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=$BRANCH;f="
  31 NEW=new
  32 OUTPUT=index.html
  33 TEST=test.html
  34 TITLE="Dscho's blog"
  35
  36 LC_ALL=C
  37 export LC_ALL
  38
  39 move_new_entry_back () {
  40         test -f source-$now.txt &&
  41         mv source-$now.txt $NEW &&
  42         git rm --cached -f source-$now.txt
  43 }
  44
  45 die () {
  46         move_new_entry_back
  47         echo "$*" >&2
  48         exit 1
  49 }
  50
  51 nth () {
  52         # add illogical suffix
  53         case "$1" in
  54         *1?|*[04-9]) echo "$1th";;
  55         *1) echo "$1st";;
  56         *2) echo "$1nd";;
  57         *3) echo "$1rd";;
  58         esac
  59 }
  60
  61 make_chinese_hour () {
  62         case $1 in
  63         23|00) echo Rat;;
  64         01|02) echo Buffalo;;
  65         03|04) echo Tiger;;
  66         05|06) echo Rabbit;;
  67         07|08) echo Dragon;;
  68         09|10) echo Snake;;
  69         11|12) echo Horse;;
  70         13|14) echo Goat;;
  71         15|16) echo Monkey;;
  72         17|18) echo Rooster;;
  73         19|20) echo Dog;;
  74         21|22) echo Pig;;
  75         esac
  76 }
  77
  78 digit_to_roman () {
  79         case $1 in
  80         1) echo $2;;
  81         2) echo $2$2;;
  82         3) echo $2$2$2;;
  83         4) echo $2$3;;
  84         5) echo $3;;
  85         6) echo $3$2;;
  86         7) echo $3$2$2;;
  87         8) echo $3$2$2$2;;
  88         9) echo $2$4;;
  89         esac
  90 }
  91
  92 make_roman_number () {
  93         case $1 in
  94         '') ;;
  95         ?) digit_to_roman $1 I V X;;
  96         ??) echo $(digit_to_roman ${1%?} X L C)$(make_roman_number ${1#?});;
  97         ???) echo $(digit_to_roman ${1%??} C D M)$(make_roman_number ${1#?});;
  98         ????) echo $(digit_to_roman ${1%???} M)$(make_roman_number ${1#?});;
  99         esac
 100 }
 101
 102 make_date () {
 103         printf "%s, %s of %s, Anno Domini %s, at the hour of the %s\n" \
 104                 $(date +%A -d @$1) \
 105                 $(nth $(date +%e -d @$1)) \
 106                 $(date +%B -d @$1) \
 107                 $(make_roman_number $(date +%Y -d @$1)) \
 108                 $(make_chinese_hour $(date +%H -d @$1))
 109 }
 110
 111 # make an argument for sed, to replace $1..$1 by <$2>..</$2>
 112 markup_substitution () {
 113         case "$1" in
 114         ?) echo "s/$1\\([^$1]*\\)$1/<$2>\\\\1<\/$2>/g";;
 115         ??)
 116                 tmp="[^${1%?}]*"
 117                 tmp2="\\|${1%?}[^${1#?}]$tmp"
 118                 tmp3="\\($tmp\\($tmp2\\($tmp2\\($tmp2\\)\\)\\)\\)"
 119                 echo "s/$1$tmp3$1/<$2>\\\\1<\/$2>/g"
 120         ;;
 121         esac
 122 }
 123
 124 # transform markup in stdin to HTML
 125 markup () {
 126         image_pattern="\\[\\[Image:\([^]]*\)"
 127         image_pattern2="$image_pattern\(\\|[^\]]*\)\?\]\]"
 128         sed -e 's!^$!</p><p>!' \
 129                 -e 's!IMHO!in my humble opinion!g' \
 130                 -e 's!BTW!By the way,!g' \
 131                 -e 's!repo.or.cz!<a href=http://&>&</a>!g' \
 132                 -e 's!:-)!\&#x263a;!g' \
 133                 -e "s!$image_pattern2!<center><img src=$URL\1></center>!g" \
 134                 -e 's!<bash>!<table\
 135                                 border=1 bgcolor=black>\
 136                         <tr><td bgcolor=lightblue colspan=3>\
 137                                 \&nbsp;\
 138                         </td></tr>\
 139                         <tr><td>\
 140                                 <table cellspacing=5 border=0\
 141                                          style="color:#ffffff;">\
 142                                 <tr><td>\
 143                                         <pre>!' \
 144                 -e 's!</bash>!          </pre>\
 145                                 </td></tr>\
 146                                 </table>\
 147                         </td></tr>\
 148                         </table>!' \
 149                 -e "$(markup_substitution "''" i)" \
 150                 -e "$(markup_substitution "_" u)"
 151 }
 152
 153 # make HTML page
 154 make_html () {
 155         body_style="width:800px"
 156         body_style="$body_style;background-image:url(${URL}paper.jpg)"
 157         body_style="$body_style;background-repeat:repeat-y"
 158         body_style="$body_style;background-attachment:scroll"
 159         body_style="$body_style;padding:0px;"
 160         text_style="width:610px"
 161         text_style="$text_style;margin-left:120px"
 162         text_style="$text_style;margin-top:50px"
 163         text_style="$text_style;align:left"
 164         text_style="$text_style;vertical-align:top;"
 165         cat << EOF
 166 <html>
 167         <head>
 168                 <title>$TITLE</title>
 169                 <meta http-equiv="Content-Type"
 170                         content="text/html; charset=UTF-8"/>
 171         </head>
 172         <body style="$body_style">
 173                 <div style="$text_style">
 174                         <h1>$TITLE</h1>
 175 EOF
 176         indent='\t\t\t'
 177
 178         # make toc
 179         toc_width=400px
 180         toc_style="position:absolute;top:50px;left:810px;width=$toc_width"
 181         {
 182                 echo "<div style=\"$toc_style\">"
 183                 echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 184                 echo "<tr><th>Table of contents:</th></tr>"
 185                 echo "<tr><td>"
 186                 echo '<p><ol>'
 187                 for file in $(ls -r source-*.txt)
 188                 do
 189                         basename=${file%.txt}
 190                         timestamp=${basename#source-}
 191                         date="$(date +"%d %b %Y" -d @$timestamp)"
 192                         title="$(sed 1q < $file | markup)"
 193                         echo "<li><a href=#$timestamp>$date $title</a>"
 194                 done
 195                 echo '</ol></p>'
 196                 echo '</td></tr></table>'
 197                 test -f links.html && {
 198                         echo "<br>"
 199                         echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 200                         echo "<tr><th>Links:</th></tr>"
 201                         echo "<tr><td>"
 202                         cat links.html
 203                         echo "</td></tr></table>"
 204                 }
 205                 echo '</div>'
 206         } | sed -s "s/^/$indent/"
 207
 208
 209         # timestamps will not need padding to sort correctly, for some time...
 210         for file in $(ls -r source-*.txt)
 211         do
 212                 basename=${file%.txt}
 213                 timestamp=${basename#source-}
 214                 echo "<h6>$(make_date $timestamp)</h6>"
 215                 echo "<a name=$timestamp>"
 216                 echo "<h2>$(sed 1q < $file | markup)</h2>"
 217                 echo ""
 218                 echo "<p>"
 219                 sed 1d < $file | markup
 220                 echo "</p>"
 221         done |
 222         sed -e "s/^./$indent&/" \
 223                 -e "/<pre>/,/<\/pre>/s/^$indent//"
 224
 225         cat << EOF
 226                 </div>
 227         </body>
 228 </html>
 229 EOF
 230 }
 231
 232 # never, ever have spaces in the file names
 233 commit_new_images () {
 234         images=
 235         for image in $(cat source-* |
 236                 tr ' ]|' '\n' |
 237                 sed -n 's/.*\[\[Image://p' |
 238                 sort |
 239                 uniq)
 240         do
 241                 git add $image || die "Could not git add image $image"
 242                 images="$images $image"
 243         done
 244
 245         git update-index --refresh &&
 246         git diff-files --quiet -- $images &&
 247         git diff --cached --quiet HEAD -- $images ||
 248         git commit -s -m "Commit some images on $(make_date $now)" $images
 249 }
 250
 251
 252 # parse command line option
 253 case "$1" in
 254 *dry*) DRYRUN=1; shift;;
 255 *show*) firefox "$(pwd)"/$TEST; exit;;
 256 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 257 esac
 258
 259 test "$#" = 0 ||
 260 die "Usage: $0 [--dry-run]"
 261
 262 # make sure we're on the correct branch
 263 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 264 die "Not on branch $BRANCH"
 265
 266 # make sure there are no uncommitted changes
 267 git update-index --refresh &&
 268 git diff-files --quiet ||
 269 die "Have unstaged changes!"
 270
 271 # rename the new blog entry if it exists
 272 now=$(date +%s)
 273 test ! -f $NEW || {
 274         mv -i $NEW source-$now.txt &&
 275         git add source-$now.txt
 276 } ||
 277 die "Could not rename source.txt"
 278
 279 # commit the images that are referenced and not yet committed
 280 test ! -z "$DRYRUN" ||
 281 commit_new_images ||
 282 die "Could not commit new images"
 283
 284 # to find the images reliably, we have to use the commit name, not the branch
 285 # we use the latest commit touching an image file.
 286 IMAGEFILES="$(git ls-files |
 287         grep -v '\.\(html\|gitignore\|in\|sh\|txt\)$')"
 288 REV=$(git rev-list -1 HEAD -- $IMAGEFILES)
 289 test -z "$REV" && REV=$BRANCH
 290 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$REV;f="
 291
 292 if test ! -z "$DRYRUN"
 293 then
 294         # Output to test.html and have local links into the current directory
 295         OUTPUT=$TEST
 296         URL=
 297 fi
 298
 299 make_html > $OUTPUT || die "Could not write $OUTPUT"
 300
 301 test ! -z "$DRYRUN" && {
 302         move_new_entry_back
 303         exit
 304 }
 305
 306 git add $OUTPUT &&
 307 git commit -s -m "Update $(make_date $now)" &&
 308 git push origin +$BRANCH