1 files changed, 169 insertions, 0 deletions
diff --git a/Source/cmExportLibraryDependenciesCommand.cxx b/Source/cmExportLibraryDependenciesCommand.cxx
new file mode 100644
index 0000000..0a0646c
--- /dev/null
+++ b/Source/cmExportLibraryDependenciesCommand.cxx
@@ -0,0 +1,169 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmExportLibraryDependenciesCommand.h"
+
+#include "cmsys/FStream.hxx"
+#include <map>
+#include <memory> // IWYU pragma: keep
+#include <utility>
+
+#include "cmAlgorithms.h"
+#include "cmGeneratedFileStream.h"
+#include "cmGlobalGenerator.h"
+#include "cmMakefile.h"
+#include "cmStateTypes.h"
+#include "cmSystemTools.h"
+#include "cmTarget.h"
+#include "cmTargetLinkLibraryType.h"
+#include "cmake.h"
+
+class cmExecutionStatus;
+
+bool cmExportLibraryDependenciesCommand::InitialPass(
+  std::vector<std::string> const& args, cmExecutionStatus&)
+{
+  if (args.empty()) {
+    this->SetError("called with incorrect number of arguments");
+    return false;
+  }
+
+  // store the arguments for the final pass
+  this->Filename = args[0];
+  this->Append = false;
+  if (args.size() > 1) {
+    if (args[1] == "APPEND") {
+      this->Append = true;
+    }
+  }
+  return true;
+}
+
+void cmExportLibraryDependenciesCommand::FinalPass()
+{
+  // export_library_dependencies() shouldn't modify anything
+  // ensure this by calling a const method
+  this->ConstFinalPass();
+}
+
+void cmExportLibraryDependenciesCommand::ConstFinalPass() const
+{
+  // Use copy-if-different if not appending.
+  std::unique_ptr<cmsys::ofstream> foutPtr;
+  if (this->Append) {
+    const auto openmodeApp = std::ios::app;
+    foutPtr =
+      cm::make_unique<cmsys::ofstream>(this->Filename.c_str(), openmodeApp);
+  } else {
+    std::unique_ptr<cmGeneratedFileStream> ap(
+      new cmGeneratedFileStream(this->Filename, true));
+    ap->SetCopyIfDifferent(true);
+    foutPtr = std::move(ap);
+  }
+  std::ostream& fout = *foutPtr;
+
+  if (!fout) {
+    cmSystemTools::Error("Error Writing " + this->Filename);
+    cmSystemTools::ReportLastSystemError("");
+    return;
+  }
+
+  // Collect dependency information about all library targets built in
+  // the project.
+  cmake* cm = this->Makefile->GetCMakeInstance();
+  cmGlobalGenerator* global = cm->GetGlobalGenerator();
+  const std::vector<cmMakefile*>& locals = global->GetMakefiles();
+  std::map<std::string, std::string> libDepsOld;
+  std::map<std::string, std::string> libDepsNew;
+  std::map<std::string, std::string> libTypes;
+  for (cmMakefile* local : locals) {
+    const cmTargets& tgts = local->GetTargets();
+    for (auto const& tgt : tgts) {
+      // Get the current target.
+      cmTarget const& target = tgt.second;
+
+      // Skip non-library targets.
+      if (target.GetType() < cmStateEnums::STATIC_LIBRARY ||
+          target.GetType() > cmStateEnums::MODULE_LIBRARY) {
+        continue;
+      }
+
+      // Construct the dependency variable name.
+      std::string targetEntry = target.GetName();
+      targetEntry += "_LIB_DEPENDS";
+
+      // Construct the dependency variable value with the direct link
+      // dependencies.
+      std::string valueOld;
+      std::string valueNew;
+      cmTarget::LinkLibraryVectorType const& libs =
+        target.GetOriginalLinkLibraries();
+      for (cmTarget::LibraryID const& li : libs) {
+        std::string ltVar = li.first;
+        ltVar += "_LINK_TYPE";
+        std::string ltValue;
+        switch (li.second) {
+          case GENERAL_LibraryType:
+            valueNew += "general;";
+            ltValue = "general";
+            break;
+          case DEBUG_LibraryType:
+            valueNew += "debug;";
+            ltValue = "debug";
+            break;
+          case OPTIMIZED_LibraryType:
+            valueNew += "optimized;";
+            ltValue = "optimized";
+            break;
+        }
+        std::string lib = li.first;
+        if (cmTarget* libtgt = global->FindTarget(lib)) {
+          // Handle simple output name changes.  This command is
+          // deprecated so we do not support full target name
+          // translation (which requires per-configuration info).
+          if (const char* outname = libtgt->GetProperty("OUTPUT_NAME")) {
+            lib = outname;
+          }
+        }
+        valueOld += lib;
+        valueOld += ";";
+        valueNew += lib;
+        valueNew += ";";
+
+        std::string& ltEntry = libTypes[ltVar];
+        if (ltEntry.empty()) {
+          ltEntry = ltValue;
+        } else if (ltEntry != ltValue) {
+          ltEntry = "general";
+        }
+      }
+      libDepsNew[targetEntry] = valueNew;
+      libDepsOld[targetEntry] = valueOld;
+    }
+  }
+
+  // Generate dependency information for both old and new style CMake
+  // versions.
+  const char* vertest =
+    "\"${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}\" GREATER 2.4";
+  fout << "# Generated by CMake\n\n";
+  fout << "if(" << vertest << ")\n";
+  fout << "  # Information for CMake 2.6 and above.\n";
+  for (auto const& i : libDepsNew) {
+    if (!i.second.empty()) {
+      fout << "  set(\"" << i.first << "\" \"" << i.second << "\")\n";
+    }
+  }
+  fout << "else()\n";
+  fout << "  # Information for CMake 2.4 and lower.\n";
+  for (auto const& i : libDepsOld) {
+    if (!i.second.empty()) {
+      fout << "  set(\"" << i.first << "\" \"" << i.second << "\")\n";
+    }
+  }
+  for (auto const& i : libTypes) {
+    if (i.second != "general") {
+      fout << "  set(\"" << i.first << "\" \"" << i.second << "\")\n";
+    }
+  }
+  fout << "endif()\n";
+}