gtk2/gtk/gentypefuncs.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
import re
import os
import filecmp

def replace_if_changed(new, old):
  '''
  Compare contents and only replace if changed to avoid triggering a rebuild.
  '''
  try:
    changed = not filecmp.cmp(new, old, shallow=False)
  except FileNotFoundError:
    changed = True
  if changed:
    os.replace(new, old)
  else:
    os.remove(new)

debug = os.getenv('GTK_GENTYPEFUNCS_DEBUG') is not None

out_file = sys.argv[1]
in_files = sys.argv[2:]

funcs = []


if debug: print ('Output file: ', out_file)

if debug: print (len(in_files), 'input files')

def open_file(filename, mode):
    if sys.version_info[0] < 3:
        return open(filename, mode=mode)
    else:
        return open(filename, mode=mode, encoding='utf-8')

for filename in in_files:
  if debug: print ('Input file: ', filename)
  with open_file(filename, "r") as f:
    for line in f:
      line = line.rstrip('\n').rstrip('\r')
      # print line
      match = re.search(r'\bg[tds]k_[a-zA-Z0-9_]*_get_type\b', line)
      if match:
        func = match.group(0)
        if not func in funcs:
          funcs.append(func)
          if debug: print ('Found ', func)

file_output = 'G_GNUC_BEGIN_IGNORE_DEPRECATIONS\n'

funcs = sorted(funcs)

for f in funcs:
  if f.startswith('gdk_x11') or f.startswith('gtk_socket') or f.startswith('gtk_plug'):
    file_output += '#ifdef GDK_WINDOWING_X11\n'
    file_output += '*tp++ = {0}();\n'.format(f)
    file_output += '#endif\n'
  else:
    file_output += '*tp++ = {0}();\n'.format(f)

if debug: print (len(funcs), 'functions')

tmp_file = out_file + '~'
with open(tmp_file, 'w') as f:
    f.write(file_output)
replace_if_changed(tmp_file, out_file)