path: root/git-rebase.sh

#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano.
#

SUBDIRECTORY_OK=Yes
OPTIONS_KEEPDASHDASH=
OPTIONS_SPEC="\
git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] [<upstream>] [<branch>]
git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] --root [<branch>]
git-rebase --continue | --abort | --skip | --edit-todo
--
 Available options are
v,verbose!         display a diffstat of what changed upstream
q,quiet!           be quiet. implies --no-stat
autostash!         automatically stash/stash pop before and after
onto=!             rebase onto given branch instead of upstream
p,preserve-merges! try to recreate merges instead of ignoring them
s,strategy=!       use the given merge strategy
no-ff!             cherry-pick all commits, even if unchanged
m,merge!           use merging strategies to rebase
i,interactive!     let the user edit the list of commits to rebase
x,exec=!           add exec lines after each commit of the editable list
k,keep-empty	   preserve empty commits during rebase
f,force-rebase!    force rebase even if branch is up to date
X,strategy-option=! pass the argument through to the merge strategy
stat!              display a diffstat of what changed upstream
n,no-stat!         do not show diffstat of what changed upstream
verify             allow pre-rebase hook to run
rerere-autoupdate  allow rerere to update index with resolved conflicts
root!              rebase all reachable commits up to the root(s)
autosquash         move commits that begin with squash!/fixup! under -i
committer-date-is-author-date! passed to 'git am'
ignore-date!       passed to 'git am'
whitespace=!       passed to 'git apply'
ignore-whitespace! passed to 'git apply'
C=!                passed to 'git apply'
 Actions:
continue!          continue
abort!             abort and check out the original branch
skip!              skip current patch and continue
edit-todo!         edit the todo list during an interactive rebase
"
. git-sh-setup
. git-sh-i18n
set_reflog_action rebase
require_work_tree_exists
cd_to_toplevel

LF='
'
ok_to_skip_pre_rebase=
resolvemsg="
$(gettext 'When you have resolved this problem, run "git rebase --continue".
If you prefer to skip this patch, run "git rebase --skip" instead.
To check out the original branch and stop rebasing, run "git rebase --abort".')
"
unset onto
cmd=
strategy=
strategy_opts=
do_merge=
merge_dir="$GIT_DIR"/rebase-merge
apply_dir="$GIT_DIR"/rebase-apply
verbose=
diffstat=
test "$(git config --bool rebase.stat)" = true && diffstat=t
autostash="$(git config --bool rebase.autostash || echo false)"
git_am_opt=
rebase_root=
force_rebase=
allow_rerere_autoupdate=
# Non-empty if a rebase was in progress when 'git rebase' was invoked
in_progress=
# One of {am, merge, interactive}
type=
# One of {"$GIT_DIR"/rebase-apply, "$GIT_DIR"/rebase-merge}
state_dir=
# One of {'', continue, skip, abort}, as parsed from command line
action=
preserve_merges=
autosquash=
keep_empty=
test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t

read_basic_state () {
	test -f "$state_dir/head-name" &&
	test -f "$state_dir/onto" &&
	head_name=$(cat "$state_dir"/head-name) &&
	onto=$(cat "$state_dir"/onto) &&
	# We always write to orig-head, but interactive rebase used to write to
	# head. Fall back to reading from head to cover for the case that the
	# user upgraded git with an ongoing interactive rebase.
	if test -f "$state_dir"/orig-head
	then
		orig_head=$(cat "$state_dir"/orig-head)
	else
		orig_head=$(cat "$state_dir"/head)
	fi &&
	GIT_QUIET=$(cat "$state_dir"/quiet) &&
	test -f "$state_dir"/verbose && verbose=t
	test -f "$state_dir"/strategy && strategy="$(cat "$state_dir"/strategy)"
	test -f "$state_dir"/strategy_opts &&
		strategy_opts="$(cat "$state_dir"/strategy_opts)"
	test -f "$state_dir"/allow_rerere_autoupdate &&
		allow_rerere_autoupdate="$(cat "$state_dir"/allow_rerere_autoupdate)"
}

write_basic_state () {
	echo "$head_name" > "$state_dir"/head-name &&
	echo "$onto" > "$state_dir"/onto &&
	echo "$orig_head" > "$state_dir"/orig-head &&
	echo "$GIT_QUIET" > "$state_dir"/quiet &&
	test t = "$verbose" && : > "$state_dir"/verbose
	test -n "$strategy" && echo "$strategy" > "$state_dir"/strategy
	test -n "$strategy_opts" && echo "$strategy_opts" > \
		"$state_dir"/strategy_opts
	test -n "$allow_rerere_autoupdate" && echo "$allow_rerere_autoupdate" > \
		"$state_dir"/allow_rerere_autoupdate
}

output () {
	case "$verbose" in
	'')
		output=$("$@" 2>&1 )
		status=$?
		test $status != 0 && printf "%s\n" "$output"
		return $status
		;;
	*)
		"$@"
		;;
	esac
}

move_to_original_branch () {
	case "$head_name" in
	refs/*)
		message="rebase finished: $head_name onto $onto"
		git update-ref -m "$message" \
			$head_name $(git rev-parse HEAD) $orig_head &&
		git symbolic-ref \
			-m "rebase finished: returning to $head_name" \
			HEAD $head_name ||
		die "$(gettext "Could not move back to $head_name")"
		;;
	esac
}

finish_rebase () {
	if test -f "$state_dir/autostash"
	then
		stash_sha1=$(cat "$state_dir/autostash")
		if git stash apply $stash_sha1 2>&1 >/dev/null
		then
			echo "$(gettext 'Applied autostash.')"
		else
			git stash store -m "autostash" -q $stash_sha1 ||
			die "$(eval_gettext "Cannot store \$stash_sha1")"
			gettext 'Applying autostash resulted in conflicts.
Your changes are safe in the stash.
You can run "git stash pop" or "git stash drop" at any time.
'
		fi
	fi
	git gc --auto &&
	rm -rf "$state_dir"
}

run_specific_rebase () {
	if [ "$interactive_rebase" = implied ]; then
		GIT_EDITOR=:
		export GIT_EDITOR
		autosquash=
	fi
	. git-rebase--$type
	ret=$?
	if test $ret -eq 0
	then
		finish_rebase
	fi
	exit $ret
}

run_pre_rebase_hook () {
	if test -z "$ok_to_skip_pre_rebase" &&
	   test -x "$GIT_DIR/hooks/pre-rebase"
	then
		"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} ||
		die "$(gettext "The pre-rebase hook refused to rebase.")"
	fi
}

test -f "$apply_dir"/applying &&
	die "$(gettext "It looks like git-am is in progress. Cannot rebase.")"

if test -d "$apply_dir"
then
	type=am
	state_dir="$apply_dir"
elif test -d "$merge_dir"
then
	if test -f "$merge_dir"/interactive
	then
		type=interactive
		interactive_rebase=explicit
	else
		type=merge
	fi
	state_dir="$merge_dir"
fi
test -n "$type" && in_progress=t

total_argc=$#
while test $# != 0
do
	case "$1" in
	--no-verify)
		ok_to_skip_pre_rebase=yes
		;;
	--verify)
		ok_to_skip_pre_rebase=
		;;
	--continue|--skip|--abort|--edit-todo)
		test $total_argc -eq 2 || usage
		action=${1##--}
		;;
	--onto)
		test 2 -le "$#" || usage
		onto="$2"
		shift
		;;
	-x)
		test 2 -le "$#" || usage
		cmd="${cmd}exec $2${LF