1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
#!/bin/sh
set -e
usage="usage:
./md.sh <target dir>
./md.sh <input md> <output html>"
# input: <target dir>/src.md ./md-header ./md-footer <site root>/nav.html
# output: <target dir>/index.html
# dependencies: lowdown
# Copyright 2019-2021 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/>.
IN="$1/src.md"
OUT="$1/index.html"
[ "$2" ] && { IN="$1" ; OUT="$2" ; }
[ "$1" ] || { echo "$usage" ; exit 1 ; }
[ -f $IN ] || { printf "[err] \t%s not found\n" "$IN" ; exit 1 ; }
[ -f md-header ] || { printf "[err] \tmd-header not found\n" ; exit 1 ; }
[ -f md-footer ] || { printf "[err] \tmd-footer not found\n" ; exit 1 ; }
[ -e $(which lowdown) ] || { printf "[err] \tlowdown not found\n" ; exit 1 ; }
cat md-header > $OUT
lowdown -Thtml --html-no-owasp $IN >> $OUT
cat md-footer >> $OUT
printf "[ok] \tinitial assembly\n"
sedesc() {
sed -e 's;&;\\\&;g' -e 's/;/\\\;/g'
}
unesc() {
sed -e 's;\\\&;\&;g' -e 's/\\\;/;/g'
}
TITLE=$(grep -e '^title: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc)
sed "s/<title>/&${TITLE} \&mdash\; DistressNetwork°/1" -i'' $OUT
printf "[ok] \ttitle: %s\n" "$(echo "$TITLE" | unesc)"
BOMBER=$(grep -e '^bomber: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc)
sed "s/<div class=\"bomber\">/&${BOMBER}/1" -i'' $OUT
printf "[ok] \tbomber: %s\n" "$(echo "$BOMBER" | unesc)"
# format: "yyyy-mm-dd hh:mm:ss±zz:zz" (ISO 8601)
MDATE=$(stat -c '%y' $IN | sed -e 's/\.[0-9]* //' -e 's/\(..\)\(..\)$/\1:\2/')
# format: "yymmdd" (for humans)
DATE=$(echo $MDATE | cut -f 1 -d ' ' | sed -e 's/-//g' -e 's/^..//')
sed -e "s;<div class=\"ident\"><time datetime=\";&${MDATE};1" -e "s;</time>;${DATE}&;1" -i'' $OUT
sed "s;<meta http-equiv=\"last-modified\" content=\";&${MDATE};1" -i'' $OUT
printf "[ok] \tdate: %s (%s)\n" "$DATE" "$MDATE"
LEADING=$(grep -e '^leading: ' -m 1 $IN | cut -f 2- -d ' ' | sedesc)
sed "s;<div class=\"leading\">;&${LEADING};1" -i'' $OUT
printf "[ok] \tleading: %s\n" "$(echo "$LEADING" | unesc)"
METADESC="\«\;${BOMBER}\»\; \&mdash\; ${LEADING}"
sed "s;<meta name=\"description\" content=\";&${METADESC};1" -i'' $OUT
printf "[ok] \tmeta description\n"
if [ -f $(echo $IN | cut -f 1 -d /)/nav.html ] ; then
NAVLINE=$(grep -n '<nav>' $OUT | cut -f 1 -d :) ;
sed "${NAVLINE}r $(echo $OUT | cut -f 1 -d /)/nav.html" -i'' $OUT ;
sed '/^<!--title:/d' -i'' $OUT ;
printf "[ok] \tsitemap\n" ;
fi
[ "$(grep -n '<p><img' $OUT)" ] && { # skip if no figures found
# escaping backslashes with '@', to be unescaped later:
grep -n '<p><img' $OUT | sed 's/\\/@/g' | \
while IFS='' read -r data ; do
LINE=$(echo $data | cut -f 1 -d :) ; # extract line number
FILE=$(echo $data | cut -f 2 -d \") ; # extract file path
CAPT=$(echo $data | cut -f 4 -d \") ; # extract image caption
if [ "$FILE" = "%tex" ] ; then # for tex figures (to be caught and rendered later)
sed "${LINE}s;.*;<figure><%tex \"${CAPT}\" /></figure>;" -i'' $OUT ;
else
sed "${LINE}s;.*;<figure><a href=\"${FILE}\"><img src=\"${FILE}\" alt=\"\"></a><figcaption><p>${CAPT}</p></figcaption></figure>;" -i'' $OUT ;
printf "[ok] \timage at line %s\n" "$LINE" ;
fi
done
}
toc() {
tmp=$(mktemp -p /tmp)
# format headers from source as md list
grep -e '^#' $IN | sed -e 's; ;- ;' -e 's;^#;;' -e 's;#; ;g' > $tmp
# convert to html, write to tempfile (reset)
buffer=$(cat $tmp) ; echo "$buffer" | lowdown -Thtml > $tmp
# prepend starting tag, remove empty lines
sed -e '1i <nav class="toc">' -e '/^$/d' -i'' $tmp
# get queue of headers from output
HEADERS=$(grep -e "^<h[[:digit:]] id=" $OUT)
# for each toc list item:
cat $tmp | grep -e "^<li>" | while IFS='' read -r data ; do
# get next header in queue, extract id
HEADER=$(echo "$HEADERS" | head -n 1) ;
ID=$(echo "$HEADER" | cut -f 2 -d \" | sedesc) ;
# rewrite toc item as link with id
ITEM=$(echo "$data" | sed "s;^<li>\([^</>]*\)\(</li>\)*$;\1;" | sedesc) ;
sed -e "s;^<li>\(${ITEM}\);<li><a href=\"#${ID}\">\1;" -e "s;\([[:alnum:]]\)</li>$;\1</a></li>;" -i'' $tmp ;
# remove processed header from queue
HEADERS=$(echo "$HEADERS" | sed '1d') ;
printf "\tassembled header: %s\n" "$(echo $ITEM | unesc)" ;
done
# close link tags on open lines, append closing tag
sed "s;[[:alnum:]]$;&</a>;" -i'' $tmp
echo '</nav>' >> $tmp
# get toc line number in output, insert data from tempfile
TOCLINE=$(wc -l md-header | cut -f 1 -d ' ')
sed "${TOCLINE}r $tmp" -i'' $OUT
rm $tmp
printf "[ok] \ttable of contents\n"
}
math() {
# [ $(npx katex -V 2>&1 | grep '404 Not Found') ] && { printf "[warn] \tkatex not found, skipping math rendering\n" ; return ; }
sed '/main.css/a <link rel="stylesheet" href="/css/katex.css">' -i'' $OUT
# display / "block" style:
grep -n '<figure><%tex' $OUT | \
while IFS='' read -r data ; do
LINE=$(echo "$data" | cut -f 1 -d :) ;
EQNBODY=$(echo "$data" | cut -f 2 -d \" ) ;
printf "\trendering tex figure at line %s ... " "$LINE" ;
tmp=$(mktemp -p /tmp) ;
echo "<figure>" > $tmp ;
echo "$EQNBODY" | sed 's/@/\\/g' | npx katex -d 2>&1 >> $tmp ;
echo "</figure>" >> $tmp ;
sed ':a;N;$!ba;s/\n//g' -i'' $tmp ;
if [ $(grep "KaTeX parse error" $tmp) ] ; then
printf "\n[warn] \ttex expression at line %s contained errors, skipping\n" "$LINE" ;
else
sed "${LINE}d" -i'' $OUT ;
sed "$(expr $LINE - 1)r $tmp" -i'' $OUT ;
printf "complete\n" ;
fi ;
rm $tmp ;
done
# inline / "span" style:
sed 's;<img src="%itex" alt=".*" />;\n&\n;g' -i'' $OUT
grep -n '<img src="%itex"' $OUT | sed 's/\\/@/g' | \
while IFS='' read -r data ; do
LINE=$(echo "$data" | cut -f 1 -d :) ;
EQNBODY=$(echo "$data" | cut -f 4 -d \" ) ;
printf "\trendering inline tex figure at line %s ... " "$LINE" ;
tmp=$(mktemp -p /tmp) ;
echo "$EQNBODY" | sed 's/@/\\/g' | npx katex 2>&1 > $tmp ;
sed ':a;N;$!ba;s/\n//g' -i'' $tmp ;
if [ $(grep "KaTeX parse error" $tmp) ] ; then
printf "\n[warn] \tinline tex expression at line %s contained errors, skipping\n" "$LINE" ;
else
sed "${LINE}d" -i'' $OUT ;
sed "$(expr $LINE - 1)r $tmp" -i'' $OUT ;
printf "complete\n" ;
fi ;
rm $tmp ;
done
printf "[ok] \tmath typesetting\n"
}
opts=$(grep -e '^opts: ' -m 1 $IN | cut -f 2- -d ' ')
while [ "$opts" ] ; do
case "$opts" in
(*[Cc]*)
toc
opts=$(echo $opts | sed 's/[Cc]//g') ;;
(*[Ff]*)
sed "/^<footer>/,/^<\/footer>/d" -i'' $OUT
printf "[ok] \tfooterless\n"
opts=$(echo $opts | sed 's/[Ff]//g') ;;
(*[Hh]*)
sed -e "/^<header>/,/^<\/header>/d" -e '/^<meta name="description"/d' -i'' $OUT
sed "/bg.js/d" -i'' $OUT
printf "[ok] \theaderless\n"
opts=$(echo $opts | sed 's/[Hh]//g') ;;
(*[Mm]*)
math
opts=$(echo $opts | sed 's/[Mm]//g') ;;
(*)
printf "[warn] \tmetadata: unrecognized option(s) \"%s\"\n" "${opts}" ;;
esac
done
printf "%s \tbuild complete: %s\n" "[->]" "$OUT"
|
