USAGE='(--continue | --abort | --skip | [--preserve-merges] [--verbose]
[--onto <branch>] <upstream> [<branch>])'
+OPTIONS_SPEC=
. git-sh-setup
require_work_tree
DOTEST="$GIT_DIR/.dotest-merge"
-TODO="$DOTEST"/todo
+TODO="$DOTEST"/git-rebase-todo
DONE="$DOTEST"/done
+MSG="$DOTEST"/message
+SQUASH_MSG="$DOTEST"/message-squash
REWRITTEN="$DOTEST"/rewritten
PRESERVE_MERGES=
STRATEGY=
VERBOSE=
+test -d "$REWRITTEN" && PRESERVE_MERGES=t
+test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
+test -f "$DOTEST"/verbose && VERBOSE=t
+
+GIT_CHERRY_PICK_HELP=" After resolving the conflicts,
+mark the corrected paths with 'git add <paths>', and
+run 'git rebase --continue'"
+export GIT_CHERRY_PICK_HELP
warn () {
echo "$*" >&2
}
+output () {
+ case "$VERBOSE" in
+ '')
+ output=$("$@" 2>&1 )
+ status=$?
+ test $status != 0 && printf "%s\n" "$output"
+ return $status
+ ;;
+ *)
+ "$@"
+ ;;
+ esac
+}
+
require_clean_work_tree () {
# test if working tree is dirty
git rev-parse --verify HEAD > /dev/null &&
git update-index --refresh &&
git diff-files --quiet &&
- git diff-index --cached --quiet HEAD ||
+ git diff-index --cached --quiet HEAD -- ||
die "Working tree is dirty"
}
''|rebase*)
GIT_REFLOG_ACTION="rebase -i ($1)"
export GIT_REFLOG_ACTION
+ ;;
esac
}
+last_count=
mark_action_done () {
sed -e 1q < "$TODO" >> "$DONE"
sed -e 1d < "$TODO" >> "$TODO".new
mv -f "$TODO".new "$TODO"
+ count=$(($(grep -ve '^$' -e '^#' < "$DONE" | wc -l)))
+ total=$(($count+$(grep -ve '^$' -e '^#' < "$TODO" | wc -l)))
+ if test "$last_count" != "$count"
+ then
+ last_count=$count
+ printf "Rebasing (%d/%d)\r" $count $total
+ test -z "$VERBOSE" || echo
+ fi
}
make_patch () {
- parent_sha1=$(git rev-parse --verify "$1"^ 2> /dev/null)
- git diff "$parent_sha1".."$1" > "$DOTEST"/patch
+ parent_sha1=$(git rev-parse --verify "$1"^) ||
+ die "Cannot get patch for $1^"
+ git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
+ test -f "$DOTEST"/message ||
+ git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
+ test -f "$DOTEST"/author-script ||
+ get_author_ident_from_commit "$1" > "$DOTEST"/author-script
}
die_with_patch () {
make_patch "$1"
+ git rerere
die "$2"
}
die "$1"
}
+has_action () {
+ grep -vqe '^$' -e '^#' "$1"
+}
+
pick_one () {
- case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
- git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
+ no_ff=
+ case "$1" in -n) sha1=$2; no_ff=t ;; *) sha1=$1 ;; esac
+ output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
test -d "$REWRITTEN" &&
pick_one_preserving_merges "$@" && return
- parent_sha1=$(git rev-parse --verify $sha1^ 2>/dev/null)
+ parent_sha1=$(git rev-parse --verify $sha1^) ||
+ die "Could not get the parent of $sha1"
current_sha1=$(git rev-parse --verify HEAD)
- if [ $current_sha1 = $parent_sha1 ]; then
- git reset --hard $sha1
+ if test "$no_ff$current_sha1" = "$parent_sha1"; then
+ output git reset --hard $sha1
+ test "a$1" = a-n && output git reset --soft $current_sha1
sha1=$(git rev-parse --short $sha1)
- warn Fast forward to $sha1
+ output warn Fast forward to $sha1
else
- git cherry-pick $STRATEGY "$@"
+ output git cherry-pick "$@"
fi
}
case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
sha1=$(git rev-parse $sha1)
- if [ -f "$DOTEST"/current-commit ]
+ if test -f "$DOTEST"/current-commit
then
current_commit=$(cat "$DOTEST"/current-commit) &&
git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
fast_forward=t
preserve=t
new_parents=
- for p in $(git rev-list --parents -1 $sha1 | cut -d\ -f2-)
+ for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
do
- if [ -f "$REWRITTEN"/$p ]
+ if test -f "$REWRITTEN"/$p
then
preserve=f
new_p=$(cat "$REWRITTEN"/$p)
;; # do nothing; that parent is already there
*)
new_parents="$new_parents $new_p"
+ ;;
esac
fi
done
case $fast_forward in
t)
- echo "Fast forward to $sha1"
- test $preserve=f && echo $sha1 > "$REWRITTEN"/$sha1
+ output warn "Fast forward to $sha1"
+ test $preserve = f || echo $sha1 > "$REWRITTEN"/$sha1
;;
f)
test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
- first_parent=$(expr "$new_parents" : " \([^ ]*\)")
+ first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
# detach HEAD to current parent
- git checkout $first_parent 2> /dev/null ||
+ output git checkout $first_parent 2> /dev/null ||
die "Cannot move HEAD to $first_parent"
echo $sha1 > "$DOTEST"/current-commit
case "$new_parents" in
- \ *\ *)
+ ' '*' '*)
# redo merge
author_script=$(get_author_ident_from_commit $sha1)
eval "$author_script"
- msg="$(git cat-file commit $sha1 | \
- sed -e '1,/^$/d' -e "s/[\"\\]/\\\\&/g")"
- # NEEDSWORK: give rerere a chance
- if ! git merge $STRATEGY -m "$msg" $new_parents
+ msg="$(git cat-file commit $sha1 | sed -e '1,/^$/d')"
+ # No point in merging the first parent, that's HEAD
+ new_parents=${new_parents# $first_parent}
+ if ! GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
+ GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
+ GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
+ output git merge $STRATEGY -m "$msg" \
+ $new_parents
then
- echo "$msg" > "$GIT_DIR"/MERGE_MSG
- warn Error redoing merge $sha1
- warn
- warn After fixup, please use
- die "$author_script git commit"
+ git rerere
+ printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
+ die Error redoing merge $sha1
fi
;;
*)
- git cherry-pick $STRATEGY "$@" ||
+ output git cherry-pick "$@" ||
die_with_patch $sha1 "Could not pick $sha1"
+ ;;
esac
+ ;;
esac
}
+nth_string () {
+ case "$1" in
+ *1[0-9]|*[04-9]) echo "$1"th;;
+ *1) echo "$1"st;;
+ *2) echo "$1"nd;;
+ *3) echo "$1"rd;;
+ esac
+}
+
+make_squash_message () {
+ if test -f "$SQUASH_MSG"; then
+ COUNT=$(($(sed -n "s/^# This is [^0-9]*\([1-9][0-9]*\).*/\1/p" \
+ < "$SQUASH_MSG" | tail -n 1)+1))
+ echo "# This is a combination of $COUNT commits."
+ sed -e 1d -e '2,/^./{
+ /^$/d
+ }' <"$SQUASH_MSG"
+ else
+ COUNT=2
+ echo "# This is a combination of two commits."
+ echo "# The first commit's message is:"
+ echo
+ git cat-file commit HEAD | sed -e '1,/^$/d'
+ fi
+ echo
+ echo "# This is the $(nth_string $COUNT) commit message:"
+ echo
+ git cat-file commit $1 | sed -e '1,/^$/d'
+}
+
+peek_next_command () {
+ sed -n "1s/ .*$//p" < "$TODO"
+}
+
do_next () {
+ rm -f "$DOTEST"/message "$DOTEST"/author-script \
+ "$DOTEST"/amend || exit
read command sha1 rest < "$TODO"
case "$command" in
- \#|'')
+ '#'*|'')
mark_action_done
- continue
;;
- pick)
+ pick|p)
comment_for_reflog pick
mark_action_done
pick_one $sha1 ||
die_with_patch $sha1 "Could not apply $sha1... $rest"
;;
- edit)
+ edit|e)
comment_for_reflog edit
mark_action_done
pick_one $sha1 ||
die_with_patch $sha1 "Could not apply $sha1... $rest"
make_patch $sha1
+ : > "$DOTEST"/amend
warn
warn "You can amend the commit now, with"
warn
warn
exit 0
;;
- squash)
+ squash|s)
comment_for_reflog squash
- test -z "$(grep -ve '^$' -e '^#' < $DONE)" &&
+ has_action "$DONE" ||
die "Cannot 'squash' without a previous commit"
mark_action_done
+ make_squash_message $sha1 > "$MSG"
+ case "$(peek_next_command)" in
+ squash|s)
+ EDIT_COMMIT=
+ USE_OUTPUT=output
+ cp "$MSG" "$SQUASH_MSG"
+ ;;
+ *)
+ EDIT_COMMIT=-e
+ USE_OUTPUT=
+ rm -f "$SQUASH_MSG" || exit
+ ;;
+ esac
+
failed=f
+ author_script=$(get_author_ident_from_commit HEAD)
+ output git reset --soft HEAD^
pick_one -n $sha1 || failed=t
- MSG="$DOTEST"/message
- echo "# This is a combination of two commits." > "$MSG"
- echo "# The first commit's message is:" >> "$MSG"
- echo >> "$MSG"
- git cat-file commit HEAD | sed -e '1,/^$/d' >> "$MSG"
- echo >> "$MSG"
- echo "# And this is the 2nd commit message:" >> "$MSG"
- echo >> "$MSG"
- git cat-file commit $sha1 | sed -e '1,/^$/d' >> "$MSG"
- git reset --soft HEAD^
- author_script=$(get_author_ident_from_commit $sha1)
- case $failed in
- f)
+ echo "$author_script" > "$DOTEST"/author-script
+ if test $failed = f
+ then
# This is like --amend, but with a different message
eval "$author_script"
- export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
- git commit -F "$MSG" -e
- ;;
- t)
+ GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
+ GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
+ GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
+ $USE_OUTPUT git commit --no-verify -F "$MSG" $EDIT_COMMIT || failed=t
+ fi
+ if test $failed = t
+ then
cp "$MSG" "$GIT_DIR"/MERGE_MSG
warn
warn "Could not apply $sha1... $rest"
- warn "After you fixed that, commit the result with"
- warn
- warn " $(echo $author_script | tr '\012' ' ') \\"
- warn " git commit -F \"$GIT_DIR\"/MERGE_MSG -e"
die_with_patch $sha1 ""
- esac
+ fi
;;
*)
warn "Unknown command: $command $sha1 $rest"
die_with_patch $sha1 "Please fix this in the file $TODO."
+ ;;
esac
test -s "$TODO" && return
HEADNAME=$(cat "$DOTEST"/head-name) &&
OLDHEAD=$(cat "$DOTEST"/head) &&
SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
- if [ -d "$REWRITTEN" ]
+ if test -d "$REWRITTEN"
then
test -f "$DOTEST"/current-commit &&
current_commit=$(cat "$DOTEST"/current-commit) &&
git rev-parse HEAD > "$REWRITTEN"/$current_commit
- NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
+ if test -f "$REWRITTEN"/$OLDHEAD
+ then
+ NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
+ else
+ NEWHEAD=$OLDHEAD
+ fi
else
NEWHEAD=$(git rev-parse HEAD)
fi &&
- message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
- git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
- git symbolic-ref HEAD $HEADNAME &&
+ case $HEADNAME in
+ refs/*)
+ message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
+ git update-ref -m "$message" $HEADNAME $NEWHEAD $OLDHEAD &&
+ git symbolic-ref HEAD $HEADNAME
+ ;;
+ esac && {
+ test ! -f "$DOTEST"/verbose ||
+ git diff-tree --stat $(cat "$DOTEST"/head)..HEAD
+ } &&
rm -rf "$DOTEST" &&
+ git gc --auto &&
warn "Successfully rebased and updated $HEADNAME."
exit
do
do_next
done
- test -f "$DOTEST"/verbose &&
- git diff --stat $(cat "$DOTEST"/head)..HEAD
- exit
}
-while case $# in 0) break ;; esac
+while test $# != 0
do
case "$1" in
--continue)
test -d "$DOTEST" || die "No interactive rebase running"
+ # Sanity check
+ git rev-parse --verify HEAD >/dev/null ||
+ die "Cannot read HEAD"
+ git update-index --refresh && git diff-files --quiet ||
+ die "Working tree is dirty"
+
+ # do we have anything to commit?
+ if git diff-index --cached --quiet HEAD --
+ then
+ : Nothing to commit -- skip this
+ else
+ . "$DOTEST"/author-script ||
+ die "Cannot find the author identity"
+ if test -f "$DOTEST"/amend
+ then
+ git reset --soft HEAD^ ||
+ die "Cannot rewind the HEAD"
+ fi
+ export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE &&
+ git commit --no-verify -F "$DOTEST"/message -e ||
+ die "Could not commit staged changes."
+ fi
+
require_clean_work_tree
do_rest
;;
--abort)
comment_for_reflog abort
+ git rerere clear
test -d "$DOTEST" || die "No interactive rebase running"
HEADNAME=$(cat "$DOTEST"/head-name)
HEAD=$(cat "$DOTEST"/head)
- git symbolic-ref HEAD $HEADNAME &&
- git reset --hard $HEAD &&
+ case $HEADNAME in
+ refs/*)
+ git symbolic-ref HEAD $HEADNAME
+ ;;
+ esac &&
+ output git reset --hard $HEAD &&
rm -rf "$DOTEST"
exit
;;
--skip)
comment_for_reflog skip
+ git rerere clear
test -d "$DOTEST" || die "No interactive rebase running"
- git reset --hard && do_rest
+ output git reset --hard && do_rest
;;
-s|--strategy)
- shift
case "$#,$1" in
*,*=*)
- STRATEGY="-s `expr "z$1" : 'z-[^=]*=\(.*\)'`" ;;
+ STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
1,*)
usage ;;
*)
require_clean_work_tree
- if [ ! -z "$2"]
+ if test ! -z "$2"
then
- git show-ref --verify --quiet "refs/heads/$2" ||
+ output git show-ref --verify --quiet "refs/heads/$2" ||
die "Invalid branchname: $2"
- git checkout "$2" ||
+ output git checkout "$2" ||
die "Could not checkout $2"
fi
HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?"
UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
+ mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
+
test -z "$ONTO" && ONTO=$UPSTREAM
- mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
: > "$DOTEST"/interactive || die "Could not mark as interactive"
- git symbolic-ref HEAD > "$DOTEST"/head-name ||
- die "Could not get HEAD"
+ git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null ||
+ echo "detached HEAD" > "$DOTEST"/head-name
echo $HEAD > "$DOTEST"/head
echo $UPSTREAM > "$DOTEST"/upstream
echo $ONTO > "$DOTEST"/onto
+ test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
test t = "$VERBOSE" && : > "$DOTEST"/verbose
- if [ t = "$PRESERVE_MERGES" ]
+ if test t = "$PRESERVE_MERGES"
then
# $REWRITTEN contains files for each commit that is
# reachable by at least one merge base of $HEAD and
SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
SHORTHEAD=$(git rev-parse --short $HEAD)
SHORTONTO=$(git rev-parse --short $ONTO)
- cat > "$TODO" << EOF
-# Rebasing $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
+ git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
+ --abbrev=7 --reverse --left-right --cherry-pick \
+ $UPSTREAM...$HEAD | \
+ sed -n "s/^>/pick /p" > "$TODO"
+ cat >> "$TODO" << EOF
+
+# Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
#
# Commands:
# pick = use commit
# edit = use commit, but stop for amending
# squash = use commit, but meld into previous commit
+#
+# If you remove a line here THAT COMMIT WILL BE LOST.
+# However, if you remove everything, the rebase will be aborted.
+#
EOF
- git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
- --abbrev=7 --reverse $UPSTREAM..$HEAD | \
- sed "s/^/pick /" >> "$TODO"
- test -z "$(grep -ve '^$' -e '^#' < $TODO)" &&
+ has_action "$TODO" ||
die_abort "Nothing to do"
cp "$TODO" "$TODO".backup
- ${VISUAL:-${EDITOR:-vi}} "$TODO" ||
+ git_editor "$TODO" ||
die "Could not execute editor"
- test -z "$(grep -ve '^$' -e '^#' < $TODO)" &&
+ has_action "$TODO" ||
die_abort "Nothing to do"
- git checkout $ONTO && do_rest
+ output git checkout $ONTO && do_rest
+ ;;
esac
shift
done