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jenux/diff2html.sh

Created July 25, 2019 02:26
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  1. jenux created this gist Jul 25, 2019.
    116 changes: 116 additions & 0 deletions diff2html.sh
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,116 @@
    #!/bin/bash
    #
    # Convert diff output to colorized HTML.
    # (C) Mitch Frazier, 2008-08-27
    # http://www.linuxjournal.com/content/convert-diff-output-colorized-html
    # Modified by stopyoukid
    #

    html="<html><head><meta charset=\"utf-8\"><title>Pretty Diff</title><style>body {text-align: center;}#wrapper {display: inline-block;margin-top: 1em;min-width: 800px;text-align: left;}h2 {background: #fafafa;background: -moz-linear-gradient(#fafafa, #eaeaea);background: -webkit-linear-gradient(#fafafa, #eaeaea);-ms-filter: \"progid:DXImageTransform.Microsoft.gradient(startColorstr='#fafafa',endColorstr='#eaeaea')\";border: 1px solid #d8d8d8;border-bottom: 0;color: #555;font: 14px sans-serif;overflow: hidden;padding: 10px 6px;text-shadow: 0 1px 0 white;margin: 0;}.file-diff {border: 1px solid #d8d8d8;margin-bottom: 1em;overflow: auto;padding: 0.5em 0;}.file-diff > div {width: 100%:}pre {margin: 0;font-family: \"Bitstream Vera Sans Mono\", Courier, monospace;font-size: 12px;line-height: 1.4em;text-indent: 0.5em;}.file {color: #aaa;}.delete {background-color: #fdd;}.insert {background-color: #dfd;}.info {color: #a0b;}</style></head><body><div id=\"wrapper\">"
    first=1
    diffseen=0
    lastonly=0
    currSection=''
    currFile=''

    function addDiffToPage {
    html+="<h2>"$1"</h2>"
    html+="<div class=\"file-diff\">"
    html+=$2
    html+="</div>"
    }

    OIFS=$IFS
    IFS='
    '

    # The -r option keeps the backslash from being an escape char.
    read -r s

    while [[ $? -eq 0 ]]; do
    # Get beginning of line to determine what type of diff line it is.
    t1=${s:0:1}
    t2=${s:0:2}
    t3=${s:0:3}
    t4=${s:0:4}
    t7=${s:0:7}

    # Determine HTML class to use.
    if [[ "$t7" == 'Only in' ]]; then
    cls='only'

    if [[ $diffseen -eq 0 ]]; then
    diffseen=1
    else
    if [[ $lastonly -eq 0 ]]; then
    addDiffToPage $currFile $currSection
    fi
    fi

    if [[ $lastonly -eq 0 ]]; then
    currSection=""
    fi
    lastonly=1

    elif [[ "$t4" == 'diff' ]]; then
    cls='file'
    if [[ $diffseen -eq 1 ]]; then
    addDiffToPage $currFile $currSection
    fi

    diffseen=1
    currSection=""
    lastonly=0

    elif [[ "$t3" == '+++' ]]; then
    # --- always comes before +++
    # currFile=${s#+++ */}
    cls='insert'
    lastonly=0

    elif [[ "$t3" == '---' ]]; then
    currFile=${s#--- */}
    cls='delete'
    lastonly=0

    elif [[ "$t2" == '@@' ]]; then
    cls='info'
    lastonly=0

    elif [[ "$t1" == '+' ]]; then
    cls='insert'
    lastonly=0

    elif [[ "$t1" == '-' ]]; then
    cls='delete'
    lastonly=0

    else
    cls='context'
    lastonly=0
    fi

    # Convert &, <, > to HTML entities.
    s=$(sed -e 's/\&/\&amp;/g' -e 's/</\&lt;/g' -e 's/>/\&gt;/g' <<<"$s")
    if [[ $first -eq 1 ]]; then
    first=0
    fi

    # Output the line.
    if [[ "$cls" ]]; then
    currSection+='<pre class="'${cls}'">'${s}'</pre>'
    else
    currSection+='<pre>'${s}'</pre>'
    fi

    read -r s
    done

    #if [[ $diffseen -eq 1 && $onlyseen -eq 0 ]]; then
    if [[ "$currSection" ]]; then
    addDiffToPage $currFile $currSection
    fi
    html+="</div></body></html>"
    echo "$html"

    IFS=$OIFS