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=$BRANCH;f="
  31 ORIGURL=$URL
  32 NEW=new
  33 OUTPUT=index.html
  34 RSS=blog.rss
  35 TEST=test.html
  36 TITLE="Dscho's blog"
  37
  38 LC_ALL=C
  39 export LC_ALL
  40
  41 move_new_entry_back () {
  42         test -f source-$now.txt &&
  43         mv source-$now.txt $NEW &&
  44         git rm --cached -f source-$now.txt
  45 }
  46
  47 die () {
  48         move_new_entry_back
  49         echo "$*" >&2
  50         exit 1
  51 }
  52
  53 nth () {
  54         # add illogical suffix
  55         case "$1" in
  56         *1?|*[04-9]) echo "$1th";;
  57         *1) echo "$1st";;
  58         *2) echo "$1nd";;
  59         *3) echo "$1rd";;
  60         esac
  61 }
  62
  63 make_chinese_hour () {
  64         case $1 in
  65         23|00) echo Rat;;
  66         01|02) echo Buffalo;;
  67         03|04) echo Tiger;;
  68         05|06) echo Rabbit;;
  69         07|08) echo Dragon;;
  70         09|10) echo Snake;;
  71         11|12) echo Horse;;
  72         13|14) echo Goat;;
  73         15|16) echo Monkey;;
  74         17|18) echo Rooster;;
  75         19|20) echo Dog;;
  76         21|22) echo Pig;;
  77         esac
  78 }
  79
  80 digit_to_roman () {
  81         case $1 in
  82         1) echo $2;;
  83         2) echo $2$2;;
  84         3) echo $2$2$2;;
  85         4) echo $2$3;;
  86         5) echo $3;;
  87         6) echo $3$2;;
  88         7) echo $3$2$2;;
  89         8) echo $3$2$2$2;;
  90         9) echo $2$4;;
  91         esac
  92 }
  93
  94 make_roman_number () {
  95         case $1 in
  96         '') ;;
  97         ?) digit_to_roman $1 I V X;;
  98         ??) echo $(digit_to_roman ${1%?} X L C)$(make_roman_number ${1#?});;
  99         ???) echo $(digit_to_roman ${1%??} C D M)$(make_roman_number ${1#?});;
 100         ????) echo $(digit_to_roman ${1%???} M)$(make_roman_number ${1#?});;
 101         esac
 102 }
 103
 104 make_date () {
 105         printf "%s, %s of %s, Anno Domini %s, at the hour of the %s\n" \
 106                 $(date +%A -d @$1) \
 107                 $(nth $(date +%e -d @$1)) \
 108                 $(date +%B -d @$1) \
 109                 $(make_roman_number $(date +%Y -d @$1)) \
 110                 $(make_chinese_hour $(date +%H -d @$1))
 111 }
 112
 113 # make an argument for sed, to replace $1..$1 by <$2>..</$2>
 114 markup_substitution () {
 115         case "$1" in
 116         ?) echo "s/$1\\([^$1]*\\)$1/<$2>\\\\1<\/$2>/g";;
 117         ??)
 118                 tmp="[^${1%?}]*"
 119                 tmp2="\\|${1%?}[^${1#?}]$tmp"
 120                 tmp3="\\($tmp\\($tmp2\\($tmp2\\($tmp2\\)\\)\\)\\)"
 121                 echo "s/$1$tmp3$1/<$2>\\\\1<\/$2>/g"
 122         ;;
 123         esac
 124 }
 125
 126 # transform markup in stdin to HTML
 127 markup () {
 128         image_pattern="\\[\\[Image:\([^]]*\)"
 129         image_pattern2="$image_pattern\(\\|[^\]]*\)\?\]\]"
 130         sed -e 's!^$!</p><p>!' \
 131                 -e 's!IMHO!in my humble opinion!g' \
 132                 -e 's!BTW!By the way,!g' \
 133                 -e 's!repo.or.cz!<a href=http://&>&</a>!g' \
 134                 -e 's!:-)!\&#x263a;!g' \
 135                 -e "s!$image_pattern2!<center><img src=$URL\1></center>!g" \
 136                 -e 's!<bash>!<table\
 137                                 border=1 bgcolor=black>\
 138                         <tr><td bgcolor=lightblue colspan=3>\
 139                                 \&nbsp;\
 140                         </td></tr>\
 141                         <tr><td>\
 142                                 <table cellspacing=5 border=0\
 143                                          style="color:#ffffff;">\
 144                                 <tr><td>\
 145                                         <pre>!' \
 146                 -e 's!</bash>!          </pre>\
 147                                 </td></tr>\
 148                                 </table>\
 149                         </td></tr>\
 150                         </table>!' \
 151                 -e "$(markup_substitution "''" i)" \
 152                 -e "$(markup_substitution "_" u)"
 153 }
 154
 155 # output lines containing <timestamp> <filename> <title>
 156 get_blog_entries () {
 157         for file in $(ls -r source-*.txt)
 158         do
 159                 basename=${file%.txt}
 160                 timestamp=${basename#source-}
 161                 title="$(sed 1q < $file | markup)"
 162                 echo "$timestamp $file $title"
 163         done
 164 }
 165
 166 # make HTML page
 167 make_html () {
 168         body_style="width:800px"
 169         body_style="$body_style;background-image:url(${URL}paper.jpg)"
 170         body_style="$body_style;background-repeat:repeat-y"
 171         body_style="$body_style;background-attachment:scroll"
 172         body_style="$body_style;padding:0px;"
 173         text_style="width:610px"
 174         text_style="$text_style;margin-left:120px"
 175         text_style="$text_style;margin-top:50px"
 176         text_style="$text_style;align:left"
 177         text_style="$text_style;vertical-align:top;"
 178         cat << EOF
 179 <html>
 180         <head>
 181                 <title>$TITLE</title>
 182                 <meta http-equiv="Content-Type"
 183                         content="text/html; charset=UTF-8"/>
 184         </head>
 185         <body style="$body_style">
 186                 <div style="$text_style">
 187                         <h1>$TITLE</h1>
 188 EOF
 189         indent='\t\t\t'
 190
 191         # make toc
 192         toc_width=400px
 193         toc_style="position:absolute;top:50px;left:810px;width=$toc_width"
 194         {
 195                 echo "<div style=\"$toc_style\">"
 196                 echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 197                 echo "<tr><th>Table of contents:</th></tr>"
 198                 echo "<tr><td>"
 199                 echo '<p><ol>'
 200                 get_blog_entries |
 201                 while read timestamp filename title
 202                 do
 203                         date="$(date +"%d %b %Y" -d @$timestamp)"
 204                         echo "<li><a href=#$timestamp>$date $title</a>"
 205                 done
 206                 echo '</ol></p>'
 207                 echo '</td></tr></table>'
 208
 209                 # Links
 210                 test -f links.html && {
 211                         echo "<br>"
 212                         echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 213                         echo "<tr><th>Links:</th></tr>"
 214                         echo "<tr><td>"
 215                         cat links.html
 216                         echo "</td></tr></table>"
 217                 }
 218
 219                 # Google AdSense
 220                 test -z "$DRYRUN" && {
 221                         echo "<br>"
 222                         echo "<table width=$toc_width bgcolor=#e0e0e0 border=1>"
 223                         echo "<tr><td align=center>"
 224                         cat << EOF
 225 <script type="text/javascript"><!--
 226 google_ad_client = "pub-5106407705643819";
 227 /* 300x250, created 1/22/09 */
 228 google_ad_slot = "6468207338";
 229 google_ad_width = 300;
 230 google_ad_height = 250;
 231 //-->
 232 </script>
 233 <script type="text/javascript"
 234 src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
 235 </script>
 236 EOF
 237                         echo "</td></tr></table>"
 238                 }
 239
 240                 # RSS feed
 241                 rss_style="background-color:orange;text-decoration:none"
 242                 rss_style="$rss_style;color:white;"
 243                 echo '<br>'
 244                 echo '<div style="text-align:right;">'
 245                 echo "<a href=\"$ORIGURL$RSS\""
 246                 echo '   title="Subscribe to my RSS feed"'
 247                 echo '   class="rss" rel="nofollow"'
 248                 echo "   style=\"$rss_style\">RSS</a>"
 249                 echo '</div>'
 250
 251                 echo '</div>'
 252         } | sed -s "s/^/$indent/"
 253
 254
 255         # timestamps will not need padding to sort correctly, for some time...
 256         get_blog_entries |
 257         while read timestamp filename title
 258         do
 259                 echo "<h6>$(make_date $timestamp)</h6>"
 260                 echo "<a name=$timestamp>"
 261                 echo "<h2>$title</h2>"
 262                 echo ""
 263                 echo "<p>"
 264                 sed 1d < $filename | markup
 265                 echo "</p>"
 266         done |
 267         sed -e "s/^./$indent&/" \
 268                 -e "/<pre>/,/<\/pre>/s/^$indent//"
 269
 270         cat << EOF
 271                 </div>
 272         </body>
 273 </html>
 274 EOF
 275 }
 276
 277 generate_rss () {
 278         echo '<?xml version="1.0" encoding="utf-8"?>'
 279         echo '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">'
 280         echo '<channel>'
 281         echo "<title>Dscho's blog</title>"
 282         echo "<link>$URLPREFIX${URL}index.html</link>"
 283         self="$URLPREFIX$ORIGURL$RSS"
 284         selfattribs='rel="self" type="application/rss+xml"'
 285         echo "<atom:link href=\"$self\" $selfattribs/>"
 286         echo '<description>A few stories told by Dscho</description>'
 287         echo "<lastBuildDate>$(date --rfc-2822)</lastBuildDate>"
 288         echo '<language>en-us</language>'
 289
 290         get_blog_entries |
 291         while read timestamp filename title
 292         do
 293                 echo '<item>'
 294                 echo "<title>$title</title>"
 295                 echo "<link>$URLPREFIX${URL}index.html#$timestamp</link>"
 296                 echo "<guid>$URLPREFIX${URL}index.html#$timestamp</guid>"
 297                 echo "<pubDate>$(date --rfc-2822 -d @$timestamp)</pubDate>"
 298                 description="$(cat < $filename | markup)"
 299                 echo "<description><![CDATA[$description]]></description>"
 300                 echo "</item>"
 301         done
 302
 303         echo '</channel>'
 304         echo '</rss>'
 305 }
 306
 307 # never, ever have spaces in the file names
 308 commit_new_images () {
 309         generate_rss > $RSS &&
 310         git add $RSS ||
 311         die "Could not generate $RSS"
 312
 313         images=
 314         for image in $(cat source-* |
 315                 tr ' ]|' '\n' |
 316                 sed -n 's/.*\[\[Image://p' |
 317                 sort |
 318                 uniq)
 319         do
 320                 git add $image || die "Could not git add image $image"
 321                 images="$images $image"
 322         done
 323
 324         git update-index --refresh &&
 325         git diff-files --quiet -- $images &&
 326         git diff --cached --quiet HEAD -- $images ||
 327         git commit -s -m "Commit some images on $(make_date $now)" $images
 328 }
 329
 330
 331
 332 # parse command line option
 333 case "$1" in
 334 *dry*) DRYRUN=1; shift;;
 335 *show*) firefox "$(pwd)"/$TEST; exit;;
 336 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 337 esac
 338
 339 test "$#" = 0 ||
 340 die "Usage: $0 [--dry-run]"
 341
 342 # make sure we're on the correct branch
 343 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 344 die "Not on branch $BRANCH"
 345
 346 # make sure there are no uncommitted changes
 347 git update-index --refresh &&
 348 git diff-files --quiet ||
 349 die "Have unstaged changes!"
 350
 351 # rename the new blog entry if it exists
 352 now=$(date +%s)
 353 test ! -f $NEW || {
 354         mv -i $NEW source-$now.txt &&
 355         git add source-$now.txt
 356 } ||
 357 die "Could not rename source.txt"
 358
 359 # commit the images that are referenced and not yet committed
 360 test ! -z "$DRYRUN" ||
 361 commit_new_images ||
 362 die "Could not commit new images"
 363
 364 # to find the images reliably, we have to use the commit name, not the branch
 365 # we use the latest commit touching an image file.
 366 IMAGEFILES="$(git ls-files |
 367         grep -v '\.\(html\|gitignore\|in\|sh\|txt\)$')"
 368 REV=$(git rev-list -1 HEAD -- $IMAGEFILES)
 369 test -z "$REV" && REV=$BRANCH
 370 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$REV;f="
 371
 372 if test ! -z "$DRYRUN"
 373 then
 374         # Output to test.html and have local links into the current directory
 375         OUTPUT=$TEST
 376         URL=
 377 fi
 378
 379 make_html > $OUTPUT || die "Could not write $OUTPUT"
 380
 381 test ! -z "$DRYRUN" && {
 382         move_new_entry_back
 383         exit
 384 }
 385
 386 git add $OUTPUT &&
 387 git commit -s -m "Update $(make_date $now)" &&
 388 git push origin +$BRANCH