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, 3 insertions, 2 deletions

diff --git a/Source/cmQtAutoGen.h b/Source/cmQtAutoGen.h
index c8e4203..d070b79 100644
--- a/Source/cmQtAutoGen.h
+++ b/Source/cmQtAutoGen.h
@@ -62,8 +62,6 @@ public:
     RCC  // AUTORCC
   };
 
-  /// @brief Nested lists separator
-  static std::string const ListSep;
   /// @brief Maximum number of parallel threads/processes in a generator
   static unsigned int const ParallelMax;
 
@@ -81,6 +79,9 @@ public:
 
   static std::string QuotedCommand(std::vector<std::string> const& command);
 
+  /// @brief Returns the file name without path and extension (thread safe)
+  static std::string FileNameWithoutLastExtension(cm::string_view filename);
+
   /// @brief Returns the parent directory of the file (thread safe)
   static std::string ParentDir(cm::string_view filename);