tools/meson-render-jinja2.py

   1 #!/usr/bin/env python3
   2 # SPDX-License-Identifier: LGPL-2.1-or-later
   3 # pylint: disable=consider-using-with
   4
   5 import ast
   6 import os
   7 import re
   8 import sys
   9
  10 import jinja2
  11
  12 def parse_config_h(filename):
  13     # Parse config.h file generated by meson.
  14     ans = {}
  15     for line in open(filename):
  16         m = re.match(r'#define\s+(\w+)\s+(.*)', line)
  17         if not m:
  18             continue
  19         a, b = m.groups()
  20         if b and b[0] in '0123456789"':
  21             b = ast.literal_eval(b)
  22         ans[a] = b
  23     return ans
  24
  25 def render(filename, defines):
  26     text = open(filename).read()
  27     template = jinja2.Template(text,
  28                                trim_blocks=True,
  29                                lstrip_blocks=True,
  30                                keep_trailing_newline=True,
  31                                undefined=jinja2.StrictUndefined)
  32     return template.render(defines)
  33
  34 def main():
  35     defines = parse_config_h(sys.argv[1])
  36     output = render(sys.argv[2], defines)
  37     with open(sys.argv[3], 'w') as f:
  38         f.write(output)
  39     info = os.stat(sys.argv[2])
  40     os.chmod(sys.argv[3], info.st_mode)
  41
  42 if __name__ == '__main__':
  43     main()