Meta: Add clean command to ladybird.py

Author: https://github.com/ayeteadoe
Commit: 56fd109252
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4742
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/R-Goc
Reviewed-by: https://github.com/trflynn89

Meta/ladybird.py

@@ -113,6 +113,8 @@ def main(platform):
     subparsers.add_parser('vcpkg', help='Ensure that dependencies are available',
                           parents=[preset_parser, compiler_parser])
 
+    subparsers.add_parser('clean', help='Cleans the build environment', parents=[preset_parser, compiler_parser])
+
     args = parser.parse_args()
     kwargs = vars(args)
     command = kwargs.pop('command', None)
@@ -162,6 +164,8 @@ def main(platform):
     elif command == 'vcpkg':
         _configure_build_env(**kwargs)
         _build_vcpkg()
+    elif command == 'clean':
+        _clean_main(**kwargs)
 
 
 def _configure_main(platform, **kwargs):
@@ -424,6 +428,14 @@ def _debug_main(host_system, build_dir, **kwargs):
         sys.exit(1)
 
 
+def _clean_main(**kwargs):
+    lb_source_dir, build_preset_dir, _ = _configure_build_env(**kwargs)
+    shutil.rmtree(str(build_preset_dir), ignore_errors=True)
+
+    user_vars_cmake_module = lb_source_dir.joinpath('Meta', 'CMake', 'vcpkg', 'user-variables.cmake')
+    user_vars_cmake_module.unlink(missing_ok=True)
+
+
 def _print_process_stderr(e, msg):
     err_details = f': {e.stderr}' if e.stderr else ''
     print(f'{msg}{err_details}', file=sys.stderr)