diff options
Diffstat (limited to 'md.sh')
| -rwxr-xr-x | md.sh | 176 |
1 files changed, 176 insertions, 0 deletions
@@ -0,0 +1,176 @@ +#!/bin/sh +set -e + +# usage: +# ./md.sh <target dir> +# ./md.sh <input md> <output html> +# +# target dir: input `src.md`, output `index.html` +# dependencies: lowdown, fzf, python (for now) + + +# i/o variables + +IN="$1/src.md" +OUT="$1/index.html" + +if [ "$2" ] ; then + IN="$1" ; + OUT="$2" ; +fi + +# confirm source exists before continuing + +[ -f $IN ] || { echo "---- [FATAL] $IN not found ----" ; exit 1 ; } + + +### initial write + +cat md-header > $OUT +lowdown -Thtml $IN >> $OUT +cat md-footer >> $OUT +echo '[ok] initial assembly' + + +### useful functions + +sedesc() { + sed -e 's;&;\\\&;g' -e 's/;/\\\;/g' +} + +unesc() { + sed -e 's;\\\&;\&;g' -e 's/\\\;/;/g' +} + +encode() ( # TODO: python't + python -c "import urllib, sys; print urllib.quote(sys.argv[1])" "$1" +) + +decode() { + /bin/printf '%b' "$(echo "$1" | sed 's;%;\\x;g')" +} + + +### header variables extracted from metadata section + +TITLE=$(grep -e '^title: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc) +sed "s/<title>#/<title>${TITLE}/1" -i'' $OUT +printf '[ok] title: %s\n' "$(echo $TITLE | unesc)" + +BOMBER=$(grep -e '^bomber: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc) +sed "s/<div class=\"bomber\">#/<div class=\"bomber\">${BOMBER}/1" -i'' $OUT +printf '[ok] bomber: %s\n' "$(echo $BOMBER | unesc)" + +MDATE=$(stat -c '%y' $IN | sed -e 's/\.[0-9]* //' -e 's/\(..\)\(..\)$/\1:\2/') # format: "yyyy-mm-dd hh:mm:ss±zz:zz" (ISO 8601) +DATE=$(echo $MDATE | cut -f 1 -d ' ' | sed -e 's/-//g' -e 's/^..//') # format: "yymmdd" (for humans) +sed "s;<div class=\"ident\"><time>#;<div class=\"ident\"><time datetime=\"${MDATE}\">${DATE};1" -i'' $OUT +sed "/^<\/head>/i <meta http-equiv=\"last-modified\" content=\"${MDATE}\" />" -i'' $OUT +printf '[ok] date: %s (%s)\n' "$DATE" "$MDATE" + +LEADING=$(grep -e '^leading: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc) +sed "s;<div class=\"leading\">#;<div class=\"leading\">${LEADING};1" -i'' $OUT +printf '[ok] leading: "%s"\n' "$(echo $LEADING | unesc)" + +METADESC="\«\;${BOMBER}\»\; \&mdash\; ${LEADING}" +sed "s;<meta name=\"description\" content=\"#;<meta name=\"description\" content=\"${METADESC};1" -i'' $OUT +printf '[ok] meta description\n' + + +### image handling + +grep -n '<p><img' $OUT | \ +while IFS='' read -r data ; do + LINE=$(echo $data | cut -f 1 -d :) ; # extract line number + FILE=$(echo $data | cut -f 2 -d \") ; # extract file path + CAPT=$(echo $data | cut -f 4 -d \") ; # extract image caption + + if [ "$CAPT" = "#tex" ] ; then # for tex figures: remove caption and containers + sed "${LINE}s;.*;<figure><img src=\"${FILE}\" alt=\"\"></figure>;" -i'' $OUT ; + printf '[ok] tex figure at line %s\n' "$LINE" ; + else # use new image format + sed "${LINE}s;.*;<figure><a href=\"${FILE}\"><img src=\"${FILE}\" alt=\"\"></a><figcaption><p>${CAPT}</p></figcaption></figure>;" -i'' $OUT ; + printf '[ok] image at line %s\n' "$LINE" ; + fi +done + + +### table of contents generation + +tocgen() ( + +tmp=$(mktemp -p /tmp) # using a tempfile, more convenient for storage and operations + +TOCLIST=$(grep -e '^#' $IN | sed -e 's; ;- ;' -e 's;^#;;' -e 's;#; ;g') # headers from source as md list + +echo "$TOCLIST" | while IFS='' read -r data ; do # encode headers as urls + HEADER=$(echo "$data" | sed 's/^[[:space:]-]*//' | encode "$(cat /dev/stdin)") ; + echo "$data" | sed "s/^\([[:space:]-]*\)\(.*\)$/\1${HEADER}/" >> $tmp ; +done + +buffer=$(cat $tmp) ; echo "$buffer" | lowdown -Thtml > $tmp # convert to html, write to tempfile (reset) + +sed -e '1i <nav class="toc">' -e '/^$/d' -i'' $tmp # prepend starting tag, remove empty lines + +cat $tmp | while IFS='' read -r data ; do + + # get header (both encoded and raw), write as link + ID=$(echo $data | sed "s;^<li>\([^</>]*\)\(</li>\)*$;\1;") ; + HEADER=$(decode "$ID" | sedesc) ; + sed -e "s;^<li>\(${ID}\);<li><a href=\"#\1\">${HEADER};" -e "s;\([[:alnum:]]\)</li>$;\1</a></li>;" -i'' $tmp ; + + # find old id in output, replace with new id + IDLINE=$(grep -ne "^<h[[:digit:]] id=" $OUT | fzf -f "$(echo $HEADER | unesc)" | head -n 1 | cut -f 1 -d :) ; + if [ "$IDLINE" ] ; then + sed -e "${IDLINE}s;id=\".*\">.*</h;id=\"${ID}\">${HEADER}</h;" -i'' $OUT ; + printf ' assembled header "%s"\n' "$(echo $HEADER | unesc)" ; + # else + # printf '[warning] could not match header id: "%s"\n' "$HEADER" ; + # echo "---- [FATAL] could not find header id (possible escapement issue) ----" ; + # rm $tmp ; + # exit 1 ; + fi ; +done + +# close link tags on open lines, append closing tag + +sed "s;[[:alnum:]]$;&</a>;" -i'' $tmp +echo '</nav>' >> $tmp + +# get toc line number in output, insert data from tempfile + +TOCLINE=$(grep -n 'end of header' $OUT | cut -f 1 -d :) +sed "${TOCLINE}r $tmp" -i'' $OUT + +rm $tmp # cleanup + +echo '[ok] table of contents' + +) + + +### metadata option handling + +opts=$(grep -e '^opts: ' -m 1 $IN | cut -f 2- -d ' ') + +while [ "$opts" ]; do +case "$opts" in + (*[Cc]*) + tocgen + opts=$(echo $opts | sed 's/[Cc]//g') + ;; + + (*[Hh]*) + sed "/^<header>/,/^<\/header>/d" -i'' $OUT + sed "/bg.js/d" -i'' $OUT + echo "[ok] headerless" + opts=$(echo $opts | sed 's/[Hh]//g') + ;; + + (*) + echo "[warning] metadata: unrecognized option(s)" + ;; +esac +done + + +echo "---- build complete: ${OUT} ----" |