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-rwxr-xr-xgit-gui/GIT-VERSION-GEN80
1 files changed, 80 insertions, 0 deletions
diff --git a/git-gui/GIT-VERSION-GEN b/git-gui/GIT-VERSION-GEN
new file mode 100755
index 0000000..1fb4d9b
--- /dev/null
+++ b/git-gui/GIT-VERSION-GEN
@@ -0,0 +1,80 @@
+#!/bin/sh
+
+GVF=GIT-VERSION-FILE
+DEF_VER=0.13.GITGUI
+
+LF='
+'
+
+tree_search ()
+{
+ head=$1
+ tree=$2
+ for p in $(git rev-list --parents --max-count=1 $head 2>/dev/null)
+ do
+ test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
+ vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
+ case "$vn" in
+ gitgui-[0-9]*) echo $vn; break;;
+ esac
+ done
+}
+
+# Always use the tarball version file if found, just
+# in case we are somehow contained in a larger git
+# repository that doesn't actually track our state.
+# (At least one package manager is doing this.)
+#
+# We may be a subproject, so try looking for the merge
+# commit that supplied this directory content if we are
+# not at the toplevel. We probably will always be the
+# second parent in the commit, but we shouldn't rely on
+# that fact.
+#
+# If we are at the toplevel or the merge assumption fails
+# try looking for a gitgui-* tag.
+
+if test -f version &&
+ VN=$(cat version)
+then
+ : happy
+elif prefix="$(git rev-parse --show-prefix 2>/dev/null)"
+ test -n "$prefix" &&
+ head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
+ tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
+ VN=$(tree_search $head $tree)
+ case "$VN" in
+ gitgui-[0-9]*) : happy ;;
+ *) (exit 1) ;;
+ esac
+then
+ VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
+elif VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
+ case "$VN" in
+ gitgui-[0-9]*) : happy ;;
+ *) (exit 1) ;;
+ esac
+then
+ VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
+else
+ VN="$DEF_VER"
+fi
+
+dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
+case "$dirty" in
+'')
+ ;;
+*)
+ VN="$VN-dirty" ;;
+esac
+
+if test -r $GVF
+then
+ VC=$(sed -e 's/^GITGUI_VERSION = //' <$GVF)
+else
+ VC=unset
+fi
+test "$VN" = "$VC" || {
+ echo >&2 "GITGUI_VERSION = $VN"
+ echo "GITGUI_VERSION = $VN" >$GVF
+}