129 lines
2.9 KiB
Bash
Executable File
129 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# Copyright (c) 2005 Junio C Hamano.
|
|
#
|
|
|
|
USAGE='[--onto <newbase>] <upstream> [<branch>]'
|
|
LONG_USAGE='If <branch> is specified, switch to that branch first. Then,
|
|
extract commits in the current branch that are not in <upstream>,
|
|
and reconstruct the current on top of <upstream>, discarding the original
|
|
development history. If --onto <newbase> is specified, the history is
|
|
reconstructed on top of <newbase>, instead of <upstream>. For example,
|
|
while on "topic" branch:
|
|
|
|
A---B---C topic
|
|
/
|
|
D---E---F---G master
|
|
|
|
$ '"$0"' --onto master~1 master topic
|
|
|
|
would rewrite the history to look like this:
|
|
|
|
|
|
A'\''--B'\''--C'\'' topic
|
|
/
|
|
D---E---F---G master
|
|
'
|
|
|
|
. git-sh-setup
|
|
|
|
unset newbase
|
|
while case "$#" in 0) break ;; esac
|
|
do
|
|
case "$1" in
|
|
--onto)
|
|
test 2 -le "$#" || usage
|
|
newbase="$2"
|
|
shift
|
|
;;
|
|
-*)
|
|
usage
|
|
;;
|
|
*)
|
|
break
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
# Make sure we do not have .dotest
|
|
if mkdir .dotest
|
|
then
|
|
rmdir .dotest
|
|
else
|
|
echo >&2 '
|
|
It seems that I cannot create a .dotest directory, and I wonder if you
|
|
are in the middle of patch application or another rebase. If that is not
|
|
the case, please rm -fr .dotest and run me again. I am stopping in case
|
|
you still have something valuable there.'
|
|
exit 1
|
|
fi
|
|
|
|
# The tree must be really really clean.
|
|
git-update-index --refresh || exit
|
|
diff=$(git-diff-index --cached --name-status -r HEAD)
|
|
case "$diff" in
|
|
?*) echo "$diff"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|
|
# The upstream head must be given. Make sure it is valid.
|
|
upstream_name="$1"
|
|
upstream=`git rev-parse --verify "${upstream_name}^0"` ||
|
|
die "invalid upsteram $upstream_name"
|
|
|
|
# If a hook exists, give it a chance to interrupt
|
|
if test -x "$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)
|
|
branch_name="$2"
|
|
git-checkout "$2" || usage
|
|
;;
|
|
*)
|
|
branch_name=`git symbolic-ref HEAD` || die "No current branch"
|
|
branch_name=`expr "$branch_name" : 'refs/heads/\(.*\)'`
|
|
;;
|
|
esac
|
|
branch=$(git-rev-parse --verify "${branch_name}^0") || exit
|
|
|
|
# Make sure the branch to rebase onto is valid.
|
|
onto_name=${newbase-"$upstream_name"}
|
|
onto=$(git-rev-parse --verify "${onto_name}^0") || exit
|
|
|
|
# Now we are rebasing commits $upstream..$branch on top of $onto
|
|
|
|
# Check if we are already based on $onto, but this should be
|
|
# done only when upstream and onto are the same.
|
|
if test "$upstream" = "onto"
|
|
then
|
|
mb=$(git-merge-base "$onto" "$branch")
|
|
if test "$mb" = "$onto"
|
|
then
|
|
echo >&2 "Current branch $branch_name is up to date."
|
|
exit 0
|
|
fi
|
|
fi
|
|
|
|
# Rewind the head to "$onto"; this saves our current head in ORIG_HEAD.
|
|
git-reset --hard "$onto"
|
|
|
|
# If the $onto is a proper descendant of the tip of the branch, then
|
|
# we just fast forwarded.
|
|
if test "$mb" = "$onto"
|
|
then
|
|
echo >&2 "Fast-forwarded $branch to $newbase."
|
|
exit 0
|
|
fi
|
|
|
|
git-format-patch -k --stdout --full-index "$upstream" ORIG_HEAD |
|
|
git am --binary -3 -k
|