upload.sh

   1 #!/bin/sh
   2
   3 # This is a simple script that will produce my blog on repo.or.cz
   4
   5 # The idea is to have source-<timestamp>.txt files as input, having the
   6 # stories, and this script turning them into nice HTML, committing
   7 # everything, and then pushing it to my repository.
   8
   9 # The blog will then be served using gitweb.
  10
  11 # To make it easier on me, if a file "source.txt" exists, it is
  12 # automatically renamed using the current timestamp.
  13
  14 # TODO: handle images (git add them and rewrite the URL dynamically)
  15 # TODO: generate an RSS feed, too
  16 # TODO: generate TOC
  17 # TODO: have a configurable maximum number of entries per page, and links
  18 #       to older pages
  19 # TODO: include the commit name in the URL, so that images will be found
  20
  21 # make sure we're in the correct working directory
  22 cd "$(dirname "$0")"
  23
  24 GITWEBURL="$(git config gitweb.url)"
  25 test -z "$GITWEBURL" && {
  26         echo "Please set gitweb.url in the Git config first!" >&2
  27         exit 1
  28 }
  29
  30 URLPREFIX="$(dirname "$GITWEBURL")"/
  31 REMOTEREPOSITORY="$(basename "$GITWEBURL")"
  32 BRANCH=blog
  33 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$BRANCH;f="
  34 CSS=blog.css
  35 NEW=new
  36 OUTPUT=index.html
  37 TEST=test.html
  38 TITLE="Dscho's blog"
  39
  40 LC_ALL=C
  41 export LC_ALL
  42
  43 move_new_entry_back () {
  44         test -f source-$now.txt &&
  45         mv source-$now.txt $NEW &&
  46         git rm --cached -f source-$now.txt
  47 }
  48
  49 die () {
  50         move_new_entry_back
  51         echo "$*" >&2
  52         exit 1
  53 }
  54
  55 nth () {
  56         # add illogical suffix
  57         case "$1" in
  58         *1?|*[04-9]) echo "$1th";;
  59         *1) echo "$1st";;
  60         *2) echo "$1nd";;
  61         *3) echo "$1rd";;
  62         esac
  63 }
  64
  65 make_chinese_hour () {
  66         case $1 in
  67         23|00) echo Rat;;
  68         01|02) echo Buffalo;;
  69         03|04) echo Tiger;;
  70         05|06) echo Rabbit;;
  71         07|08) echo Dragon;;
  72         09|10) echo Snake;;
  73         11|12) echo Horse;;
  74         13|14) echo Goat;;
  75         15|16) echo Monkey;;
  76         17|18) echo Rooster;;
  77         19|20) echo Dog;;
  78         21|22) echo Pig;;
  79         esac
  80 }
  81
  82 digit_to_roman () {
  83         case $1 in
  84         1) echo $2;;
  85         2) echo $2$2;;
  86         3) echo $2$2$2;;
  87         4) echo $2$3;;
  88         5) echo $3;;
  89         6) echo $3$2;;
  90         7) echo $3$2$2;;
  91         8) echo $3$2$2$2;;
  92         9) echo $2$4;;
  93         esac
  94 }
  95
  96 make_roman_number () {
  97         case $1 in
  98         '') ;;
  99         ?) digit_to_roman $1 I V X;;
 100         ??) echo $(digit_to_roman ${1%?} X L C)$(make_roman_number ${1#?});;
 101         ???) echo $(digit_to_roman ${1%??} C D M)$(make_roman_number ${1#?});;
 102         ????) echo $(digit_to_roman ${1%???} M)$(make_roman_number ${1#?});;
 103         esac
 104 }
 105
 106 make_date () {
 107         printf "%s, %s of %s, Anno Domini %s, at the hour of the %s\n" \
 108                 $(date +%A -d @$1) \
 109                 $(nth $(date +%e -d @$1)) \
 110                 $(date +%B -d @$1) \
 111                 $(make_roman_number $(date +%Y -d @$1)) \
 112                 $(make_chinese_hour $(date +%H -d @$1))
 113 }
 114
 115 # make an argument for sed, to replace $1..$1 by <$2>..</$2>
 116 markup_substitution () {
 117         case "$1" in
 118         ?) echo "s/$1\\([^$1]*\\)$1/<$2>\\\\1<\/$2>/g";;
 119         ??)
 120                 tmp="[^${1%?}]*"
 121                 tmp2="\\|${1%?}[^${1#?}]$tmp"
 122                 tmp3="\\($tmp\\($tmp2\\($tmp2\\($tmp2\\)\\)\\)\\)"
 123                 echo "s/$1$tmp3$1/<$2>\\\\1<\/$2>/g"
 124         ;;
 125         esac
 126 }
 127
 128 # transform markup in stdin to HTML
 129 markup () {
 130         sed -e 's!^$!</p><p>!' \
 131                 -e 's!IMHO!in my humble opinion!g' \
 132                 -e 's!repo.or.cz!<a href=http://&>&</a>!g' \
 133                 -e 's!:-)!\&#x263a;!g' \
 134                 -e "$(markup_substitution "''" i)" \
 135                 -e "$(markup_substitution "_" u)"
 136 }
 137
 138 # make HTML page
 139 make_html () {
 140         cat << EOF
 141 <html>
 142         <head>
 143                 <title>$TITLE</title>
 144                 <meta http-equiv="Content-Type"
 145                         content="text/html; charset=UTF-8"/>
 146                 <link rel="stylesheet" type="text/css" href="$URL$CSS">
 147         </head>
 148         <body>
 149                 <div class=content>
 150                         <h1>$TITLE</h1>
 151 EOF
 152
 153         # timestamps will not need padding to sort correctly, for some time...
 154         for file in $(ls -r source-*.txt)
 155         do
 156                 basename=${file%.txt}
 157                 timestamp=${basename#source-}
 158                 echo "<h6>$(make_date $timestamp)</h6>"
 159                 echo "<h2>$(sed 1q < $file | markup)</h2>"
 160                 echo ""
 161                 echo "<p>"
 162                 sed 1d < $file | markup
 163                 echo "</p>"
 164         done |
 165         sed -e 's/^./\t\t\t&/'
 166
 167         cat << EOF
 168                 </div>
 169         </body>
 170 </html>
 171 EOF
 172
 173 }
 174
 175 # parse command line option
 176 case "$1" in
 177 *dry*) DRYRUN=1; shift;;
 178 *show*) firefox "$(pwd)"/$TEST; exit;;
 179 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 180 esac
 181
 182 test "$#" = 0 ||
 183 die "Usage: $0 [--dry-run]"
 184
 185 # make sure we're on the correct branch
 186 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 187 die "Not on branch $BRANCH"
 188
 189 # make sure there are no uncommitted changes
 190 git update-index --refresh &&
 191 git diff-files --quiet &&
 192 git diff-index --quiet --cached HEAD ||
 193 die "Have uncommitted changes!"
 194
 195 # rename the new blog entry if it exists
 196 now=$(date +%s)
 197 test ! -f $NEW || {
 198         mv -i $NEW source-$now.txt &&
 199         git add source-$now.txt
 200 } ||
 201 die "Could not rename source.txt"
 202
 203 if test -z "$DRYRUN"
 204 then
 205         # rewrite URLs
 206         sed -e "s/url(/&$URL/g" < $CSS.in > $CSS &&
 207         git add $CSS ||
 208         die "Rewriting $CSS failed"
 209 else
 210         OUTPUT=$TEST
 211         CSS=$CSS.in
 212         URL=
 213 fi
 214
 215 make_html > $OUTPUT || die "Could not write $OUTPUT"
 216
 217 test ! -z "$DRYRUN" && {
 218         move_new_entry_back
 219         exit
 220 }
 221
 222 git add $OUTPUT &&
 223 git commit -s -m "Update $(make_date $now)" &&
 224 git push origin +$BRANCH