Autogen: Add and use cmQtAutoGenerator base class

Adds the new base class `cmQtAutoGenerator` which contains common
variables and methods used by `cmQtAutoGeneratorMocUic` and
`cmQtAutoGeneratorRcc`.

8 files changed, 487 insertions, 759 deletions

diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index cddef68..6b086fa 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -312,6 +312,8 @@ set(SRCS
   cmQtAutoGen.cxx
   cmQtAutoGen.h
   cmQtAutoGenDigest.h
+  cmQtAutoGenerator.cxx
+  cmQtAutoGenerator.h
   cmQtAutoGeneratorInitializer.cxx
   cmQtAutoGeneratorInitializer.h
   cmQtAutoGeneratorMocUic.cxx
diff --git a/Source/cmQtAutoGenerator.cxx b/Source/cmQtAutoGenerator.cxx
new file mode 100644
index 0000000..52193af
--- /dev/null
+++ b/Source/cmQtAutoGenerator.cxx
@@ -0,0 +1,320 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmQtAutoGen.h"
+#include "cmQtAutoGenerator.h"
+
+#include "cmsys/FStream.hxx"
+#include "cmsys/Terminal.h"
+
+#include "cmAlgorithms.h"
+#include "cmGlobalGenerator.h"
+#include "cmMakefile.h"
+#include "cmStateDirectory.h"
+#include "cmStateSnapshot.h"
+#include "cmSystemTools.h"
+#include "cmake.h"
+
+// -- Static functions
+
+static std::string HeadLine(std::string const& title)
+{
+  std::string head = title;
+  head += '\n';
+  head.append(head.size() - 1, '-');
+  head += '\n';
+  return head;
+}
+
+static std::string QuotedCommand(std::vector<std::string> const& command)
+{
+  std::string res;
+  for (std::string const& item : command) {
+    if (!res.empty()) {
+      res.push_back(' ');
+    }
+    std::string const cesc = cmQtAutoGen::Quoted(item);
+    if (item.empty() || (cesc.size() > (item.size() + 2)) ||
+        (cesc.find(' ') != std::string::npos)) {
+      res += cesc;
+    } else {
+      res += item;
+    }
+  }
+  return res;
+}
+
+// -- Class methods
+
+cmQtAutoGenerator::cmQtAutoGenerator()
+  : Verbose(cmSystemTools::HasEnv("VERBOSE"))
+  , ColorOutput(true)
+{
+  {
+    std::string colorEnv;
+    cmSystemTools::GetEnv("COLOR", colorEnv);
+    if (!colorEnv.empty()) {
+      this->ColorOutput = cmSystemTools::IsOn(colorEnv.c_str());
+    }
+  }
+}
+
+bool cmQtAutoGenerator::Run(std::string const& infoFile,
+                            std::string const& config)
+{
+  // Info settings
+  this->InfoFile = infoFile;
+  cmSystemTools::ConvertToUnixSlashes(this->InfoFile);
+  this->InfoDir = cmSystemTools::GetFilenamePath(infoFile);
+  this->InfoConfig = config;
+
+  cmake cm(cmake::RoleScript);
+  cm.SetHomeOutputDirectory(this->InfoDir);
+  cm.SetHomeDirectory(this->InfoDir);
+  cm.GetCurrentSnapshot().SetDefaultDefinitions();
+  cmGlobalGenerator gg(&cm);
+
+  cmStateSnapshot snapshot = cm.GetCurrentSnapshot();
+  snapshot.GetDirectory().SetCurrentBinary(this->InfoDir);
+  snapshot.GetDirectory().SetCurrentSource(this->InfoDir);
+
+  auto makefile = cm::make_unique<cmMakefile>(&gg, snapshot);
+  gg.SetCurrentMakefile(makefile.get());
+
+  return this->Process(makefile.get());
+}
+
+void cmQtAutoGenerator::LogBold(std::string const& message) const
+{
+  cmSystemTools::MakefileColorEcho(cmsysTerminal_Color_ForegroundBlue |
+                                     cmsysTerminal_Color_ForegroundBold,
+                                   message.c_str(), true, this->ColorOutput);
+}
+
+void cmQtAutoGenerator::LogInfo(cmQtAutoGen::Generator genType,
+                                std::string const& message) const
+{
+  std::string msg = cmQtAutoGen::GeneratorName(genType);
+  msg += ": ";
+  msg += message;
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  cmSystemTools::Stdout(msg.c_str(), msg.size());
+}
+
+void cmQtAutoGenerator::LogWarning(cmQtAutoGen::Generator genType,
+                                   std::string const& message) const
+{
+  std::string msg = cmQtAutoGen::GeneratorName(genType);
+  msg += " warning:";
+  if (message.find('\n') == std::string::npos) {
+    // Single line message
+    msg.push_back(' ');
+  } else {
+    // Multi line message
+    msg.push_back('\n');
+  }
+  // Message
+  msg += message;
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  msg.push_back('\n');
+  cmSystemTools::Stdout(msg.c_str(), msg.size());
+}
+
+void cmQtAutoGenerator::LogFileWarning(cmQtAutoGen::Generator genType,
+                                       std::string const& filename,
+                                       std::string const& message) const
+{
+  std::string msg = "  ";
+  msg += cmQtAutoGen::Quoted(filename);
+  msg.push_back('\n');
+  // Message
+  msg += message;
+  this->LogWarning(genType, msg);
+}
+
+void cmQtAutoGenerator::LogError(cmQtAutoGen::Generator genType,
+                                 std::string const& message) const
+{
+  std::string msg;
+  msg.push_back('\n');
+  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " error");
+  // Message
+  msg += message;
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  msg.push_back('\n');
+  cmSystemTools::Stderr(msg.c_str(), msg.size());
+}
+
+void cmQtAutoGenerator::LogFileError(cmQtAutoGen::Generator genType,
+                                     std::string const& filename,
+                                     std::string const& message) const
+{
+  std::string emsg = "  ";
+  emsg += cmQtAutoGen::Quoted(filename);
+  emsg += '\n';
+  // Message
+  emsg += message;
+  this->LogError(genType, emsg);
+}
+
+void cmQtAutoGenerator::LogCommandError(
+  cmQtAutoGen::Generator genType, std::string const& message,
+  std::vector<std::string> const& command, std::string const& output) const
+{
+  std::string msg;
+  msg.push_back('\n');
+  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " subprocess error");
+  msg += message;
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  msg.push_back('\n');
+  msg += HeadLine("Command");
+  msg += QuotedCommand(command);
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  msg.push_back('\n');
+  msg += HeadLine("Output");
+  msg += output;
+  if (msg.back() != '\n') {
+    msg.push_back('\n');
+  }
+  msg.push_back('\n');
+  cmSystemTools::Stderr(msg.c_str(), msg.size());
+}
+
+/**
+ * @brief Generates the parent directory of the given file on demand
+ * @return True on success
+ */
+bool cmQtAutoGenerator::MakeParentDirectory(cmQtAutoGen::Generator genType,
+                                            std::string const& filename) const
+{
+  bool success = true;
+  std::string const dirName = cmSystemTools::GetFilenamePath(filename);
+  if (!dirName.empty()) {
+    if (!cmSystemTools::MakeDirectory(dirName)) {
+      this->LogFileError(genType, filename,
+                         "Could not create parent directory");
+      success = false;
+    }
+  }
+  return success;
+}
+
+/**
+ * @brief Tests if buildFile is older than sourceFile
+ * @return True if buildFile  is older than sourceFile.
+ *         False may indicate an error.
+ */
+bool cmQtAutoGenerator::FileIsOlderThan(std::string const& buildFile,
+                                        std::string const& sourceFile,
+                                        std::string* error)
+{
+  int result = 0;
+  if (cmSystemTools::FileTimeCompare(buildFile, sourceFile, &result)) {
+    return (result < 0);
+  }
+  if (error != nullptr) {
+    error->append(
+      "File modification time comparison failed for the files\n  ");
+    error->append(cmQtAutoGen::Quoted(buildFile));
+    error->append("\nand\n  ");
+    error->append(cmQtAutoGen::Quoted(sourceFile));
+  }
+  return false;
+}
+
+bool cmQtAutoGenerator::FileRead(std::string& content,
+                                 std::string const& filename,
+                                 std::string* error)
+{
+  bool success = false;
+  if (cmSystemTools::FileExists(filename)) {
+    std::size_t const length = cmSystemTools::FileLength(filename);
+    cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
+    if (ifs) {
+      content.resize(length);
+      ifs.read(&content.front(), content.size());
+      if (ifs) {
+        success = true;
+      } else {
+        content.clear();
+        if (error != nullptr) {
+          error->append("Reading from the file failed.");
+        }
+      }
+    } else if (error != nullptr) {
+      error->append("Opening the file for reading failed.");
+    }
+  } else if (error != nullptr) {
+    error->append("The file does not exist.");
+  }
+  return success;
+}
+
+bool cmQtAutoGenerator::FileWrite(cmQtAutoGen::Generator genType,
+                                  std::string const& filename,
+                                  std::string const& content)
+{
+  std::string error;
+  // Make sure the parent directory exists
+  if (this->MakeParentDirectory(genType, filename)) {
+    cmsys::ofstream outfile;
+    outfile.open(filename.c_str(),
+                 (std::ios::out | std::ios::binary | std::ios::trunc));
+    if (outfile) {
+      outfile << content;
+      // Check for write errors
+      if (!outfile.good()) {
+        error = "File writing failed";
+      }
+    } else {
+      error = "Opening file for writing failed";
+    }
+  }
+  if (!error.empty()) {
+    this->LogFileError(genType, filename, error);
+    return false;
+  }
+  return true;
+}
+
+bool cmQtAutoGenerator::FileDiffers(std::string const& filename,
+                                    std::string const& content)
+{
+  bool differs = true;
+  {
+    std::string oldContents;
+    if (this->FileRead(oldContents, filename)) {
+      differs = (oldContents != content);
+    }
+  }
+  return differs;
+}
+
+/**
+ * @brief Runs a command and returns true on success
+ * @return True on success
+ */
+bool cmQtAutoGenerator::RunCommand(std::vector<std::string> const& command,
+                                   std::string& output) const
+{
+  // Log command
+  if (this->Verbose) {
+    std::string qcmd = QuotedCommand(command);
+    qcmd.push_back('\n');
+    cmSystemTools::Stdout(qcmd.c_str(), qcmd.size());
+  }
+  // Execute command
+  int retVal = 0;
+  bool res = cmSystemTools::RunSingleCommand(
+    command, &output, &output, &retVal, nullptr, cmSystemTools::OUTPUT_NONE);
+  return (res && (retVal == 0));
+}
diff --git a/Source/cmQtAutoGenerator.h b/Source/cmQtAutoGenerator.h
new file mode 100644
index 0000000..285340d
--- /dev/null
+++ b/Source/cmQtAutoGenerator.h
@@ -0,0 +1,76 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmQtAutoGenerator_h
+#define cmQtAutoGenerator_h
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include "cmQtAutoGen.h"
+
+#include <string>
+#include <vector>
+
+class cmMakefile;
+
+class cmQtAutoGenerator
+{
+  CM_DISABLE_COPY(cmQtAutoGenerator)
+public:
+  cmQtAutoGenerator();
+  virtual ~cmQtAutoGenerator() = default;
+  bool Run(std::string const& infoFile, std::string const& config);
+
+  std::string const& GetInfoFile() const { return InfoFile; }
+  std::string const& GetInfoDir() const { return InfoDir; }
+  std::string const& GetInfoConfig() const { return InfoConfig; }
+  bool GetVerbose() const { return Verbose; }
+
+protected:
+  // -- Central processing
+  virtual bool Process(cmMakefile* makefile) = 0;
+
+  // -- Log info
+  void LogBold(std::string const& message) const;
+  void LogInfo(cmQtAutoGen::Generator genType,
+               std::string const& message) const;
+  // -- Log warning
+  void LogWarning(cmQtAutoGen::Generator genType,
+                  std::string const& message) const;
+  void LogFileWarning(cmQtAutoGen::Generator genType,
+                      std::string const& filename,
+                      std::string const& message) const;
+  // -- Log error
+  void LogError(cmQtAutoGen::Generator genType,
+                std::string const& message) const;
+  void LogFileError(cmQtAutoGen::Generator genType,
+                    std::string const& filename,
+                    std::string const& message) const;
+  void LogCommandError(cmQtAutoGen::Generator genType,
+                       std::string const& message,
+                       std::vector<std::string> const& command,
+                       std::string const& output) const;
+  // -- Utility
+  bool MakeParentDirectory(cmQtAutoGen::Generator genType,
+                           std::string const& filename) const;
+  bool FileIsOlderThan(std::string const& buildFile,
+                       std::string const& sourceFile,
+                       std::string* error = nullptr);
+  bool FileRead(std::string& content, std::string const& filename,
+                std::string* error = nullptr);
+  bool FileWrite(cmQtAutoGen::Generator genType, std::string const& filename,
+                 std::string const& content);
+  bool FileDiffers(std::string const& filename, std::string const& content);
+  bool RunCommand(std::vector<std::string> const& command,
+                  std::string& output) const;
+
+private:
+  // -- Info settings
+  std::string InfoFile;
+  std::string InfoDir;
+  std::string InfoConfig;
+  // -- Settings
+  bool Verbose;
+  bool ColorOutput;
+};
+
+#endif
diff --git a/Source/cmQtAutoGeneratorInitializer.cxx b/Source/cmQtAutoGeneratorInitializer.cxx
index 9477bc3..1d18bad 100644
--- a/Source/cmQtAutoGeneratorInitializer.cxx
+++ b/Source/cmQtAutoGeneratorInitializer.cxx
@@ -1061,7 +1061,7 @@ void cmQtAutoGeneratorInitializer::InitializeAutogenTarget(
       currentLine.push_back(cmSystemTools::GetCMakeCommand());
       currentLine.push_back("-E");
       currentLine.push_back("cmake_autogen");
-      currentLine.push_back(autogenInfoDir);
+      currentLine.push_back(autogenInfoDir + "/AutogenInfo.cmake");
       currentLine.push_back("$<CONFIGURATION>");
       commandLines.push_back(std::move(currentLine));
     }
@@ -1197,12 +1197,19 @@ void cmQtAutoGeneratorInitializer::SetupAutoGenerateTarget(
                        cmQtAutoGen::MultiConfigName(multiConfig));
   AddDefinitionEscaped(makefile, "_build_dir",
                        GetAutogenTargetBuildDir(target));
-  AddDefinitionEscaped(makefile, "_sources", digest.Sources);
-  AddDefinitionEscaped(makefile, "_headers", digest.Headers);
   AddDefinitionEscaped(makefile, "_qt_version_major", digest.QtVersionMajor);
   AddDefinitionEscaped(makefile, "_qt_version_minor", digest.QtVersionMinor);
   {
     if (digest.MocEnabled || digest.UicEnabled) {
+      {
+        std::string settingsFile = GetAutogenTargetFilesDir(target);
+        cmSystemTools::ConvertToUnixSlashes(settingsFile);
+        settingsFile += "/AutogenOldSettings.cmake";
+        AddDefinitionEscaped(makefile, "_settings_file", settingsFile);
+      }
+      AddDefinitionEscaped(makefile, "_sources", digest.Sources);
+      AddDefinitionEscaped(makefile, "_headers", digest.Headers);
+
       SetupAcquireSkipFiles(digest, setup);
       if (digest.MocEnabled) {
         SetupAutoTargetMoc(digest, configDefault, configsList, setup);
diff --git a/Source/cmQtAutoGeneratorMocUic.cxx b/Source/cmQtAutoGeneratorMocUic.cxx
index 36fc090..ea99b1f 100644
--- a/Source/cmQtAutoGeneratorMocUic.cxx
+++ b/Source/cmQtAutoGeneratorMocUic.cxx
@@ -3,8 +3,6 @@
 #include "cmQtAutoGen.h"
 #include "cmQtAutoGeneratorMocUic.h"
 
-#include "cmsys/FStream.hxx"
-#include "cmsys/Terminal.h"
 #include <algorithm>
 #include <array>
 #include <list>
@@ -15,12 +13,8 @@
 
 #include "cmAlgorithms.h"
 #include "cmCryptoHash.h"
-#include "cmFilePathChecksum.h"
-#include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
 #include "cmOutputConverter.h"
-#include "cmStateDirectory.h"
-#include "cmStateSnapshot.h"
 #include "cmSystemTools.h"
 #include "cmake.h"
 
@@ -35,33 +29,6 @@ static const char* SettingsKeyUic = "AM_UIC_SETTINGS_HASH";
 
 // -- Static functions
 
-static std::string HeadLine(std::string const& title)
-{
-  std::string head = title;
-  head += '\n';
-  head.append(head.size() - 1, '-');
-  head += '\n';
-  return head;
-}
-
-static std::string QuotedCommand(std::vector<std::string> const& command)
-{
-  std::string res;
-  for (std::string const& item : command) {
-    if (!res.empty()) {
-      res.push_back(' ');
-    }
-    std::string const cesc = cmQtAutoGen::Quoted(item);
-    if (item.empty() || (cesc.size() > (item.size() + 2)) ||
-        (cesc.find(' ') != std::string::npos)) {
-      res += cesc;
-    } else {
-      res += item;
-    }
-  }
-  return res;
-}
-
 static std::string SubDirPrefix(std::string const& fileName)
 {
   std::string res(cmSystemTools::GetFilenamePath(fileName));
@@ -71,56 +38,6 @@ static std::string SubDirPrefix(std::string const& fileName)
   return res;
 }
 
-static bool ReadFile(std::string& content, std::string const& filename,
-                     std::string* error = nullptr)
-{
-  bool success = false;
-  if (cmSystemTools::FileExists(filename)) {
-    std::size_t const length = cmSystemTools::FileLength(filename);
-    cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
-    if (ifs) {
-      content.resize(length);
-      ifs.read(&content.front(), content.size());
-      if (ifs) {
-        success = true;
-      } else {
-        content.clear();
-        if (error != nullptr) {
-          error->append("Reading from the file failed.");
-        }
-      }
-    } else if (error != nullptr) {
-      error->append("Opening the file for reading failed.");
-    }
-  } else if (error != nullptr) {
-    error->append("The file does not exist.");
-  }
-  return success;
-}
-
-/**
- * @brief Tests if buildFile is older than sourceFile
- * @return True if buildFile  is older than sourceFile.
- *         False may indicate an error.
- */
-static bool FileIsOlderThan(std::string const& buildFile,
-                            std::string const& sourceFile,
-                            std::string* error = nullptr)
-{
-  int result = 0;
-  if (cmSystemTools::FileTimeCompare(buildFile, sourceFile, &result)) {
-    return (result < 0);
-  }
-  if (error != nullptr) {
-    error->append(
-      "File modification time comparison failed for the files\n  ");
-    error->append(cmQtAutoGen::Quoted(buildFile));
-    error->append("\nand\n  ");
-    error->append(cmQtAutoGen::Quoted(sourceFile));
-  }
-  return false;
-}
-
 static bool ListContains(std::vector<std::string> const& list,
                          std::string const& entry)
 {
@@ -132,21 +49,11 @@ static bool ListContains(std::vector<std::string> const& list,
 cmQtAutoGeneratorMocUic::cmQtAutoGeneratorMocUic()
   : MultiConfig(cmQtAutoGen::WRAP)
   , IncludeProjectDirsBefore(false)
-  , Verbose(cmSystemTools::HasEnv("VERBOSE"))
-  , ColorOutput(true)
   , MocSettingsChanged(false)
   , MocPredefsChanged(false)
   , MocRelaxedMode(false)
   , UicSettingsChanged(false)
 {
-  {
-    std::string colorEnv;
-    cmSystemTools::GetEnv("COLOR", colorEnv);
-    if (!colorEnv.empty()) {
-      this->ColorOutput = cmSystemTools::IsOn(colorEnv.c_str());
-    }
-  }
-
   // Precompile regular expressions
   this->MocRegExpInclude.compile(
     "[\n][ \t]*#[ \t]*include[ \t]+"
@@ -155,39 +62,7 @@ cmQtAutoGeneratorMocUic::cmQtAutoGeneratorMocUic()
                                  "[\"<](([^ \">]+/)?ui_[^ \">/]+\\.h)[\">]");
 }
 
-bool cmQtAutoGeneratorMocUic::Run(std::string const& targetDirectory,
-                                  std::string const& config)
-{
-  cmake cm(cmake::RoleScript);
-  cm.SetHomeOutputDirectory(targetDirectory);
-  cm.SetHomeDirectory(targetDirectory);
-  cm.GetCurrentSnapshot().SetDefaultDefinitions();
-  cmGlobalGenerator gg(&cm);
-
-  cmStateSnapshot snapshot = cm.GetCurrentSnapshot();
-  snapshot.GetDirectory().SetCurrentBinary(targetDirectory);
-  snapshot.GetDirectory().SetCurrentSource(targetDirectory);
-
-  auto makefile = cm::make_unique<cmMakefile>(&gg, snapshot);
-  gg.SetCurrentMakefile(makefile.get());
-
-  bool success = false;
-  if (this->InitInfoFile(makefile.get(), targetDirectory, config)) {
-    // Read latest settings
-    this->SettingsFileRead(makefile.get());
-    if (this->Process()) {
-      // Write current settings
-      if (this->SettingsFileWrite()) {
-        success = true;
-      }
-    }
-  }
-  return success;
-}
-
-bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
-                                           std::string const& targetDirectory,
-                                           std::string const& config)
+bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile)
 {
   // -- Meta
   this->HeaderExtensions = makefile->GetCMakeInstance()->GetHeaderExtensions();
@@ -231,12 +106,12 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
     }
     return lists;
   };
-  auto InfoGetConfig = [makefile, &config](const char* key) -> std::string {
+  auto InfoGetConfig = [makefile, this](const char* key) -> std::string {
     const char* valueConf = nullptr;
     {
       std::string keyConf = key;
       keyConf += '_';
-      keyConf += config;
+      keyConf += this->GetInfoConfig();
       valueConf = makefile->GetDefinition(keyConf);
     }
     if (valueConf == nullptr) {
@@ -252,11 +127,8 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
   };
 
   // -- Read info file
-  this->InfoFile = cmSystemTools::CollapseFullPath(targetDirectory);
-  cmSystemTools::ConvertToUnixSlashes(this->InfoFile);
-  this->InfoFile += "/AutogenInfo.cmake";
-  if (!makefile->ReadListFile(this->InfoFile.c_str())) {
-    this->LogFileError(cmQtAutoGen::GEN, this->InfoFile,
+  if (!makefile->ReadListFile(this->GetInfoFile().c_str())) {
+    this->LogFileError(cmQtAutoGen::GEN, this->GetInfoFile(),
                        "File processing failed");
     return false;
   }
@@ -266,7 +138,19 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
   this->ConfigSuffix = InfoGetConfig("AM_CONFIG_SUFFIX");
   if (this->ConfigSuffix.empty()) {
     this->ConfigSuffix = "_";
-    this->ConfigSuffix += config;
+    this->ConfigSuffix += this->GetInfoConfig();
+  }
+
+  this->SettingsFile = InfoGetConfig("AM_SETTINGS_FILE");
+  if (!this->SettingsFile.empty()) {
+    if (this->MultiConfig != cmQtAutoGen::SINGLE) {
+      this->SettingsFile = cmQtAutoGen::AppendFilenameSuffix(
+        this->SettingsFile, this->ConfigSuffix);
+    }
+  } else {
+    this->LogFileError(cmQtAutoGen::GEN, this->GetInfoFile(),
+                       "Settings file is missing");
+    return false;
   }
 
   // - Files and directories
@@ -278,7 +162,7 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
     InfoGetBool("AM_CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE");
   this->AutogenBuildDir = InfoGet("AM_BUILD_DIR");
   if (this->AutogenBuildDir.empty()) {
-    this->LogFileError(cmQtAutoGen::GEN, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::GEN, this->GetInfoFile(),
                        "Autogen build directory missing");
     return false;
   }
@@ -291,7 +175,7 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
 
   // Check Qt version
   if ((this->QtMajorVersion != "4") && (this->QtMajorVersion != "5")) {
-    this->LogFileError(cmQtAutoGen::GEN, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::GEN, this->GetInfoFile(),
                        "Unsupported Qt version: " +
                          cmQtAutoGen::Quoted(this->QtMajorVersion));
     return false;
@@ -341,7 +225,7 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
         }
       } else {
         this->LogFileError(
-          cmQtAutoGen::MOC, this->InfoFile,
+          cmQtAutoGen::MOC, this->GetInfoFile(),
           "AUTOMOC_DEPEND_FILTERS list size is not a multiple of 2");
         return false;
       }
@@ -362,7 +246,7 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
         std::ostringstream ost;
         ost << "files/options lists sizes missmatch (" << sources.size() << "/"
             << options.size() << ")";
-        this->LogFileError(cmQtAutoGen::UIC, this->InfoFile, ost.str());
+        this->LogFileError(cmQtAutoGen::UIC, this->GetInfoFile(), ost.str());
         return false;
       }
       auto fitEnd = sources.cend();
@@ -535,17 +419,6 @@ bool cmQtAutoGeneratorMocUic::InitInfoFile(cmMakefile* makefile,
     }
   }
 
-  // - Old settings file
-  {
-    this->SettingsFile = cmSystemTools::CollapseFullPath(targetDirectory);
-    cmSystemTools::ConvertToUnixSlashes(this->SettingsFile);
-    this->SettingsFile += "/AutogenOldSettings";
-    if (this->MultiConfig != cmQtAutoGen::SINGLE) {
-      this->SettingsFile += this->ConfigSuffix;
-    }
-    this->SettingsFile += ".cmake";
-  }
-
   return true;
 }
 
@@ -614,7 +487,7 @@ bool cmQtAutoGeneratorMocUic::SettingsFileWrite()
   bool success = true;
   // Only write if any setting changed
   if (this->SettingsChanged()) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       this->LogInfo(cmQtAutoGen::GEN, "Writing settings file " +
                       cmQtAutoGen::Quoted(this->SettingsFile));
     }
@@ -644,7 +517,7 @@ bool cmQtAutoGeneratorMocUic::SettingsFileWrite()
   return success;
 }
 
-bool cmQtAutoGeneratorMocUic::Process()
+bool cmQtAutoGeneratorMocUic::Process(cmMakefile* makefile)
 {
   // the program goes through all .cpp files to see which moc files are
   // included. It is not really interesting how the moc file is named, but
@@ -654,6 +527,12 @@ bool cmQtAutoGeneratorMocUic::Process()
   // moc file is included anywhere a moc_<filename>.cpp file is created and
   // included in the mocs_compilation.cpp file.
 
+  if (!this->InitInfoFile(makefile)) {
+    return false;
+  }
+  // Read latest settings
+  this->SettingsFileRead(makefile);
+
   // Create AUTOGEN include directory
   {
     std::string const incDirAbs = cmSystemTools::CollapseCombinedPath(
@@ -690,6 +569,10 @@ bool cmQtAutoGeneratorMocUic::Process()
     return false;
   }
 
+  if (!this->SettingsFileWrite()) {
+    return false;
+  }
+
   return true;
 }
 
@@ -701,7 +584,7 @@ bool cmQtAutoGeneratorMocUic::ParseSourceFile(std::string const& absFilename,
 {
   std::string contentText;
   std::string error;
-  bool success = ReadFile(contentText, absFilename, &error);
+  bool success = this->FileRead(contentText, absFilename, &error);
   if (success) {
     if (!contentText.empty()) {
       if (job.Moc) {
@@ -729,7 +612,7 @@ bool cmQtAutoGeneratorMocUic::ParseHeaderFile(std::string const& absFilename,
 {
   std::string contentText;
   std::string error;
-  bool success = ReadFile(contentText, absFilename, &error);
+  bool success = this->FileRead(contentText, absFilename, &error);
   if (success) {
     if (!contentText.empty()) {
       if (job.Moc) {
@@ -760,7 +643,7 @@ bool cmQtAutoGeneratorMocUic::ParsePostprocess()
     if (!item->DependsValid) {
       std::string content;
       std::string error;
-      if (ReadFile(content, item->SourceFile, &error)) {
+      if (this->FileRead(content, item->SourceFile, &error)) {
         this->MocFindDepends(item->SourceFile, content, item->Depends);
         item->DependsValid = true;
       } else {
@@ -968,7 +851,7 @@ void cmQtAutoGeneratorMocUic::MocFindDepends(std::string const& absFilename,
       std::string incFile;
       if (this->MocFindIncludedFile(incFile, sourcePath, match)) {
         depends.insert(incFile);
-        if (this->Verbose) {
+        if (this->GetVerbose()) {
           this->LogInfo(cmQtAutoGen::MOC, "Found dependency:\n  " +
                           cmQtAutoGen::Quoted(absFilename) + "\n  " +
                           cmQtAutoGen::Quoted(incFile));
@@ -988,7 +871,7 @@ void cmQtAutoGeneratorMocUic::MocFindDepends(std::string const& absFilename,
 bool cmQtAutoGeneratorMocUic::MocParseSourceContent(
   std::string const& absFilename, std::string const& contentText)
 {
-  if (this->Verbose) {
+  if (this->GetVerbose()) {
     this->LogInfo(cmQtAutoGen::MOC, "Checking: " + absFilename);
   }
 
@@ -1227,7 +1110,7 @@ bool cmQtAutoGeneratorMocUic::MocParseSourceContent(
 void cmQtAutoGeneratorMocUic::MocParseHeaderContent(
   std::string const& absFilename, std::string const& contentText)
 {
-  if (this->Verbose) {
+  if (this->GetVerbose()) {
     this->LogInfo(cmQtAutoGen::MOC, "Checking: " + absFilename);
   }
 
@@ -1312,7 +1195,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateAll()
   if (!this->MocPredefsCmd.empty()) {
     if (this->MocSettingsChanged ||
         !cmSystemTools::FileExists(this->MocPredefsFileAbs)) {
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         this->LogBold("Generating MOC predefs " + this->MocPredefsFileRel);
       }
 
@@ -1347,7 +1230,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateAll()
         }
       } else {
         // Touch to update the time stamp
-        if (this->Verbose) {
+        if (this->GetVerbose()) {
           this->LogInfo(cmQtAutoGen::MOC,
                         "Touching moc_predefs " + this->MocPredefsFileRel);
         }
@@ -1398,7 +1281,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateAll()
 
     if (this->FileDiffers(this->MocCompFileAbs, mocs)) {
       // Actually write mocs compilation file
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         this->LogBold("Generating MOC compilation " + this->MocCompFileRel);
       }
       if (!this->FileWrite(cmQtAutoGen::MOC, this->MocCompFileAbs, mocs)) {
@@ -1408,7 +1291,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateAll()
       }
     } else if (autoNameGenerated) {
       // Only touch mocs compilation file
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         this->LogInfo(cmQtAutoGen::MOC,
                       "Touching mocs compilation " + this->MocCompFileRel);
       }
@@ -1433,7 +1316,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
   bool generate = false;
   std::string generateReason;
   if (!generate && !cmSystemTools::FileExists(mocFileAbs.c_str())) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(mocFileAbs);
       generateReason += " from its source file ";
@@ -1443,7 +1326,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
     generate = true;
   }
   if (!generate && this->MocSettingsChanged) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(mocFileAbs);
       generateReason += " from ";
@@ -1453,7 +1336,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
     generate = true;
   }
   if (!generate && this->MocPredefsChanged) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(mocFileAbs);
       generateReason += " from ";
@@ -1465,7 +1348,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
   if (!generate) {
     std::string error;
     if (FileIsOlderThan(mocFileAbs, mocJob.SourceFile, &error)) {
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         generateReason = "Generating ";
         generateReason += cmQtAutoGen::Quoted(mocFileAbs);
         generateReason += " because it's older than its source file ";
@@ -1484,7 +1367,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
     std::string error;
     for (std::string const& depFile : mocJob.Depends) {
       if (FileIsOlderThan(mocFileAbs, depFile, &error)) {
-        if (this->Verbose) {
+        if (this->GetVerbose()) {
           generateReason = "Generating ";
           generateReason += cmQtAutoGen::Quoted(mocFileAbs);
           generateReason += " from ";
@@ -1505,7 +1388,7 @@ bool cmQtAutoGeneratorMocUic::MocGenerateFile(const MocJobAuto& mocJob,
 
   if (generate) {
     // Log
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       this->LogBold("Generating MOC source " + mocJob.BuildFileRel);
       this->LogInfo(cmQtAutoGen::MOC, generateReason);
     }
@@ -1569,7 +1452,7 @@ bool cmQtAutoGeneratorMocUic::UicSkip(std::string const& absFilename) const
 bool cmQtAutoGeneratorMocUic::UicParseContent(std::string const& absFilename,
                                               std::string const& contentText)
 {
-  if (this->Verbose) {
+  if (this->GetVerbose()) {
     this->LogInfo(cmQtAutoGen::UIC, "Checking: " + absFilename);
   }
 
@@ -1755,7 +1638,7 @@ bool cmQtAutoGeneratorMocUic::UicGenerateFile(const UicJob& uicJob)
   bool generate = false;
   std::string generateReason;
   if (!generate && !cmSystemTools::FileExists(uicFileAbs.c_str())) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(uicFileAbs);
       generateReason += " from its source file ";
@@ -1765,7 +1648,7 @@ bool cmQtAutoGeneratorMocUic::UicGenerateFile(const UicJob& uicJob)
     generate = true;
   }
   if (!generate && this->UicSettingsChanged) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(uicFileAbs);
       generateReason += " from ";
@@ -1777,7 +1660,7 @@ bool cmQtAutoGeneratorMocUic::UicGenerateFile(const UicJob& uicJob)
   if (!generate) {
     std::string error;
     if (FileIsOlderThan(uicFileAbs, uicJob.SourceFile, &error)) {
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         generateReason = "Generating ";
         generateReason += cmQtAutoGen::Quoted(uicFileAbs);
         generateReason += " because it's older than its source file ";
@@ -1793,7 +1676,7 @@ bool cmQtAutoGeneratorMocUic::UicGenerateFile(const UicJob& uicJob)
   }
   if (generate) {
     // Log
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       this->LogBold("Generating UIC header " + uicJob.BuildFileRel);
       this->LogInfo(cmQtAutoGen::UIC, generateReason);
     }
@@ -1839,191 +1722,6 @@ bool cmQtAutoGeneratorMocUic::UicGenerateFile(const UicJob& uicJob)
   return success;
 }
 
-void cmQtAutoGeneratorMocUic::LogBold(std::string const& message) const
-{
-  cmSystemTools::MakefileColorEcho(cmsysTerminal_Color_ForegroundBlue |
-                                     cmsysTerminal_Color_ForegroundBold,
-                                   message.c_str(), true, this->ColorOutput);
-}
-
-void cmQtAutoGeneratorMocUic::LogInfo(cmQtAutoGen::Generator genType,
-                                      std::string const& message) const
-{
-  std::string msg = cmQtAutoGen::GeneratorName(genType);
-  msg += ": ";
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  cmSystemTools::Stdout(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorMocUic::LogWarning(cmQtAutoGen::Generator genType,
-                                         std::string const& message) const
-{
-  std::string msg = cmQtAutoGen::GeneratorName(genType);
-  msg += " warning:";
-  if (message.find('\n') == std::string::npos) {
-    // Single line message
-    msg.push_back(' ');
-  } else {
-    // Multi line message
-    msg.push_back('\n');
-  }
-  // Message
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stdout(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorMocUic::LogFileWarning(cmQtAutoGen::Generator genType,
-                                             std::string const& filename,
-                                             std::string const& message) const
-{
-  std::string msg = "  ";
-  msg += cmQtAutoGen::Quoted(filename);
-  msg.push_back('\n');
-  // Message
-  msg += message;
-  this->LogWarning(genType, msg);
-}
-
-void cmQtAutoGeneratorMocUic::LogError(cmQtAutoGen::Generator genType,
-                                       std::string const& message) const
-{
-  std::string msg;
-  msg.push_back('\n');
-  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " error");
-  // Message
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stderr(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorMocUic::LogFileError(cmQtAutoGen::Generator genType,
-                                           std::string const& filename,
-                                           std::string const& message) const
-{
-  std::string emsg = "  ";
-  emsg += cmQtAutoGen::Quoted(filename);
-  emsg += '\n';
-  // Message
-  emsg += message;
-  this->LogError(genType, emsg);
-}
-
-void cmQtAutoGeneratorMocUic::LogCommandError(
-  cmQtAutoGen::Generator genType, std::string const& message,
-  std::vector<std::string> const& command, std::string const& output) const
-{
-  std::string msg;
-  msg.push_back('\n');
-  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " subprocess error");
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  msg += HeadLine("Command");
-  msg += QuotedCommand(command);
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  msg += HeadLine("Output");
-  msg += output;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stderr(msg.c_str(), msg.size());
-}
-
-/**
- * @brief Generates the parent directory of the given file on demand
- * @return True on success
- */
-bool cmQtAutoGeneratorMocUic::MakeParentDirectory(
-  cmQtAutoGen::Generator genType, std::string const& filename) const
-{
-  bool success = true;
-  std::string const dirName = cmSystemTools::GetFilenamePath(filename);
-  if (!dirName.empty()) {
-    if (!cmSystemTools::MakeDirectory(dirName)) {
-      this->LogFileError(genType, filename,
-                         "Could not create parent directory");
-      success = false;
-    }
-  }
-  return success;
-}
-
-bool cmQtAutoGeneratorMocUic::FileDiffers(std::string const& filename,
-                                          std::string const& content)
-{
-  bool differs = true;
-  {
-    std::string oldContents;
-    if (ReadFile(oldContents, filename)) {
-      differs = (oldContents != content);
-    }
-  }
-  return differs;
-}
-
-bool cmQtAutoGeneratorMocUic::FileWrite(cmQtAutoGen::Generator genType,
-                                        std::string const& filename,
-                                        std::string const& content)
-{
-  std::string error;
-  // Make sure the parent directory exists
-  if (this->MakeParentDirectory(genType, filename)) {
-    cmsys::ofstream outfile;
-    outfile.open(filename.c_str(),
-                 (std::ios::out | std::ios::binary | std::ios::trunc));
-    if (outfile) {
-      outfile << content;
-      // Check for write errors
-      if (!outfile.good()) {
-        error = "File writing failed";
-      }
-    } else {
-      error = "Opening file for writing failed";
-    }
-  }
-  if (!error.empty()) {
-    this->LogFileError(genType, filename, error);
-    return false;
-  }
-  return true;
-}
-
-/**
- * @brief Runs a command and returns true on success
- * @return True on success
- */
-bool cmQtAutoGeneratorMocUic::RunCommand(
-  std::vector<std::string> const& command, std::string& output) const
-{
-  // Log command
-  if (this->Verbose) {
-    std::string qcmd = QuotedCommand(command);
-    qcmd.push_back('\n');
-    cmSystemTools::Stdout(qcmd.c_str(), qcmd.size());
-  }
-  // Execute command
-  int retVal = 0;
-  bool res = cmSystemTools::RunSingleCommand(
-    command, &output, &output, &retVal, nullptr, cmSystemTools::OUTPUT_NONE);
-  return (res && (retVal == 0));
-}
-
 /**
  * @brief Tries to find the header file to the given file base path by
  * appending different header extensions
diff --git a/Source/cmQtAutoGeneratorMocUic.h b/Source/cmQtAutoGeneratorMocUic.h
index 579b4f4..a03270b 100644
--- a/Source/cmQtAutoGeneratorMocUic.h
+++ b/Source/cmQtAutoGeneratorMocUic.h
@@ -7,6 +7,7 @@
 
 #include "cmFilePathChecksum.h"
 #include "cmQtAutoGen.h"
+#include "cmQtAutoGenerator.h"
 #include "cmsys/RegularExpression.hxx"
 
 #include <map>
@@ -17,12 +18,11 @@
 
 class cmMakefile;
 
-class cmQtAutoGeneratorMocUic
+class cmQtAutoGeneratorMocUic : public cmQtAutoGenerator
 {
   CM_DISABLE_COPY(cmQtAutoGeneratorMocUic)
 public:
   cmQtAutoGeneratorMocUic();
-  bool Run(std::string const& targetDirectory, std::string const& config);
 
 private:
   // -- Types
@@ -81,8 +81,7 @@ private:
   };
 
   // -- Initialization
-  bool InitInfoFile(cmMakefile* makefile, std::string const& targetDirectory,
-                    std::string const& config);
+  bool InitInfoFile(cmMakefile* makefile);
 
   // -- Settings file
   void SettingsFileRead(cmMakefile* makefile);
@@ -93,7 +92,7 @@ private:
   }
 
   // -- Central processing
-  bool Process();
+  bool Process(cmMakefile* makefile) override;
 
   // -- Source parsing
   bool ParseSourceFile(std::string const& absFilename, const SourceJob& job);
@@ -136,45 +135,14 @@ private:
   bool UicGenerateAll();
   bool UicGenerateFile(const UicJob& uicJob);
 
-  // -- Log info
-  void LogBold(std::string const& message) const;
-  void LogInfo(cmQtAutoGen::Generator genType,
-               std::string const& message) const;
-  // -- Log warning
-  void LogWarning(cmQtAutoGen::Generator genType,
-                  std::string const& message) const;
-  void LogFileWarning(cmQtAutoGen::Generator genType,
-                      std::string const& filename,
-                      std::string const& message) const;
-  // -- Log error
-  void LogError(cmQtAutoGen::Generator genType,
-                std::string const& message) const;
-  void LogFileError(cmQtAutoGen::Generator genType,
-                    std::string const& filename,
-                    std::string const& message) const;
-  void LogCommandError(cmQtAutoGen::Generator genType,
-                       std::string const& message,
-                       std::vector<std::string> const& command,
-                       std::string const& output) const;
-
   // -- Utility
-  bool MakeParentDirectory(cmQtAutoGen::Generator genType,
-                           std::string const& filename) const;
-  bool FileDiffers(std::string const& filename, std::string const& content);
-  bool FileWrite(cmQtAutoGen::Generator genType, std::string const& filename,
-                 std::string const& content);
   bool FindHeader(std::string& header, std::string const& testBasePath) const;
-  bool RunCommand(std::vector<std::string> const& command,
-                  std::string& output) const;
 
   // -- Meta
-  std::string InfoFile;
   std::string ConfigSuffix;
   cmQtAutoGen::MultiConfig MultiConfig;
   // -- Settings
   bool IncludeProjectDirsBefore;
-  bool Verbose;
-  bool ColorOutput;
   std::string SettingsFile;
   std::string SettingsStringMoc;
   std::string SettingsStringUic;
diff --git a/Source/cmQtAutoGeneratorRcc.cxx b/Source/cmQtAutoGeneratorRcc.cxx
index e057937..4348f2b 100644
--- a/Source/cmQtAutoGeneratorRcc.cxx
+++ b/Source/cmQtAutoGeneratorRcc.cxx
@@ -3,146 +3,22 @@
 #include "cmQtAutoGen.h"
 #include "cmQtAutoGeneratorRcc.h"
 
-#include "cmsys/FStream.hxx"
-#include "cmsys/Terminal.h"
-
 #include "cmAlgorithms.h"
 #include "cmCryptoHash.h"
-#include "cmFilePathChecksum.h"
-#include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
 #include "cmOutputConverter.h"
-#include "cmStateDirectory.h"
-#include "cmStateSnapshot.h"
 #include "cmSystemTools.h"
-#include "cmake.h"
-
-#if defined(__APPLE__)
-#include <unistd.h>
-#endif
 
 // -- Static variables
 
 static const char* SettingsKeyRcc = "ARCC_SETTINGS_HASH";
 
-// -- Static functions
-
-static std::string HeadLine(std::string const& title)
-{
-  std::string head = title;
-  head += '\n';
-  head.append(head.size() - 1, '-');
-  head += '\n';
-  return head;
-}
-
-static std::string QuotedCommand(std::vector<std::string> const& command)
-{
-  std::string res;
-  for (std::string const& item : command) {
-    if (!res.empty()) {
-      res.push_back(' ');
-    }
-    std::string const cesc = cmQtAutoGen::Quoted(item);
-    if (item.empty() || (cesc.size() > (item.size() + 2)) ||
-        (cesc.find(' ') != std::string::npos)) {
-      res += cesc;
-    } else {
-      res += item;
-    }
-  }
-  return res;
-}
-
-static bool ReadFile(std::string& content, std::string const& filename,
-                     std::string* error = nullptr)
-{
-  bool success = false;
-  if (cmSystemTools::FileExists(filename)) {
-    std::size_t const length = cmSystemTools::FileLength(filename);
-    cmsys::ifstream ifs(filename.c_str(), (std::ios::in | std::ios::binary));
-    if (ifs) {
-      content.resize(length);
-      ifs.read(&content.front(), content.size());
-      if (ifs) {
-        success = true;
-      } else {
-        content.clear();
-        if (error != nullptr) {
-          error->append("Reading from the file failed.");
-        }
-      }
-    } else if (error != nullptr) {
-      error->append("Opening the file for reading failed.");
-    }
-  } else if (error != nullptr) {
-    error->append("The file does not exist.");
-  }
-  return success;
-}
-
-/**
- * @brief Tests if buildFile is older than sourceFile
- * @return True if buildFile  is older than sourceFile.
- *         False may indicate an error.
- */
-static bool FileIsOlderThan(std::string const& buildFile,
-                            std::string const& sourceFile,
-                            std::string* error = nullptr)
-{
-  int result = 0;
-  if (cmSystemTools::FileTimeCompare(buildFile, sourceFile, &result)) {
-    return (result < 0);
-  }
-  if (error != nullptr) {
-    error->append(
-      "File modification time comparison failed for the files\n  ");
-    error->append(cmQtAutoGen::Quoted(buildFile));
-    error->append("\nand\n  ");
-    error->append(cmQtAutoGen::Quoted(sourceFile));
-  }
-  return false;
-}
-
 // -- Class methods
 
 cmQtAutoGeneratorRcc::cmQtAutoGeneratorRcc()
   : MultiConfig(cmQtAutoGen::WRAP)
-  , Verbose(cmSystemTools::HasEnv("VERBOSE"))
-  , ColorOutput(true)
   , SettingsChanged(false)
 {
-  {
-    std::string colorEnv;
-    cmSystemTools::GetEnv("COLOR", colorEnv);
-    if (!colorEnv.empty()) {
-      this->ColorOutput = cmSystemTools::IsOn(colorEnv.c_str());
-    }
-  }
-}
-
-bool cmQtAutoGeneratorRcc::Run(std::string const& infoFile,
-                               std::string const& config)
-{
-  // Info settings
-  this->InfoFile = infoFile;
-  this->InfoDir = cmSystemTools::GetFilenamePath(infoFile);
-  this->InfoConfig = config;
-
-  cmake cm(cmake::RoleScript);
-  cm.SetHomeOutputDirectory(this->InfoDir);
-  cm.SetHomeDirectory(this->InfoDir);
-  cm.GetCurrentSnapshot().SetDefaultDefinitions();
-  cmGlobalGenerator gg(&cm);
-
-  cmStateSnapshot snapshot = cm.GetCurrentSnapshot();
-  snapshot.GetDirectory().SetCurrentBinary(this->InfoDir);
-  snapshot.GetDirectory().SetCurrentSource(this->InfoDir);
-
-  auto makefile = cm::make_unique<cmMakefile>(&gg, snapshot);
-  gg.SetCurrentMakefile(makefile.get());
-
-  return this->Process(makefile.get());
 }
 
 bool cmQtAutoGeneratorRcc::InfoFileRead(cmMakefile* makefile)
@@ -161,7 +37,7 @@ bool cmQtAutoGeneratorRcc::InfoFileRead(cmMakefile* makefile)
     {
       std::string keyConf = key;
       keyConf += '_';
-      keyConf += this->InfoConfig;
+      keyConf += this->GetInfoConfig();
       valueConf = makefile->GetDefinition(keyConf);
     }
     if (valueConf == nullptr) {
@@ -177,8 +53,8 @@ bool cmQtAutoGeneratorRcc::InfoFileRead(cmMakefile* makefile)
   };
 
   // -- Read info file
-  if (!makefile->ReadListFile(this->InfoFile.c_str())) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+  if (!makefile->ReadListFile(this->GetInfoFile().c_str())) {
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "File processing failed");
     return false;
   }
@@ -189,7 +65,7 @@ bool cmQtAutoGeneratorRcc::InfoFileRead(cmMakefile* makefile)
   this->ConfigSuffix = InfoGetConfig("ARCC_CONFIG_SUFFIX");
   if (this->ConfigSuffix.empty()) {
     this->ConfigSuffix = "_";
-    this->ConfigSuffix += this->InfoConfig;
+    this->ConfigSuffix += this->GetInfoConfig();
   }
 
   this->SettingsFile = InfoGetConfig("ARCC_SETTINGS_FILE");
@@ -219,27 +95,27 @@ bool cmQtAutoGeneratorRcc::InfoFileRead(cmMakefile* makefile)
 
   // - Validity checks
   if (this->SettingsFile.empty()) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "Settings file name missing");
     return false;
   }
   if (this->AutogenBuildDir.empty()) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "Autogen build directory missing");
     return false;
   }
   if (this->RccExecutable.empty()) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "rcc executable missing");
     return false;
   }
   if (this->QrcFile.empty()) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "rcc input file missing");
     return false;
   }
   if (this->RccFile.empty()) {
-    this->LogFileError(cmQtAutoGen::RCC, this->InfoFile,
+    this->LogFileError(cmQtAutoGen::RCC, this->GetInfoFile(),
                        "rcc output file missing");
     return false;
   }
@@ -304,7 +180,7 @@ bool cmQtAutoGeneratorRcc::SettingsFileWrite()
   bool success = true;
   // Only write if any setting changed
   if (this->SettingsChanged) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       this->LogInfo(cmQtAutoGen::RCC, "Writing settings file " +
                       cmQtAutoGen::Quoted(this->SettingsFile));
     }
@@ -392,7 +268,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
     success = false;
   }
   if (success && !generate && !cmSystemTools::FileExists(rccFileAbs.c_str())) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(rccFileAbs);
       generateReason += " from its source file ";
@@ -402,7 +278,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
     generate = true;
   }
   if (success && !generate && this->SettingsChanged) {
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       generateReason = "Generating ";
       generateReason += cmQtAutoGen::Quoted(rccFileAbs);
       generateReason += " from ";
@@ -414,7 +290,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
   if (success && !generate) {
     std::string error;
     if (FileIsOlderThan(rccFileAbs, this->QrcFile, &error)) {
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         generateReason = "Generating ";
         generateReason += cmQtAutoGen::Quoted(rccFileAbs);
         generateReason += " because it is older than ";
@@ -457,7 +333,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
           break;
         }
         if (FileIsOlderThan(rccFileAbs, resFile, &error)) {
-          if (this->Verbose) {
+          if (this->GetVerbose()) {
             generateReason = "Generating ";
             generateReason += cmQtAutoGen::Quoted(rccFileAbs);
             generateReason += " from ";
@@ -482,7 +358,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
   // Regenerate on demand
   if (generate) {
     // Log
-    if (this->Verbose) {
+    if (this->GetVerbose()) {
       this->LogBold("Generating RCC source " + rccFileRel);
       this->LogInfo(cmQtAutoGen::RCC, generateReason);
     }
@@ -531,7 +407,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
     // Write content to file
     if (this->FileDiffers(wrapperFileAbs, content)) {
       // Write new wrapper file
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         this->LogBold("Generating RCC wrapper " + wrapperFileRel);
       }
       if (!this->FileWrite(cmQtAutoGen::RCC, wrapperFileAbs, content)) {
@@ -541,7 +417,7 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
       }
     } else if (rccGenerated) {
       // Just touch the wrapper file
-      if (this->Verbose) {
+      if (this->GetVerbose()) {
         this->LogInfo(cmQtAutoGen::RCC,
                       "Touching RCC wrapper " + wrapperFileRel);
       }
@@ -551,188 +427,3 @@ bool cmQtAutoGeneratorRcc::RccGenerate()
 
   return success;
 }
-
-void cmQtAutoGeneratorRcc::LogBold(std::string const& message) const
-{
-  cmSystemTools::MakefileColorEcho(cmsysTerminal_Color_ForegroundBlue |
-                                     cmsysTerminal_Color_ForegroundBold,
-                                   message.c_str(), true, this->ColorOutput);
-}
-
-void cmQtAutoGeneratorRcc::LogInfo(cmQtAutoGen::Generator genType,
-                                   std::string const& message) const
-{
-  std::string msg = cmQtAutoGen::GeneratorName(genType);
-  msg += ": ";
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  cmSystemTools::Stdout(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorRcc::LogWarning(cmQtAutoGen::Generator genType,
-                                      std::string const& message) const
-{
-  std::string msg = cmQtAutoGen::GeneratorName(genType);
-  msg += " warning:";
-  if (message.find('\n') == std::string::npos) {
-    // Single line message
-    msg.push_back(' ');
-  } else {
-    // Multi line message
-    msg.push_back('\n');
-  }
-  // Message
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stdout(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorRcc::LogFileWarning(cmQtAutoGen::Generator genType,
-                                          std::string const& filename,
-                                          std::string const& message) const
-{
-  std::string msg = "  ";
-  msg += cmQtAutoGen::Quoted(filename);
-  msg.push_back('\n');
-  // Message
-  msg += message;
-  this->LogWarning(genType, msg);
-}
-
-void cmQtAutoGeneratorRcc::LogError(cmQtAutoGen::Generator genType,
-                                    std::string const& message) const
-{
-  std::string msg;
-  msg.push_back('\n');
-  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " error");
-  // Message
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stderr(msg.c_str(), msg.size());
-}
-
-void cmQtAutoGeneratorRcc::LogFileError(cmQtAutoGen::Generator genType,
-                                        std::string const& filename,
-                                        std::string const& message) const
-{
-  std::string emsg = "  ";
-  emsg += cmQtAutoGen::Quoted(filename);
-  emsg += '\n';
-  // Message
-  emsg += message;
-  this->LogError(genType, emsg);
-}
-
-void cmQtAutoGeneratorRcc::LogCommandError(
-  cmQtAutoGen::Generator genType, std::string const& message,
-  std::vector<std::string> const& command, std::string const& output) const
-{
-  std::string msg;
-  msg.push_back('\n');
-  msg += HeadLine(cmQtAutoGen::GeneratorName(genType) + " subprocess error");
-  msg += message;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  msg += HeadLine("Command");
-  msg += QuotedCommand(command);
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  msg += HeadLine("Output");
-  msg += output;
-  if (msg.back() != '\n') {
-    msg.push_back('\n');
-  }
-  msg.push_back('\n');
-  cmSystemTools::Stderr(msg.c_str(), msg.size());
-}
-
-/**
- * @brief Generates the parent directory of the given file on demand
- * @return True on success
- */
-bool cmQtAutoGeneratorRcc::MakeParentDirectory(
-  cmQtAutoGen::Generator genType, std::string const& filename) const
-{
-  bool success = true;
-  std::string const dirName = cmSystemTools::GetFilenamePath(filename);
-  if (!dirName.empty()) {
-    if (!cmSystemTools::MakeDirectory(dirName)) {
-      this->LogFileError(genType, filename,
-                         "Could not create parent directory");
-      success = false;
-    }
-  }
-  return success;
-}
-
-bool cmQtAutoGeneratorRcc::FileDiffers(std::string const& filename,
-                                       std::string const& content)
-{
-  bool differs = true;
-  {
-    std::string oldContents;
-    if (ReadFile(oldContents, filename)) {
-      differs = (oldContents != content);
-    }
-  }
-  return differs;
-}
-
-bool cmQtAutoGeneratorRcc::FileWrite(cmQtAutoGen::Generator genType,
-                                     std::string const& filename,
-                                     std::string const& content)
-{
-  std::string error;
-  // Make sure the parent directory exists
-  if (this->MakeParentDirectory(genType, filename)) {
-    cmsys::ofstream outfile;
-    outfile.open(filename.c_str(),
-                 (std::ios::out | std::ios::binary | std::ios::trunc));
-    if (outfile) {
-      outfile << content;
-      // Check for write errors
-      if (!outfile.good()) {
-        error = "File writing failed";
-      }
-    } else {
-      error = "Opening file for writing failed";
-    }
-  }
-  if (!error.empty()) {
-    this->LogFileError(genType, filename, error);
-    return false;
-  }
-  return true;
-}
-
-/**
- * @brief Runs a command and returns true on success
- * @return True on success
- */
-bool cmQtAutoGeneratorRcc::RunCommand(std::vector<std::string> const& command,
-                                      std::string& output) const
-{
-  // Log command
-  if (this->Verbose) {
-    std::string qcmd = QuotedCommand(command);
-    qcmd.push_back('\n');
-    cmSystemTools::Stdout(qcmd.c_str(), qcmd.size());
-  }
-  // Execute command
-  int retVal = 0;
-  bool res = cmSystemTools::RunSingleCommand(
-    command, &output, &output, &retVal, nullptr, cmSystemTools::OUTPUT_NONE);
-  return (res && (retVal == 0));
-}
diff --git a/Source/cmQtAutoGeneratorRcc.h b/Source/cmQtAutoGeneratorRcc.h
index 4539461..804d117 100644
--- a/Source/cmQtAutoGeneratorRcc.h
+++ b/Source/cmQtAutoGeneratorRcc.h
@@ -7,18 +7,18 @@
 
 #include "cmFilePathChecksum.h"
 #include "cmQtAutoGen.h"
+#include "cmQtAutoGenerator.h"
 
 #include <string>
 #include <vector>
 
 class cmMakefile;
 
-class cmQtAutoGeneratorRcc
+class cmQtAutoGeneratorRcc : public cmQtAutoGenerator
 {
   CM_DISABLE_COPY(cmQtAutoGeneratorRcc)
 public:
   cmQtAutoGeneratorRcc();
-  bool Run(std::string const& infoFile, std::string const& config);
 
 private:
   // -- Initialization & settings
@@ -26,47 +26,13 @@ private:
   void SettingsFileRead(cmMakefile* makefile);
   bool SettingsFileWrite();
   // -- Central processing
-  bool Process(cmMakefile* makefile);
+  bool Process(cmMakefile* makefile) override;
   bool RccGenerate();
-  // -- Log info
-  void LogBold(std::string const& message) const;
-  void LogInfo(cmQtAutoGen::Generator genType,
-               std::string const& message) const;
-  // -- Log warning
-  void LogWarning(cmQtAutoGen::Generator genType,
-                  std::string const& message) const;
-  void LogFileWarning(cmQtAutoGen::Generator genType,
-                      std::string const& filename,
-                      std::string const& message) const;
-  // -- Log error
-  void LogError(cmQtAutoGen::Generator genType,
-                std::string const& message) const;
-  void LogFileError(cmQtAutoGen::Generator genType,
-                    std::string const& filename,
-                    std::string const& message) const;
-  void LogCommandError(cmQtAutoGen::Generator genType,
-                       std::string const& message,
-                       std::vector<std::string> const& command,
-                       std::string const& output) const;
-  // -- Utility
-  bool MakeParentDirectory(cmQtAutoGen::Generator genType,
-                           std::string const& filename) const;
-  bool FileDiffers(std::string const& filename, std::string const& content);
-  bool FileWrite(cmQtAutoGen::Generator genType, std::string const& filename,
-                 std::string const& content);
-  bool RunCommand(std::vector<std::string> const& command,
-                  std::string& output) const;
 
-  // -- Info settings
-  std::string InfoFile;
-  std::string InfoDir;
-  std::string InfoConfig;
   // -- Config settings
   std::string ConfigSuffix;
   cmQtAutoGen::MultiConfig MultiConfig;
   // -- Settings
-  bool Verbose;
-  bool ColorOutput;
   bool SettingsChanged;
   std::string SettingsFile;
   std::string SettingsString;