build-utils/git-version-stamp.sh

   1 #!/bin/sh
   2 #
   3 # $1 file containing the last git-describe output
   4 # $2 the file in which to update the version string
   5 #
   6 # TODO: proper error handling
   7
   8 die()
   9 {
  10         echo "$0: WARNING: version stamp update failed."
  11         #exit 1 # not important enough to stop the build.
  12         exit 0
  13 }
  14
  15 STAMP=`cat "$1" 2> /dev/null`
  16 CURRENT=`git describe 2>/dev/null`
  17
  18 if [ -z "$STAMP" -o -z "$CURRENT" ]
  19 then
  20      die
  21 fi
  22
  23 if [ "$STAMP" != "$CURRENT" ]
  24 then
  25     echo "git version changed: $STAMP -> $CURRENT"
  26     sed -e s/$STAMP/$CURRENT/g "$2" 1> "$2.new" || die
  27     mv "$2.new" "$2"
  28     echo -n "$CURRENT" > "$1"
  29 fi