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https://github.com/git/git
synced 2024-08-24 18:26:02 +00:00
![Kaartic Sivaraam](/assets/img/avatar_default.png)
Attempting to rebase when the HEAD is detached and is already up to date with upstream (so there's nothing to do), the following message is shown Current branch HEAD is up to date. which is clearly wrong as HEAD is not a branch. Handle the special case of HEAD correctly to give a more precise error message. Signed-off-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
664 lines
16 KiB
Bash
Executable file
664 lines
16 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano.
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#
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SUBDIRECTORY_OK=Yes
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OPTIONS_KEEPDASHDASH=
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OPTIONS_STUCKLONG=t
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OPTIONS_SPEC="\
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git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] [<upstream>] [<branch>]
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git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] --root [<branch>]
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git rebase --continue | --abort | --skip | --edit-todo
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--
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Available options are
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v,verbose! display a diffstat of what changed upstream
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q,quiet! be quiet. implies --no-stat
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autostash automatically stash/stash pop before and after
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fork-point use 'merge-base --fork-point' to refine upstream
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onto=! rebase onto given branch instead of upstream
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p,preserve-merges! try to recreate merges instead of ignoring them
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s,strategy=! use the given merge strategy
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no-ff! cherry-pick all commits, even if unchanged
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m,merge! use merging strategies to rebase
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i,interactive! let the user edit the list of commits to rebase
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x,exec=! add exec lines after each commit of the editable list
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k,keep-empty preserve empty commits during rebase
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f,force-rebase! force rebase even if branch is up to date
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X,strategy-option=! pass the argument through to the merge strategy
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stat! display a diffstat of what changed upstream
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n,no-stat! do not show diffstat of what changed upstream
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verify allow pre-rebase hook to run
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rerere-autoupdate allow rerere to update index with resolved conflicts
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root! rebase all reachable commits up to the root(s)
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autosquash move commits that begin with squash!/fixup! under -i
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committer-date-is-author-date! passed to 'git am'
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ignore-date! passed to 'git am'
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signoff passed to 'git am'
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whitespace=! passed to 'git apply'
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ignore-whitespace! passed to 'git apply'
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C=! passed to 'git apply'
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S,gpg-sign? GPG-sign commits
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Actions:
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continue! continue
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abort! abort and check out the original branch
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skip! skip current patch and continue
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edit-todo! edit the todo list during an interactive rebase
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quit! abort but keep HEAD where it is
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"
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. git-sh-setup
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set_reflog_action rebase
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require_work_tree_exists
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cd_to_toplevel
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LF='
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'
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ok_to_skip_pre_rebase=
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resolvemsg="
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$(gettext 'Resolve all conflicts manually, mark them as resolved with
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"git add/rm <conflicted_files>", then run "git rebase --continue".
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You can instead skip this commit: run "git rebase --skip".
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To abort and get back to the state before "git rebase", run "git rebase --abort".')
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"
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unset onto
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unset restrict_revision
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cmd=
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strategy=
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strategy_opts=
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do_merge=
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merge_dir="$GIT_DIR"/rebase-merge
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apply_dir="$GIT_DIR"/rebase-apply
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verbose=
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diffstat=
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test "$(git config --bool rebase.stat)" = true && diffstat=t
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autostash="$(git config --bool rebase.autostash || echo false)"
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fork_point=auto
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git_am_opt=
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git_format_patch_opt=
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rebase_root=
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force_rebase=
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allow_rerere_autoupdate=
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# Non-empty if a rebase was in progress when 'git rebase' was invoked
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in_progress=
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# One of {am, merge, interactive}
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type=
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# One of {"$GIT_DIR"/rebase-apply, "$GIT_DIR"/rebase-merge}
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state_dir=
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# One of {'', continue, skip, abort}, as parsed from command line
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action=
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preserve_merges=
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autosquash=
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keep_empty=
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test "$(git config --bool rebase.autosquash)" = "true" && autosquash=t
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case "$(git config --bool commit.gpgsign)" in
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true) gpg_sign_opt=-S ;;
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*) gpg_sign_opt= ;;
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esac
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read_basic_state () {
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test -f "$state_dir/head-name" &&
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test -f "$state_dir/onto" &&
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head_name=$(cat "$state_dir"/head-name) &&
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onto=$(cat "$state_dir"/onto) &&
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# We always write to orig-head, but interactive rebase used to write to
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# head. Fall back to reading from head to cover for the case that the
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# user upgraded git with an ongoing interactive rebase.
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if test -f "$state_dir"/orig-head
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then
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orig_head=$(cat "$state_dir"/orig-head)
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else
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orig_head=$(cat "$state_dir"/head)
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fi &&
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GIT_QUIET=$(cat "$state_dir"/quiet) &&
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test -f "$state_dir"/verbose && verbose=t
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test -f "$state_dir"/strategy && strategy="$(cat "$state_dir"/strategy)"
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test -f "$state_dir"/strategy_opts &&
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strategy_opts="$(cat "$state_dir"/strategy_opts)"
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test -f "$state_dir"/allow_rerere_autoupdate &&
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allow_rerere_autoupdate="$(cat "$state_dir"/allow_rerere_autoupdate)"
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test -f "$state_dir"/gpg_sign_opt &&
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gpg_sign_opt="$(cat "$state_dir"/gpg_sign_opt)"
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}
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write_basic_state () {
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echo "$head_name" > "$state_dir"/head-name &&
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echo "$onto" > "$state_dir"/onto &&
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echo "$orig_head" > "$state_dir"/orig-head &&
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echo "$GIT_QUIET" > "$state_dir"/quiet &&
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test t = "$verbose" && : > "$state_dir"/verbose
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test -n "$strategy" && echo "$strategy" > "$state_dir"/strategy
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test -n "$strategy_opts" && echo "$strategy_opts" > \
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"$state_dir"/strategy_opts
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test -n "$allow_rerere_autoupdate" && echo "$allow_rerere_autoupdate" > \
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"$state_dir"/allow_rerere_autoupdate
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test -n "$gpg_sign_opt" && echo "$gpg_sign_opt" > "$state_dir"/gpg_sign_opt
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}
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output () {
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case "$verbose" in
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'')
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output=$("$@" 2>&1 )
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status=$?
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test $status != 0 && printf "%s\n" "$output"
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return $status
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;;
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*)
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"$@"
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;;
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esac
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}
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move_to_original_branch () {
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case "$head_name" in
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refs/*)
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message="rebase finished: $head_name onto $onto"
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git update-ref -m "$message" \
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$head_name $(git rev-parse HEAD) $orig_head &&
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git symbolic-ref \
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-m "rebase finished: returning to $head_name" \
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HEAD $head_name ||
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die "$(eval_gettext "Could not move back to \$head_name")"
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;;
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esac
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}
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apply_autostash () {
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if test -f "$state_dir/autostash"
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then
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stash_sha1=$(cat "$state_dir/autostash")
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if git stash apply $stash_sha1 >/dev/null 2>&1
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then
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echo "$(gettext 'Applied autostash.')" >&2
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else
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git stash store -m "autostash" -q $stash_sha1 ||
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die "$(eval_gettext "Cannot store \$stash_sha1")"
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gettext 'Applying autostash resulted in conflicts.
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Your changes are safe in the stash.
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You can run "git stash pop" or "git stash drop" at any time.
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' >&2
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fi
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fi
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}
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finish_rebase () {
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apply_autostash &&
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{ git gc --auto || true; } &&
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rm -rf "$state_dir"
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}
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run_specific_rebase () {
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if [ "$interactive_rebase" = implied ]; then
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GIT_EDITOR=:
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export GIT_EDITOR
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autosquash=
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fi
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. git-rebase--$type
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ret=$?
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if test $ret -eq 0
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then
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finish_rebase
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elif test $ret -eq 2 # special exit status for rebase -i
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then
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apply_autostash &&
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rm -rf "$state_dir" &&
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die "Nothing to do"
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fi
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exit $ret
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}
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run_pre_rebase_hook () {
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if test -z "$ok_to_skip_pre_rebase" &&
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test -x "$(git rev-parse --git-path hooks/pre-rebase)"
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then
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"$(git rev-parse --git-path hooks/pre-rebase)" ${1+"$@"} ||
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die "$(gettext "The pre-rebase hook refused to rebase.")"
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fi
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}
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test -f "$apply_dir"/applying &&
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die "$(gettext "It looks like 'git am' is in progress. Cannot rebase.")"
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if test -d "$apply_dir"
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then
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type=am
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state_dir="$apply_dir"
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elif test -d "$merge_dir"
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then
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if test -f "$merge_dir"/interactive
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then
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type=interactive
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interactive_rebase=explicit
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else
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type=merge
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fi
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state_dir="$merge_dir"
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fi
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test -n "$type" && in_progress=t
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total_argc=$#
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while test $# != 0
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do
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case "$1" in
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--no-verify)
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ok_to_skip_pre_rebase=yes
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;;
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--verify)
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ok_to_skip_pre_rebase=
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;;
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--continue|--skip|--abort|--quit|--edit-todo)
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test $total_argc -eq 2 || usage
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action=${1##--}
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;;
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--onto=*)
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onto="${1#--onto=}"
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;;
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--exec=*)
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cmd="${cmd}exec ${1#--exec=}${LF}"
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test -z "$interactive_rebase" && interactive_rebase=implied
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;;
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--interactive)
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interactive_rebase=explicit
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;;
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--keep-empty)
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keep_empty=yes
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;;
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--preserve-merges)
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preserve_merges=t
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test -z "$interactive_rebase" && interactive_rebase=implied
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;;
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--autosquash)
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autosquash=t
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;;
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--no-autosquash)
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autosquash=
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;;
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--fork-point)
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fork_point=t
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;;
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--no-fork-point)
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fork_point=
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;;
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--merge)
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do_merge=t
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;;
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--strategy-option=*)
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strategy_opts="$strategy_opts $(git rev-parse --sq-quote "--${1#--strategy-option=}")"
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do_merge=t
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test -z "$strategy" && strategy=recursive
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;;
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--strategy=*)
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strategy="${1#--strategy=}"
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do_merge=t
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;;
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--no-stat)
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diffstat=
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;;
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--stat)
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diffstat=t
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;;
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--autostash)
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autostash=true
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;;
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--no-autostash)
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autostash=false
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;;
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--verbose)
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verbose=t
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diffstat=t
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GIT_QUIET=
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;;
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--quiet)
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GIT_QUIET=t
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git_am_opt="$git_am_opt -q"
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verbose=
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diffstat=
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;;
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--whitespace=*)
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git_am_opt="$git_am_opt --whitespace=${1#--whitespace=}"
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case "${1#--whitespace=}" in
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fix|strip)
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force_rebase=t
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;;
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esac
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;;
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--ignore-whitespace)
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git_am_opt="$git_am_opt $1"
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;;
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--committer-date-is-author-date|--ignore-date|--signoff|--no-signoff)
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git_am_opt="$git_am_opt $1"
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force_rebase=t
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;;
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-C*)
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git_am_opt="$git_am_opt $1"
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;;
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--root)
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rebase_root=t
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;;
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--force-rebase|--no-ff)
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force_rebase=t
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;;
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--rerere-autoupdate|--no-rerere-autoupdate)
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allow_rerere_autoupdate="$1"
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;;
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--gpg-sign)
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gpg_sign_opt=-S
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;;
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--gpg-sign=*)
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gpg_sign_opt="-S${1#--gpg-sign=}"
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;;
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--)
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shift
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break
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;;
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*)
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usage
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;;
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esac
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shift
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done
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test $# -gt 2 && usage
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if test -n "$action"
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then
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test -z "$in_progress" && die "$(gettext "No rebase in progress?")"
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# Only interactive rebase uses detailed reflog messages
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if test "$type" = interactive && test "$GIT_REFLOG_ACTION" = rebase
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then
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GIT_REFLOG_ACTION="rebase -i ($action)"
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export GIT_REFLOG_ACTION
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fi
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fi
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if test "$action" = "edit-todo" && test "$type" != "interactive"
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then
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die "$(gettext "The --edit-todo action can only be used during interactive rebase.")"
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fi
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case "$action" in
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continue)
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# Sanity check
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git rev-parse --verify HEAD >/dev/null ||
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die "$(gettext "Cannot read HEAD")"
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git update-index --ignore-submodules --refresh &&
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git diff-files --quiet --ignore-submodules || {
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echo "$(gettext "You must edit all merge conflicts and then
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mark them as resolved using git add")"
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exit 1
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}
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read_basic_state
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run_specific_rebase
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;;
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skip)
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output git reset --hard HEAD || exit $?
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read_basic_state
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run_specific_rebase
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;;
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abort)
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git rerere clear
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read_basic_state
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case "$head_name" in
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refs/*)
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git symbolic-ref -m "rebase: aborting" HEAD $head_name ||
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die "$(eval_gettext "Could not move back to \$head_name")"
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;;
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esac
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output git reset --hard $orig_head
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finish_rebase
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exit
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;;
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quit)
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exec rm -rf "$state_dir"
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;;
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edit-todo)
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run_specific_rebase
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;;
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esac
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# Make sure no rebase is in progress
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if test -n "$in_progress"
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then
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state_dir_base=${state_dir##*/}
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cmd_live_rebase="git rebase (--continue | --abort | --skip)"
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cmd_clear_stale_rebase="rm -fr \"$state_dir\""
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die "
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$(eval_gettext 'It seems that there is already a $state_dir_base directory, and
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I wonder if you are in the middle of another rebase. If that is the
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case, please try
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$cmd_live_rebase
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If that is not the case, please
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$cmd_clear_stale_rebase
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and run me again. I am stopping in case you still have something
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valuable there.')"
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fi
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if test -n "$rebase_root" && test -z "$onto"
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then
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test -z "$interactive_rebase" && interactive_rebase=implied
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fi
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if test -n "$interactive_rebase"
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then
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type=interactive
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state_dir="$merge_dir"
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elif test -n "$do_merge"
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then
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type=merge
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state_dir="$merge_dir"
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else
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type=am
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state_dir="$apply_dir"
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fi
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if test -t 2 && test -z "$GIT_QUIET"
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then
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git_format_patch_opt="$git_format_patch_opt --progress"
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fi
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|
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if test -z "$rebase_root"
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then
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case "$#" in
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0)
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if ! upstream_name=$(git rev-parse --symbolic-full-name \
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--verify -q @{upstream} 2>/dev/null)
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then
|
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. git-parse-remote
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error_on_missing_default_upstream "rebase" "rebase" \
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"against" "git rebase $(gettext '<branch>')"
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fi
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test "$fork_point" = auto && fork_point=t
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;;
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*) upstream_name="$1"
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if test "$upstream_name" = "-"
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then
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upstream_name="@{-1}"
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fi
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shift
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;;
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esac
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upstream=$(peel_committish "${upstream_name}") ||
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die "$(eval_gettext "invalid upstream '\$upstream_name'")"
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upstream_arg="$upstream_name"
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else
|
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if test -z "$onto"
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then
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empty_tree=$(git hash-object -t tree /dev/null)
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onto=$(git commit-tree $empty_tree </dev/null)
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squash_onto="$onto"
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fi
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unset upstream_name
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unset upstream
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test $# -gt 1 && usage
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upstream_arg=--root
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fi
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# Make sure the branch to rebase onto is valid.
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onto_name=${onto-"$upstream_name"}
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case "$onto_name" in
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*...*)
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if left=${onto_name%...*} right=${onto_name#*...} &&
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onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
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then
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case "$onto" in
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?*"$LF"?*)
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die "$(eval_gettext "\$onto_name: there are more than one merge bases")"
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;;
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'')
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die "$(eval_gettext "\$onto_name: there is no merge base")"
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;;
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esac
|
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else
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die "$(eval_gettext "\$onto_name: there is no merge base")"
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fi
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;;
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*)
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|
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 "$type" != interactive && test "$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
|
|
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 "$(gettext "First, rewinding head to replay your work on top of it...")"
|
|
|
|
GIT_REFLOG_ACTION="$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
|