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#!/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
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
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 "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
read_basic_state () {
head_name=$(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 $head_name")"
;;
esac
}
run_specific_rebase () {
if [ "$interactive_rebase" = implied ]; then
GIT_EDITOR=:
export GIT_EDITOR
autosquash=
fi
. git-rebase--$type
}
run_pre_rebase_hook () {
if test -z "$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}"
shift
;;
-i)
interactive_rebase=explicit
;;
-k)
keep_empty=yes
;;
-p)
preserve_merges=t
test -z "$interactive_rebase" && interactive_rebase=implied
;;
--autosquash)
autosquash=t
;;
--no-autosquash)
autosquash=
;;
-M|-m)
do_merge=t
;;
-X)
shift
strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--$1")"
do_merge=t
test -z "$strategy" && strategy=recursive
;;
-s)
shift
strategy="$1"
do_merge=t
;;
-n)
diffstat=
;;
--stat)
diffstat=t
;;
-v)
verbose=t
diffstat=t
GIT_QUIET=
;;
-q)
GIT_QUIET=t
git_am_opt="$git_am_opt -q"
verbose=
diffstat=
;;
--whitespace)
shift
git_am_opt="$git_am_opt --whitespace=$1"
case "$1" in
fix|strip)
force_rebase=t
;;
esac
;;
--ignore-whitespace)
git_am_opt="$git_am_opt $1"
;;
--committer-date-is-author-date|--ignore-date)
git_am_opt="$git_am_opt $1"
force_rebase=t
;;
-C)
shift
git_am_opt="$git_am_opt -C$1"
;;
--root)
rebase_root=t
;;
-f|--no-ff)
force_rebase=t
;;
--rerere-autoupdate|--no-rerere-autoupdate)
allow_rerere_autoupdate="$1"
;;
--)
shift
break
;;
esac
shift
done
test $# -gt 2 && usage
if test -n "$cmd" &&
test "$interactive_rebase" != explicit
then
die "$(gettext "The --exec option must be used with the --interactive option")"
fi
if test -n "$action"
then
test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
# Only interactive rebase uses detailed reflog messages
if test "$type" = interactive && test "$GIT_REFLOG_ACTION" = rebase
then
GIT_REFLOG_ACTION="rebase -i ($action)"
export GIT_REFLOG_ACTION
fi
fi
if test "$action" = "edit-todo" && test "$type" != "interactive"
then
die "$(gettext "The --edit-todo action can only be used during interactive rebase.")"
fi
case "$action" in
continue)
# Sanity check
git rev-parse --verify HEAD >/dev/null ||
die "$(gettext "Cannot read HEAD")"
git update-index --ignore-submodules --refresh &&
git diff-files --quiet --ignore-submodules || {
echo "$(gettext "You must edit all merge conflicts and then
mark them as resolved using git add")"
exit 1
}
read_basic_state
run_specific_rebase
;;
skip)
output git reset --hard HEAD || exit $?
read_basic_state
run_specific_rebase
;;
abort)
git rerere clear
read_basic_state
case "$head_name" in
refs/*)
git symbolic-ref -m "rebase: aborting" HEAD $head_name ||
die "$(eval_gettext "Could not move back to \$head_name")"
;;
esac
output git reset --hard $orig_head
rm -r "$state_dir"
exit
;;
edit-todo)
run_specific_rebase
;;
esac
# Make sure no rebase is in progress
if test -n "$in_progress"
then
state_dir_base=${state_dir##*/}
cmd_live_rebase="git rebase (--continue | --abort | --skip)"
cmd_clear_stale_rebase="rm -fr \"$state_dir\""
die "
$(eval_gettext 'It seems that there is already a $state_dir_base directory, and
I wonder if you are in the middle of another rebase. If that is the
case, please try
$cmd_live_rebase
If that is not the case, please
$cmd_clear_stale_rebase
and run me again. I am stopping in case you still have something
valuable there.')"
fi
if test -n "$rebase_root" && test -z "$onto"
then
test -z "$interactive_rebase" && interactive_rebase=implied
fi
if test -n "$interactive_rebase"
then
type=interactive
state_dir="$merge_dir"
elif test -n "$do_merge"
then
type=merge
state_dir="$merge_dir"
else
type=am
state_dir="$apply_dir"
fi
if test -z "$rebase_root"
then
case "$#" in
0)
if ! upstream_name=$(git rev-parse --symbolic-full-name \
--verify -q @{upstream} 2>/dev/null)
then
. git-parse-remote
error_on_missing_default_upstream "rebase" "rebase" \
"against" "git rebase <branch>"
fi
;;
*) upstream_name="$1"
shift
;;
esac
upstream=`git rev-parse --verify "${upstream_name}^0"` ||
die "$(eval_gettext "invalid upstream \$upstream_name")"
upstream_arg="$upstream_name"
else
if test -z "$onto"
then
empty_tree=`git hash-object -t tree /dev/null`
onto=`git commit-tree $empty_tree </dev/null`
squash_onto="$onto"
fi
unset upstream_name
unset upstream
test $# -gt 1 && usage
upstream_arg=--root
fi
# Make sure the branch to rebase onto is valid.
onto_name=${onto-"$upstream_name"}
case "$onto_name" in
*...*)
if left=${onto_name%...*} right=${onto_name#*...} &&
onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
then
case "$onto" in
?*"$LF"?*)
die "$(eval_gettext "\$onto_name: there are more than one merge bases")"
;;
'')
die "$(eval_gettext "\$onto_name: there is no merge base")"
;;
esac
else
die "$(eval_gettext "\$onto_name: there is no merge base")"
fi
;;
*)
onto=$(git rev-parse --verify "${onto_name}^0") ||
die "$(eval_gettext "Does not point to a valid commit: \$onto_name")"
;;
esac
# If the branch to rebase is given, that is the branch we will rebase
# $branch_name -- branch being rebased, or HEAD (already detached)
# $orig_head -- commit object name of tip of the branch before rebasing
# $head_name -- refs/heads/<that-branch> or "detached HEAD"
switch_to=
case "$#" in
1)
# Is it "rebase other $branchname" or "rebase other $commit"?
branch_name="$1"
switch_to="$1"
if git show-ref --verify --quiet -- "refs/heads/$1" &&
orig_head=$(git rev-parse -q --verify "refs/heads/$1")
then
head_name="refs/heads/$1"
elif orig_head=$(git rev-parse -q --verify "$1")
then
head_name="detached HEAD"
else
die "$(eval_gettext "fatal: no such branch: \$branch_name")"
fi
;;
0)
# Do not need to switch branches, we are already on it.
if branch_name=`git symbolic-ref -q HEAD`
then
head_name=$branch_name
branch_name=`expr "z$branch_name" : 'zrefs/heads/\(.*\)'`
else
head_name="detached HEAD"
branch_name=HEAD ;# detached
fi
orig_head=$(git rev-parse --verify HEAD) || exit
;;
*)
die "BUG: unexpected number of arguments left to parse"
;;
esac
require_clean_work_tree "rebase" "$(gettext "Please commit or stash them.")"
# Now we are rebasing commits $upstream..$orig_head (or with --root,
# everything leading up to $orig_head) on top of $onto
# Check if we are already based on $onto with linear history,
# but this should be done only when upstream and onto are the same
# and if this is not an interactive rebase.
mb=$(git merge-base "$onto" "$orig_head")
if test "$type" != interactive && test "$upstream" = "$onto" &&
test "$mb" = "$onto" &&
# linear history?
! (git rev-list --parents "$onto".."$orig_head" | sane_grep " .* ") > /dev/null
then
if test -z "$force_rebase"
then
# Lazily switch to the target branch if needed...
test -z "$switch_to" || git checkout "$switch_to" --
say "$(eval_gettext "Current branch \$branch_name is up to date.")"
exit 0
else
say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
fi
fi
# If a hook exists, give it a chance to interrupt
run_pre_rebase_hook "$upstream_arg" "$@"
if test -n "$diffstat"
then
if test -n "$verbose"
then
echo "$(eval_gettext "Changes from \$mb to \$onto:")"
fi
# We want color (if set), but no pager
GIT_PAGER='' git diff --stat --summary "$mb" "$onto"
fi
test "$type" = interactive && run_specific_rebase
# Detach HEAD and reset the tree
say "$(gettext "First, rewinding head to replay your work on top of it...")"
git checkout -q "$onto^0" || die "could not detach HEAD"
git update-ref ORIG_HEAD $orig_head
# If the $onto is a proper descendant of the tip of the branch, then
# we just fast-forwarded.
if test "$mb" = "$orig_head"
then
say "$(eval_gettext "Fast-forwarded \$branch_name to \$onto_name.")"
move_to_original_branch
exit 0
fi
if test -n "$rebase_root"
then
revisions="$onto..$orig_head"
else
revisions="$upstream..$orig_head"
fi
run_specific_rebase