From 98813c1d22244430f95c386890b81abd3c915ccf Mon Sep 17 00:00:00 2001
From: Daniel Mensinger <daniel@mensinger-ka.de>
Date: Fri, 28 Jun 2019 13:13:57 +0200
Subject: cmake: Added custom target wrapper script

---
 mesonbuild/cmake/data/run_ctgt.py | 59 +++++++++++++++++++++++++++++++++++++++
 setup.py                          |  5 +++-
 2 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100755 mesonbuild/cmake/data/run_ctgt.py

diff --git a/mesonbuild/cmake/data/run_ctgt.py b/mesonbuild/cmake/data/run_ctgt.py
new file mode 100755
index 000000000..0a9b80df8
--- /dev/null
+++ b/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)
diff --git a/setup.py b/setup.py
index 7a7edef70..0a2efb190 100644
--- a/setup.py
+++ b/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
-- 
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