cmNinjaTargetGenerator: write out export information for the collator

The collator will use this to know where the target's export information
needs to go so that module properties may be provided.

Source/cmNinjaTargetGenerator.cxx

@@ -21,12 +21,16 @@
 
 #include "cmComputeLinkInformation.h"
 #include "cmCustomCommandGenerator.h"
+#include "cmExportBuildFileGenerator.h"
+#include "cmExportSet.h"
 #include "cmFileSet.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGeneratorExpression.h"
 #include "cmGeneratorTarget.h"
 #include "cmGlobalNinjaGenerator.h"
+#include "cmInstallExportGenerator.h"
 #include "cmInstallFileSetGenerator.h"
+#include "cmInstallGenerator.h"
 #include "cmLocalGenerator.h"
 #include "cmLocalNinjaGenerator.h"
 #include "cmMakefile.h"
@@ -42,6 +46,7 @@
 #include "cmStringAlgorithms.h"
 #include "cmSystemTools.h"
 #include "cmTarget.h"
+#include "cmTargetExport.h"
 #include "cmValue.h"
 #include "cmake.h"
 
@@ -1752,6 +1757,80 @@ void cmNinjaTargetGenerator::WriteTargetDependInfo(std::string const& lang,
     }
   }
 
+  tdi["config"] = config;
+
+  // Add information about the export sets that this target is a member of.
+  Json::Value& tdi_exports = tdi["exports"] = Json::arrayValue;
+  std::string export_name = this->GeneratorTarget->GetExportName();
+
+  auto const& all_install_exports =
+    this->GetGlobalGenerator()->GetExportSets();
+  for (auto const& exp : all_install_exports) {
+    // Ignore exports sets which are not for this target.
+    auto const& targets = exp.second.GetTargetExports();
+    auto tgt_export =
+      std::find_if(targets.begin(), targets.end(),
+                   [this](std::unique_ptr<cmTargetExport> const& te) {
+                     return te->Target == this->GeneratorTarget;
+                   });
+    if (tgt_export == targets.end()) {
+      continue;
+    }
+
+    auto const* installs = exp.second.GetInstallations();
+    for (auto const* install : *installs) {
+      Json::Value tdi_export_info = Json::objectValue;
+
+      auto const& ns = install->GetNamespace();
+      auto const& dest = install->GetDestination();
+      auto const& cxxm_dir = install->GetCxxModuleDirectory();
+      auto const& export_prefix = install->GetTempDir();
+
+      tdi_export_info["namespace"] = ns;
+      tdi_export_info["export-name"] = export_name;
+      tdi_export_info["destination"] = dest;
+      tdi_export_info["cxx-module-info-dir"] = cxxm_dir;
+      tdi_export_info["export-prefix"] = export_prefix;
+      tdi_export_info["install"] = true;
+
+      tdi_exports.append(tdi_export_info);
+    }
+  }
+
+  auto const& all_build_exports =
+    this->GetMakefile()->GetExportBuildFileGenerators();
+  for (auto const& exp : all_build_exports) {
+    std::vector<std::string> targets;
+    exp->GetTargets(targets);
+
+    // Ignore exports sets which are not for this target.
+    auto const& name = this->GeneratorTarget->GetName();
+    bool has_current_target =
+      std::any_of(targets.begin(), targets.end(),
+                  [name](std::string const& tname) { return tname == name; });
+    if (!has_current_target) {
+      continue;
+    }
+
+    Json::Value tdi_export_info = Json::objectValue;
+
+    auto const& ns = exp->GetNamespace();
+    auto const& main_fn = exp->GetMainExportFileName();
+    auto const& cxxm_dir = exp->GetCxxModuleDirectory();
+    auto dest = cmsys::SystemTools::GetParentDirectory(main_fn);
+    auto const& export_prefix =
+      cmSystemTools::GetFilenamePath(exp->GetMainExportFileName());
+
+    tdi_export_info["namespace"] = ns;
+    tdi_export_info["export-name"] = export_name;
+    tdi_export_info["destination"] = dest;
+    tdi_export_info["cxx-module-info-dir"] = cxxm_dir;
+    tdi_export_info["export-prefix"] = export_prefix;
+    tdi_export_info["install"] = false;
+
+    tdi_exports.append(tdi_export_info);
+  }
+
   std::string const tdin = this->GetTargetDependInfoPath(lang, config);
   cmGeneratedFileStream tdif(tdin);
   tdif << tdi;

Tests/RunCMake/CXXModules/NinjaDependInfoExport-check.cmake

@@ -0,0 +1,34 @@
+include("${CMAKE_CURRENT_LIST_DIR}/check-json.cmake")
+
+if (RunCMake_GENERATOR_IS_MULTI_CONFIG)
+  set(have_file 0)
+  foreach (config IN ITEMS Release Debug RelWithDebInfo MinSizeRel)
+    if (NOT EXISTS "${RunCMake_TEST_BINARY_DIR}/CMakeFiles/ninja-exports-public.dir/${config}/CXXDependInfo.json")
+      continue ()
+    endif ()
+    set(have_file 1)
+
+    set(CMAKE_BUILD_TYPE "${config}")
+
+    file(READ "${RunCMake_TEST_BINARY_DIR}/CMakeFiles/ninja-exports-public.dir/${config}/CXXDependInfo.json" actual_contents)
+    file(READ "${CMAKE_CURRENT_LIST_DIR}/expect/NinjaDependInfoExport-public.json" expect_contents)
+    check_json("${actual_contents}" "${expect_contents}")
+
+    file(READ "${RunCMake_TEST_BINARY_DIR}/CMakeFiles/ninja-exports-private.dir/${config}/CXXDependInfo.json" actual_contents)
+    file(READ "${CMAKE_CURRENT_LIST_DIR}/expect/NinjaDependInfoExport-private.json" expect_contents)
+    check_json("${actual_contents}" "${expect_contents}")
+  endforeach ()
+
+  if (NOT have_file)
+    list(APPEND RunCMake_TEST_FAILED
+      "No recognized build configurations found.")
+  endif ()
+else ()
+  file(READ "${RunCMake_TEST_BINARY_DIR}/CMakeFiles/ninja-exports-public.dir/CXXDependInfo.json" actual_contents)
+  file(READ "${CMAKE_CURRENT_LIST_DIR}/expect/NinjaDependInfoExport-public.json" expect_contents)
+  check_json("${actual_contents}" "${expect_contents}")
+
+  file(READ "${RunCMake_TEST_BINARY_DIR}/CMakeFiles/ninja-exports-private.dir/CXXDependInfo.json" actual_contents)
+  file(READ "${CMAKE_CURRENT_LIST_DIR}/expect/NinjaDependInfoExport-private.json" expect_contents)
+  check_json("${actual_contents}" "${expect_contents}")
+endif ()

Tests/RunCMake/CXXModules/NinjaDependInfoExport-stderr.txt

@@ -0,0 +1,11 @@
+CMake Warning \(dev\) at NinjaDependInfoExport.cmake:14 \(target_sources\):
+  CMake's C\+\+ module support is experimental.  It is meant only for
+  experimentation and feedback to CMake developers.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:6 \(include\)
+This warning is for project developers.  Use -Wno-dev to suppress it.
+
+CMake Warning \(dev\):
+  C\+\+20 modules support via CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP is
+  experimental.  It is meant only for compiler developers to try.
+This warning is for project developers.  Use -Wno-dev to suppress it.

Tests/RunCMake/CXXModules/NinjaDependInfoExport.cmake

@@ -0,0 +1,85 @@
+# Fake out that we have dyndep; we only need to generate, not actually build
+# here.
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
+set(CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE "")
+
+enable_language(CXX)
+
+if (NOT CMAKE_GENERATOR MATCHES "Ninja")
+  message(FATAL_ERROR
+    "This test requires a 'Ninja' generator to be used.")
+endif ()
+
+add_library(ninja-exports-public)
+target_sources(ninja-exports-public
+  PRIVATE
+    sources/module-impl.cxx
+    sources/module-internal-part-impl.cxx
+    sources/module-part-impl.cxx
+    sources/module-use.cxx
+  PUBLIC
+    FILE_SET modules TYPE CXX_MODULES
+    BASE_DIRS
+      "${CMAKE_CURRENT_SOURCE_DIR}/sources"
+    FILES
+      sources/module.cxx
+      sources/module-part.cxx
+    FILE_SET internal_partitions TYPE CXX_MODULES FILES
+      sources/module-internal-part.cxx)
+target_compile_features(ninja-exports-public
+  PRIVATE
+    cxx_std_20)
+set_property(TARGET ninja-exports-public
+  PROPERTY EXPORT_NAME "with-public")
+
+install(TARGETS ninja-exports-public
+  EXPORT exp
+  FILE_SET modules
+    DESTINATION "lib/cxx"
+    COMPONENT "modules"
+  FILE_SET internal_partitions
+    DESTINATION "lib/cxx/internals"
+    COMPONENT "modules-internal")
+
+add_library(ninja-exports-private)
+target_sources(ninja-exports-private
+  PRIVATE
+    sources/module-impl.cxx
+    sources/module-internal-part-impl.cxx
+    sources/module-part-impl.cxx
+    sources/module-use.cxx
+  PRIVATE
+    FILE_SET modules TYPE CXX_MODULES
+    BASE_DIRS
+      "${CMAKE_CURRENT_SOURCE_DIR}/sources"
+    FILES
+      sources/module.cxx
+      sources/module-part.cxx
+    FILE_SET internal_partitions TYPE CXX_MODULES FILES
+      sources/module-internal-part.cxx)
+target_compile_features(ninja-exports-private
+  PRIVATE
+    cxx_std_20)
+set_property(TARGET ninja-exports-private
+  PROPERTY EXPORT_NAME "with-private")
+
+install(TARGETS ninja-exports-private
+  EXPORT exp)
+
+# Test multiple build exports.
+export(EXPORT exp
+  FILE "${CMAKE_BINARY_DIR}/lib/cmake/export1/export1-targets.cmake"
+  NAMESPACE export1::
+  CXX_MODULES_DIRECTORY "cxx-modules")
+export(EXPORT exp
+  FILE "${CMAKE_BINARY_DIR}/lib/cmake/export2/export2-targets.cmake"
+  CXX_MODULES_DIRECTORY "cxx-modules")
+
+# Test multiple install exports.
+install(EXPORT exp
+  DESTINATION "lib/cmake/export1"
+  NAMESPACE export1::
+  CXX_MODULES_DIRECTORY "cxx-modules")
+install(EXPORT exp
+  DESTINATION "lib/cmake/export2"
+  CXX_MODULES_DIRECTORY "cxx-modules")

Tests/RunCMake/CXXModules/RunCMakeTest.cmake

@@ -77,6 +77,7 @@ run_cmake(ExportInstallCxxModules)
 # Generator-specific tests.
 if (RunCMake_GENERATOR MATCHES "Ninja")
   run_cmake(NinjaDependInfoFileSet)
+  run_cmake(NinjaDependInfoExport)
 else ()
   message(FATAL_ERROR
     "Please add 'DependInfo' tests for the '${RunCMake_GENERATOR}' generator.")

Tests/RunCMake/CXXModules/expect/NinjaDependInfoExport-private.json

@@ -0,0 +1,72 @@
+{
+  "compiler-id": "<IGNORE>",
+  "config": "<CONFIG>",
+  "cxx-modules": {
+    "CMakeFiles/ninja-exports-private.dir/sources/module-internal-part.cxx.o": {
+      "destination": null,
+      "name": "internal_partitions",
+      "relative-directory": "sources",
+      "source": "<SOURCE_DIR>/sources/module-internal-part.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PRIVATE"
+    },
+    "CMakeFiles/ninja-exports-private.dir/sources/module-part.cxx.o": {
+      "destination": null,
+      "name": "modules",
+      "relative-directory": "",
+      "source": "<SOURCE_DIR>/sources/module-part.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PRIVATE"
+    },
+    "CMakeFiles/ninja-exports-private.dir/sources/module.cxx.o": {
+      "destination": null,
+      "name": "modules",
+      "relative-directory": "",
+      "source": "<SOURCE_DIR>/sources/module.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PRIVATE"
+    }
+  },
+  "dir-cur-bld": "<BINARY_DIR>",
+  "dir-cur-src": "<SOURCE_DIR>",
+  "dir-top-bld": "<BINARY_DIR>",
+  "dir-top-src": "<SOURCE_DIR>",
+  "exports": [
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "lib/cmake/export1",
+      "export-name" : "with-private",
+      "export-prefix" : "<BINARY_DIR>/CMakeFiles/Export/d2e2673818fd2bd8c45c0e3ed0e38fcd",
+      "install" : true,
+      "namespace" : "export1::"
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "lib/cmake/export2",
+      "export-name" : "with-private",
+      "export-prefix" : "<BINARY_DIR>/CMakeFiles/Export/28cd47cb4c96ad5cadaa3fb1b0201ae8",
+      "install" : true,
+      "namespace" : ""
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "<BINARY_DIR>/lib/cmake/export1",
+      "export-name" : "with-private",
+      "export-prefix" : "<BINARY_DIR>/lib/cmake/export1",
+      "install" : false,
+      "namespace" : "export1::"
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "<BINARY_DIR>/lib/cmake/export2",
+      "export-name" : "with-private",
+      "export-prefix" : "<BINARY_DIR>/lib/cmake/export2",
+      "install" : false,
+      "namespace" : ""
+    }
+  ],
+  "include-dirs": [],
+  "language": "CXX",
+  "linked-target-dirs": [],
+  "module-dir": "<BINARY_DIR>/CMakeFiles/ninja-exports-private.dir"
+}

Tests/RunCMake/CXXModules/expect/NinjaDependInfoExport-public.json

@@ -0,0 +1,72 @@
+{
+  "compiler-id": "<IGNORE>",
+  "config": "<CONFIG>",
+  "cxx-modules": {
+    "CMakeFiles/ninja-exports-public.dir/sources/module-internal-part.cxx.o": {
+      "destination": "lib/cxx/internals",
+      "name": "internal_partitions",
+      "relative-directory": "sources",
+      "source": "<SOURCE_DIR>/sources/module-internal-part.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PUBLIC"
+    },
+    "CMakeFiles/ninja-exports-public.dir/sources/module-part.cxx.o": {
+      "destination": "lib/cxx",
+      "name": "modules",
+      "relative-directory": "",
+      "source": "<SOURCE_DIR>/sources/module-part.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PUBLIC"
+    },
+    "CMakeFiles/ninja-exports-public.dir/sources/module.cxx.o": {
+      "destination": "lib/cxx",
+      "name": "modules",
+      "relative-directory": "",
+      "source": "<SOURCE_DIR>/sources/module.cxx",
+      "type": "CXX_MODULES",
+      "visibility": "PUBLIC"
+    }
+  },
+  "dir-cur-bld": "<BINARY_DIR>",
+  "dir-cur-src": "<SOURCE_DIR>",
+  "dir-top-bld": "<BINARY_DIR>",
+  "dir-top-src": "<SOURCE_DIR>",
+  "exports": [
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "lib/cmake/export1",
+      "export-name" : "with-public",
+      "export-prefix" : "<BINARY_DIR>/CMakeFiles/Export/d2e2673818fd2bd8c45c0e3ed0e38fcd",
+      "install" : true,
+      "namespace" : "export1::"
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "lib/cmake/export2",
+      "export-name" : "with-public",
+      "export-prefix" : "<BINARY_DIR>/CMakeFiles/Export/28cd47cb4c96ad5cadaa3fb1b0201ae8",
+      "install" : true,
+      "namespace" : ""
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "<BINARY_DIR>/lib/cmake/export1",
+      "export-name" : "with-public",
+      "export-prefix" : "<BINARY_DIR>/lib/cmake/export1",
+      "install" : false,
+      "namespace" : "export1::"
+    },
+    {
+      "cxx-module-info-dir" : "cxx-modules",
+      "destination" : "<BINARY_DIR>/lib/cmake/export2",
+      "export-name" : "with-public",
+      "export-prefix" : "<BINARY_DIR>/lib/cmake/export2",
+      "install" : false,
+      "namespace" : ""
+    }
+  ],
+  "include-dirs": [],
+  "language": "CXX",
+  "linked-target-dirs": [],
+  "module-dir": "<BINARY_DIR>/CMakeFiles/ninja-exports-public.dir"
+}

Tests/RunCMake/CXXModules/expect/NinjaDependInfoFileSet-private.json

@@ -31,6 +31,7 @@
   "dir-cur-src": "<SOURCE_DIR>",
   "dir-top-bld": "<BINARY_DIR>",
   "dir-top-src": "<SOURCE_DIR>",
+  "exports": [],
   "include-dirs": [],
   "language": "CXX",
   "linked-target-dirs": [],

Tests/RunCMake/CXXModules/expect/NinjaDependInfoFileSet-public.json

@@ -31,6 +31,7 @@
   "dir-cur-src": "<SOURCE_DIR>",
   "dir-top-bld": "<BINARY_DIR>",
   "dir-top-src": "<SOURCE_DIR>",
+  "exports": [],
   "include-dirs": [],
   "language": "CXX",
   "linked-target-dirs": [],