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#!/usr/bin/env python
"""
CLI interface to markdown-it-py
Parse one or more markdown files, convert each to HTML, and print to stdout.
"""
from __future__ import annotations
import argparse
from collections.abc import Iterable, Sequence
import sys
from markdown_it import __version__
from markdown_it.main import MarkdownIt
version_str = "markdown-it-py [version {}]".format(__version__)
def main(args: Sequence[str] | None = None) -> int:
namespace = parse_args(args)
if namespace.filenames:
convert(namespace.filenames)
else:
interactive()
return 0
def convert(filenames: Iterable[str]) -> None:
for filename in filenames:
convert_file(filename)
def convert_file(filename: str) -> None:
"""
Parse a Markdown file and dump the output to stdout.
"""
try:
with open(filename, "r", encoding="utf8", errors="ignore") as fin:
rendered = MarkdownIt().render(fin.read())
print(rendered, end="")
except OSError:
sys.stderr.write(f'Cannot open file "{filename}".\n')
sys.exit(1)
def interactive() -> None:
"""
Parse user input, dump to stdout, rinse and repeat.
Python REPL style.
"""
print_heading()
contents = []
more = False
while True:
try:
prompt, more = ("... ", True) if more else (">>> ", True)
contents.append(input(prompt) + "\n")
except EOFError:
print("\n" + MarkdownIt().render("\n".join(contents)), end="")
more = False
contents = []
except KeyboardInterrupt:
print("\nExiting.")
break
def parse_args(args: Sequence[str] | None) -> argparse.Namespace:
"""Parse input CLI arguments."""
parser = argparse.ArgumentParser(
description="Parse one or more markdown files, "
"convert each to HTML, and print to stdout",
# NOTE: Remember to update README.md w/ the output of `markdown-it -h`
epilog=(
f"""
Interactive:
$ markdown-it
markdown-it-py [version {__version__}] (interactive)
Type Ctrl-D to complete input, or Ctrl-C to exit.
>>> # Example
... > markdown *input*
...
<h1>Example</h1>
<blockquote>
<p>markdown <em>input</em></p>
</blockquote>
Batch:
$ markdown-it README.md README.footer.md > index.html
"""
),
formatter_class=argparse.RawDescriptionHelpFormatter,
)
parser.add_argument("-v", "--version", action="version", version=version_str)
parser.add_argument(
"filenames", nargs="*", help="specify an optional list of files to convert"
)
return parser.parse_args(args)
def print_heading() -> None:
print("{} (interactive)".format(version_str))
print("Type Ctrl-D to complete input, or Ctrl-C to exit.")
if __name__ == "__main__":
exit_code = main(sys.argv[1:])
sys.exit(exit_code)