sh/ghmd

#!/usr/bin/env sh
# ghmd - format GitHub markdown
# via: https://leahneukirchen.org/dotfiles/.zshrc
# example: ghmd < README.md > README.html
# compat: +ash +bash +dash +hush -ksh +mksh +oksh +osh +posh +yash +zsh

ghmd() { ### @-
    ### convert a markdown file to HTML in the style of GitHub.
    ### note that this uses GitHub's API, so it requires internet connectivity.
    ###
    ### this script utilizes the CSS provided at
    ### [sindresorhus/github-markdown-css.](https://github.com/sindresorhus/github-markdown-css)
    ###
    ### ```
    ### ~/sh/ghmd < ~/rc/README.md > ~/rc/README.html
    ### ```
    printf '%s' '<!DOCTYPE html><html><head><meta charset="utf-8"><link ' \
      'href="https://eaguru.guru/t/github-markdown.css" media="all" ' \
      'rel="stylesheet" type="text/css"/><style type="text/css">' \
      '@media (prefers-color-scheme: dark) { body { background: black; } }' \
      '</style></head><body style="box-sizing: border-box; min-width: 200px; ' \
      'max-width: 980px; margin: 0 auto;"><article class="markdown-body" ' \
      'style="padding: 45px;">'
    curl -s --data-binary @- -H 'Content-Type: text/plain' \
      https://api.github.com/markdown/raw
    local ret=$?
    printf '%s' '</article></body></html>'
    return $ret
}

[ -n "${preload+-}" ] || ghmd "$@"