src/librarian/fonts.py

   1 import os
   2 from shutil import rmtree
   3 import subprocess
   4 from tempfile import mkdtemp
   5
   6
   7 def strip_font(path, chars, verbose=False):
   8     tmpdir = mkdtemp('-librarian-epub')
   9     try:
  10         cwd = os.getcwd()
  11     except OSError:
  12         cwd = None
  13
  14     os.chdir(os.path.join(os.path.dirname(os.path.realpath(__file__)),
  15                           'font-optimizer'))
  16     optimizer_call = [
  17         'perl', 'subset.pl', '--chars',
  18         ''.join(chars).encode('utf-8'),
  19         path,
  20         os.path.join(tmpdir, 'font.ttf')
  21     ]
  22     env = {"PERL_USE_UNSAFE_INC": "1"}
  23     if verbose:
  24         print("Running font-optimizer")
  25         subprocess.check_call(optimizer_call, env=env)
  26     else:
  27         dev_null = open(os.devnull, 'w')
  28         subprocess.check_call(optimizer_call, stdout=dev_null,
  29                               stderr=dev_null, env=env)
  30     with open(os.path.join(tmpdir, 'font.ttf'), 'rb') as f:
  31         content = f.read()
  32
  33     rmtree(tmpdir)
  34
  35     if cwd is not None:
  36         os.chdir(cwd)
  37
  38     return content