# Copyright (c) 2005 Junio C Hamano.
#
+USAGE='<upstream> [<head>]'
. git-sh-setup
+case $# in 1|2) ;; *) usage ;; esac
+
# Make sure we do not have .dotest
if mkdir .dotest
then
exit 1
fi
-# The other head is given. Make sure it is valid.
-other=$(git-rev-parse --verify "$1^0") || exit
-
-# Make sure we have HEAD that is valid.
-head=$(git-rev-parse --verify "HEAD^0") || exit
-
# The tree must be really really clean.
git-update-index --refresh || exit
diff=$(git-diff-index --cached --name-status -r HEAD)
-case "$different" in
+case "$diff" in
?*) echo "$diff"
exit 1
;;
esac
+# The other head is given. Make sure it is valid.
+other=$(git-rev-parse --verify "$1^0") || usage
+
+# Make sure the branch to rebase is valid.
+head=$(git-rev-parse --verify "${2-HEAD}^0") || exit
+
+# If a hook exists, give it a chance to interrupt
+if test -x "$GIT_DIR/hooks/pre-rebase"
+then
+ "$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
+ echo >&2 "The pre-rebase hook refused to rebase."
+ exit 1
+ }
+fi
+
# If the branch to rebase is given, first switch to it.
case "$#" in
2)
- git-checkout "$2" || exit
+ git-checkout "$2" || usage
esac
-# If the HEAD is a proper descendant of $other, we do not even need
-# to rebase. Make sure we do not do needless rebase. In such a
-# case, merge-base should be the same as "$other".
mb=$(git-merge-base "$other" "$head")
+
+# Check if we are already based on $other.
if test "$mb" = "$other"
then
echo >&2 "Current branch `git-symbolic-ref HEAD` is up to date."
# Rewind the head to "$other"
git-reset --hard "$other"
+
+# If the $other is a proper descendant of the tip of the branch, then
+# we just fast forwarded.
+if test "$mb" = "$head"
+then
+ echo >&2 "Fast-forwarded $head to $other."
+ exit 0
+fi
+
git-format-patch -k --stdout --full-index "$other" ORIG_HEAD |
git am --binary -3 -k