find_*: Use debug logging infrastructure

Teach the find_package, find_library, find_program, find_path, and
find_file commands to print debug log messages when enabled by the
`--debug-find` command-line option or `CMAKE_FIND_DEBUG_MODE` variable.

1 files changed, 14 insertions, 5 deletions

diff --git a/Source/cmFindProgramCommand.cxx b/Source/cmFindProgramCommand.cxx
index e0a3fbf..3e49172 100644
--- a/Source/cmFindProgramCommand.cxx
+++ b/Source/cmFindProgramCommand.cxx
@@ -15,7 +15,9 @@ class cmExecutionStatus;
 
 struct cmFindProgramHelper
 {
-  cmFindProgramHelper()
+  cmFindProgramHelper(cmMakefile* makefile, cmFindBase const* base)
+    : DebugSearches("find_program", base)
+    , Makefile(makefile)
   {
 #if defined(_WIN32) || defined(__CYGWIN__) || defined(__MINGW32__)
     // Consider platform-specific extensions.
@@ -41,6 +43,10 @@ struct cmFindProgramHelper
   // Current full path under consideration.
   std::string TestPath;
 
+  // Debug state
+  cmFindBaseDebugState DebugSearches;
+  cmMakefile* Makefile;
+
   void AddName(std::string const& name) { this->Names.push_back(name); }
   void SetName(std::string const& name)
   {
@@ -78,8 +84,10 @@ struct cmFindProgramHelper
       this->TestNameExt = cmStrCat(name, ext);
       this->TestPath =
         cmSystemTools::CollapseFullPath(this->TestNameExt, path);
-
-      if (cmSystemTools::FileExists(this->TestPath, true)) {
+      bool exists = cmSystemTools::FileExists(this->TestPath, true);
+      exists ? this->DebugSearches.FoundAt(this->TestPath)
+             : this->DebugSearches.FailedAt(this->TestPath);
+      if (exists) {
         this->BestPath = this->TestPath;
         return true;
       }
@@ -97,6 +105,7 @@ cmFindProgramCommand::cmFindProgramCommand(cmExecutionStatus& status)
 // cmFindProgramCommand
 bool cmFindProgramCommand::InitialPass(std::vector<std::string> const& argsIn)
 {
+  this->DebugMode = ComputeIfDebugModeWanted();
   this->VariableDocumentation = "Path to a program.";
   this->CMakePathName = "PROGRAM";
   // call cmFindBase::ParseArguments
@@ -158,7 +167,7 @@ std::string cmFindProgramCommand::FindNormalProgram()
 std::string cmFindProgramCommand::FindNormalProgramNamesPerDir()
 {
   // Search for all names in each directory.
-  cmFindProgramHelper helper;
+  cmFindProgramHelper helper(this->Makefile, this);
   for (std::string const& n : this->Names) {
     helper.AddName(n);
   }
@@ -181,7 +190,7 @@ std::string cmFindProgramCommand::FindNormalProgramNamesPerDir()
 std::string cmFindProgramCommand::FindNormalProgramDirsPerName()
 {
   // Search the entire path for each name.
-  cmFindProgramHelper helper;
+  cmFindProgramHelper helper(this->Makefile, this);
   for (std::string const& n : this->Names) {
     // Switch to searching for this name.
     helper.SetName(n);