netvor
/
minions


			
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							#!/bin/bash

#shellcheck disable=SC1090
. "$(sfpath)" || exit 3

shellfu import pretty

usage() {
    mkusage "$@" "[options] FILE"                                   \
        -- \
            "Open Markdown file FILE in vimb (no junk)."            \
        -o \
            "-C DIR   Use DIR as config directory root. Default is" \
            "       \$HOME/.config/mdvimb."                         \
            "-S STYLE   Add CSS style STYLE to the final HTML (this"\
            "       implies -w).  If STYLE contains slash, it will" \
            "       be interpreted as path, otherwise a file called"\
            "       STYLE.css is looked up in 'css' directory of"   \
            "       configuration directory.  Default is to not add"\
            "       style."                                         \
            "-c CONV_BIN    Use converter CONV_BIN, which must be"  \
            "       a program that when called without arguments,"  \
            "       accepts Markdown on standard input and prints"  \
            "       HTML to standard output. Default is 'Markdown'."\
            "-d     Enable debugging output."                       \
            "-n     Don't open, just print HTML."                   \
            "-w     Wrap the generated HTML with basic HTML5 tags"  \
            "       such as <DOCTYPE>, <html/>, <head/> and"        \
            "       <body/>.  Default is to leave the HTML as is."  \
            "-v     Enable verbose output."                         \
            "--help   Print this help text and exit."               \
        -- \
            "Default values of options -C, -S and -c can be changed"\
            "by setting environment variables MDVIMB__CONFIG_HOME," \
            "MDVIMB__STYLE and MDVIMB__CONVERTER, respectively."
}

MDVIMB__CONVERTER=${MDVIMB__CONVERTER:-Markdown}

MDVIMB__CONFIG_HOME=${MDVIMB__CONFIG_HOME:-$HOME/.config/mdvimb}

MDVIMB__STYLE=${MDVIMB__STYLE:-}

browseopen() {
    #
    # Open stdin in vimb
    #
    $NoOpen && { cat; return 0; }
    think "opening vimb"
    vimb - "$@"
}

mkwrap() {
    #
    # Create wrapper part $1 if needed
    #
    local part=$1
    case $part in
        link)
            mkcssref >/dev/null || return 0
            think "adding CSS style: $Style"
            echo '        <style type="text/css" media="screen">'
            cat "$(mkcssref)"
            echo '        </style>'
            ;;
        title)
            case $MdFile in
                "") echo '        <title>mdvimb:(stdin)</title>'    ;;
                *)  echo "        <title>mdvimb:$MdFile</title>"    ;;
            esac
            ;;
        head)
            echo '<!DOCTYPE html>'
            echo '<html>'
            echo '    <head>'
            mkwrap title
            mkwrap link
            echo '    </head>'
            echo '    <body>'
            ;;
        tail)
            echo '    </body>'
            echo '</html>'
            ;;
    esac
}

may_wrap() {
    #
    # Take HTML on stdin; wrap if $Wrap
    #
    $Wrap || { cat; return 0; }
    think "adding HTML5 tags"
    mkwrap head
    cat
    mkwrap tail
}

mkcssref() {
    #
    # Print CSS reference
    #
    local cssfile=""
    case $Style in
        "")     return 0                      ;;
        */*)    cssfile=$Style                ;;
        *)      cssfile="$ConfigHome/css/$Style.css" ;;
    esac
    test -f "$cssfile" || {
        warn "CSS file not found, ignoring: $cssfile"
        return 3
    }
    debug -v cssfile
    echo "$cssfile"
}


main() {
    local MdFile
    local converter=$MDVIMB__CONVERTER
    local ConfigHome=$MDVIMB__CONFIG_HOME
    local converterpath
    local NoOpen=false
    local Wrap=false
    local Style=$MDVIMB__STYLE
    #shellcheck disable=SC2034
    while true; do case $1 in
        -C) ConfigHome=$2;       shift 2 ;;
        -S) Style=$2;            shift 2 ;;
        -c) converter=$2;        shift 2 ;;
        -d) PRETTY_DEBUG=true;   shift ;;
        -n) NoOpen=true;         shift ;;
        -v) PRETTY_VERBOSE=true; shift ;;
        -w) Wrap=true;           shift ;;
        --help) usage -k               ;;
        -*) usage -w "unknown argument: $1" ;;
        *)  break ;;
    esac done
    test -n "$Style" && Wrap=true
    MdFile=$1; shift
    debug -v MDVIMB__CONVERTER MDVIMB__CONFIG_HOME MDVIMB__STYLE
    debug -v MdFile converter NoOpen Wrap Style ConfigHome
    converterpath=$(command -v "$converter") \
     || die "converter not available: $converter"
    debug -v converterpath
    think "using converter: $converter"
    case $MdFile in
        -|"")  think "reading standard input" ;;
        *)     think "reading file: $MdFile"  ;;
    esac
    case $MdFile in
        "")            $converterpath | may_wrap | browseopen "$@" ;;
        -)             $converterpath | may_wrap | browseopen "$@" ;;
        *)  <"$MdFile" $converterpath | may_wrap | browseopen "$@"
    esac
}

main "$@"