cmSystemTools: Add CMake config directory

Source/cmSystemTools.cxx

@@ -86,6 +86,9 @@
 
 #if defined(_WIN32)
 #  include <windows.h>
+
+#  include <knownfolders.h>
+#  include <shlobj.h>
 // include wincrypt.h after windows.h
 #  include <wincrypt.h>
 #else
@@ -2671,6 +2674,50 @@ std::string const& cmSystemTools::GetHTMLDoc()
   return cmSystemToolsHTMLDoc;
 }
 
+cm::optional<std::string> cmSystemTools::GetSystemConfigDirectory()
+{
+#if defined(_WIN32)
+  LPWSTR lpwstr;
+  if (FAILED(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0, NULL, &lpwstr))) {
+    return cm::nullopt;
+  }
+  std::wstring wstr = std::wstring(lpwstr);
+  CoTaskMemFree(lpwstr);
+  std::string config = cmsys::Encoding::ToNarrow(wstr);
+  cmSystemTools::ConvertToUnixSlashes(config);
+  return config;
+#else
+  auto config = cmSystemTools::GetEnvVar("XDG_CONFIG_HOME");
+  if (!config.has_value()) {
+    config = cmSystemTools::GetEnvVar("HOME");
+    if (config.has_value()) {
+#  if defined(__APPLE__)
+      config = cmStrCat(config.value(), "/Library/Application Support");
+#  else
+      config = cmStrCat(config.value(), "/.config");
+#  endif
+    }
+  }
+  return config;
+#endif
+}
+
+cm::optional<std::string> cmSystemTools::GetCMakeConfigDirectory()
+{
+  auto config = cmSystemTools::GetEnvVar("CMAKE_CONFIG_DIR");
+  if (!config.has_value()) {
+    config = cmSystemTools::GetSystemConfigDirectory();
+    if (config.has_value()) {
+#if defined(_WIN32) || defined(__APPLE__)
+      config = cmStrCat(config.value(), "/CMake");
+#else
+      config = cmStrCat(config.value(), "/cmake");
+#endif
+    }
+  }
+  return config;
+}
+
 std::string cmSystemTools::GetCurrentWorkingDirectory()
 {
   return cmSystemTools::CollapseFullPath(

Source/cmSystemTools.h

@@ -524,6 +524,10 @@ public:
   static std::string const& GetCMakeRoot();
   static std::string const& GetHTMLDoc();
 
+  /** Get the CMake config directory **/
+  static cm::optional<std::string> GetSystemConfigDirectory();
+  static cm::optional<std::string> GetCMakeConfigDirectory();
+
   /** Get the CWD mapped through the KWSys translation map.  */
   static std::string GetCurrentWorkingDirectory();
 

Source/cmakemain.cxx

@@ -17,6 +17,7 @@
 #include <vector>
 
 #include <cm/memory>
+#include <cm/optional>
 #include <cmext/algorithm>
 
 #include <cm3p/uv.h>
@@ -1071,6 +1072,13 @@ int main(int ac, char const* const* av)
     if (strcmp(av[1], "-E") == 0) {
       return do_command(ac, av, std::move(consoleBuf));
     }
+    if (strcmp(av[1], "--print-config-dir") == 0) {
+      std::cout << cmSystemTools::ConvertToOutputPath(
+                     cmSystemTools::GetCMakeConfigDirectory().value_or(
+                       std::string()))
+                << std::endl;
+      return 0;
+    }
   }
   int ret = do_cmake(ac, av);
 #ifndef CMAKE_BOOTSTRAP

Tests/RunCMake/CommandLine/RunCMakeTest.cmake

@@ -1128,3 +1128,17 @@ if(RunCMake_GENERATOR MATCHES "^Visual Studio 12 2013")
 endif()
 
 run_cmake_with_options(help-arbitrary "--help" "CMAKE_CXX_IGNORE_EXTENSIONS")
+
+if (WIN32 OR DEFINED ENV{HOME})
+  set(config_dir_test print-config-dir)
+  if (WIN32)
+    set(config_dir_test print-config-dir-win)
+  elseif(APPLE)
+    set(config_dir_test print-config-dir-apple)
+  endif()
+  unset(ENV{CMAKE_CONFIG_DIR})
+  unset(ENV{XDG_CONFIG_HOME})
+  run_cmake_command(${config_dir_test} ${CMAKE_COMMAND} "--print-config-dir")
+endif()
+set(ENV{CMAKE_CONFIG_DIR} cmake_config_dir)
+run_cmake_command(print-config-dir-env ${CMAKE_COMMAND} "--print-config-dir")

Tests/RunCMake/CommandLine/print-config-dir-apple-stdout.txt

@@ -0,0 +1 @@
+.*Library/Application\\ Support/CMake$

Tests/RunCMake/CommandLine/print-config-dir-env-stdout.txt

@@ -0,0 +1 @@
+cmake_config_dir

Tests/RunCMake/CommandLine/print-config-dir-stdout.txt

@@ -0,0 +1 @@
+.*config/cmake$

Tests/RunCMake/CommandLine/print-config-dir-win-stdout.txt

@@ -0,0 +1 @@
+.*AppData\\Local\\CMake$

bootstrap

@@ -1763,7 +1763,7 @@ libs=""
 uv_c_flags=""
 if ${cmake_system_mingw}; then
   uv_c_flags="${uv_c_flags} -DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0600"
-  libs="${libs} -lws2_32 -lpsapi -liphlpapi -lshell32 -luserenv -lole32 -loleaut32"
+  libs="${libs} -lws2_32 -lpsapi -liphlpapi -lshell32 -luserenv -lole32 -loleaut32 -luuid"
 else
   case "${cmake_system}" in
     *AIX*)