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cgitsb/filters/syntax-highlighting.py
Jeff Smith dbaee2672b ui-blame: Allow syntax highlighting
Place file contents into a single block so that syntax highlighting can
be applied in the usual fashion.  Place the alternating color bars
behind the file contents.  Force the default syntax highlighting
background to transparent.

Signed-off-by: Jeff Smith <whydoubt@gmail.com>
Reviewed-by: John Keeping <john@keeping.me.uk>
2018-01-19 11:40:58 +01:00

56 lines
1.7 KiB
Python
Executable File

#!/usr/bin/env python3
# This script uses Pygments and Python3. 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
import io
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
sys.stdin = io.TextIOWrapper(sys.stdin.buffer, encoding='utf-8', errors='replace')
sys.stdout = io.TextIOWrapper(sys.stdout.buffer, encoding='utf-8', errors='replace')
data = sys.stdin.read()
filename = sys.argv[1]
formatter = HtmlFormatter(style='pastie', nobackground=True)
try:
lexer = guess_lexer_for_filename(filename, data)
except ClassNotFound:
# check if there is any shebang
if data[0:2] == '#!':
lexer = guess_lexer(data)
else:
lexer = TextLexer()
except TypeError:
lexer = TextLexer()
# highlight! :-)
# printout pygments' css definitions as well
sys.stdout.write('<style>')
sys.stdout.write(formatter.get_style_defs('.highlight'))
sys.stdout.write('</style>')
sys.stdout.write(highlight(data, lexer, formatter, outfile=None))