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|
#!/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)
# Copyright 2019-2020 DistressNetwork° <uplink@distress.network>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# 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} ----"
|
