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: generate TOC
  16 # TODO: have a configurable maximum number of entries per page, and links
  17 #       to older pages
  18
  19 # make sure we're in the correct working directory
  20 cd "$(dirname "$0")"
  21
  22 GITWEBURL="$(git config gitweb.url)"
  23 test -z "$GITWEBURL" && {
  24         echo "Please set gitweb.url in the Git config first!" >&2
  25         exit 1
  26 }
  27
  28 URLPREFIX="$(dirname "$GITWEBURL")"/
  29 REMOTEREPOSITORY="$(basename "$GITWEBURL")"
  30 BRANCH=blog
  31 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$BRANCH;f="
  32 CSS=blog.css
  33 NEW=new
  34 OUTPUT=index.html
  35 TEST=test.html
  36 TITLE="Dscho's blog"
  37
  38 LC_ALL=C
  39 export LC_ALL
  40
  41 move_new_entry_back () {
  42         test -f source-$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         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_pattern\(\\|[^\]]*\)\?\]\]!<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         # 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 # never, ever have spaces in the file names
 175 commit_new_images () {
 176         images=
 177         for image in $(cat source-* |
 178                 tr ' ]|' '\n' |
 179                 sed -n 's/.*\[\[Image://p' |
 180                 sort |
 181                 uniq)
 182         do
 183                 git add $image || die "Could not git add image $image"
 184                 images="$images $image"
 185         done
 186
 187         git update-index --refresh &&
 188         git diff --cached --quiet HEAD ||
 189         git commit -s -m "Commit some images on $(make_date $now)" $images
 190 }
 191
 192
 193 # parse command line option
 194 case "$1" in
 195 *dry*) DRYRUN=1; shift;;
 196 *show*) firefox "$(pwd)"/$TEST; exit;;
 197 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 198 esac
 199
 200 test "$#" = 0 ||
 201 die "Usage: $0 [--dry-run]"
 202
 203 # make sure we're on the correct branch
 204 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 205 die "Not on branch $BRANCH"
 206
 207 # make sure there are no uncommitted changes
 208 git update-index --refresh &&
 209 git diff-files --quiet &&
 210 git diff-index --quiet --cached HEAD ||
 211 die "Have uncommitted changes!"
 212
 213 # rename the new blog entry if it exists
 214 now=$(date +%s)
 215 test ! -f $NEW || {
 216         mv -i $NEW source-$now.txt &&
 217         git add source-$now.txt
 218 } ||
 219 die "Could not rename source.txt"
 220
 221 # commit the images that are referenced and not yet committed
 222 test ! -z "$DRYRUN" ||
 223 commit_new_images ||
 224 die "Could not commit new images"
 225
 226 # to find the images reliably, we have to use the commit name, not the branch
 227 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$(git rev-parse --verify $BRANCH);f="
 228
 229 # Rewrite the URL in the .css file if we're not running dry
 230 if test -z "$DRYRUN"
 231 then
 232         # rewrite URLs
 233         sed -e "s/url(/&$URL/g" < $CSS.in > $CSS &&
 234         git add $CSS ||
 235         die "Rewriting $CSS failed"
 236 else
 237         OUTPUT=$TEST
 238         CSS=$CSS.in
 239         URL=
 240 fi
 241
 242 make_html > $OUTPUT || die "Could not write $OUTPUT"
 243
 244 test ! -z "$DRYRUN" && {
 245         move_new_entry_back
 246         exit
 247 }
 248
 249 git add $OUTPUT &&
 250 git commit -s -m "Update $(make_date $now)" &&
 251 git push origin +$BRANCH