cmake: Add filtered debug-find options

Add a `--debug-find-pkg=` option to debug find calls for specific
packages.

Add a `--debug-find-var=` option to debug find calls for specific
return variables.

Fixes: #21880

1 files changed, 49 insertions, 2 deletions

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 9efdb54..2a3ef9b 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -968,7 +968,34 @@ void cmake::SetArgs(const std::vector<std::string>& args)
       "--debug-find", CommandArgument::Values::Zero,
       [](std::string const&, cmake* state) -> bool {
         std::cout << "Running with debug output on for the `find` commands.\n";
-        state->SetDebugFindOutputOn(true);
+        state->SetDebugFindOutput(true);
+        return true;
+      } },
+    CommandArgument{
+      "--debug-find-pkg", "Provide a package argument for --debug-find-pkg",
+      CommandArgument::Values::One, CommandArgument::RequiresSeparator::Yes,
+      [](std::string const& value, cmake* state) -> bool {
+        std::vector<std::string> find_pkgs(cmTokenize(value, ","));
+        std::cout << "Running with debug output on for the 'find' commands "
+                     "for package(s)";
+        for (auto const& v : find_pkgs) {
+          std::cout << " " << v;
+          state->SetDebugFindOutputPkgs(v);
+        }
+        std::cout << ".\n";
+        return true;
+      } },
+    CommandArgument{
+      "--debug-find-var", CommandArgument::Values::One,
+      CommandArgument::RequiresSeparator::Yes,
+      [](std::string const& value, cmake* state) -> bool {
+        std::vector<std::string> find_vars(cmTokenize(value, ","));
+        std::cout << "Running with debug output on for the variable(s)";
+        for (auto const& v : find_vars) {
+          std::cout << " " << v;
+          state->SetDebugFindOutputVars(v);
+        }
+        std::cout << ".\n";
         return true;
       } },
     CommandArgument{ "--trace-expand", CommandArgument::Values::Zero,
@@ -1325,7 +1352,7 @@ void cmake::SetArgs(const std::vector<std::string>& args)
       this->DebugTryCompileOn();
     }
     if (expandedPreset->DebugFind == true) {
-      this->SetDebugFindOutputOn(true);
+      this->SetDebugFindOutput(true);
     }
   }
 #endif
@@ -3619,6 +3646,26 @@ void cmake::SetDeprecatedWarningsAsErrors(bool b)
                       cmStateEnums::INTERNAL);
 }
 
+void cmake::SetDebugFindOutputPkgs(std::string const& args)
+{
+  this->DebugFindPkgs.emplace(args);
+}
+
+void cmake::SetDebugFindOutputVars(std::string const& args)
+{
+  this->DebugFindVars.emplace(args);
+}
+
+bool cmake::GetDebugFindOutput(std::string const& var) const
+{
+  return this->DebugFindVars.count(var);
+}
+
+bool cmake::GetDebugFindPkgOutput(std::string const& pkg) const
+{
+  return this->DebugFindPkgs.count(pkg);
+}
+
 #if !defined(CMAKE_BOOTSTRAP)
 cmMakefileProfilingData& cmake::GetProfilingOutput()
 {