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-rwxr-xr-xgit-legacy-rebase.sh781
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diff --git a/git-legacy-rebase.sh b/git-legacy-rebase.sh
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+++ b/git-legacy-rebase.sh
@@ -0,0 +1,781 @@
+#!/bin/sh
+#
+# Copyright (c) 2005 Junio C Hamano.
+#
+
+SUBDIRECTORY_OK=Yes
+OPTIONS_KEEPDASHDASH=
+OPTIONS_STUCKLONG=t
+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
+fork-point use 'merge-base --fork-point' to refine upstream
+onto=! rebase onto given branch instead of upstream
+r,rebase-merges? try to rebase merges instead of skipping them
+p,preserve-merges! try to recreate merges instead of ignoring them
+s,strategy=! use the given merge strategy
+X,strategy-option=! pass the argument through to the merge strategy
+no-ff! cherry-pick all commits, even if unchanged
+f,force-rebase! 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
+y=! same as --reschedule-failed-exec -x
+k,keep-empty preserve empty commits during rebase
+allow-empty-message allow rebasing commits with empty messages
+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
+signoff add a Signed-off-by: line to each commit
+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'
+S,gpg-sign? GPG-sign commits
+ 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
+quit! abort but keep HEAD where it is
+show-current-patch! show the patch file being applied or merged
+reschedule-failed-exec automatically reschedule failed exec commands
+"
+. git-sh-setup
+set_reflog_action rebase
+require_work_tree_exists
+cd_to_toplevel
+
+LF='
+'
+ok_to_skip_pre_rebase=
+
+squash_onto=
+unset onto
+unset restrict_revision
+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)"
+fork_point=auto
+git_am_opt=
+git_format_patch_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=
+rebase_merges=
+rebase_cousins=
+preserve_merges=
+autosquash=
+keep_empty=
+allow_empty_message=--allow-empty-message
+signoff=
+reschedule_failed_exec=
+test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
+case "$(git config --bool commit.gpgsign)" in
+true) gpg_sign_opt=-S ;;
+*) gpg_sign_opt= ;;
+esac
+test "$(git config --bool rebase.reschedulefailedexec)" = "true" &&
+reschedule_failed_exec=--reschedule-failed-exec
+. git-rebase--common
+
+read_basic_state () {
+ test -f "$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)"
+ test -f "$state_dir"/gpg_sign_opt &&
+ gpg_sign_opt="$(cat "$state_dir"/gpg_sign_opt)"
+ test -f "$state_dir"/signoff && {
+ signoff="$(cat "$state_dir"/signoff)"
+ force_rebase=t
+ }
+ test -f "$state_dir"/reschedule-failed-exec &&
+ reschedule_failed_exec=t
+}
+
+finish_rebase () {
+ rm -f "$(git rev-parse --git-path REBASE_HEAD)"
+ apply_autostash &&
+ { git gc --auto || true; } &&
+ rm -rf "$state_dir"
+}
+
+run_interactive () {
+ GIT_CHERRY_PICK_HELP="$resolvemsg"
+ export GIT_CHERRY_PICK_HELP
+
+ test -n "$keep_empty" && keep_empty="--keep-empty"
+ test -n "$rebase_merges" && rebase_merges="--rebase-merges"
+ test -n "$rebase_cousins" && rebase_cousins="--rebase-cousins"
+ test -n "$autosquash" && autosquash="--autosquash"
+ test -n "$verbose" && verbose="--verbose"
+ test -n "$force_rebase" && force_rebase="--no-ff"
+ test -n "$restrict_revision" && \
+ restrict_revision="--restrict-revision=^$restrict_revision"
+ test -n "$upstream" && upstream="--upstream=$upstream"
+ test -n "$onto" && onto="--onto=$onto"
+ test -n "$squash_onto" && squash_onto="--squash-onto=$squash_onto"
+ test -n "$onto_name" && onto_name="--onto-name=$onto_name"
+ test -n "$head_name" && head_name="--head-name=$head_name"
+ test -n "$strategy" && strategy="--strategy=$strategy"
+ test -n "$strategy_opts" && strategy_opts="--strategy-opts=$strategy_opts"
+ test -n "$switch_to" && switch_to="--switch-to=$switch_to"
+ test -n "$cmd" && cmd="--cmd=$cmd"
+ test -n "$action" && action="--$action"
+
+ exec git rebase--interactive "$action" "$keep_empty" "$rebase_merges" "$rebase_cousins" \
+ "$upstream" "$onto" "$squash_onto" "$restrict_revision" \
+ "$allow_empty_message" "$autosquash" "$verbose" \
+ "$force_rebase" "$onto_name" "$head_name" "$strategy" \
+ "$strategy_opts" "$cmd" "$switch_to" \
+ "$allow_rerere_autoupdate" "$gpg_sign_opt" "$signoff" \
+ "$reschedule_failed_exec"
+}
+
+run_specific_rebase () {
+ if [ "$interactive_rebase" = implied ]; then
+ GIT_EDITOR=:
+ export GIT_EDITOR
+ autosquash=
+ fi
+
+ if test -n "$interactive_rebase" -a -z "$preserve_merges"
+ then
+ run_interactive
+ else
+ . git-rebase--$type
+
+ if test -z "$preserve_merges"
+ then
+ git_rebase__$type
+ else
+ git_rebase__preserve_merges
+ fi
+ fi
+
+ ret=$?
+ if test $ret -eq 0
+ then
+ finish_rebase
+ elif test $ret -eq 2 # special exit status for rebase -p
+ then
+ apply_autostash &&
+ rm -rf "$state_dir" &&
+ die "Nothing to do"
+ fi
+ exit $ret
+}
+
+run_pre_rebase_hook () {
+ if test -z "$ok_to_skip_pre_rebase" &&
+ test -x "$(git rev-parse --git-path hooks/pre-rebase)"
+ then
+ "$(git rev-parse --git-path 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 -d "$merge_dir"/rewritten
+ then
+ type=preserve-merges
+ interactive_rebase=explicit
+ preserve_merges=t
+ elif test -f "$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|--quit|--edit-todo|--show-current-patch)
+ test $total_argc -eq 2 || usage
+ action=${1##--}
+ ;;
+ --onto=*)
+ onto="${1#--onto=}"
+ ;;
+ --exec=*)
+ cmd="${cmd}exec ${1#--exec=}${LF}"
+ test -z "$interactive_rebase" && interactive_rebase=implied
+ ;;
+ -y*)
+ reschedule_failed_exec=--reschedule-failed-exec
+ cmd="${cmd}exec ${1#-y}${LF}"
+ test -z "$interactive_rebase" && interactive_rebase=implied
+ ;;
+ --interactive)
+ interactive_rebase=explicit
+ ;;
+ --keep-empty)
+ keep_empty=yes
+ ;;
+ --allow-empty-message)
+ allow_empty_message=--allow-empty-message
+ ;;
+ --no-keep-empty)
+ keep_empty=
+ ;;
+ --rebase-merges)
+ rebase_merges=t
+ test -z "$interactive_rebase" && interactive_rebase=implied
+ ;;
+ --rebase-merges=*)
+ rebase_merges=t
+ case "${1#*=}" in
+ rebase-cousins) rebase_cousins=t;;
+ no-rebase-cousins) rebase_cousins=;;
+ *) die "Unknown mode: $1";;
+ esac
+ test -z "$interactive_rebase" && interactive_rebase=implied
+ ;;
+ --preserve-merges)
+ preserve_merges=t
+ test -z "$interactive_rebase" && interactive_rebase=implied
+ ;;
+ --autosquash)
+ autosquash=t
+ ;;
+ --no-autosquash)
+ autosquash=
+ ;;
+ --fork-point)
+ fork_point=t
+ ;;
+ --no-fork-point)
+ fork_point=
+ ;;
+ --merge)
+ do_merge=t
+ ;;
+ --strategy-option=*)
+ strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--${1#--strategy-option=}" | sed -e s/^.//)"
+ do_merge=t
+ test -z "$strategy" && strategy=recursive
+ ;;
+ --strategy=*)
+ strategy="${1#--strategy=}"
+ do_merge=t
+ ;;
+ --no-stat)
+ diffstat=
+ ;;
+ --stat)
+ diffstat=t
+ ;;
+ --autostash)
+ autostash=true
+ ;;
+ --no-autostash)
+ autostash=false
+ ;;
+ --verbose)
+ verbose=t
+ diffstat=t
+ GIT_QUIET=
+ ;;
+ --quiet)
+ GIT_QUIET=t
+ git_am_opt="$git_am_opt -q"
+ verbose=
+ diffstat=
+ ;;
+ --whitespace=*)
+ git_am_opt="$git_am_opt --whitespace=${1#--whitespace=}"
+ case "${1#--whitespace=}" in
+ fix|strip)
+ force_rebase=t
+ ;;
+ warn|nowarn|error|error-all)
+ ;; # okay, known whitespace option
+ *)
+ die "fatal: Invalid whitespace option: '${1#*=}'"
+ ;;
+ esac
+ ;;
+ --ignore-whitespace)
+ git_am_opt="$git_am_opt $1"
+ ;;
+ --signoff)
+ signoff=--signoff
+ ;;
+ --no-signoff)
+ signoff=
+ ;;
+ --committer-date-is-author-date|--ignore-date)
+ git_am_opt="$git_am_opt $1"
+ force_rebase=t
+ ;;
+ -C*[!0-9]*)
+ die "fatal: switch \`C' expects a numerical value"
+ ;;
+ -C*)
+ git_am_opt="$git_am_opt $1"
+ ;;
+ --root)
+ rebase_root=t
+ ;;
+ --force-rebase|--no-ff)
+ force_rebase=t
+ ;;
+ --rerere-autoupdate|--no-rerere-autoupdate)
+ allow_rerere_autoupdate="$1"
+ ;;
+ --gpg-sign)
+ gpg_sign_opt=-S
+ ;;
+ --gpg-sign=*)
+ gpg_sign_opt="-S${1#--gpg-sign=}"
+ ;;
+ --reschedule-failed-exec)
+ reschedule_failed_exec=--reschedule-failed-exec
+ ;;
+ --no-reschedule-failed-exec)
+ reschedule_failed_exec=
+ ;;
+ --)
+ shift
+ break
+ ;;
+ *)
+ usage
+ ;;
+ esac
+ shift
+done
+test $# -gt 2 && usage
+
+if test -n "$action"
+then
+ test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
+ # Only interactive rebase uses detailed reflog messages
+ if test -n "$interactive_rebase" && test "$GIT_REFLOG_ACTION" = rebase
+ then
+ GIT_REFLOG_ACTION="rebase -i ($action)"
+ export GIT_REFLOG_ACTION
+ fi
+fi
+
+if test "$action" = "edit-todo" && test -z "$interactive_rebase"
+then
+ die "$(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 $orig_head
+ finish_rebase
+ exit
+ ;;
+quit)
+ exec rm -rf "$state_dir"
+ ;;
+edit-todo)
+ run_specific_rebase
+ ;;
+show-current-patch)
+ run_specific_rebase
+ die "BUG: run_specific_rebase is not supposed to return here"
+ ;;
+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 "$keep_empty"
+then
+ test -z "$interactive_rebase" && interactive_rebase=implied
+fi
+
+if test -n "$interactive_rebase"
+then
+ if test -z "$preserve_merges"
+ then
+ type=interactive
+ else
+ type=preserve-merges
+ fi
+
+ 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 -t 2 && test -z "$GIT_QUIET"
+then
+ git_format_patch_opt="$git_format_patch_opt --progress"
+fi
+
+if test -n "$git_am_opt"; then
+ incompatible_opts=$(echo " $git_am_opt " | \
+ sed -e 's/ -q / /g' -e 's/^ \(.*\) $/\1/')
+ if test -n "$interactive_rebase"
+ then
+ if test -n "$incompatible_opts"
+ then
+ die "$(gettext "error: cannot combine interactive options (--interactive, --exec, --rebase-merges, --preserve-merges, --keep-empty, --root + --onto) with am options ($incompatible_opts)")"
+ fi
+ fi
+ if test -n "$do_merge"; then
+ if test -n "$incompatible_opts"
+ then
+ die "$(gettext "error: cannot combine merge options (--merge, --strategy, --strategy-option) with am options ($incompatible_opts)")"
+ fi
+ fi
+fi
+
+if test -n "$signoff"
+then
+ test -n "$preserve_merges" &&
+ die "$(gettext "error: cannot combine '--signoff' with '--preserve-merges'")"
+ git_am_opt="$git_am_opt $signoff"
+ force_rebase=t
+fi
+
+if test -n "$preserve_merges"
+then
+ # Note: incompatibility with --signoff handled in signoff block above
+ # Note: incompatibility with --interactive is just a strong warning;
+ # git-rebase.txt caveats with "unless you know what you are doing"
+ test -n "$rebase_merges" &&
+ die "$(gettext "error: cannot combine '--preserve-merges' with '--rebase-merges'")"
+
+ test -n "$reschedule_failed_exec" &&
+ die "$(gettext "error: cannot combine '--preserve-merges' with '--reschedule-failed-exec'")"
+fi
+
+if test -n "$rebase_merges"
+then
+ test -n "$strategy_opts" &&
+ die "$(gettext "error: cannot combine '--rebase-merges' with '--strategy-option'")"
+ test -n "$strategy" &&
+ die "$(gettext "error: cannot combine '--rebase-merges' with '--strategy'")"
+fi
+
+if test -z "$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 $(gettext '<branch>')"
+ fi
+
+ test "$fork_point" = auto && fork_point=t
+ ;;
+ *) upstream_name="$1"
+ if test "$upstream_name" = "-"
+ then
+ upstream_name="@{-1}"
+ fi
+ shift
+ ;;
+ esac
+ upstream=$(peel_committish "${upstream_name}") ||
+ 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=$(peel_committish "$onto_name") ||
+ 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/commit 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="$1"
+
+ # Is it a local branch?
+ if git show-ref --verify --quiet -- "refs/heads/$branch_name" &&
+ orig_head=$(git rev-parse -q --verify "refs/heads/$branch_name")
+ then
+ head_name="refs/heads/$branch_name"
+ # If not is it a valid ref (branch or commit)?
+ elif orig_head=$(git rev-parse -q --verify "$branch_name")
+ then
+ head_name="detached HEAD"
+
+ else
+ die "$(eval_gettext "fatal: no such branch/commit '\$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
+ fi
+ orig_head=$(git rev-parse --verify HEAD) || exit
+ ;;
+*)
+ die "BUG: unexpected number of arguments left to parse"
+ ;;
+esac
+
+if test "$fork_point" = t
+then
+ new_upstream=$(git merge-base --fork-point "$upstream_name" \
+ "${switch_to:-HEAD}")
+ if test -n "$new_upstream"
+ then
+ restrict_revision=$new_upstream
+ fi
+fi
+
+if test "$autostash" = true && ! (require_clean_work_tree) 2>/dev/null
+then
+ stash_sha1=$(git stash create "autostash") ||
+ die "$(gettext 'Cannot autostash')"
+
+ mkdir -p "$state_dir" &&
+ echo $stash_sha1 >"$state_dir/autostash" &&
+ stash_abbrev=$(git rev-parse --short $stash_sha1) &&
+ echo "$(eval_gettext 'Created autostash: $stash_abbrev')" &&
+ git reset --hard
+fi
+
+require_clean_work_tree "rebase" "$(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 -z "$interactive_rebase" && test "$upstream" = "$onto" &&
+ test "$mb" = "$onto" && test -z "$restrict_revision" &&
+ # 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_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $switch_to" \
+ git checkout -q "$switch_to" --
+ if test "$branch_name" = "HEAD" &&
+ ! git symbolic-ref -q HEAD
+ then
+ say "$(eval_gettext "HEAD is up to date.")"
+ else
+ say "$(eval_gettext "Current branch \$branch_name is up to date.")"
+ fi
+ finish_rebase
+ exit 0
+ else
+ if test "$branch_name" = "HEAD" &&
+ ! git symbolic-ref -q HEAD
+ then
+ say "$(eval_gettext "HEAD is up to date, rebase forced.")"
+ else
+ say "$(eval_gettext "Current branch \$branch_name is up to date, rebase forced.")"
+ fi
+ 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
+ if test -z "$mb"
+ then
+ echo "$(eval_gettext "Changes to \$onto:")"
+ else
+ echo "$(eval_gettext "Changes from \$mb to \$onto:")"
+ fi
+ fi
+ mb_tree="${mb:-$(git hash-object -t tree /dev/null)}"
+ # We want color (if set), but no pager
+ GIT_PAGER='' git diff --stat --summary "$mb_tree" "$onto"
+fi
+
+test -n "$interactive_rebase" && run_specific_rebase
+
+# Detach HEAD and reset the tree
+say "$(gettext "First, rewinding head to replay your work on top of it...")"
+
+GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: checkout $onto_name" \
+ git checkout -q "$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
+ finish_rebase
+ exit 0
+fi
+
+if test -n "$rebase_root"
+then
+ revisions="$onto..$orig_head"
+else
+ revisions="${restrict_revision-$upstream}..$orig_head"
+fi
+
+run_specific_rebase