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markdown_code_blocks.py
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markdown_code_blocks.py
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import argparse
from typing import Optional
from typing import Sequence
from typing import Type
import mistune
import pygments.formatters
import pygments.lexers
import pygments.util
class CodeRenderer(mistune.HTMLRenderer):
def block_code(self, code: str, info: Optional[str] = None) -> str:
try:
lexer = pygments.lexers.get_lexer_by_name(info, stripnl=False)
cssclass = f'highlight {info}'
except pygments.util.ClassNotFound:
lexer = pygments.lexers.get_lexer_by_name('text', stripnl=False)
cssclass = 'highlight'
formatter = pygments.formatters.HtmlFormatter(cssclass=cssclass)
return pygments.highlight(code, lexer=lexer, formatter=formatter)
def highlight(
doc: str,
Renderer: Type[mistune.HTMLRenderer] = CodeRenderer,
) -> str:
return mistune.Markdown(Renderer())(doc)
def main(argv: Optional[Sequence[str]] = None) -> int:
parser = argparse.ArgumentParser()
parser.add_argument('filename', default='/dev/stdin')
args = parser.parse_args(argv)
with open(args.filename) as f:
hl = highlight(f.read())
print(f'<!doctype html><html><body>{hl}</body></html>')
return 0
if __name__ == '__main__':
exit(main())