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: handle images (git add them and rewrite the URL dynamically)
  15 # TODO: generate an RSS feed, too
  16 # TODO: generate TOC
  17 # TODO: have a configurable maximum number of entries per page, and links
  18 #       to older pages
  19 # TODO: include the commit name in the URL, so that images will be found
  20
  21 # make sure we're in the correct working directory
  22 cd "$(dirname "$0")"
  23
  24 GITWEBURL="$(git config gitweb.url)"
  25 test -z "$GITWEBURL" && {
  26         echo "Please set gitweb.url in the Git config first!" >&2
  27         exit 1
  28 }
  29
  30 URLPREFIX="$(dirname "$GITWEBURL")"/
  31 REMOTEREPOSITORY="$(basename "$GITWEBURL")"
  32 BRANCH=blog
  33 URL="$REMOTEREPOSITORY?a=blob_plain;hb=$BRANCH;f="
  34 CSS=blog.css
  35 NEW=new
  36 OUTPUT=index.html
  37 TEST=test.html
  38 TITLE="Dscho's blog"
  39
  40 LC_ALL=C
  41 export LC_ALL
  42
  43 die () {
  44         echo "$*" >&2
  45         exit 1
  46 }
  47
  48 nth () {
  49         # add illogical suffix
  50         case "$1" in
  51         *1?|*[04-9]) echo "$1th";;
  52         *1) echo "$1st";;
  53         *2) echo "$1nd";;
  54         *3) echo "$1rd";;
  55         esac
  56 }
  57
  58 make_chinese_hour () {
  59         case $1 in
  60         23|00) echo Rat;;
  61         01|02) echo Buffalo;;
  62         03|04) echo Tiger;;
  63         05|06) echo Rabbit;;
  64         07|08) echo Dragon;;
  65         09|10) echo Snake;;
  66         11|12) echo Horse;;
  67         13|14) echo Goat;;
  68         15|16) echo Monkey;;
  69         17|18) echo Rooster;;
  70         19|20) echo Dog;;
  71         21|22) echo Pig;;
  72         esac
  73 }
  74
  75 digit_to_roman () {
  76         case $1 in
  77         1) echo $2;;
  78         2) echo $2$2;;
  79         3) echo $2$2$2;;
  80         4) echo $2$3;;
  81         5) echo $3;;
  82         6) echo $3$2;;
  83         7) echo $3$2$2;;
  84         8) echo $3$2$2$2;;
  85         9) echo $2$4;;
  86         esac
  87 }
  88
  89 make_roman_number () {
  90         case $1 in
  91         '') ;;
  92         ?) digit_to_roman $1 I V X;;
  93         ??) echo $(digit_to_roman ${1%?} X L C)$(make_roman_number ${1#?});;
  94         ???) echo $(digit_to_roman ${1%??} C D M)$(make_roman_number ${1#?});;
  95         ????) echo $(digit_to_roman ${1%???} M)$(make_roman_number ${1#?});;
  96         esac
  97 }
  98
  99 make_date () {
 100         printf "%s, %s of %s, Anno Domini %s, at the hour of the %s\n" \
 101                 $(date +%A -d @$1) \
 102                 $(nth $(date +%e -d @$1)) \
 103                 $(date +%B -d @$1) \
 104                 $(make_roman_number $(date +%Y -d @$1)) \
 105                 $(make_chinese_hour $(date +%H -d @$1))
 106 }
 107
 108 # make an argument for sed, to replace $1..$1 by <$2>..</$2>
 109 markup_substitution () {
 110         case "$1" in
 111         ?) echo "s/$1\\([^$1]*\\)$1/<$2>\\\\1<\/$2>/g";;
 112         ??)
 113                 tmp="[^${1%?}]*"
 114                 tmp2="\\|${1%?}[^${1#?}]$tmp"
 115                 tmp3="\\($tmp\\($tmp2\\($tmp2\\($tmp2\\)\\)\\)\\)"
 116                 echo "s/$1$tmp3$1/<$2>\\\\1<\/$2>/g"
 117         ;;
 118         esac
 119 }
 120
 121 # transform markup in stdin to HTML
 122 markup () {
 123         sed -e 's!^$!</p><p>!' \
 124                 -e 's!IMHO!in my humble opinion!g' \
 125                 -e 's!repo.or.cz!<a href=http://&>&</a>!g' \
 126                 -e 's!:-)!\&#x263a;!g' \
 127                 -e "$(markup_substitution "''" i)" \
 128                 -e "$(markup_substitution "_" u)"
 129 }
 130
 131 # make HTML page
 132 make_html () {
 133         cat << EOF
 134 <html>
 135         <head>
 136                 <title>$TITLE</title>
 137                 <meta http-equiv="Content-Type"
 138                         content="text/html; charset=UTF-8"/>
 139                 <link rel="stylesheet" type="text/css" href="$URL$CSS">
 140         </head>
 141         <body>
 142                 <div class=content>
 143                         <h1>$TITLE</h1>
 144 EOF
 145
 146         # timestamps will not need padding to sort correctly, for some time...
 147         for file in $(ls -r source-*.txt)
 148         do
 149                 basename=${file%.txt}
 150                 timestamp=${basename#source-}
 151                 echo "<h6>$(make_date $timestamp)</h6>"
 152                 echo "<h2>$(sed 1q < $file | markup)</h2>"
 153                 echo ""
 154                 echo "<p>"
 155                 sed 1d < $file | markup
 156                 echo "</p>"
 157         done |
 158         sed -e 's/^./\t\t\t&/'
 159
 160         cat << EOF
 161                 </div>
 162         </body>
 163 </html>
 164 EOF
 165
 166 }
 167
 168 # parse command line option
 169 case "$1" in
 170 *dry*) DRYRUN=1; shift;;
 171 *show*) firefox "$(pwd)"/$TEST; exit;;
 172 *remote*) firefox $URLPREFIX$URL$OUTPUT; exit;;
 173 esac
 174
 175 test "$#" = 0 ||
 176 die "Usage: $0 [--dry-run]"
 177
 178 # make sure we're on the correct branch
 179 test refs/heads/$BRANCH = $(git symbolic-ref HEAD) ||
 180 die "Not on branch $BRANCH"
 181
 182 # make sure there are no uncommitted changes
 183 git update-index --refresh &&
 184 git diff-files --quiet &&
 185 git diff-index --quiet --cached HEAD ||
 186 die "Have uncommitted changes!"
 187
 188 # rename the new blog entry if it exists
 189 now=$(date +%s)
 190 test ! -f $NEW || {
 191         mv -i $NEW source-$now.txt &&
 192         git add source-$now.txt
 193 } ||
 194 die "Could not rename source.txt"
 195
 196 if test -z "$DRYRUN"
 197 then
 198         # rewrite URLs
 199         sed -e "s/url(/&$URL/g" < $CSS.in > $CSS &&
 200         git add $CSS ||
 201         die "Rewriting $CSS failed"
 202 else
 203         OUTPUT=$TEST
 204         CSS=$CSS.in
 205         URL=
 206 fi
 207
 208 make_html > $OUTPUT || die "Could not write $OUTPUT"
 209
 210 test ! -z "$DRYRUN" && exit
 211
 212 git add $OUTPUT &&
 213 git commit -s -m "Update $(make_date $now)" &&
 214 git push origin +$BRANCH