filters/syntax-highlighting.py

   1 #!/usr/bin/env python3
   2
   3 # This script uses Pygments and Python3. You must have both installed
   4 # for this to work.
   5 #
   6 # http://pygments.org/
   7 # http://python.org/
   8 #
   9 # It may be used with the source-filter or repo.source-filter settings
  10 # in cgitrc.
  11 #
  12 # The following environment variables can be used to retrieve the
  13 # configuration of the repository for which this script is called:
  14 # CGIT_REPO_URL        ( = repo.url       setting )
  15 # CGIT_REPO_NAME       ( = repo.name      setting )
  16 # CGIT_REPO_PATH       ( = repo.path      setting )
  17 # CGIT_REPO_OWNER      ( = repo.owner     setting )
  18 # CGIT_REPO_DEFBRANCH  ( = repo.defbranch setting )
  19 # CGIT_REPO_SECTION    ( = section        setting )
  20 # CGIT_REPO_CLONE_URL  ( = repo.clone-url setting )
  21
  22
  23 import sys
  24 import io
  25 from pygments import highlight
  26 from pygments.util import ClassNotFound
  27 from pygments.lexers import TextLexer
  28 from pygments.lexers import guess_lexer
  29 from pygments.lexers import guess_lexer_for_filename
  30 from pygments.formatters import HtmlFormatter
  31
  32
  33 sys.stdin = io.TextIOWrapper(sys.stdin.buffer, encoding='utf-8', errors='replace')
  34 sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8', errors='replace')
  35 data = sys.stdin.read()
  36 filename = sys.argv[1]
  37 formatter = HtmlFormatter(style='pastie', nobackground=True)
  38
  39 try:
  40         lexer = guess_lexer_for_filename(filename, data)
  41 except ClassNotFound:
  42         # check if there is any shebang
  43         if data[0:2] == '#!':
  44                 lexer = guess_lexer(data)
  45         else:
  46                 lexer = TextLexer()
  47 except TypeError:
  48         lexer = TextLexer()
  49
  50 # highlight! :-)
  51 # printout pygments' css definitions as well
  52 sys.stdout.write('<style>')
  53 sys.stdout.write(formatter.get_style_defs('.highlight'))
  54 sys.stdout.write('</style>')
  55 sys.stdout.write(highlight(data, lexer, formatter, outfile=None))