git-gui/GIT-VERSION-GEN

   1 #!/bin/sh
   2
   3 GVF=GIT-VERSION-FILE
   4 DEF_VER=0.6.GITGUI
   5
   6 LF='
   7 '
   8
   9 tree_search ()
  10 {
  11         head=$1
  12         tree=$2
  13         for p in $(git rev-list --parents --max-count=1 $head 2>/devnull)
  14         do
  15                 test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
  16                 vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
  17                 case "$vn" in
  18                 gitgui-[0-9]*) echo $vn; break;;
  19                 esac
  20         done
  21 }
  22
  23 # We may be a subproject, so try looking for the merge
  24 # commit that supplied this directory content if we are
  25 # not at the toplevel.  We probably will always be the
  26 # second parent in the commit, but we shouldn't rely on
  27 # that fact.
  28 #
  29 # If we are at the toplevel or the merge assumption fails
  30 # try looking for a gitgui-* tag, or fallback onto the
  31 # distributed version file.
  32
  33 if prefix="$(git rev-parse --show-prefix 2>/dev/null)"
  34    test -n "$prefix" &&
  35    head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
  36    tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
  37    VN=$(tree_search $head $tree)
  38    case "$VN" in
  39    gitgui-[0-9]*) : happy ;;
  40    *) (exit 1) ;;
  41    esac
  42 then
  43         VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
  44 elif VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
  45    case "$VN" in
  46    gitgui-[0-9]*) : happy ;;
  47    *) (exit 1) ;;
  48    esac
  49 then
  50         VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
  51 elif test -f version
  52 then
  53         VN=$(cat version) || VN="$DEF_VER"
  54 else
  55         VN="$DEF_VER"
  56 fi
  57
  58 dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
  59 case "$dirty" in
  60 '')
  61         ;;
  62 *)
  63         VN="$VN-dirty" ;;
  64 esac
  65
  66 if test -r $GVF
  67 then
  68         VC=$(sed -e 's/^GITGUI_VERSION = //' <$GVF)
  69 else
  70         VC=unset
  71 fi
  72 test "$VN" = "$VC" || {
  73         echo >&2 "GITGUI_VERSION = $VN"
  74         echo "GITGUI_VERSION = $VN" >$GVF
  75 }
  76
  77