Autogen: Use JSON instead of CMake script for info files

We used to store information for the _autogen target in a CMake script
file AutogenInfo.cmake, which was imported by a temporary cmake instance in
the _autogen target.  This introduced the overhead of creating a temporary
cmake instance and inherited the limitations of the CMake language which
only supports lists.

This patch introduces JSON files to pass information to AUTORCC and
autogen_ targets.  JSON files are more flexible for passing data, e.g. they
support nested lists.

The patch has the side effects that

- AutogenInfo.cmake is renamed to AutogenInfo.json
- AutogenOldSettings.txt is renamed to AutogenUsed.txt
- RCC<qrcBaseName><checksum>Info.cmake is renamed to
  AutoRcc_<qrcBaseName>_<checksum>_Info.json
- RCC<qrcBaseName><checksum>.lock is renamed to
  AutoRcc_<qrcBaseName>_<checksum>_Lock.lock
- RCC<qrcBaseName><checksum>Settings.txt is renamed to
  AutoRcc_<qrcBaseName>_<checksum>_Used.txt

1 files changed, 10 insertions, 1 deletions

diff --git a/Source/cmQtAutoGen.cxx b/Source/cmQtAutoGen.cxx
index 57c88259e1..0f0e86469d 100644
--- a/Source/cmQtAutoGen.cxx
+++ b/Source/cmQtAutoGen.cxx
@@ -72,7 +72,6 @@ void MergeOptions(std::vector<std::string>& baseOpts,
 // - Class definitions
 
 unsigned int const cmQtAutoGen::ParallelMax = 64;
-std::string const cmQtAutoGen::ListSep = "<<<S>>>";
 
 cm::string_view cmQtAutoGen::GeneratorName(GenT genType)
 {
@@ -162,6 +161,16 @@ std::string cmQtAutoGen::QuotedCommand(std::vector<std::string> const& command)
   return res;
 }
 
+std::string cmQtAutoGen::FileNameWithoutLastExtension(cm::string_view filename)
+{
+  auto slashPos = filename.rfind('/');
+  if (slashPos != cm::string_view::npos) {
+    filename.remove_prefix(slashPos + 1);
+  }
+  auto dotPos = filename.rfind('.');
+  return std::string(filename.substr(0, dotPos));
+}
+
 std::string cmQtAutoGen::ParentDir(cm::string_view filename)
 {
   auto slashPos = filename.rfind('/');