1 files changed, 44 insertions, 0 deletions
diff --git a/tools/meson-render-jinja2.py b/tools/meson-render-jinja2.py
new file mode 100755
index 0000000..3a3d912
--- /dev/null
+++ b/tools/meson-render-jinja2.py
@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# pylint: disable=consider-using-with
+
+import ast
+import os
+import re
+import sys
+
+import jinja2
+
+def parse_config_h(filename):
+    # Parse config.h file generated by meson.
+    ans = {}
+    for line in open(filename):
+        m = re.match(r'#define\s+(\w+)\s+(.*)', line)
+        if not m:
+            continue
+        a, b = m.groups()
+        if b and b[0] in '0123456789"':
+            b = ast.literal_eval(b)
+        ans[a] = b
+    return ans
+
+def render(filename, defines):
+    text = open(filename).read()
+    template = jinja2.Template(text,
+                               trim_blocks=True,
+                               lstrip_blocks=True,
+                               keep_trailing_newline=True,
+                               undefined=jinja2.StrictUndefined)
+    return template.render(defines)
+
+def main():
+    defines = parse_config_h(sys.argv[1])
+    defines.update(parse_config_h(sys.argv[2]))
+    output = render(sys.argv[3], defines)
+    with open(sys.argv[4], 'w') as f:
+        f.write(output)
+    info = os.stat(sys.argv[3])
+    os.chmod(sys.argv[4], info.st_mode)
+
+if __name__ == '__main__':
+    main()