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: generate an RSS feed, too
  15 # TODO: have a configurable maximum number of entries per page, and links
  16 #       to older pages
  17
  18 # make sure we're in the correct working directory
  19 cd "$(dirname "$0")"
  20
  21 GITWEBURL="$(git config gitweb.url)"
  22 test -z "$GITWEBURL" && {
  23         echo "Please set gitweb.url in the Git config first!" >&2
  24         exit 1
  25 }
  26
  27 URLPREFIX="$(dirname "$GITWEBURL")"/
  28 REMOTEREPOSITORY="$(basename "$GITWEBURL")"
  29 BRANCH=blog
  30 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$BRANCH;f="
  31 CSS=blog.css
  32 NEW=new
  33 OUTPUT=index.html
  34 TEST=test.html
  35 TITLE="Dscho's blog"
  36
  37 LC_ALL=C
  38 export LC_ALL
  39
  40 move_new_entry_back () {
  41         test -f source-$now.txt &&
  42         mv source-$now.txt $NEW &&
  43         git rm --cached -f source-$now.txt
  44 }
  45
  46 die () {
  47         move_new_entry_back
  48         echo "$*" >&2
  49         exit 1
  50 }
  51
  52 nth () {
  53         # add illogical suffix
  54         case "$1" in
  55         *1?|*[04-9]) echo "$1th";;
  56         *1) echo "$1st";;
  57         *2) echo "$1nd";;
  58         *3) echo "$1rd";;
  59         esac
  60 }
  61
  62 make_chinese_hour () {
  63         case $1 in
  64         23|00) echo Rat;;
  65         01|02) echo Buffalo;;
  66         03|04) echo Tiger;;
  67         05|06) echo Rabbit;;
  68         07|08) echo Dragon;;
  69         09|10) echo Snake;;
  70         11|12) echo Horse;;
  71         13|14) echo Goat;;
  72         15|16) echo Monkey;;
  73         17|18) echo Rooster;;
  74         19|20) echo Dog;;
  75         21|22) echo Pig;;
  76         esac
  77 }
  78
  79 digit_to_roman () {
  80         case $1 in
  81         1) echo $2;;
  82         2) echo $2$2;;
  83         3) echo $2$2$2;;
  84         4) echo $2$3;;
  85         5) echo $3;;
  86         6) echo $3$2;;
  87         7) echo $3$2$2;;
  88         8) echo $3$2$2$2;;
  89         9) echo $2$4;;
  90         esac
  91 }
  92
  93 make_roman_number () {
  94         case $1 in
  95         '') ;;
  96         ?) digit_to_roman $1 I V X;;
  97         ??) echo $(digit_to_roman ${1%?} X L C)$(make_roman_number ${1#?});;
  98         ???) echo $(digit_to_roman ${1%??} C D M)$(make_roman_number ${1#?});;
  99         ????) echo $(digit_to_roman ${1%???} M)$(make_roman_number ${1#?});;
 100         esac
 101 }
 102
 103 make_date () {
 104         printf "%s, %s of %s, Anno Domini %s, at the hour of the %s\n" \
 105                 $(date +%A -d @$1) \
 106                 $(nth $(date +%e -d @$1)) \
 107                 $(date +%B -d @$1) \
 108                 $(make_roman_number $(date +%Y -d @$1)) \
 109                 $(make_chinese_hour $(date +%H -d @$1))
 110 }
 111
 112 # make an argument for sed, to replace $1..$1 by <$2>..</$2>
 113 markup_substitution () {
 114         case "$1" in
 115         ?) echo "s/$1\\([^$1]*\\)$1/<$2>\\\\1<\/$2>/g";;
 116         ??)
 117                 tmp="[^${1%?}]*"
 118                 tmp2="\\|${1%?}[^${1#?}]$tmp"
 119                 tmp3="\\($tmp\\($tmp2\\($tmp2\\($tmp2\\)\\)\\)\\)"
 120                 echo "s/$1$tmp3$1/<$2>\\\\1<\/$2>/g"
 121         ;;
 122         esac
 123 }
 124
 125 # transform markup in stdin to HTML
 126 markup () {
 127         image_pattern="\\[\\[Image:\([^]]*\)"
 128         image_pattern2="$image_pattern\(\\|[^\]]*\)\?\]\]"
 129         sed -e 's!^$!</p><p>!' \
 130                 -e 's!IMHO!in my humble opinion!g' \
 131                 -e 's!repo.or.cz!<a href=http://&>&</a>!g' \
 132                 -e 's!:-)!\&#x263a;!g' \
 133                 -e "s!$image_pattern2!<center><img src=$URL\1></center>!g" \
 134                 -e "$(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>$TITLE</h1>
 151 EOF
 152
 153         # make toc
 154         toc_width=400px
 155         toc_style="position:absolute;top:50px;left:810px;width=$toc_width"
 156         echo "<div style=\"$toc_style\">"
 157         echo "<table width=$toc_width bgcolor=#e0e0e0 border=1><tr><td>"
 158         echo '<p><ol>'
 159         for file in $(ls -r source-*.txt)
 160         do
 161                 basename=${file%.txt}
 162                 timestamp=${basename#source-}
 163                 date="$(date +"%d %b %Y" -d @$timestamp)"
 164                 title="$(sed 1q < $file | markup)"
 165                 echo "<li><a href=#$timestamp>$date $title</a>"
 166         done
 167         echo '</td></tr></table>'
 168         echo '</ol></p>'
 169         echo '</div>'
 170
 171
 172         # timestamps will not need padding to sort correctly, for some time...
 173         for file in $(ls -r source-*.txt)
 174         do
 175                 basename=${file%.txt}
 176                 timestamp=${basename#source-}
 177                 echo "<h6>$(make_date $timestamp)</h6>"
 178                 echo "<a name=$timestamp>"
 179                 echo "<h2>$(sed 1q < $file | markup)</h2>"
 180                 echo ""
 181                 echo "<p>"
 182                 sed 1d < $file | markup
 183                 echo "</p>"
 184         done |
 185         sed -e 's/^./\t\t\t&/'
 186
 187         cat << EOF
 188                 </div>
 189         </body>
 190 </html>
 191 EOF
 192 }
 193
 194 # never, ever have spaces in the file names
 195 commit_new_images () {
 196         images=
 197         for image in $(cat source-* |
 198                 tr ' ]|' '\n' |
 199                 sed -n 's/.*\[\[Image://p' |
 200                 sort |
 201                 uniq)
 202         do
 203                 git add $image || die "Could not git add image $image"
 204                 images="$images $image"
 205         done
 206
 207         git update-index --refresh &&
 208         git diff --cached --quiet HEAD ||
 209         git commit -s -m "Commit some images on $(make_date $now)" $images
 210 }
 211
 212
 213 # parse command line option
 214 case "$1" in
 215 *dry*) DRYRUN=1; shift;;
 216 *show*) firefox "$(pwd)"/$TEST; exit;;
 217 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 218 esac
 219
 220 test "$#" = 0 ||
 221 die "Usage: $0 [--dry-run]"
 222
 223 # make sure we're on the correct branch
 224 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 225 die "Not on branch $BRANCH"
 226
 227 # make sure there are no uncommitted changes
 228 git update-index --refresh &&
 229 git diff-files --quiet &&
 230 git diff-index --quiet --cached HEAD ||
 231 die "Have uncommitted changes!"
 232
 233 # rename the new blog entry if it exists
 234 now=$(date +%s)
 235 test ! -f $NEW || {
 236         mv -i $NEW source-$now.txt &&
 237         git add source-$now.txt
 238 } ||
 239 die "Could not rename source.txt"
 240
 241 # commit the images that are referenced and not yet committed
 242 test ! -z "$DRYRUN" ||
 243 commit_new_images ||
 244 die "Could not commit new images"
 245
 246 # to find the images reliably, we have to use the commit name, not the branch
 247 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$(git rev-parse --verify $BRANCH);f="
 248
 249 # Rewrite the URL in the .css file if we're not running dry
 250 if test -z "$DRYRUN"
 251 then
 252         # rewrite URLs
 253         sed -e "s/url(/&$URL/g" < $CSS.in > $CSS &&
 254         git add $CSS ||
 255         die "Rewriting $CSS failed"
 256 else
 257         OUTPUT=$TEST
 258         CSS=$CSS.in
 259         URL=
 260 fi
 261
 262 make_html > $OUTPUT || die "Could not write $OUTPUT"
 263
 264 test ! -z "$DRYRUN" && {
 265         move_new_entry_back
 266         exit
 267 }
 268
 269 git add $OUTPUT &&
 270 git commit -s -m "Update $(make_date $now)" &&
 271 git push origin +$BRANCH