GIT-VERSION-GEN

   1 #!/bin/sh
   2
   3 if test $# -ne 1; then
   4         echo >&2 "usage: $0 <version file>"
   5         exit 1
   6 fi
   7
   8 GVF="$1"
   9 DEF_VER="unnamed_version"
  10
  11 LF='
  12 '
  13
  14 # First see if there is a version file (included in release tarballs),
  15 # then try git-describe, then default.
  16 if test -f VERSION
  17 then
  18         VN=$(cat VERSION) || VN="$DEF_VER"
  19 elif test -d .git -o -f .git &&
  20         VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
  21         case "$VN" in
  22         *$LF*) (exit 1) ;;
  23         v[0-9]*)
  24                 git update-index -q --refresh
  25                 test -z "$(git diff-index --name-only HEAD --)" ||
  26                 VN="$VN-dirty" ;;
  27         esac
  28 then
  29         VN=$(echo "$VN" | sed -e 's/-/./g');
  30 else
  31         VN="$DEF_VER"
  32 fi
  33
  34 VN=$(expr "$VN" : v*'\(.*\)')
  35
  36 if test -r $GVF
  37 then
  38         VC=$(sed -e 's/^GIT_VERSION = //' <$GVF)
  39 else
  40         VC=unset
  41 fi
  42 test "$VN" = "$VC" || {
  43         echo >&2 "GIT_VERSION = $VN"
  44         echo "GIT_VERSION = $VN" >$GVF
  45 }