old_contents: #!/usr/bin/env python3
  
  # Ancillary wrapper around glib-compile-resources that sets up a
  # modified environment in order to use the tools that we just
  # built instead of the system ones
  
  import argparse
  import os
  
  argparser = argparse.ArgumentParser(description='Compile resources')
  argparser.add_argument('--pixdata', metavar='PATH', help='Path to gdk-pixbuf-pixdata')
  argparser.add_argument('--loaders', metavar='PATH', help='Path to the loaders.cache file')
  argparser.add_argument('--sourcedir', metavar='PATH', help='Path to the source directory')
  argparser.add_argument('resource', help='GResource XML file')
  argparser.add_argument('output', help='Output file')
  
  group = argparser.add_mutually_exclusive_group()
  group.add_argument('--header', help='Generate header file', action='store_true')
  group.add_argument('--source', help='Generate source file', action='store_true')
  
  args = argparser.parse_args()
  
  cmd = ['glib-compile-resources']
  if args.header:
      cmd += ['--generate-header']
  else:
      cmd += ['--generate-source']
  
  cmd += ['--sourcedir', args.sourcedir]
  cmd += [args.resource]
  cmd += ['--target', args.output]
  
  newenv = os.environ.copy()
  newenv['GDK_PIXBUF_PIXDATA'] = args.pixdata
  newenv['GDK_PIXBUF_MODULE_FILE'] = args.loaders
  
  os.execvpe(cmd[0], cmd, newenv)
  
new_contents: #!/usr/bin/env python3
  
  # Ancillary wrapper around glib-compile-resources that sets up a
  # modified environment in order to use the tools that we just
  # built instead of the system ones
  
  import argparse
  import os
  
  argparser = argparse.ArgumentParser(description='Compile resources')
  argparser.add_argument('--glib-compile-resources', metavar='PATH', help='Path to glib-compile-resources')
  argparser.add_argument('--pixdata', metavar='PATH', help='Path to gdk-pixbuf-pixdata')
  argparser.add_argument('--loaders', metavar='PATH', help='Path to the loaders.cache file')
  argparser.add_argument('--sourcedir', metavar='PATH', help='Path to the source directory')
  argparser.add_argument('resource', help='GResource XML file')
  argparser.add_argument('output', help='Output file')
  
  group = argparser.add_mutually_exclusive_group()
  group.add_argument('--header', help='Generate header file', action='store_true')
  group.add_argument('--source', help='Generate source file', action='store_true')
  
  args = argparser.parse_args()
  
  cmd = []
  
  if args.glib_compile_resources:
      cmd += [args.glib_compile_resources]
  else:
      cmd += ['glib-compile-resources']
  
  if args.header:
      cmd += ['--generate-header']
  else:
      cmd += ['--generate-source']
  
  cmd += ['--sourcedir', args.sourcedir]
  cmd += [args.resource]
  cmd += ['--target', args.output]
  
  newenv = os.environ.copy()
  newenv['GDK_PIXBUF_PIXDATA'] = args.pixdata
  newenv['GDK_PIXBUF_MODULE_FILE'] = args.loaders
  
  os.execvpe(cmd[0], cmd, newenv)
  
subject: Deal with glib-compile-resources not in the PATH