mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
![Johannes Sixt](/assets/img/avatar_default.png)
If the upstream argument to rebase (the first argument) was relative to
HEAD and the name of the branch to rebase (the second argument) was given,
the upstream would have been interpreted relative to the second argument.
In particular, this command
git rebase -i HEAD topic
would always finish with "Nothing to do". (a1bf91e
fixed the same issue
for non-interactive rebase.)
Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
557 lines
13 KiB
Bash
Executable file
557 lines
13 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2006 Johannes E. Schindelin
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# SHORT DESCRIPTION
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#
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# This script makes it easy to fix up commits in the middle of a series,
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# and rearrange commits.
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#
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# The original idea comes from Eric W. Biederman, in
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# http://article.gmane.org/gmane.comp.version-control.git/22407
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USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose]
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[--onto <branch>] <upstream> [<branch>])'
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OPTIONS_SPEC=
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. git-sh-setup
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require_work_tree
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DOTEST="$GIT_DIR/.dotest-merge"
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TODO="$DOTEST"/git-rebase-todo
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DONE="$DOTEST"/done
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MSG="$DOTEST"/message
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SQUASH_MSG="$DOTEST"/message-squash
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REWRITTEN="$DOTEST"/rewritten
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PRESERVE_MERGES=
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STRATEGY=
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VERBOSE=
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test -d "$REWRITTEN" && PRESERVE_MERGES=t
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test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
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test -f "$DOTEST"/verbose && VERBOSE=t
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GIT_CHERRY_PICK_HELP=" After resolving the conflicts,
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mark the corrected paths with 'git add <paths>', and
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run 'git rebase --continue'"
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export GIT_CHERRY_PICK_HELP
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warn () {
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echo "$*" >&2
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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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require_clean_work_tree () {
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# test if working tree is dirty
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git rev-parse --verify HEAD > /dev/null &&
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git update-index --ignore-submodules --refresh &&
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git diff-files --quiet --ignore-submodules &&
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git diff-index --cached --quiet HEAD --ignore-submodules -- ||
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die "Working tree is dirty"
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}
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ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION"
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comment_for_reflog () {
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case "$ORIG_REFLOG_ACTION" in
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''|rebase*)
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GIT_REFLOG_ACTION="rebase -i ($1)"
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export GIT_REFLOG_ACTION
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;;
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esac
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}
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last_count=
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mark_action_done () {
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sed -e 1q < "$TODO" >> "$DONE"
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sed -e 1d < "$TODO" >> "$TODO".new
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mv -f "$TODO".new "$TODO"
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count=$(grep -c '^[^#]' < "$DONE")
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total=$(($count+$(grep -c '^[^#]' < "$TODO")))
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if test "$last_count" != "$count"
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then
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last_count=$count
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printf "Rebasing (%d/%d)\r" $count $total
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test -z "$VERBOSE" || echo
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fi
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}
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make_patch () {
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parent_sha1=$(git rev-parse --verify "$1"^) ||
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die "Cannot get patch for $1^"
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git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
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test -f "$DOTEST"/message ||
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git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
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test -f "$DOTEST"/author-script ||
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get_author_ident_from_commit "$1" > "$DOTEST"/author-script
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}
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die_with_patch () {
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make_patch "$1"
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git rerere
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die "$2"
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}
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die_abort () {
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rm -rf "$DOTEST"
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die "$1"
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}
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has_action () {
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grep '^[^#]' "$1" >/dev/null
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}
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pick_one () {
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no_ff=
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case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac
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output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
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test -d "$REWRITTEN" &&
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pick_one_preserving_merges "$@" && return
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parent_sha1=$(git rev-parse --verify $sha1^) ||
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die "Could not get the parent of $sha1"
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current_sha1=$(git rev-parse --verify HEAD)
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if test "$no_ff$current_sha1" = "$parent_sha1"; then
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output git reset --hard $sha1
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test "a$1" = a-n && output git reset --soft $current_sha1
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sha1=$(git rev-parse --short $sha1)
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output warn Fast forward to $sha1
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else
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output git cherry-pick "$@"
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fi
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}
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pick_one_preserving_merges () {
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case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
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sha1=$(git rev-parse $sha1)
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if test -f "$DOTEST"/current-commit
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then
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
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rm "$DOTEST"/current-commit ||
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die "Cannot write current commit's replacement sha1"
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fi
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# rewrite parents; if none were rewritten, we can fast-forward.
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fast_forward=t
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preserve=t
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new_parents=
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for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
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do
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if test -f "$REWRITTEN"/$p
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then
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preserve=f
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new_p=$(cat "$REWRITTEN"/$p)
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test $p != $new_p && fast_forward=f
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case "$new_parents" in
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*$new_p*)
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;; # do nothing; that parent is already there
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*)
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new_parents="$new_parents $new_p"
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;;
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esac
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fi
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done
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case $fast_forward in
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t)
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output warn "Fast forward to $sha1"
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test $preserve = f || echo $sha1 > "$REWRITTEN"/$sha1
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;;
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f)
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test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
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first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
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# detach HEAD to current parent
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output git checkout $first_parent 2> /dev/null ||
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die "Cannot move HEAD to $first_parent"
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echo $sha1 > "$DOTEST"/current-commit
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case "$new_parents" in
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' '*' '*)
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# redo merge
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author_script=$(get_author_ident_from_commit $sha1)
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eval "$author_script"
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msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')"
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# No point in merging the first parent, that's HEAD
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new_parents=${new_parents# $first_parent}
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if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
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GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
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GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
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output git merge $STRATEGY -m "$msg" \
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$new_parents
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then
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git rerere
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printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
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die Error redoing merge $sha1
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fi
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;;
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*)
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output git cherry-pick "$@" ||
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die_with_patch $sha1 "Could not pick $sha1"
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;;
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esac
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;;
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esac
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}
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nth_string () {
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case "$1" in
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*1[0-9]|*[04-9]) echo "$1"th;;
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*1) echo "$1"st;;
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*2) echo "$1"nd;;
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*3) echo "$1"rd;;
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esac
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}
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make_squash_message () {
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if test -f "$SQUASH_MSG"; then
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COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
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< "$SQUASH_MSG" | sed -ne '$p')+1))
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echo "# This is a combination of $COUNT commits."
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sed -e 1d -e '2,/^./{
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/^$/d
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}' <"$SQUASH_MSG"
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else
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COUNT=2
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echo "# This is a combination of two commits."
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echo "# The first commit's message is:"
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echo
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git cat-file commit HEAD | sed -e '1,/^$/d'
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fi
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echo
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echo "# This is the $(nth_string $COUNT) commit message:"
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echo
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git cat-file commit $1 | sed -e '1,/^$/d'
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}
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peek_next_command () {
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sed -n "1s/ .*$//p" < "$TODO"
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}
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do_next () {
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rm -f "$DOTEST"/message "$DOTEST"/author-script \
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"$DOTEST"/amend || exit
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read command sha1 rest < "$TODO"
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case "$command" in
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'#'*|'')
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mark_action_done
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;;
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pick|p)
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comment_for_reflog pick
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mark_action_done
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pick_one $sha1 ||
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die_with_patch $sha1 "Could not apply $sha1... $rest"
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;;
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edit|e)
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comment_for_reflog edit
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mark_action_done
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pick_one $sha1 ||
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die_with_patch $sha1 "Could not apply $sha1... $rest"
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make_patch $sha1
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: > "$DOTEST"/amend
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warn
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warn "You can amend the commit now, with"
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warn
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warn " git commit --amend"
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warn
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warn "Once you are satisfied with your changes, run"
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warn
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warn " git rebase --continue"
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warn
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exit 0
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;;
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squash|s)
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comment_for_reflog squash
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has_action "$DONE" ||
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die "Cannot 'squash' without a previous commit"
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mark_action_done
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make_squash_message $sha1 > "$MSG"
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case "$(peek_next_command)" in
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squash|s)
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EDIT_COMMIT=
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USE_OUTPUT=output
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cp "$MSG" "$SQUASH_MSG"
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;;
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*)
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EDIT_COMMIT=-e
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USE_OUTPUT=
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rm -f "$SQUASH_MSG" || exit
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;;
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esac
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failed=f
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author_script=$(get_author_ident_from_commit HEAD)
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output git reset --soft HEAD^
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pick_one -n $sha1 || failed=t
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echo "$author_script" > "$DOTEST"/author-script
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if test $failed = f
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then
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# This is like --amend, but with a different message
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eval "$author_script"
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GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
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GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
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GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
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$USE_OUTPUT git commit --no-verify -F "$MSG" $EDIT_COMMIT || failed=t
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fi
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if test $failed = t
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then
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cp "$MSG" "$GIT_DIR"/MERGE_MSG
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warn
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warn "Could not apply $sha1... $rest"
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die_with_patch $sha1 ""
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fi
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;;
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*)
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warn "Unknown command: $command $sha1 $rest"
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die_with_patch $sha1 "Please fix this in the file $TODO."
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;;
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esac
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test -s "$TODO" && return
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comment_for_reflog finish &&
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HEADNAME=$(cat "$DOTEST"/head-name) &&
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OLDHEAD=$(cat "$DOTEST"/head) &&
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SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
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if test -d "$REWRITTEN"
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then
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test -f "$DOTEST"/current-commit &&
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current_commit=$(cat "$DOTEST"/current-commit) &&
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git rev-parse HEAD > "$REWRITTEN"/$current_commit
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if test -f "$REWRITTEN"/$OLDHEAD
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then
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NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
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else
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NEWHEAD=$OLDHEAD
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fi
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else
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NEWHEAD=$(git rev-parse HEAD)
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fi &&
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case $HEADNAME in
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refs/*)
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message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
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git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
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git symbolic-ref HEAD $HEADNAME
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;;
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esac && {
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test ! -f "$DOTEST"/verbose ||
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git diff-tree --stat $(cat "$DOTEST"/head)..HEAD
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} &&
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rm -rf "$DOTEST" &&
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git gc --auto &&
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warn "Successfully rebased and updated $HEADNAME."
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exit
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}
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do_rest () {
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while :
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do
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do_next
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done
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}
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while test $# != 0
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do
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case "$1" in
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--continue)
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comment_for_reflog continue
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test -d "$DOTEST" || die "No interactive rebase running"
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# Sanity check
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git rev-parse --verify HEAD >/dev/null ||
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die "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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die "Working tree is dirty"
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# do we have anything to commit?
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if git diff-index --cached --quiet --ignore-submodules HEAD --
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then
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: Nothing to commit -- skip this
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else
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. "$DOTEST"/author-script ||
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die "Cannot find the author identity"
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if test -f "$DOTEST"/amend
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then
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git reset --soft HEAD^ ||
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die "Cannot rewind the HEAD"
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fi
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export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE &&
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git commit --no-verify -F "$DOTEST"/message -e ||
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die "Could not commit staged changes."
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fi
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require_clean_work_tree
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do_rest
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;;
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--abort)
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comment_for_reflog abort
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git rerere clear
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test -d "$DOTEST" || die "No interactive rebase running"
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HEADNAME=$(cat "$DOTEST"/head-name)
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HEAD=$(cat "$DOTEST"/head)
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case $HEADNAME in
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refs/*)
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git symbolic-ref HEAD $HEADNAME
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;;
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esac &&
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output git reset --hard $HEAD &&
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rm -rf "$DOTEST"
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exit
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;;
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--skip)
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comment_for_reflog skip
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git rerere clear
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test -d "$DOTEST" || die "No interactive rebase running"
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output git reset --hard && do_rest
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;;
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-s|--strategy)
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case "$#,$1" in
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*,*=*)
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STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
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1,*)
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usage ;;
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*)
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STRATEGY="-s $2"
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shift ;;
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esac
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;;
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-m|--merge)
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# we use merge anyway
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;;
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-C*)
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die "Interactive rebase uses merge, so $1 does not make sense"
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;;
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-v|--verbose)
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VERBOSE=t
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;;
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-p|--preserve-merges)
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PRESERVE_MERGES=t
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;;
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-i|--interactive)
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# yeah, we know
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;;
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''|-h)
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usage
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;;
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*)
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test -d "$DOTEST" &&
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die "Interactive rebase already started"
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git var GIT_COMMITTER_IDENT >/dev/null ||
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die "You need to set your committer info first"
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comment_for_reflog start
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ONTO=
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case "$1" in
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--onto)
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ONTO=$(git rev-parse --verify "$2") ||
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die "Does not point to a valid commit: $2"
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shift; shift
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;;
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esac
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require_clean_work_tree
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UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
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test -z "$ONTO" && ONTO=$UPSTREAM
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if test ! -z "$2"
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then
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output git show-ref --verify --quiet "refs/heads/$2" ||
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die "Invalid branchname: $2"
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output git checkout "$2" ||
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die "Could not checkout $2"
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fi
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HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?"
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mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
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: > "$DOTEST"/interactive || die "Could not mark as interactive"
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git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null ||
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echo "detached HEAD" > "$DOTEST"/head-name
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echo $HEAD > "$DOTEST"/head
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echo $UPSTREAM > "$DOTEST"/upstream
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echo $ONTO > "$DOTEST"/onto
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test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
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test t = "$VERBOSE" && : > "$DOTEST"/verbose
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if test t = "$PRESERVE_MERGES"
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then
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# $REWRITTEN contains files for each commit that is
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# reachable by at least one merge base of $HEAD and
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# $UPSTREAM. They are not necessarily rewritten, but
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# their children might be.
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# This ensures that commits on merged, but otherwise
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# unrelated side branches are left alone. (Think "X"
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# in the man page's example.)
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mkdir "$REWRITTEN" &&
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for c in $(git merge-base --all $HEAD $UPSTREAM)
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do
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echo $ONTO > "$REWRITTEN"/$c ||
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die "Could not init rewritten commits"
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done
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MERGES_OPTION=
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else
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MERGES_OPTION=--no-merges
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fi
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SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
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SHORTHEAD=$(git rev-parse --short $HEAD)
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|
SHORTONTO=$(git rev-parse --short $ONTO)
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|
git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
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|
--abbrev=7 --reverse --left-right --cherry-pick \
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|
$UPSTREAM...$HEAD | \
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|
sed -n "s/^>/pick /p" > "$TODO"
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|
cat >> "$TODO" << EOF
|
|
|
|
# Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
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|
#
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|
# Commands:
|
|
# pick = use commit
|
|
# edit = use commit, but stop for amending
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|
# squash = use commit, but meld into previous commit
|
|
#
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|
# If you remove a line here THAT COMMIT WILL BE LOST.
|
|
# However, if you remove everything, the rebase will be aborted.
|
|
#
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|
EOF
|
|
|
|
has_action "$TODO" ||
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|
die_abort "Nothing to do"
|
|
|
|
cp "$TODO" "$TODO".backup
|
|
git_editor "$TODO" ||
|
|
die "Could not execute editor"
|
|
|
|
has_action "$TODO" ||
|
|
die_abort "Nothing to do"
|
|
|
|
output git checkout $ONTO && do_rest
|
|
;;
|
|
esac
|
|
shift
|
|
done
|