cgitsb/filters/syntax-highlighting.py

#!/usr/bin/env python2

# This script uses Pygments and Python2. You must have both installed
# for this to work.
#
# http://pygments.org/
# http://python.org/
#
# It may be used with the source-filter or repo.source-filter settings
# in cgitrc.
#
# The following environment variables can be used to retrieve the
# configuration of the repository for which this script is called:
# CGIT_REPO_URL        ( = repo.url       setting )
# CGIT_REPO_NAME       ( = repo.name      setting )
# CGIT_REPO_PATH       ( = repo.path      setting )
# CGIT_REPO_OWNER      ( = repo.owner     setting )
# CGIT_REPO_DEFBRANCH  ( = repo.defbranch setting )
# CGIT_REPO_SECTION    ( = section        setting )
# CGIT_REPO_CLONE_URL  ( = repo.clone-url setting )


import sys
from pygments import highlight
from pygments.util import ClassNotFound
from pygments.lexers import TextLexer
from pygments.lexers import guess_lexer
from pygments.lexers import guess_lexer_for_filename
from pygments.formatters import HtmlFormatter


# read stdin and decode to utf-8. ignore any unkown signs.
data = sys.stdin.read().decode(encoding='utf-8', errors='ignore')
filename = sys.argv[1]
formatter = HtmlFormatter(encoding='utf-8', style='pastie')

try:
	lexer = guess_lexer_for_filename(filename, data, encoding='utf-8')
except ClassNotFound:
	# check if there is any shebang
	if data[0:2] == '#!':
		lexer = guess_lexer(data, encoding='utf-8')
	else:
		lexer = TextLexer(encoding='utf-8')
except TypeError:
	lexer = TextLexer(encoding='utf-8')

# highlight! :-)
# printout pygments' css definitions as well
sys.stdout.write('<style>')
sys.stdout.write(formatter.get_style_defs('.highlight'))
sys.stdout.write('</style>')
highlight(data, lexer, formatter, outfile=sys.stdout)