# The original idea comes from Eric W. Biederman, in
# http://article.gmane.org/gmane.comp.version-control.git/22407
-USAGE='(--continue | --abort | --skip | [--onto <branch>] <upstream> [<branch>])'
+OPTIONS_KEEPDASHDASH=
+OPTIONS_SPEC="\
+git-rebase [-i] [options] [--] <upstream> [<branch>]
+git-rebase [-i] (--continue | --abort | --skip)
+--
+ Available options are
+v,verbose display a diffstat of what changed upstream
+onto= rebase onto given branch instead of upstream
+p,preserve-merges try to recreate merges instead of ignoring them
+s,strategy= use the given merge strategy
+m,merge always used (no-op)
+i,interactive always used (no-op)
+ Actions:
+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
require_work_tree
-DOTEST="$GIT_DIR/.dotest-merge"
-TODO="$DOTEST"/todo
+DOTEST="$GIT_DIR/rebase-merge"
+TODO="$DOTEST"/git-rebase-todo
DONE="$DOTEST"/done
+MSG="$DOTEST"/message
+SQUASH_MSG="$DOTEST"/message-squash
+REWRITTEN="$DOTEST"/rewritten
+DROPPED="$DOTEST"/dropped
+PRESERVE_MERGES=
STRATEGY=
+ONTO=
VERBOSE=
+OK_TO_SKIP_PRE_REBASE=
+REBASE_ROOT=
+
+GIT_CHERRY_PICK_HELP=" After resolving the conflicts,
+mark the corrected paths with 'git add <paths>', and
+run 'git rebase --continue'"
+export GIT_CHERRY_PICK_HELP
warn () {
echo "$*" >&2
}
+output () {
+ case "$VERBOSE" in
+ '')
+ output=$("$@" 2>&1 )
+ status=$?
+ test $status != 0 && printf "%s\n" "$output"
+ return $status
+ ;;
+ *)
+ "$@"
+ ;;
+ esac
+}
+
+run_pre_rebase_hook () {
+ 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."
+ exit 1
+ }
+ fi
+}
+
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 update-index --ignore-submodules --refresh &&
+ git diff-files --quiet --ignore-submodules &&
+ git diff-index --cached --quiet HEAD --ignore-submodules -- ||
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 -c '^[^#]' < "$DONE")
+ total=$(($count+$(grep -c '^[^#]' < "$TODO")))
+ if test "$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
+ 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 ||
+ get_author_ident_from_commit "$1" > "$DOTEST"/author-script
}
die_with_patch () {
make_patch "$1"
+ git rerere
die "$2"
}
die "$1"
}
+has_action () {
+ grep '^[^#]' "$1" >/dev/null
+}
+
pick_one () {
- case "$1" in -n) sha1=$2 ;; *) sha1=$1 ;; esac
- git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
- parent_sha1=$(git rev-parse --verify $sha1^ 2>/dev/null)
+ 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 "$@" && return
+ if test ! -z "$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 [ $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 $sha1
+ else
+ output git cherry-pick "$@"
+ fi
+}
+
+pick_one_preserving_merges () {
+ fast_forward=t
+ case "$1" in
+ -n)
+ fast_forward=f
+ sha1=$2
+ ;;
+ *)
+ sha1=$1
+ ;;
+ esac
+ sha1=$(git rev-parse $sha1)
+
+ if test -f "$DOTEST"/current-commit
+ then
+ 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
+
+ # rewrite parents; if none were rewritten, we can fast-forward.
+ new_parents=
+ 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
+ *$new_p*)
+ ;; # do nothing; that parent is already there
+ *)
+ new_parents="$new_parents $new_p"
+ ;;
+ esac
+ else
+ if test -f "$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
+ t)
+ output warn "Fast forward to $sha1"
+ output git reset --hard $sha1 ||
+ die "Cannot fast forward to $sha1"
+ ;;
+ f)
+ first_parent=$(expr "$new_parents" : ' \([^ ]*\)')
+
+ 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"
+ 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" \
+ $new_parents
+ then
+ printf "%s\n" "$msg" > "$GIT_DIR"/MERGE_MSG
+ die_with_patch $sha1 "Error redoing merge $sha1"
+ fi
+ ;;
+ *)
+ output git cherry-pick "$@" ||
+ 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" \
+ < "$SQUASH_MSG" | sed -ne '$p')+1))
+ echo "# This is a combination of $COUNT commits."
+ sed -e 1d -e '2,/^./{
+ /^$/d
+ }' <"$SQUASH_MSG"
else
- git cherry-pick $STRATEGY "$@"
+ 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
- \#|'')
+ '#'*|''|noop)
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 $sha1
- warn
+ git rev-parse --verify HEAD > "$DOTEST"/amend
+ warn "Stopped at $sha1... $rest"
warn "You can amend the commit now, with"
warn
warn " git commit --amend"
warn
+ warn "Once you are satisfied with your changes, run"
+ warn
+ warn " git rebase --continue"
+ warn
exit 0
;;
- squash)
+ squash|s)
comment_for_reflog squash
- test -z "$(grep -ve '^$' -e '^#' < $DONE)" &&
+ test -f "$DONE" && has_action "$DONE" ||
die "Cannot 'squash' without a previous commit"
mark_action_done
+ make_squash_message $sha1 > "$MSG"
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 $failed in
- f)
+ case "$(peek_next_command)" in
+ squash|s)
+ USE_OUTPUT=output
+ MSG_OPT=-F
+ EDIT_OR_FILE="$MSG"
+ cp "$MSG" "$SQUASH_MSG"
+ ;;
+ *)
+ USE_OUTPUT=
+ MSG_OPT=
+ EDIT_OR_FILE=-e
+ rm -f "$SQUASH_MSG" || exit
+ cp "$MSG" "$GIT_DIR"/SQUASH_MSG
+ rm -f "$GIT_DIR"/MERGE_MSG || exit
+ ;;
+ esac
+ echo "$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 \
+ $MSG_OPT "$EDIT_OR_FILE" || 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
OLDHEAD=$(cat "$DOTEST"/head) &&
SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
NEWHEAD=$(git rev-parse HEAD) &&
- message="$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 $# in 0) break ;; esac
+# skip picking commits whose parents are unchanged
+skip_unnecessary_picks () {
+ fd=3
+ while read command sha1 rest
+ do
+ # fd=3 means we skip the command
+ case "$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 "$2" = '--' &&
+ test -z "$ONTO" &&
+ test -z "$PRESERVE_MERGES" &&
+ test -z "$STRATEGY" &&
+ test -z "$VERBOSE"
+}
+
+get_saved_options () {
+ test -d "$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
comment_for_reflog continue
test -d "$DOTEST" || die "No interactive rebase running"
+ # Sanity check
+ git rev-parse --verify HEAD >/dev/null ||
+ die "Cannot read HEAD"
+ git update-index --ignore-submodules --refresh &&
+ git diff-files --quiet --ignore-submodules ||
+ die "Working tree is dirty"
+
+ # do we have anything to commit?
+ if git diff-index --cached --quiet --ignore-submodules HEAD --
+ then
+ : Nothing to commit -- skip this
+ else
+ . "$DOTEST"/author-script ||
+ die "Cannot find the author identity"
+ amend=
+ if test -f "$DOTEST"/amend
+ then
+ amend=$(git rev-parse --verify HEAD)
+ test "$amend" = $(cat "$DOTEST"/amend) ||
+ die "\
+You have uncommitted changes in your working tree. Please, commit them
+first and then run 'git rebase --continue' again."
+ 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 "$DOTEST"/message -e || {
+ test -n "$amend" && git reset --soft $amend
+ die "Could not commit staged changes."
+ }
+ fi
+
require_clean_work_tree
do_rest
;;
--abort)
+ is_standalone "$@" || usage
+ get_saved_options
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)
+ is_standalone "$@" || usage
+ get_saved_options
comment_for_reflog skip
+ git rerere clear
test -d "$DOTEST" || die "No interactive rebase running"
- git reset --hard && do_rest
+ output git reset --hard && do_rest
;;
- -s|--strategy)
- shift
+ -s)
case "$#,$1" in
*,*=*)
- STRATEGY="-s `expr "z$1" : 'z-[^=]*=\(.*\)'`" ;;
+ STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
1,*)
usage ;;
*)
shift ;;
esac
;;
- --merge)
+ -m)
# we use merge anyway
;;
- -C*)
- die "Interactive rebase uses merge, so $1 does not make sense"
- ;;
- -v|--verbose)
+ -v)
VERBOSE=t
;;
- -i|--interactive)
+ -p)
+ PRESERVE_MERGES=t
+ ;;
+ -i)
# yeah, we know
;;
- ''|-h)
- usage
+ --root)
+ REBASE_ROOT=t
;;
- *)
+ --onto)
+ shift
+ ONTO=$(git rev-parse --verify "$1") ||
+ die "Does not point to a valid commit: $1"
+ ;;
+ --)
+ shift
+ test -z "$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"
- comment_for_reflog start
+ 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 "$UPSTREAM_ARG" "$@"
- ONTO=
- case "$1" in
- --onto)
- ONTO=$(git rev-parse --verify "$2") ||
- die "Does not point to a valid commit: $2"
- shift; shift
- ;;
- esac
+ comment_for_reflog start
require_clean_work_tree
- if [ ! -z "$2"]
+ if test ! -z "$1"
then
- git show-ref --verify --quiet "refs/heads/$2" ||
- die "Invalid branchname: $2"
- 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?"
- UPSTREAM=$(git rev-parse --verify "$1") || die "Invalid base"
-
- test -z "$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
+ 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" && : > "$DOTEST"/verbose
+ if test t = "$PRESERVE_MERGES"
+ then
+ # $REWRITTEN contains files for each commit that is
+ # reachable by at least one merge base of $HEAD and
+ # $UPSTREAM. They are not necessarily rewritten, but
+ # their children might be.
+ # This ensures that commits on merged, but otherwise
+ # unrelated side branches are left alone. (Think "X"
+ # in the man page's example.)
+ if test -z "$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"
+ 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 --cherry-pick"
+ fi
- 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 $SHORTONTO
+ if test -z "$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 --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 $SHORTREVISIONS onto $SHORTONTO
#
# Commands:
-# pick = use commit
-# edit = use commit, but stop for amending
-# squash = use commit, but meld into previous commit
+# p, pick = use commit
+# e, edit = use commit, but stop for amending
+# s, 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 --no-merges --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 $ONTO && do_rest
+ test -d "$REWRITTEN" || skip_unnecessary_picks
+
+ git update-ref ORIG_HEAD $HEAD
+ output git checkout $ONTO && do_rest
+ ;;
esac
shift
done