cmake: Added custom target wrapper script

mesonbuild/cmake/data/run_ctgt.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+
+import argparse
+import subprocess
+import shutil
+import os
+import sys
+
+commands = [[]]
+SEPERATOR = ';;;'
+
+# Generate CMD parameters
+parser = argparse.ArgumentParser(description='Wrapper for add_custom_command')
+parser.add_argument('-d', '--directory', type=str, metavar='D', required=True, help='Working directory to cwd to')
+parser.add_argument('-o', '--outputs', nargs='+', metavar='O', required=True, help='Expected output files')
+parser.add_argument('-O', '--original-outputs', nargs='+', metavar='O', required=True, help='Output files expected by CMake')
+parser.add_argument('commands', nargs=argparse.REMAINDER, help='A "{}" seperated list of commands'.format(SEPERATOR))
+
+# Parse
+args = parser.parse_args()
+
+if len(args.outputs) != len(args.original_outputs):
+    print('Length of output list and original output list differ')
+    sys.exit(1)
+
+for i in args.commands:
+    if i == SEPERATOR:
+        commands += [[]]
+        continue
+
+    commands[-1] += [i]
+
+# Execute
+for i in commands:
+    # Skip empty lists
+    if not i:
+        continue
+
+    subprocess.run(i, cwd=args.directory)
+
+# Copy outputs
+zipped_outputs = zip(args.outputs, args.original_outputs)
+for expected, generated in zipped_outputs:
+    do_copy = False
+    if not os.path.exists(expected):
+        if not os.path.exists(generated):
+            print('Unable to find generated file. This can cause the build to fail:')
+            print(generated)
+            do_copy = False
+        else:
+            do_copy = True
+    elif os.path.exists(generated):
+        if os.path.getmtime(generated) > os.path.getmtime(expected):
+            do_copy = True
+
+    if do_copy:
+        if os.path.exists(expected):
+            os.remove(expected)
+        shutil.copyfile(generated, expected)

setup.py

@@ -36,7 +36,10 @@ packages = ['mesonbuild',
             'mesonbuild.modules',
             'mesonbuild.scripts',
             'mesonbuild.wrap']
-package_data = {'mesonbuild.dependencies': ['data/CMakeLists.txt', 'data/CMakeListsLLVM.txt', 'data/CMakePathInfo.txt']}
+package_data = {
+    'mesonbuild.dependencies': ['data/CMakeLists.txt', 'data/CMakeListsLLVM.txt', 'data/CMakePathInfo.txt'],
+    'mesonbuild.cmake': ['data/run_ctgt.py'],
+}
 data_files = []
 if sys.platform != 'win32':
     # Only useful on UNIX-like systems