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