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=$URL\1></center>!g" \
 134                 -e 's!<bash>!<table\
 135                                 border=1 bgcolor=black style="color:#ffffff;">\
 136                         <tr><td bgcolor=lightblue colspan=3>\
 137                                 \&nbsp;\
 138                         </td></tr>\
 139                         <tr><td>\
 140                                 <table cellspacing=5 border=0>\
 141                                 <tr><td>\
 142                                         <pre>!' \
 143                 -e 's!</bash>!          </pre>\
 144                                 </td></tr>\
 145                                 </table>\
 146                         </td></tr>\
 147                         </table>!' \
 148                 -e "$(markup_substitution "''" i)" \
 149                 -e "$(markup_substitution "_" u)"
 150 }
 151
 152 # make HTML page
 153 make_html () {
 154         body_style="width:800px"
 155         body_style="$body_style;background-image:url(${URL}paper.jpg)"
 156         body_style="$body_style;background-repeat:repeat-y"
 157         body_style="$body_style;background-attachment:scroll"
 158         body_style="$body_style;padding:0px;"
 159         text_style="width:610px"
 160         text_style="$text_style;margin-left:120px"
 161         text_style="$text_style;align:left"
 162         text_style="$text_style;vertical-align:top;"
 163         cat << EOF
 164 <html>
 165         <head>
 166                 <title>$TITLE</title>
 167                 <meta http-equiv="Content-Type"
 168                         content="text/html; charset=UTF-8"/>
 169         </head>
 170         <body style="$body_style">
 171                 <div style="$text_style">
 172                         <h1>$TITLE</h1>
 173 EOF
 174         indent='\t\t\t'
 175
 176         # make toc
 177         toc_width=400px
 178         toc_style="position:absolute;top:50px;left:810px;width=$toc_width"
 179         {
 180                 echo "<div style=\"$toc_style\">"
 181                 echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 182                 echo "<tr><th>Table of contents:</th></tr>"
 183                 echo "<tr><td>"
 184                 echo '<p><ol>'
 185                 for file in $(ls -r source-*.txt)
 186                 do
 187                         basename=${file%.txt}
 188                         timestamp=${basename#source-}
 189                         date="$(date +"%d %b %Y" -d @$timestamp)"
 190                         title="$(sed 1q < $file | markup)"
 191                         echo "<li><a href=#$timestamp>$date $title</a>"
 192                 done
 193                 echo '</ol></p>'
 194                 echo '</td></tr></table>'
 195                 test -f links.html && {
 196                         echo "<br>"
 197                         echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 198                         echo "<tr><th>Links:</th></tr>"
 199                         echo "<tr><td>"
 200                         cat links.html
 201                         echo "</td></tr></table>"
 202                 }
 203                 echo '</div>'
 204         } | sed -s "s/^/$indent/"
 205
 206
 207         # timestamps will not need padding to sort correctly, for some time...
 208         for file in $(ls -r source-*.txt)
 209         do
 210                 basename=${file%.txt}
 211                 timestamp=${basename#source-}
 212                 echo "<h6>$(make_date $timestamp)</h6>"
 213                 echo "<a name=$timestamp>"
 214                 echo "<h2>$(sed 1q < $file | markup)</h2>"
 215                 echo ""
 216                 echo "<p>"
 217                 sed 1d < $file | markup
 218                 echo "</p>"
 219         done |
 220         sed -e "s/^./$indent&/" \
 221                 -e "/<pre>/,/<\/pre>/s/^$indent//"
 222
 223         cat << EOF
 224                 </div>
 225         </body>
 226 </html>
 227 EOF
 228 }
 229
 230 # never, ever have spaces in the file names
 231 commit_new_images () {
 232         images=
 233         for image in $(cat source-* |
 234                 tr ' ]|' '\n' |
 235                 sed -n 's/.*\[\[Image://p' |
 236                 sort |
 237                 uniq)
 238         do
 239                 git add $image || die "Could not git add image $image"
 240                 images="$images $image"
 241         done
 242
 243         git update-index --refresh &&
 244         git diff-files --quiet -- $images &&
 245         git diff --cached --quiet HEAD -- $images ||
 246         git commit -s -m "Commit some images on $(make_date $now)" $images
 247 }
 248
 249
 250 # parse command line option
 251 case "$1" in
 252 *dry*) DRYRUN=1; shift;;
 253 *show*) firefox "$(pwd)"/$TEST; exit;;
 254 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 255 esac
 256
 257 test "$#" = 0 ||
 258 die "Usage: $0 [--dry-run]"
 259
 260 # make sure we're on the correct branch
 261 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 262 die "Not on branch $BRANCH"
 263
 264 # make sure there are no uncommitted changes
 265 git update-index --refresh &&
 266 git diff-files --quiet ||
 267 die "Have unstaged changes!"
 268
 269 # rename the new blog entry if it exists
 270 now=$(date +%s)
 271 test ! -f $NEW || {
 272         mv -i $NEW source-$now.txt &&
 273         git add source-$now.txt
 274 } ||
 275 die "Could not rename source.txt"
 276
 277 # commit the images that are referenced and not yet committed
 278 test ! -z "$DRYRUN" ||
 279 commit_new_images ||
 280 die "Could not commit new images"
 281
 282 # to find the images reliably, we have to use the commit name, not the branch
 283 # we use the latest commit touching an image file.
 284 IMAGEFILES="$(git ls-files |
 285         grep -v '\.\(html\|gitignore\|in\|sh\|txt\)$')"
 286 REV=$(git rev-list -1 HEAD -- $IMAGEFILES)
 287 test -z "$REV" && REV=$BRANCH
 288 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$REV;f="
 289
 290 if test ! -z "$DRYRUN"
 291 then
 292         # Output to test.html and have local links into the current directory
 293         OUTPUT=$TEST
 294         URL=
 295 fi
 296
 297 make_html > $OUTPUT || die "Could not write $OUTPUT"
 298
 299 test ! -z "$DRYRUN" && {
 300         move_new_entry_back
 301         exit
 302 }
 303
 304 git add $OUTPUT &&
 305 git commit -s -m "Update $(make_date $now)" &&
 306 git push origin +$BRANCH