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md2pdf.py
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md2pdf.py
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import os
import time
import click
import markdown
from markdown_include.include import MarkdownInclude
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
from weasyprint import HTML
EXISTING_FILE = click.Path(exists=True, dir_okay=False, resolve_path=True)
def _html(markdown_file_name, css_file_name):
with open(markdown_file_name, mode="r", encoding="utf-8") as markdown_file:
with open(css_file_name, mode="r", encoding="utf-8") as css_file:
markdown_input = markdown_file.read()
css_input = css_file.read()
markdown_path = os.path.dirname(markdown_file_name)
markdown_include = MarkdownInclude(configs={"base_path": markdown_path})
html = markdown.markdown(
markdown_input, extensions=["extra", markdown_include, "meta", "tables"]
)
return f"""
<html>
<head>
<style>{css_input}</style>
</head>
<body>{html}</body>
</html>
"""
def _convert(markdown_file_name, css_file_name):
file_name = os.path.splitext(markdown_file_name)[0]
html_string = _html(markdown_file_name, css_file_name)
with open(
file_name + ".html", "w", encoding="utf-8", errors="xmlcharrefreplace"
) as output_file:
output_file.write(html_string)
markdown_path = os.path.dirname(markdown_file_name)
html = HTML(string=html_string, base_url=markdown_path)
html.write_pdf(file_name + ".pdf")
class EventHandler(FileSystemEventHandler):
def __init__(self, markdown_file_name, css_file_name):
self.markdown_file_name = markdown_file_name
self.css_file_name = css_file_name
def on_modified(self, event):
if event.src_path in [self.markdown_file_name, self.css_file_name]:
click.echo(f"{event.src_path} has changed")
_convert(self.markdown_file_name, self.css_file_name)
@click.group()
def cli():
pass
@cli.command()
@click.argument("md", type=EXISTING_FILE)
@click.argument("css", type=EXISTING_FILE)
def watch(md, css):
(
"Watches Markdown file MD and stylesheet CSS for changes, "
"and converts them to HTML and PDF documents when they are modified."
)
click.echo(f"Watching {md} and {css} for changes. Press CTRL+C to quit.")
_convert(md, css)
markdown_path = os.path.dirname(md)
css_path = os.path.dirname(css)
event_handler = EventHandler(md, css)
observer = Observer()
observer.schedule(event_handler, markdown_path)
if markdown_path != css_path:
observer.schedule(event_handler, css_path)
observer.start()
try:
while True:
time.sleep(1)
except KeyboardInterrupt:
observer.stop()
observer.join()
@cli.command()
@click.argument("md", type=EXISTING_FILE)
@click.argument("css", type=EXISTING_FILE)
def convert(md, css):
"""Converts Markdown file MD and stylesheet CSS to HTML and PDF documents."""
_convert(md, css)
if __name__ == "__main__":
cli()