerProtocol.h"
-
-#include <algorithm>
-#include <cassert>
-#include <functional>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include <cm/memory>
-#include <cmext/algorithm>
-
-#include <cm3p/uv.h>
-
-#include "cmExternalMakefileProjectGenerator.h"
-#include "cmFileMonitor.h"
-#include "cmGlobalGenerator.h"
-#include "cmJsonObjectDictionary.h"
-#include "cmJsonObjects.h"
-#include "cmMessageType.h"
-#include "cmProperty.h"
-#include "cmServer.h"
-#include "cmServerDictionary.h"
-#include "cmState.h"
-#include "cmSystemTools.h"
-#include "cmake.h"
-
-// Get rid of some windows macros:
-#undef max
-
-namespace {
-
-std::vector<std::string> toStringList(const Json::Value& in)
-{
-  std::vector<std::string> result;
-  for (auto const& it : in) {
-    result.push_back(it.asString());
-  }
-  return result;
-}
-
-} // namespace
-
-cmServerRequest::cmServerRequest(cmServer* server, cmConnection* connection,
-                                 std::string t, std::string c, Json::Value d)
-  : Type(std::move(t))
-  , Cookie(std::move(c))
-  , Data(std::move(d))
-  , Connection(connection)
-  , m_Server(server)
-{
-}
-
-void cmServerRequest::ReportProgress(int min, int current, int max,
-                                     const std::string& message) const
-{
-  this->m_Server->WriteProgress(*this, min, current, max, message);
-}
-
-void cmServerRequest::ReportMessage(const std::string& message,
-                                    const std::string& title) const
-{
-  m_Server->WriteMessage(*this, message, title);
-}
-
-cmServerResponse cmServerRequest::Reply(const Json::Value& data) const
-{
-  cmServerResponse response(*this);
-  response.SetData(data);
-  return response;
-}
-
-cmServerResponse cmServerRequest::ReportError(const std::string& message) const
-{
-  cmServerResponse response(*this);
-  response.SetError(message);
-  return response;
-}
-
-cmServerResponse::cmServerResponse(const cmServerRequest& request)
-  : Type(request.Type)
-  , Cookie(request.Cookie)
-{
-}
-
-void cmServerResponse::SetData(const Json::Value& data)
-{
-  assert(this->m_Payload == PAYLOAD_UNKNOWN);
-  if (!data[kCOOKIE_KEY].isNull() || !data[kTYPE_KEY].isNull()) {
-    this->SetError("Response contains cookie or type field.");
-    return;
-  }
-  this->m_Payload = PAYLOAD_DATA;
-  this->m_Data = data;
-}
-
-void cmServerResponse::SetError(const std::string& message)
-{
-  assert(this->m_Payload == PAYLOAD_UNKNOWN);
-  this->m_Payload = PAYLOAD_ERROR;
-  this->m_ErrorMessage = message;
-}
-
-bool cmServerResponse::IsComplete() const
-{
-  return this->m_Payload != PAYLOAD_UNKNOWN;
-}
-
-bool cmServerResponse::IsError() const
-{
-  assert(this->m_Payload != PAYLOAD_UNKNOWN);
-  return this->m_Payload == PAYLOAD_ERROR;
-}
-
-std::string cmServerResponse::ErrorMessage() const
-{
-  if (this->m_Payload == PAYLOAD_ERROR) {
-    return this->m_ErrorMessage;
-  }
-  return std::string();
-}
-
-Json::Value cmServerResponse::Data() const
-{
-  assert(this->m_Payload != PAYLOAD_UNKNOWN);
-  return this->m_Data;
-}
-
-bool cmServerProtocol::Activate(cmServer* server,
-                                const cmServerRequest& request,
-                                std::string* errorMessage)
-{
-  assert(server);
-  this->m_Server = server;
-  this->m_CMakeInstance =
-    cm::make_unique<cmake>(cmake::RoleProject, cmState::Project);
-  this->m_WarnUnused = false;
-  const bool result = this->DoActivate(request, errorMessage);
-  if (!result) {
-    this->m_CMakeInstance = nullptr;
-  }
-  return result;
-}
-
-cmFileMonitor* cmServerProtocol::FileMonitor() const
-{
-  return this->m_Server ? this->m_Server->FileMonitor() : nullptr;
-}
-
-void cmServerProtocol::SendSignal(const std::string& name,
-                                  const Json::Value& data) const
-{
-  if (this->m_Server) {
-    this->m_Server->WriteSignal(name, data);
-  }
-}
-
-cmake* cmServerProtocol::CMakeInstance() const
-{
-  return this->m_CMakeInstance.get();
-}
-
-bool cmServerProtocol::DoActivate(const cmServerRequest& /*request*/,
-                                  std::string* /*errorMessage*/)
-{
-  return true;
-}
-
-std::pair<int, int> cmServerProtocol1::ProtocolVersion() const
-{
-  return { 1, 2 };
-}
-
-static void setErrorMessage(std::string* errorMessage, const std::string& text)
-{
-  if (errorMessage) {
-    *errorMessage = text;
-  }
-}
-
-static bool getOrTestHomeDirectory(cmState* state, std::string& value,
-                                   std::string* errorMessage)
-{
-  const std::string cachedValue =
-    *state->GetCacheEntryValue("CMAKE_HOME_DIRECTORY");
-  if (value.empty()) {
-    value = cachedValue;
-    return true;
-  }
-  const std::string suffix = "/CMakeLists.txt";
-  const std::string cachedValueCML = cachedValue + suffix;
-  const std::string valueCML = value + suffix;
-  if (!cmSystemTools::SameFile(valueCML, cachedValueCML)) {
-    setErrorMessage(errorMessage,
-                    std::string("\"CMAKE_HOME_DIRECTORY\" is set but "
-                                "incompatible with configured "
-                                "source directory value."));
-    return false;
-  }
-  return true;
-}
-
-static bool getOrTestValue(cmState* state, const std::string& key,
-                           std::string& value,
-                           const std::string& keyDescription,
-                           std::string* errorMessage)
-{
-  const std::string cachedValue = state->GetSafeCacheEntryValue(key);
-  if (value.empty()) {
-    value = cachedValue;
-  }
-  if (!cachedValue.empty() && cachedValue != value) {
-    setErrorMessage(errorMessage,
-                    std::string("\"") + key +
-                      "\" is set but incompatible with configured " +
-                      keyDescription + " value.");
-    return false;
-  }
-  return true;
-}
-
-bool cmServerProtocol1::DoActivate(const cmServerRequest& request,
-                                   std::string* errorMessage)
-{
-  std::string sourceDirectory = request.Data[kSOURCE_DIRECTORY_KEY].asString();
-  std::string buildDirectory = request.Data[kBUILD_DIRECTORY_KEY].asString();
-  std::string generator = request.Data[kGENERATOR_KEY].asString();
-  std::string extraGenerator = request.Data[kEXTRA_GENERATOR_KEY].asString();
-  std::string toolset = request.Data[kTOOLSET_KEY].asString();
-  std::string platform = request.Data[kPLATFORM_KEY].asString();
-
-  // normalize source and build directory
-  if (!sourceDirectory.empty()) {
-    sourceDirectory = cmSystemTools::CollapseFullPath(sourceDirectory);
-    cmSystemTools::ConvertToUnixSlashes(sourceDirectory);
-  }
-  if (!buildDirectory.empty()) {
-    buildDirectory = cmSystemTools::CollapseFullPath(buildDirectory);
-    cmSystemTools::ConvertToUnixSlashes(buildDirectory);
-  }
-
-  if (buildDirectory.empty()) {
-    setErrorMessage(errorMessage,
-                    std::string("\"") + kBUILD_DIRECTORY_KEY +
-                      "\" is missing.");
-    return false;
-  }
-
-  cmake* cm = CMakeInstance();
-  if (cmSystemTools::PathExists(buildDirectory)) {
-    if (!cmSystemTools::FileIsDirectory(buildDirectory)) {
-      setErrorMessage(errorMessage,
-                      std::string("\"") + kBUILD_DIRECTORY_KEY +
-                        "\" exists but is not a directory.");
-      return false;
-    }
-
-    const std::string cachePath = cmake::FindCacheFile(buildDirectory);
-    if (cm->LoadCache(cachePath)) {
-      cmState* state = cm->GetState();
-
-      // Check generator:
-      if (!getOrTestValue(state, "CMAKE_GENERATOR", generator, "generator",
-                          errorMessage)) {
-        return false;
-      }
-
-      // check extra generator:
-      if (!getOrTestValue(state, "CMAKE_EXTRA_GENERATOR", extraGenerator,
-                          "extra generator", errorMessage)) {
-        return false;
-      }
-
-      // check sourcedir:
-      if (!getOrTestHomeDirectory(state, sourceDirectory, errorMessage)) {
-        return false;
-      }
-
-      // check toolset:
-      if (!getOrTestValue(state, "CMAKE_GENERATOR_TOOLSET", toolset, "toolset",
-                          errorMessage)) {
-        return false;
-      }
-
-      // check platform:
-      if (!getOrTestValue(state, "CMAKE_GENERATOR_PLATFORM", platform,
-                          "platform", errorMessage)) {
-        return false;
-      }
-    }
-  }
-
-  if (sourceDirectory.empty()) {
-    setErrorMessage(errorMessage,
-                    std::string("\"") + kSOURCE_DIRECTORY_KEY +
-                      "\" is unset but required.");
-    return false;
-  }
-  if (!cmSystemTools::FileIsDirectory(sourceDirectory)) {
-    setErrorMessage(errorMessage,
-                    std::string("\"") + kSOURCE_DIRECTORY_KEY +
-                      "\" is not a directory.");
-    return false;
-  }
-  if (generator.empty()) {
-    setErrorMessage(errorMessage,
-                    std::string("\"") + kGENERATOR_KEY +
-                      "\" is unset but required.");
-    return false;
-  }
-
-  std::vector<cmake::GeneratorInfo> generators;
-  cm->GetRegisteredGenerators(generators);
-  auto baseIt = std::find_if(generators.begin(), generators.end(),
-                             [&generator](const cmake::GeneratorInfo& info) {
-                               return info.name == generator;
-                             });
-  if (baseIt == generators.end()) {
-    setErrorMessage(errorMessage,
-                    std::string("Generator \"") + generator +
-                      "\" not supported.");
-    return false;
-  }
-  auto extraIt = std::find_if(
-    generators.begin(), generators.end(),
-    [&generator, &extraGenerator](const cmake::GeneratorInfo& info) {
-      return info.baseName == generator && info.extraName == extraGenerator;
-    });
-  if (extraIt == generators.end()) {
-    setErrorMessage(errorMessage,
-                    std::string("The combination of generator \"" + generator +
-                                "\" and extra generator \"" + extraGenerator +
-                                "\" is not supported."));
-    return false;
-  }
-  if (!extraIt->supportsToolset && !toolset.empty()) {
-    setErrorMessage(errorMessage,
-                    std::string("Toolset was provided but is not supported by "
-                                "the requested generator."));
-    return false;
-  }
-  if (!extraIt->supportsPlatform && !platform.empty()) {
-    setErrorMessage(errorMessage,
-                    std::string("Platform was provided but is not supported "
-                                "by the requested generator."));
-    return false;
-  }
-
-  this->GeneratorInfo =
-    GeneratorInformation(generator, extraGenerator, toolset, platform,
-                         sourceDirectory, buildDirectory);
-
-  this->m_State = STATE_ACTIVE;
-  return true;
-}
-
-void cmServerProtocol1::HandleCMakeFileChanges(const std::string& path,
-                                               int event, int status)
-{
-  assert(status == 0);
-  static_cast<void>(status);
-
-  if (!m_isDirty) {
-    m_isDirty = true;
-    SendSignal(kDIRTY_SIGNAL, Json::objectValue);
-  }
-  Json::Value obj = Json::objectValue;
-  obj[kPATH_KEY] = path;
-  Json::Value properties = Json::arrayValue;
-  if (event & UV_RENAME) {
-    properties.append(kRENAME_PROPERTY_VALUE);
-  }
-  if (event & UV_CHANGE) {
-    properties.append(kCHANGE_PROPERTY_VALUE);
-  }
-
-  obj[kPROPERTIES_KEY] = properties;
-  SendSignal(kFILE_CHANGE_SIGNAL, obj);
-}
-
-cmServerResponse cmServerProtocol1::Process(const cmServerRequest& request)
-{
-  assert(this->m_State >= STATE_ACTIVE);
-
-  if (request.Type == kCACHE_TYPE) {
-    return this->ProcessCache(request);
-  }
-  if (request.Type == kCMAKE_INPUTS_TYPE) {
-    return this->ProcessCMakeInputs(request);
-  }
-  if (request.Type == kCODE_MODEL_TYPE) {
-    return this->ProcessCodeModel(request);
-  }
-  if (request.Type == kCOMPUTE_TYPE) {
-    return this->ProcessCompute(request);
-  }
-  if (request.Type == kCONFIGURE_TYPE) {
-    return this->ProcessConfigure(request);
-  }
-  if (request.Type == kFILESYSTEM_WATCHERS_TYPE) {
-    return this->ProcessFileSystemWatchers(request);
-  }
-  if (request.Type == kGLOBAL_SETTINGS_TYPE) {
-    return this->ProcessGlobalSettings(request);
-  }
-  if (request.Type == kSET_GLOBAL_SETTINGS_TYPE) {
-    return this->ProcessSetGlobalSettings(request);
-  }
-  if (request.Type == kCTEST_INFO_TYPE) {
-    return this->ProcessCTests(request);
-  }
-
-  return request.ReportError("Unknown command!");
-}
-
-bool cmServerProtocol1::IsExperimental() const
-{
-  return true;
-}
-
-cmServerResponse cmServerProtocol1::ProcessCache(
-  const cmServerRequest& request)
-{
-  cmState* state = this->CMakeInstance()->GetState();
-
-  Json::Value result = Json::objectValue;
-
-  std::vector<std::string> allKeys = state->GetCacheEntryKeys();
-
-  Json::Value list = Json::arrayValue;
-  std::vector<std::string> keys = toStringList(request.Data[kKEYS_KEY]);
-  if (keys.empty()) {
-    keys = allKeys;
-  } else {
-    for (auto const& i : keys) {
-      if (!cm::contains(allKeys, i)) {
-        return request.ReportError("Key \"" + i + "\" not found in cache.");
-      }
-    }
-  }
-  std::sort(keys.begin(), keys.end());
-  for (auto const& key : keys) {
-    Json::Value entry = Json::objectValue;
-    entry[kKEY_KEY] = key;
-    entry[kTYPE_KEY] =
-      cmState::CacheEntryTypeToString(state->GetCacheEntryType(key));
-    entry[kVALUE_KEY] = *state->GetCacheEntryValue(key);
-
-    Json::Value props = Json::objectValue;
-    bool haveProperties = false;
-    for (auto const& prop : state->GetCacheEntryPropertyList(key)) {
-      haveProperties = true;
-      props[prop] = *state->GetCacheEntryProperty(key, prop);
-    }
-    if (haveProperties) {
-      entry[kPROPERTIES_KEY] = props;
-    }
-
-    list.append(entry);
-  }
-
-  result[kCACHE_KEY] = list;
-  return request.Reply(result);
-}
-
-cmServerResponse cmServerProtocol1::ProcessCMakeInputs(
-  const cmServerRequest& request)
-{
-  if (this->m_State < STATE_CONFIGURED) {
-    return request.ReportError("This instance was not yet configured.");
-  }
-
-  const cmake* cm = this->CMakeInstance();
-  const std::string cmakeRootDir = cmSystemTools::GetCMakeRoot();
-  const std::string& sourceDir = cm->GetHomeDirectory();
-
-  Json::Value result = Json::objectValue;
-  result[kSOURCE_DIRECTORY_KEY] = sourceDir;
-  result[kCMAKE_ROOT_DIRECTORY_KEY] = cmakeRootDir;
-  result[kBUILD_FILES_KEY] = cmDumpCMakeInputs(cm);
-  return request.Reply(result);
-}
-
-cmServerResponse cmServerProtocol1::ProcessCodeModel(
-  const cmServerRequest& request)
-{
-  if (this->m_State != STATE_COMPUTED) {
-    return request.ReportError("No build system was generated yet.");
-  }
-
-  return request.Reply(cmDumpCodeModel(this->CMakeInstance()));
-}
-
-cmServerResponse cmServerProtocol1::ProcessCompute(
-  const cmServerRequest& request)
-{
-  if (this->m_State > STATE_CONFIGURED) {
-    return request.ReportError("This build system was already generated.");
-  }
-  if (this->m_State < STATE_CONFIGURED) {
-    return request.ReportError("This project was not configured yet.");
-  }
-
-  cmake* cm = this->CMakeInstance();
-  int ret = cm->Generate();
-
-  if (ret < 0) {
-    return request.ReportError("Failed to compute build system.");
-  }
-  m_State = STATE_COMPUTED;
-  return request.Reply(Json::Value());
-}
-
-cmServerResponse cmServerProtocol1::ProcessConfigure(
-  const cmServerRequest& request)
-{
-  if (this->m_State == STATE_INACTIVE) {
-    return request.ReportError("This instance is inactive.");
-  }
-
-  FileMonitor()->StopMonitoring();
-
-  std::string errorMessage;
-  cmake* cm = this->CMakeInstance();
-  this->GeneratorInfo.SetupGenerator(cm, &errorMessage);
-  if (!errorMessage.empty()) {
-    return request.ReportError(errorMessage);
-  }
-
-  // Make sure the types of cacheArguments matches (if given):
-  std::vector<std::string> cacheArgs = { "unused" };
-  bool cacheArgumentsError = false;
-  const Json::Value passedArgs = request.Data[kCACHE_ARGUMENTS_KEY];
-  if (!passedArgs.isNull()) {
-    if (passedArgs.isString()) {
-      cacheArgs.push_back(passedArgs.asString());
-    } else if (passedArgs.isArray()) {
-      for (auto const& arg : passedArgs) {
-        if (!arg.isString()) {
-          cacheArgumentsError = true;
-          break;
-        }
-        cacheArgs.push_back(arg.asString());
-      }
-    } else {
-      cacheArgumentsError = true;
-    }
-  }
-  if (cacheArgumentsError) {
-    request.ReportError(
-      "cacheArguments must be unset, a string or an array of strings.");
-  }
-
-  std::string sourceDir = cm->GetHomeDirectory();
-  const std::string buildDir = cm->GetHomeOutputDirectory();
-
-  cmGlobalGenerator* gg = cm->GetGlobalGenerator();
-
-  if (buildDir.empty()) {
-    return request.ReportError("No build directory set via Handshake.");
-  }
-
-  if (cm->LoadCache(buildDir)) {
-    // build directory has been set up before
-    cmProp cachedSourceDir =
-      cm->GetState()->GetInitializedCacheValue("CMAKE_HOME_DIRECTORY");
-    if (!cachedSourceDir) {
-      return request.ReportError("No CMAKE_HOME_DIRECTORY found in cache.");
-    }
-    if (sourceDir.empty()) {
-      sourceDir = *cachedSourceDir;
-      cm->SetHomeDirectory(sourceDir);
-    }
-
-    cmProp cachedGenerator =
-      cm->GetState()->GetInitializedCacheValue("CMAKE_GENERATOR");
-    if (cachedGenerator) {
-      if (gg && gg->GetName() != *cachedGenerator) {
-        return request.ReportError("Configured generator does not match with "
-                                   "CMAKE_GENERATOR found in cache.");
-      }
-    }
-  } else {
-    // build directory has not been set up before
-    if (sourceDir.empty()) {
-      return request.ReportError("No sourceDirectory set via "
-                                 "setGlobalSettings and no cache found in "
-                                 "buildDirectory.");
-    }
-  }
-
-  cmSystemTools::ResetErrorOccuredFlag(); // Reset error state
-
-  if (cm->AddCMakePaths() != 1) {
-    return request.ReportError("Failed to set CMake paths.");
-  }
-
-  if (!cm->SetCacheArgs(cacheArgs)) {
-    return request.ReportError("cacheArguments could not be set.");
-  }
-
-  int ret = cm->Configure();
-  cm->IssueMessage(
-    MessageType::DEPRECATION_WARNING,
-    "The 'cmake-server(7)' is deprecated.  "
-    "Please port clients to use the 'cmake-file-api(7)' instead.");
-  if (ret < 0) {
-    return request.ReportError("Configuration failed.");
-  }
-
-  std::vector<std::string> toWatchList;
-  cmGetCMakeInputs(gg, std::string(), buildDir, nullptr, &toWatchList,
-                   nullptr);
-
-  FileMonitor()->MonitorPaths(toWatchList,
-                              [this](const std::string& p, int e, int s) {
-                                this->HandleCMakeFileChanges(p, e, s);
-                              });
-
-  m_State = STATE_CONFIGURED;
-  m_isDirty = false;
-  return request.Reply(Json::Value());
-}
-
-cmServerResponse cmServerProtocol1::ProcessGlobalSettings(
-  const cmServerRequest& request)
-{
-  cmake* cm = this->CMakeInstance();
-  Json::Value obj = Json::objectValue;
-
-  // Capabilities information:
-  obj[kCAPABILITIES_KEY] = cm->ReportCapabilitiesJson();
-
-  obj[kDEBUG_OUTPUT_KEY] = cm->GetDebugOutput();
-  obj[kTRACE_KEY] = cm->GetTrace();
-  obj[kTRACE_EXPAND_KEY] = cm->GetTraceExpand();
-  obj[kWARN_UNINITIALIZED_KEY] = cm->GetWarnUninitialized();
-  obj[kWARN_UNUSED_KEY] = m_WarnUnused;
-  obj[kWARN_UNUSED_CLI_KEY] = cm->GetWarnUnusedCli();
-  obj[kCHECK_SYSTEM_VARS_KEY] = cm->GetCheckSystemVars();
-
-  obj[kSOURCE_DIRECTORY_KEY] = this->GeneratorInfo.SourceDirectory;
-  obj[kBUILD_DIRECTORY_KEY] = this->GeneratorInfo.BuildDirectory;
-
-  // Currently used generator:
-  obj[kGENERATOR_KEY] = this->GeneratorInfo.GeneratorName;
-  obj[kEXTRA_GENERATOR_KEY] = this->GeneratorInfo.ExtraGeneratorName;
-
-  return request.Reply(obj);
-}
-
-static void setBool(const cmServerRequest& request, const std::string& key,
-                    std::function<void(bool)> const& setter)
-{
-  if (request.Data[key].isNull()) {
-    return;
-  }
-  setter(request.Data[key].asBool());
-}
-
-cmServerResponse cmServerProtocol1::ProcessSetGlobalSettings(
-  const cmServerRequest& request)
-{
-  const std::vector<std::string> boolValues = {
-    kDEBUG_OUTPUT_KEY,       kTRACE_KEY,       kTRACE_EXPAND_KEY,
-    kWARN_UNINITIALIZED_KEY, kWARN_UNUSED_KEY, kWARN_UNUSED_CLI_KEY,
-    kCHECK_SYSTEM_VARS_KEY
-  };
-  for (std::string const& i : boolValues) {
-    if (!request.Data[i].isNull() && !request.Data[i].isBool()) {
-      return request.ReportError("\"" + i +
-                                 "\" must be unset or a bool value.");
-    }
-  }
-
-  cmake* cm = this->CMakeInstance();
-
-  setBool(request, kDEBUG_OUTPUT_KEY,
-          [cm](bool e) { cm->SetDebugOutputOn(e); });
-  setBool(request, kTRACE_KEY, [cm](bool e) { cm->SetTrace(e); });
-  setBool(request, kTRACE_EXPAND_KEY, [cm](bool e) { cm->SetTraceExpand(e); });
-  setBool(request, kWARN_UNINITIALIZED_KEY,
-          [cm](bool e) { cm->SetWarnUninitialized(e); });
-  setBool(request, kWARN_UNUSED_KEY, [this](bool e) { m_WarnUnused = e; });
-  setBool(request, kWARN_UNUSED_CLI_KEY,
-          [cm](bool e) { cm->SetWarnUnusedCli(e); });
-  setBool(request, kCHECK_SYSTEM_VARS_KEY,
-          [cm](bool e) { cm->SetCheckSystemVars(e); });
-
-  return request.Reply(Json::Value());
-}
-
-cmServerResponse cmServerProtocol1::ProcessFileSystemWatchers(
-  const cmServerRequest& request)
-{
-  const cmFileMonitor* const fm = FileMonitor();
-  Json::Value result = Json::objectValue;
-  Json::Value files = Json::arrayValue;
-  for (auto const& f : fm->WatchedFiles()) {
-    files.append(f);
-  }
-  Json::Value directories = Json::arrayValue;
-  for (auto const& d : fm->WatchedDirectories()) {
-    directories.append(d);
-  }
-  result[kWATCHED_FILES_KEY] = files;
-  result[kWATCHED_DIRECTORIES_KEY] = directories;
-
-  return request.Reply(result);
-}
-
-cmServerResponse cmServerProtocol1::ProcessCTests(
-  const cmServerRequest& request)
-{
-  if (this->m_State < STATE_COMPUTED) {
-    return request.ReportError("This instance was not yet computed.");
-  }
-
-  return request.Reply(cmDumpCTestInfo(this->CMakeInstance()));
-}
-
-cmServerProtocol1::GeneratorInformation::GeneratorInformation(
-  std::string generatorName, std::string extraGeneratorName,
-  std::string toolset, std::string platform, std::string sourceDirectory,
-  std::string buildDirectory)
-  : GeneratorName(std::move(generatorName))
-  , ExtraGeneratorName(std::move(extraGeneratorName))
-  , Toolset(std::move(toolset))
-  , Platform(std::move(platform))
-  , SourceDirectory(std::move(sourceDirectory))
-  , BuildDirectory(std::move(buildDirectory))
-{
-}
-
-void cmServerProtocol1::GeneratorInformation::SetupGenerator(
-  cmake* cm, std::string* errorMessage)
-{
-  const std::string fullGeneratorName =
-    cmExternalMakefileProjectGenerator::CreateFullGeneratorName(
-      GeneratorName, ExtraGeneratorName);
-
-  cm->SetHomeDirectory(SourceDirectory);
-  cm->SetHomeOutputDirectory(BuildDirectory);
-
-  auto gg = cm->CreateGlobalGenerator(fullGeneratorName);
-  if (!gg) {
-    setErrorMessage(
-      errorMessage,
-      std::string("Could not set up the requested combination of \"") +
-        kGENERATOR_KEY + "\" and \"" + kEXTRA_GENERATOR_KEY + "\"");
-    return;
-  }
-
-  cm->SetGlobalGenerator(std::move(gg));
-
-  cm->SetGeneratorToolset(Toolset);
-  cm->SetGeneratorPlatform(Platform);
-}
diff --git a/Source/cmServerProtocol.h b/Source/cmServerProtocol.h
deleted file mode 100644
index 6009e23..0000000
--- a/Source/cmServerProtocol.h
+++ /dev/null
@@ -1,162 +0,0 @@
-/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
-   file Copyright.txt or https://cmake.org/licensing for details.  */
-#pragma once
-
-#include "cmConfigure.h" // IWYU pragma: keep
-
-#include <memory>
-#include <string>
-#include <utility>
-
-#include <cm3p/json/value.h>
-
-#include "cmake.h"
-
-class cmConnection;
-class cmFileMonitor;
-class cmServer;
-class cmServerRequest;
-
-class cmServerResponse
-{
-public:
-  explicit cmServerResponse(const cmServerRequest& request);
-
-  void SetData(const Json::Value& data);
-  void SetError(const std::string& message);
-
-  bool IsComplete() const;
-  bool IsError() const;
-  std::string ErrorMessage() const;
-  Json::Value Data() const;
-
-  const std::string Type;
-  const std::string Cookie;
-
-private:
-  enum PayLoad
-  {
-    PAYLOAD_UNKNOWN,
-    PAYLOAD_ERROR,
-    PAYLOAD_DATA
-  };
-  PayLoad m_Payload = PAYLOAD_UNKNOWN;
-  std::string m_ErrorMessage;
-  Json::Value m_Data;
-};
-
-class cmServerRequest
-{
-public:
-  cmServerResponse Reply(const Json::Value& data) const;
-  cmServerResponse ReportError(const std::string& message) const;
-
-  const std::string Type;
-  const std::string Cookie;
-  const Json::Value Data;
-  cmConnection* Connection;
-
-private:
-  cmServerRequest(cmServer* server, cmConnection* connection, std::string t,
-                  std::string c, Json::Value d);
-
-  void ReportProgress(int min, int current, int max,
-                      const std::string& message) const;
-  void ReportMessage(const std::string& message,
-                     const std::string& title) const;
-
-  cmServer* m_Server;
-
-  friend class cmServer;
-};
-
-class cmServerProtocol
-{
-public:
-  cmServerProtocol() = default;
-  virtual ~cmServerProtocol() = default;
-
-  cmServerProtocol(cmServerProtocol const&) = delete;
-  cmServerProtocol& operator=(cmServerProtocol const&) = delete;
-
-  virtual std::pair<int, int> ProtocolVersion() const = 0;
-  virtual bool IsExperimental() const = 0;
-  virtual cmServerResponse Process(const cmServerRequest& request) = 0;
-
-  bool Activate(cmServer* server, const cmServerRequest& request,
-                std::string* errorMessage);
-
-  cmFileMonitor* FileMonitor() const;
-  void SendSignal(const std::string& name, const Json::Value& data) const;
-
-protected:
-  cmake* CMakeInstance() const;
-  // Implement protocol specific activation tasks here. Called from Activate().
-  virtual bool DoActivate(const cmServerRequest& request,
-                          std::string* errorMessage);
-  bool m_WarnUnused = false; // storage for legacy option
-
-private:
-  std::unique_ptr<cmake> m_CMakeInstance;
-  cmServer* m_Server = nullptr; // not owned!
-
-  friend class cmServer;
-};
-
-class cmServerProtocol1 : public cmServerProtocol
-{
-public:
-  std::pair<int, int> ProtocolVersion() const override;
-  bool IsExperimental() const override;
-  cmServerResponse Process(const cmServerRequest& request) override;
-
-private:
-  bool DoActivate(const cmServerRequest& request,
-                  std::string* errorMessage) override;
-
-  void HandleCMakeFileChanges(const std::string& path, int event, int status);
-
-  // Handle requests:
-  cmServerResponse ProcessCache(const cmServerRequest& request);
-  cmServerResponse ProcessCMakeInputs(const cmServerRequest& request);
-  cmServerResponse ProcessCodeModel(const cmServerRequest& request);
-  cmServerResponse ProcessCompute(const cmServerRequest& request);
-  cmServerResponse ProcessConfigure(const cmServerRequest& request);
-  cmServerResponse ProcessGlobalSettings(const cmServerRequest& request);
-  cmServerResponse ProcessSetGlobalSettings(const cmServerRequest& request);
-  cmServerResponse ProcessFileSystemWatchers(const cmServerRequest& request);
-  cmServerResponse ProcessCTests(const cmServerRequest& request);
-
-  enum State
-  {
-    STATE_INACTIVE,
-    STATE_ACTIVE,
-    STATE_CONFIGURED,
-    STATE_COMPUTED
-  };
-  State m_State = STATE_INACTIVE;
-
-  bool m_isDirty = false;
-
-  struct GeneratorInformation
-  {
-  public:
-    GeneratorInformation() = default;
-    GeneratorInformation(std::string generatorName,
-                         std::string extraGeneratorName, std::string toolset,
-                         std::string platform, std::string sourceDirectory,
-                         std::string buildDirectory);
-
-    void SetupGenerator(cmake* cm, std::string* errorMessage);
-
-    std::string GeneratorName;
-    std::string ExtraGeneratorName;
-    std::string Toolset;
-    std::string Platform;
-
-    std::string SourceDirectory;
-    std::string BuildDirectory;
-  };
-
-  GeneratorInformation GeneratorInfo;
-};
diff --git a/Source/cmSourceFile.cxx b/Source/cmSourceFile.cxx
index ef44a57..61f48e9 100644
--- a/Source/cmSourceFile.cxx
+++ b/Source/cmSourceFile.cxx
@@ -8,6 +8,7 @@
 #include "cmListFileCache.h"
 #include "cmMakefile.h"
 #include "cmMessageType.h"
+#include "cmPolicies.h"
 #include "cmProperty.h"
 #include "cmState.h"
 #include "cmStringAlgorithms.h"
@@ -93,10 +94,11 @@ cmSourceFileLocation const& cmSourceFile::GetLocation() const
   return this->Location;
 }
 
-std::string const& cmSourceFile::ResolveFullPath(std::string* error)
+std::string const& cmSourceFile::ResolveFullPath(std::string* error,
+                                                 std::string* cmp0115Warning)
 {
   if (this->FullPath.empty()) {
-    if (this->FindFullPath(error)) {
+    if (this->FindFullPath(error, cmp0115Warning)) {
       this->CheckExtension();
     }
   }
@@ -108,7 +110,8 @@ std::string const& cmSourceFile::GetFullPath() const
   return this->FullPath;
 }
 
-bool cmSourceFile::FindFullPath(std::string* error)
+bool cmSourceFile::FindFullPath(std::string* error,
+                                std::string* cmp0115Warning)
 {
   // If the file is generated compute the location without checking on disk.
   if (this->GetIsGenerated()) {
@@ -131,9 +134,11 @@ bool cmSourceFile::FindFullPath(std::string* error)
   // List of extension lists
   std::vector<std::string> exts =
     makefile->GetCMakeInstance()->GetAllExtensions();
+  auto cmp0115 = makefile->GetPolicyStatus(cmPolicies::CMP0115);
 
   // Tries to find the file in a given directory
-  auto findInDir = [this, &exts, &lPath](std::string const& dir) -> bool {
+  auto findInDir = [this, &exts, &lPath, cmp0115, cmp0115Warning,
+                    makefile](std::string const& dir) -> bool {
     // Compute full path
     std::string const fullPath = cmSystemTools::CollapseFullPath(lPath, dir);
     // Try full path
@@ -141,13 +146,29 @@ bool cmSourceFile::FindFullPath(std::string* error)
       this->FullPath = fullPath;
       return true;
     }
-    // Try full path with extension
-    for (std::string const& ext : exts) {
-      if (!ext.empty()) {
-        std::string extPath = cmStrCat(fullPath, '.', ext);
-        if (cmSystemTools::FileExists(extPath)) {
-          this->FullPath = extPath;
-          return true;
+    // This has to be an if statement due to a bug in Oracle Developer Studio.
+    // See https://community.oracle.com/tech/developers/discussion/4476246/
+    // for details.
+    if (cmp0115 == cmPolicies::OLD || cmp0115 == cmPolicies::WARN) {
+      // Try full path with extension
+      for (std::string const& ext : exts) {
+        if (!ext.empty()) {
+          std::string extPath = cmStrCat(fullPath, '.', ext);
+          if (cmSystemTools::FileExists(extPath)) {
+            this->FullPath = extPath;
+            if (cmp0115 == cmPolicies::WARN) {
+              std::string warning =
+                cmStrCat(cmPolicies::GetPolicyWarning(cmPolicies::CMP0115),
+                         "\nFile:\n  ", extPath);
+              if (cmp0115Warning) {
+                *cmp0115Warning = std::move(warning);
+              } else {
+                makefile->GetCMakeInstance()->IssueMessage(
+                  MessageType::AUTHOR_WARNING, warning);
+              }
+            }
+            return true;
+          }
         }
       }
     }
@@ -168,11 +189,19 @@ bool cmSourceFile::FindFullPath(std::string* error)
   }
 
   // Compose error
-  std::string err =
-    cmStrCat("Cannot find source file:\n  ", lPath, "\nTried extensions");
-  for (std::string const& ext : exts) {
-    err += " .";
-    err += ext;
+  std::string err = cmStrCat("Cannot find source file:\n  ", lPath);
+  switch (cmp0115) {
+    case cmPolicies::OLD:
+    case cmPolicies::WARN:
+      err = cmStrCat(err, "\nTried extensions");
+      for (auto const& ext : exts) {
+        err = cmStrCat(err, " .", ext);
+      }
+      break;
+    case cmPolicies::REQUIRED_IF_USED:
+    case cmPolicies::REQUIRED_ALWAYS:
+    case cmPolicies::NEW:
+      break;
   }
   if (error != nullptr) {
     *error = std::move(err);
diff --git a/Source/cmSourceFile.h b/Source/cmSourceFile.h
index 39ea8e3..3196b3f 100644
--- a/Source/cmSourceFile.h
+++ b/Source/cmSourceFile.h
@@ -77,7 +77,8 @@ public:
    * Resolves the full path to the file.  Attempts to locate the file on disk
    * and finalizes its location.
    */
-  std::string const& ResolveFullPath(std::string* error = nullptr);
+  std::string const& ResolveFullPath(std::string* error = nullptr,
+                                     std::string* cmp0115Warning = nullptr);
 
   /**
    * The resolved full path to the file.  The returned file name might be empty
@@ -138,7 +139,7 @@ private:
   bool FindFullPathFailed = false;
   bool IsGenerated = false;
 
-  bool FindFullPath(std::string* error);
+  bool FindFullPath(std::string* error, std::string* cmp0115Warning);
   void CheckExtension();
   void CheckLanguage(std::string const& ext);
 
diff --git a/Source/cmTransformDepfile.cxx b/Source/cmTransformDepfile.cxx
new file mode 100644
index 0000000..e1f8753
--- /dev/null
+++ b/Source/cmTransformDepfile.cxx
@@ -0,0 +1,114 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmTransformDepfile.h"
+
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include <cm/optional>
+
+#include "cmsys/FStream.hxx"
+
+#include "cmGccDepfileReader.h"
+#include "cmGccDepfileReaderTypes.h"
+#include "cmStringAlgorithms.h"
+#include "cmSystemTools.h"
+
+namespace {
+void WriteFilenameGcc(cmsys::ofstream& fout, const std::string& filename)
+{
+  for (auto c : filename) {
+    switch (c) {
+      case ' ':
+        fout << "\\ ";
+        break;
+      case '\\':
+        fout << "\\\\";
+        break;
+      default:
+        fout << c;
+        break;
+    }
+  }
+}
+
+void WriteGccDepfile(cmsys::ofstream& fout, const cmGccDepfileContent& content)
+{
+  for (auto const& dep : content) {
+    bool first = true;
+    for (auto const& rule : dep.rules) {
+      if (!first) {
+        fout << " \\\n  ";
+      }
+      first = false;
+      WriteFilenameGcc(fout, rule);
+    }
+    fout << ':';
+    for (auto const& path : dep.paths) {
+      fout << " \\\n  " << path;
+    }
+    fout << '\n';
+  }
+}
+
+void WriteVsTlog(cmsys::ofstream& fout, const cmGccDepfileContent& content)
+{
+  for (auto const& dep : content) {
+    fout << '^';
+    bool first = true;
+    for (auto const& rule : dep.rules) {
+      if (!first) {
+        fout << '|';
+      }
+      first = false;
+      fout << cmSystemTools::ConvertToOutputPath(rule);
+    }
+    fout << "\r\n";
+    for (auto const& path : dep.paths) {
+      fout << cmSystemTools::ConvertToOutputPath(path) << "\r\n";
+    }
+  }
+}
+}
+
+bool cmTransformDepfile(cmDepfileFormat format, const std::string& prefix,
+                        const std::string& infile, const std::string& outfile)
+{
+  cmGccDepfileContent content;
+  if (cmSystemTools::FileExists(infile)) {
+    auto result = cmReadGccDepfile(infile.c_str());
+    if (!result) {
+      return false;
+    }
+    content = *std::move(result);
+  }
+
+  for (auto& dep : content) {
+    for (auto& rule : dep.rules) {
+      if (!cmSystemTools::FileIsFullPath(rule)) {
+        rule = cmStrCat(prefix, rule);
+      }
+    }
+    for (auto& path : dep.paths) {
+      if (!cmSystemTools::FileIsFullPath(path)) {
+        path = cmStrCat(prefix, path);
+      }
+    }
+  }
+
+  cmsys::ofstream fout(outfile.c_str());
+  if (!fout) {
+    return false;
+  }
+  switch (format) {
+    case cmDepfileFormat::GccDepfile:
+      WriteGccDepfile(fout, content);
+      break;
+    case cmDepfileFormat::VsTlog:
+      WriteVsTlog(fout, content);
+      break;
+  }
+  return true;
+}
diff --git a/Source/cmTransformDepfile.h b/Source/cmTransformDepfile.h
new file mode 100644
index 0000000..792c1aa
--- /dev/null
+++ b/Source/cmTransformDepfile.h
@@ -0,0 +1,14 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include <string>
+
+enum class cmDepfileFormat
+{
+  GccDepfile,
+  VsTlog,
+};
+
+bool cmTransformDepfile(cmDepfileFormat format, const std::string& prefix,
+                        const std::string& infile, const std::string& outfile);
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 2a14b03..720a567 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -263,7 +263,7 @@ Json::Value cmake::ReportCapabilitiesJson() const
   }
   obj["generators"] = generators;
   obj["fileApi"] = cmFileAPI::ReportCapabilities();
-  obj["serverMode"] = true;
+  obj["serverMode"] = false;
 
   return obj;
 }
diff --git a/Source/cmcmd.cxx b/Source/cmcmd.cxx
index e2ff8b7..ea1f968 100644
--- a/Source/cmcmd.cxx
+++ b/Source/cmcmd.cxx
@@ -20,6 +20,7 @@
 #include "cmStateSnapshot.h"
 #include "cmStringAlgorithms.h"
 #include "cmSystemTools.h"
+#include "cmTransformDepfile.h"
 #include "cmUVProcessChain.h"
 #include "cmUtils.hxx"
 #include "cmVersion.h"
@@ -28,8 +29,6 @@
 #if !defined(CMAKE_BOOTSTRAP)
 #  include "cmDependsFortran.h" // For -E cmake_copy_f90_mod callback.
 #  include "cmFileTime.h"
-#  include "cmServer.h"
-#  include "cmServerConnection.h"
 
 #  include "bindexplib.h"
 #endif
@@ -61,8 +60,6 @@
 #include "cmsys/Process.h"
 #include "cmsys/Terminal.h"
 
-class cmConnection;
-
 int cmcmd_cmake_ninja_depends(std::vector<std::string>::const_iterator argBeg,
                               std::vector<std::string>::const_iterator argEnd);
 int cmcmd_cmake_ninja_dyndep(std::vector<std::string>::const_iterator argBeg,
@@ -121,7 +118,6 @@ void CMakeCommandUsage(const char* program)
        "(on one volume)\n"
     << "  rm [-rRf] <file/dir>...    - remove files or directories, use -f to "
        "force it, r or R to remove directories and their contents recursively\n"
-    << "  server                    - start cmake in server mode\n"
     << "  sleep <number>...         - sleep for given number of seconds\n"
     << "  tar [cxt][vf][zjJ] file.tar [file/dir1 file/dir2 ...]\n"
     << "                            - create or extract a tar or zip archive\n"
@@ -1359,47 +1355,8 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string> const& args,
     }
 
     if (args[1] == "server") {
-      const std::string pipePrefix = "--pipe=";
-      bool supportExperimental = false;
-      bool isDebug = false;
-      std::string pipe;
-
-      for (auto const& arg : cmMakeRange(args).advance(2)) {
-        if (arg == "--experimental") {
-          supportExperimental = true;
-        } else if (arg == "--debug") {
-          pipe.clear();
-          isDebug = true;
-        } else if (cmHasPrefix(arg, pipePrefix)) {
-          isDebug = false;
-          pipe = arg.substr(pipePrefix.size());
-          if (pipe.empty()) {
-            cmSystemTools::Error("No pipe given after --pipe=");
-            return 2;
-          }
-        } else {
-          cmSystemTools::Error("Unknown argument for server mode");
-          return 1;
-        }
-      }
-#if !defined(CMAKE_BOOTSTRAP)
-      cmConnection* conn;
-      if (isDebug) {
-        conn = new cmServerStdIoConnection;
-      } else {
-        conn = new cmServerPipeConnection(pipe);
-      }
-      cmServer server(conn, supportExperimental);
-      std::string errorMessage;
-      if (server.Serve(&errorMessage)) {
-        return 0;
-      }
-      cmSystemTools::Error(errorMessage);
-#else
-      static_cast<void>(supportExperimental);
-      static_cast<void>(isDebug);
-      cmSystemTools::Error("CMake was not built with server mode enabled");
-#endif
+      cmSystemTools::Error(
+        "CMake server mode has been removed in favor of the file-api.");
       return 1;
     }
 
@@ -1435,6 +1392,23 @@ int cmcmd::ExecuteCMakeCommand(std::vector<std::string> const& args,
       return cmcmd::WindowsCEEnvironment("9.0", args[2]);
     }
 #endif
+
+    // Internal depfile transformation
+    if (args[1] == "cmake_transform_depfile" && args.size() == 6) {
+      auto format = cmDepfileFormat::GccDepfile;
+      if (args[2] == "gccdepfile") {
+        format = cmDepfileFormat::GccDepfile;
+      } else if (args[2] == "vstlog") {
+        format = cmDepfileFormat::VsTlog;
+      } else {
+        return 1;
+      }
+      std::string prefix = args[3];
+      if (prefix == "./") {
+        prefix.clear();
+      }
+      return cmTransformDepfile(format, prefix, args[4], args[5]) ? 0 : 1;
+    }
   }
 
   ::CMakeCommandUsage(args[0].c_str());