continue continue rebasing process
abort abort rebasing process and restore original branch
skip skip current patch and continue rebasing process
+no-verify override pre-rebase hook from stopping the operation
+root rebase all reachable commmits up to the root(s)
"
. git-sh-setup
MSG="$DOTEST"/message
SQUASH_MSG="$DOTEST"/message-squash
REWRITTEN="$DOTEST"/rewritten
+DROPPED="$DOTEST"/dropped
PRESERVE_MERGES=
STRATEGY=
ONTO=
VERBOSE=
+OK_TO_SKIP_PRE_REBASE=
+REBASE_ROOT=
GIT_CHERRY_PICK_HELP=" After resolving the conflicts,
mark the corrected paths with 'git add <paths>', and
}
run_pre_rebase_hook () {
- if test -x "$GIT_DIR/hooks/pre-rebase"
+ if test -z "$OK_TO_SKIP_PRE_REBASE" &&
+ test -x "$GIT_DIR/hooks/pre-rebase"
then
"$GIT_DIR/hooks/pre-rebase" ${1+"$@"} || {
echo >&2 "The pre-rebase hook refused to rebase."
}
make_patch () {
- parent_sha1=$(git rev-parse --verify "$1"^) ||
- die "Cannot get patch for $1^"
- git diff-tree -p "$parent_sha1".."$1" > "$DOTEST"/patch
+ sha1_and_parents="$(git rev-list --parents -1 "$1")"
+ case "$sha1_and_parents" in
+ ?*' '?*' '?*)
+ git diff --cc $sha1_and_parents
+ ;;
+ ?*' '?*)
+ git diff-tree -p "$1^!"
+ ;;
+ *)
+ echo "Root commit"
+ ;;
+ esac > "$DOTEST"/patch
test -f "$DOTEST"/message ||
git cat-file commit "$1" | sed "1,/^$/d" > "$DOTEST"/message
test -f "$DOTEST"/author-script ||
output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
test -d "$REWRITTEN" &&
pick_one_preserving_merges "$@" && return
+ if test ! -z "$REBASE_ROOT"
+ then
+ output git cherry-pick "$@"
+ return
+ fi
parent_sha1=$(git rev-parse --verify $sha1^) ||
die "Could not get the parent of $sha1"
current_sha1=$(git rev-parse --verify HEAD)
if test -f "$DOTEST"/current-commit
then
- current_commit=$(cat "$DOTEST"/current-commit) &&
- git rev-parse HEAD > "$REWRITTEN"/$current_commit &&
- rm "$DOTEST"/current-commit ||
- die "Cannot write current commit's replacement sha1"
+ if test "$fast_forward" = t
+ then
+ cat "$DOTEST"/current-commit | while read current_commit
+ do
+ git rev-parse HEAD > "$REWRITTEN"/$current_commit
+ done
+ rm "$DOTEST"/current-commit ||
+ die "Cannot write current commit's replacement sha1"
+ fi
fi
- echo $sha1 > "$DOTEST"/current-commit
+ echo $sha1 >> "$DOTEST"/current-commit
# rewrite parents; if none were rewritten, we can fast-forward.
new_parents=
- for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -f2-)
+ pend=" $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-)"
+ if test "$pend" = " "
+ then
+ pend=" root"
+ fi
+ while [ "$pend" != "" ]
do
+ p=$(expr "$pend" : ' \([^ ]*\)')
+ pend="${pend# $p}"
+
if test -f "$REWRITTEN"/$p
then
new_p=$(cat "$REWRITTEN"/$p)
+
+ # If the todo reordered commits, and our parent is marked for
+ # rewriting, but hasn't been gotten to yet, assume the user meant to
+ # drop it on top of the current HEAD
+ if test -z "$new_p"
+ then
+ new_p=$(git rev-parse HEAD)
+ fi
+
test $p != $new_p && fast_forward=f
case "$new_parents" in
*$new_p*)
;;
esac
else
- new_parents="$new_parents $p"
+ if test -f "$DROPPED"/$p
+ then
+ fast_forward=f
+ replacement="$(cat "$DROPPED"/$p)"
+ test -z "$replacement" && replacement=root
+ pend=" $replacement$pend"
+ else
+ new_parents="$new_parents $p"
+ fi
fi
done
case $fast_forward in
die "Cannot fast forward to $sha1"
;;
f)
- test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
-
first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
- # detach HEAD to current parent
- output git checkout $first_parent 2> /dev/null ||
- die "Cannot move HEAD to $first_parent"
+
+ if [ "$1" != "-n" ]
+ then
+ # detach HEAD to current parent
+ output git checkout $first_parent 2> /dev/null ||
+ die "Cannot move HEAD to $first_parent"
+ fi
case "$new_parents" in
' '*' '*)
+ test "a$1" = a-n && die "Refusing to squash a merge: $sha1"
+
# redo merge
author_script=$(get_author_ident_from_commit $sha1)
eval "$author_script"
output git merge $STRATEGY -m "$msg" \
$new_parents
then
- git rerere
printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
- die Error redoing merge $sha1
+ die_with_patch $sha1 "Error redoing merge $sha1"
fi
;;
*)
pick_one -n $sha1 || failed=t
case "$(peek_next_command)" in
squash|s)
- EDIT_COMMIT=
USE_OUTPUT=output
MSG_OPT=-F
- MSG_FILE="$MSG"
+ EDIT_OR_FILE="$MSG"
cp "$MSG" "$SQUASH_MSG"
;;
*)
- EDIT_COMMIT=-e
USE_OUTPUT=
MSG_OPT=
- MSG_FILE=
+ EDIT_OR_FILE=-e
rm -f "$SQUASH_MSG" || exit
cp "$MSG" "$GIT_DIR"/SQUASH_MSG
rm -f "$GIT_DIR"/MERGE_MSG || exit
GIT_AUTHOR_NAME="$GIT_AUTHOR_NAME" \
GIT_AUTHOR_EMAIL="$GIT_AUTHOR_EMAIL" \
GIT_AUTHOR_DATE="$GIT_AUTHOR_DATE" \
- $USE_OUTPUT git commit --no-verify $MSG_OPT "$MSG_FILE" $EDIT_COMMIT || failed=t
+ $USE_OUTPUT git commit --no-verify \
+ $MSG_OPT "$EDIT_OR_FILE" || failed=t
fi
if test $failed = t
then
HEADNAME=$(cat "$DOTEST"/head-name) &&
OLDHEAD=$(cat "$DOTEST"/head) &&
SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
- if test -d "$REWRITTEN"
- then
- test -f "$DOTEST"/current-commit &&
- current_commit=$(cat "$DOTEST"/current-commit) &&
- git rev-parse HEAD > "$REWRITTEN"/$current_commit
- if test -f "$REWRITTEN"/$OLDHEAD
- then
- NEWHEAD=$(cat "$REWRITTEN"/$OLDHEAD)
- else
- NEWHEAD=$OLDHEAD
- fi
- else
- NEWHEAD=$(git rev-parse HEAD)
- fi &&
+ NEWHEAD=$(git rev-parse HEAD) &&
case $HEADNAME in
refs/*)
message="$GIT_REFLOG_ACTION: $HEADNAME onto $SHORTONTO)" &&
done
}
+# skip picking commits whose parents are unchanged
+skip_unnecessary_picks () {
+ fd=3
+ while read command sha1 rest
+ do
+ # fd=3 means we skip the command
+ case "$fd,$command,$(git rev-parse --verify --quiet $sha1^)" in
+ 3,pick,"$ONTO"*|3,p,"$ONTO"*)
+ # pick a commit whose parent is current $ONTO -> skip
+ ONTO=$sha1
+ ;;
+ 3,#*|3,,*)
+ # copy comments
+ ;;
+ *)
+ fd=1
+ ;;
+ esac
+ echo "$command${sha1:+ }$sha1${rest:+ }$rest" >&$fd
+ done <"$TODO" >"$TODO.new" 3>>"$DONE" &&
+ mv -f "$TODO".new "$TODO" ||
+ die "Could not skip unnecessary pick commands"
+}
+
# check if no other options are set
is_standalone () {
test $# -eq 2 -a "$2" = '--' &&
test -d "$REWRITTEN" && PRESERVE_MERGES=t
test -f "$DOTEST"/strategy && STRATEGY="$(cat "$DOTEST"/strategy)"
test -f "$DOTEST"/verbose && VERBOSE=t
+ test -f "$DOTEST"/rebase-root && REBASE_ROOT=t
}
while test $# != 0
do
case "$1" in
+ --no-verify)
+ OK_TO_SKIP_PRE_REBASE=yes
+ ;;
+ --verify)
+ ;;
--continue)
is_standalone "$@" || usage
get_saved_options
-i)
# yeah, we know
;;
+ --root)
+ REBASE_ROOT=t
+ ;;
--onto)
shift
ONTO=$(git rev-parse --verify "$1") ||
;;
--)
shift
- run_pre_rebase_hook ${1+"$@"}
- test $# -eq 1 -o $# -eq 2 || usage
+ test -z "$REBASE_ROOT" -a $# -ge 1 -a $# -le 2 ||
+ test ! -z "$REBASE_ROOT" -a $# -le 1 || usage
test -d "$DOTEST" &&
die "Interactive rebase already started"
git var GIT_COMMITTER_IDENT >/dev/null ||
die "You need to set your committer info first"
+ if test -z "$REBASE_ROOT"
+ then
+ UPSTREAM_ARG="$1"
+ UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
+ test -z "$ONTO" && ONTO=$UPSTREAM
+ shift
+ else
+ UPSTREAM=
+ UPSTREAM_ARG=--root
+ test -z "$ONTO" &&
+ die "You must specify --onto when using --root"
+ fi
+ run_pre_rebase_hook "$UPSTREAM_ARG" "$@"
+
comment_for_reflog start
require_clean_work_tree
- UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
- test -z "$ONTO" && ONTO=$UPSTREAM
-
- if test ! -z "$2"
+ if test ! -z "$1"
then
- output git show-ref --verify --quiet "refs/heads/$2" ||
- die "Invalid branchname: $2"
- output git checkout "$2" ||
- die "Could not checkout $2"
+ output git show-ref --verify --quiet "refs/heads/$1" ||
+ die "Invalid branchname: $1"
+ output git checkout "$1" ||
+ die "Could not checkout $1"
fi
HEAD=$(git rev-parse --verify HEAD) || die "No HEAD?"
echo "detached HEAD" > "$DOTEST"/head-name
echo $HEAD > "$DOTEST"/head
- echo $UPSTREAM > "$DOTEST"/upstream
+ case "$REBASE_ROOT" in
+ '')
+ rm -f "$DOTEST"/rebase-root ;;
+ *)
+ : >"$DOTEST"/rebase-root ;;
+ esac
echo $ONTO > "$DOTEST"/onto
test -z "$STRATEGY" || echo "$STRATEGY" > "$DOTEST"/strategy
test t = "$VERBOSE" && : > "$DOTEST"/verbose
# This ensures that commits on merged, but otherwise
# unrelated side branches are left alone. (Think "X"
# in the man page's example.)
- mkdir "$REWRITTEN" &&
- for c in $(git merge-base --all $HEAD $UPSTREAM)
- do
- echo $ONTO > "$REWRITTEN"/$c ||
+ if test -z "$REBASE_ROOT"
+ then
+ mkdir "$REWRITTEN" &&
+ for c in $(git merge-base --all $HEAD $UPSTREAM)
+ do
+ echo $ONTO > "$REWRITTEN"/$c ||
+ die "Could not init rewritten commits"
+ done
+ else
+ mkdir "$REWRITTEN" &&
+ echo $ONTO > "$REWRITTEN"/root ||
die "Could not init rewritten commits"
- done
+ fi
+ # No cherry-pick because our first pass is to determine
+ # parents to rewrite and skipping dropped commits would
+ # prematurely end our probe
MERGES_OPTION=
+ first_after_upstream="$(git rev-list --reverse --first-parent $UPSTREAM..$HEAD | head -n 1)"
else
- MERGES_OPTION=--no-merges
+ MERGES_OPTION="--no-merges --cherry-pick"
fi
- SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
SHORTHEAD=$(git rev-parse --short $HEAD)
SHORTONTO=$(git rev-parse --short $ONTO)
+ if test -z "$REBASE_ROOT"
+ # this is now equivalent to ! -z "$UPSTREAM"
+ then
+ SHORTUPSTREAM=$(git rev-parse --short $UPSTREAM)
+ REVISIONS=$UPSTREAM...$HEAD
+ SHORTREVISIONS=$SHORTUPSTREAM..$SHORTHEAD
+ else
+ REVISIONS=$ONTO...$HEAD
+ SHORTREVISIONS=$SHORTHEAD
+ fi
git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
- --abbrev=7 --reverse --left-right --cherry-pick \
- $UPSTREAM...$HEAD | \
- sed -n "s/^>/pick /p" > "$TODO"
+ --abbrev=7 --reverse --left-right --topo-order \
+ $REVISIONS | \
+ sed -n "s/^>//p" | while read shortsha1 rest
+ do
+ if test t != "$PRESERVE_MERGES"
+ then
+ echo "pick $shortsha1 $rest" >> "$TODO"
+ else
+ sha1=$(git rev-parse $shortsha1)
+ if test -z "$REBASE_ROOT"
+ then
+ preserve=t
+ for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-)
+ do
+ if test -f "$REWRITTEN"/$p -a \( $p != $UPSTREAM -o $sha1 = $first_after_upstream \)
+ then
+ preserve=f
+ fi
+ done
+ else
+ preserve=f
+ fi
+ if test f = "$preserve"
+ then
+ touch "$REWRITTEN"/$sha1
+ echo "pick $shortsha1 $rest" >> "$TODO"
+ fi
+ fi
+ done
+
+ # Watch for commits that been dropped by --cherry-pick
+ if test t = "$PRESERVE_MERGES"
+ then
+ mkdir "$DROPPED"
+ # Save all non-cherry-picked changes
+ git rev-list $REVISIONS --left-right --cherry-pick | \
+ sed -n "s/^>//p" > "$DOTEST"/not-cherry-picks
+ # Now all commits and note which ones are missing in
+ # not-cherry-picks and hence being dropped
+ git rev-list $REVISIONS |
+ while read rev
+ do
+ if test -f "$REWRITTEN"/$rev -a "$(grep "$rev" "$DOTEST"/not-cherry-picks)" = ""
+ then
+ # Use -f2 because if rev-list is telling us this commit is
+ # not worthwhile, we don't want to track its multiple heads,
+ # just the history of its first-parent for others that will
+ # be rebasing on top of it
+ git rev-list --parents -1 $rev | cut -d' ' -s -f2 > "$DROPPED"/$rev
+ short=$(git rev-list -1 --abbrev-commit --abbrev=7 $rev)
+ grep -v "^[a-z][a-z]* $short" <"$TODO" > "${TODO}2" ; mv "${TODO}2" "$TODO"
+ rm "$REWRITTEN"/$rev
+ fi
+ done
+ fi
+
test -s "$TODO" || echo noop >> "$TODO"
cat >> "$TODO" << EOF
-# Rebase $SHORTUPSTREAM..$SHORTHEAD onto $SHORTONTO
+# Rebase $SHORTREVISIONS onto $SHORTONTO
#
# Commands:
# p, pick = use commit
has_action "$TODO" ||
die_abort "Nothing to do"
+ test -d "$REWRITTEN" || skip_unnecessary_picks
+
git update-ref ORIG_HEAD $HEAD
output git checkout $ONTO && do_rest
;;