old_contents: #!/usr/bin/env python3
  
  # Ancillary wrapper around gdk-pixbuf-print-mime-types 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
  import subprocess
  import sys
  
  argparser = argparse.ArgumentParser(description='Compile resources')
  argparser.add_argument('--printer', metavar='PATH', help='Path to gdk-pixbuf-print-mime-types')
  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('--bindir', metavar='PATH', help='Path to the source directory')
  argparser.add_argument('input', help='Template file')
  argparser.add_argument('output', help='Output file')
  
  args = argparser.parse_args()
  
  newenv = os.environ.copy()
  newenv['GDK_PIXBUF_PIXDATA'] = args.pixdata
  newenv['GDK_PIXBUF_MODULE_FILE'] = args.loaders
  
  cmd = args.printer
  
  mimetypes_out = subprocess.Popen(cmd, env=newenv, stdout=subprocess.PIPE).communicate()[0]
  if not mimetypes_out:
      sys.exit(1)
  
  infile = open(args.input, 'r')
  outfile = open(args.output, 'w')
  
  for line in infile:
      line = line.replace('@bindir@', args.bindir)
      line = line.replace('@mimetypes@', mimetypes_out.decode('ascii'))
      outfile.write(line)
  
  infile.close()
  outfile.close()
  
  sys.exit(0)
  
new_contents: #!/usr/bin/env python3
  
  # Ancillary wrapper around gdk-pixbuf-print-mime-types 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
  import subprocess
  import sys
  
  argparser = argparse.ArgumentParser(description='Compile resources')
  argparser.add_argument('--printer', metavar='PATH', help='Path to gdk-pixbuf-print-mime-types')
  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('--bindir', metavar='PATH', help='Path to the source directory')
  argparser.add_argument('input', help='Template file')
  argparser.add_argument('output', help='Output file')
  
  args = argparser.parse_args()
  
  newenv = os.environ.copy()
  newenv['GDK_PIXBUF_PIXDATA'] = args.pixdata
  newenv['GDK_PIXBUF_MODULE_FILE'] = args.loaders
  # 'nt': NT-based Windows, see https://docs.python.org/3/library/os.html
  if os.name == 'nt':
      gdk_pixbuf_dll_buildpath = os.path.dirname(args.pixdata)
      newenv['PATH'] = gdk_pixbuf_dll_buildpath + os.pathsep + newenv['PATH']
  
  cmd = args.printer
  
  mimetypes_out = subprocess.Popen(cmd, env=newenv, stdout=subprocess.PIPE).communicate()[0]
  if not mimetypes_out:
      sys.exit(1)
  
  infile = open(args.input, 'r')
  outfile = open(args.output, 'w')
  
  for line in infile:
      line = line.replace('@bindir@', args.bindir)
      line = line.replace('@mimetypes@', mimetypes_out.decode('ascii'))
      outfile.write(line)
  
  infile.close()
  outfile.close()
  
  sys.exit(0)
  
subject: Fix running gen-thumbnailer.py on Windows