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b499549401
git-commit-vandalism/git-rebase--interactive.sh
Marc Branchaud b499549401 Teach rebase the --no-ff option. 
For git-rebase.sh, --no-ff is a synonym for --force-rebase.

For git-rebase--interactive.sh, --no-ff cherry-picks all the commits in
the rebased branch, instead of fast-forwarding over any unchanged commits.

--no-ff offers an alternative way to deal with reverted merges.  Instead of
"reverting the revert" you can use "rebase --no-ff" to recreate the branch
with entirely new commits (they're new because at the very least the
committer time is different).  This obviates the need to revert the
reversion, as you can re-merge the new topic branch directly.  Added an
addendum to revert-a-faulty-merge.txt describing the situation and how to
use --no-ff to handle it.

Signed-off-by: Marc Branchaud <marcnarc@xiplink.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-03-24 14:42:57 -07:00

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#!/bin/sh
#
# Copyright (c) 2006 Johannes E. Schindelin
# SHORT DESCRIPTION
#
# This script makes it easy to fix up commits in the middle of a series,
# and rearrange commits.
#
# The original idea comes from Eric W. Biederman, in
# http://article.gmane.org/gmane.comp.version-control.git/22407
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
no-ff cherry-pick all commits, even if unchanged
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)
autosquash move commits that begin with squash!/fixup! under -i
"
. git-sh-setup
require_work_tree
DOTEST="$GIT_DIR/rebase-merge"
# The file containing rebase commands, comments, and empty lines.
# This file is created by "git rebase -i" then edited by the user. As
# the lines are processed, they are removed from the front of this
# file and written to the tail of $DONE.
TODO="$DOTEST"/git-rebase-todo
# The rebase command lines that have already been processed. A line
# is moved here when it is first handled, before any associated user
# actions.
DONE="$DOTEST"/done
# The commit message that is planned to be used for any changes that
# need to be committed following a user interaction.
MSG="$DOTEST"/message
# The file into which is accumulated the suggested commit message for
# squash/fixup commands. When the first of a series of squash/fixups
# is seen, the file is created and the commit message from the
# previous commit and from the first squash/fixup commit are written
# to it. The commit message for each subsequent squash/fixup commit
# is appended to the file as it is processed.
#
# The first line of the file is of the form
# # This is a combination of $COUNT commits.
# where $COUNT is the number of commits whose messages have been
# written to the file so far (including the initial "pick" commit).
# Each time that a commit message is processed, this line is read and
# updated. It is deleted just before the combined commit is made.
SQUASH_MSG="$DOTEST"/message-squash
# If the current series of squash/fixups has not yet included a squash
# command, then this file exists and holds the commit message of the
# original "pick" commit. (If the series ends without a "squash"
# command, then this can be used as the commit message of the combined
# commit without opening the editor.)
FIXUP_MSG="$DOTEST"/message-fixup
# $REWRITTEN is the name of a directory containing files for each
# commit that is reachable by at least one merge base of $HEAD and
# $UPSTREAM. They are not necessarily rewritten, but their children
# might be. This ensures that commits on merged, but otherwise
# unrelated side branches are left alone. (Think "X" in the man page's
# example.)
REWRITTEN="$DOTEST"/rewritten
DROPPED="$DOTEST"/dropped
# A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and
# GIT_AUTHOR_DATE that will be used for the commit that is currently
# being rebased.
AUTHOR_SCRIPT="$DOTEST"/author-script
# When an "edit" rebase command is being processed, the SHA1 of the
# commit to be edited is recorded in this file. When "git rebase
# --continue" is executed, if there are any staged changes then they
# will be amended to the HEAD commit, but only provided the HEAD
# commit is still the commit to be edited. When any other rebase
# command is processed, this file is deleted.
AMEND="$DOTEST"/amend
PRESERVE_MERGES=
STRATEGY=
ONTO=
VERBOSE=
OK_TO_SKIP_PRE_REBASE=
REBASE_ROOT=
AUTOSQUASH=
NEVER_FF=
GIT_CHERRY_PICK_HELP=" After resolving the conflicts,
mark the corrected paths with 'git add <paths>', and
run 'git rebase --continue'"
export GIT_CHERRY_PICK_HELP
warn () {
echo "$*" >&2
}
output () {
case "$VERBOSE" in
'')
output=$("$@" 2>&1 )
status=$?
test $status != 0 && printf "%s\n" "$output"
return $status
;;
*)
"$@"
;;
esac
}
# Output the commit message for the specified commit.
commit_message () {
git cat-file commit "$1" | sed "1,/^$/d"
}
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 --ignore-submodules --refresh &&
git diff-files --quiet --ignore-submodules &&
git diff-index --cached --quiet HEAD --ignore-submodules -- ||
die "Working tree is dirty"
}
ORIG_REFLOG_ACTION="$GIT_REFLOG_ACTION"
comment_for_reflog () {
case "$ORIG_REFLOG_ACTION" in
''|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 "$TODO"
count=$(sane_grep -c '^[^#]' < "$DONE")
total=$(($count+$(sane_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 () {
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 "$MSG" ||
commit_message "$1" > "$MSG"
test -f "$AUTHOR_SCRIPT" ||
get_author_ident_from_commit "$1" > "$AUTHOR_SCRIPT"
}
die_with_patch () {
make_patch "$1"
git rerere
die "$2"
}
die_abort () {
rm -rf "$DOTEST"
die "$1"
}
has_action () {
sane_grep '^[^#]' "$1" >/dev/null
}
# Run command with GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and
# GIT_AUTHOR_DATE exported from the current environment.
do_with_author () {
(
export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
"$@"
)
}
pick_one () {
no_ff=$NEVER_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 "$@" && return
if test -n "$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 -z "$no_ff" && test "$current_sha1" = "$parent_sha1"
then
output git reset --hard $sha1
output warn Fast-forward to $(git rev-parse --short $sha1)
else
output git cherry-pick "$@"
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="$(commit_message $sha1)"
# No point in merging the first parent, that's HEAD
new_parents=${new_parents# $first_parent}
if ! do_with_author 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 "$1"rd;;
esac
}
update_squash_messages () {
if test -f "$SQUASH_MSG"; then
mv "$SQUASH_MSG" "$SQUASH_MSG".bak || exit
COUNT=$(($(sed -n \
-e "1s/^# This is a combination of \(.*\) commits\./\1/p" \
-e "q" < "$SQUASH_MSG".bak)+1))
{
echo "# This is a combination of $COUNT commits."
sed -e 1d -e '2,/^./{
/^$/d
}' <"$SQUASH_MSG".bak
} >"$SQUASH_MSG"
else
commit_message HEAD > "$FIXUP_MSG" || die "Cannot write $FIXUP_MSG"
COUNT=2
{
echo "# This is a combination of 2 commits."
echo "# The first commit's message is:"
echo
cat "$FIXUP_MSG"
} >"$SQUASH_MSG"
fi
case $1 in
squash)
rm -f "$FIXUP_MSG"
echo
echo "# This is the $(nth_string $COUNT) commit message:"
echo
commit_message $2
;;
fixup)
echo
echo "# The $(nth_string $COUNT) commit message will be skipped:"
echo
commit_message $2 | sed -e 's/^/# /'
;;
esac >>"$SQUASH_MSG"
}
peek_next_command () {
sed -n -e "/^#/d" -e '/^$/d' -e "s/ .*//p" -e "q" < "$TODO"
}
# A squash/fixup has failed. Prepare the long version of the squash
# commit message, then die_with_patch. This code path requires the
# user to edit the combined commit message for all commits that have
# been squashed/fixedup so far. So also erase the old squash
# messages, effectively causing the combined commit to be used as the
# new basis for any further squash/fixups. Args: sha1 rest
die_failed_squash() {
mv "$SQUASH_MSG" "$MSG" || exit
rm -f "$FIXUP_MSG"
cp "$MSG" "$GIT_DIR"/MERGE_MSG || exit
warn
warn "Could not apply $1... $2"
die_with_patch $1 ""
}
do_next () {
rm -f "$MSG" "$AUTHOR_SCRIPT" "$AMEND" || exit
read command sha1 rest < "$TODO"
case "$command" in
'#'*|''|noop)
mark_action_done
;;
pick|p)
comment_for_reflog pick
mark_action_done
pick_one $sha1 ||
die_with_patch $sha1 "Could not apply $sha1... $rest"
;;
reword|r)
comment_for_reflog reword
mark_action_done
pick_one $sha1 ||
die_with_patch $sha1 "Could not apply $sha1... $rest"
git commit --amend
;;
edit|e)
comment_for_reflog edit
mark_action_done
pick_one $sha1 ||
die_with_patch $sha1 "Could not apply $sha1... $rest"
make_patch $sha1
git rev-parse --verify HEAD > "$AMEND"
warn "Stopped at $sha1... $rest"
warn "You can amend the commit now, with"
warn
warn " git commit --amend"
warn
warn "Once you are satisfied with your changes, run"
warn
warn " git rebase --continue"
warn
exit 0
;;
squash|s|fixup|f)
case "$command" in
squash|s)
squash_style=squash
;;
fixup|f)
squash_style=fixup
;;
esac
comment_for_reflog $squash_style
test -f "$DONE" && has_action "$DONE" ||
die "Cannot '$squash_style' without a previous commit"
mark_action_done
update_squash_messages $squash_style $sha1
author_script=$(get_author_ident_from_commit HEAD)
echo "$author_script" > "$AUTHOR_SCRIPT"
eval "$author_script"
output git reset --soft HEAD^
pick_one -n $sha1 || die_failed_squash $sha1 "$rest"
case "$(peek_next_command)" in
squash|s|fixup|f)
# This is an intermediate commit; its message will only be
# used in case of trouble. So use the long version:
do_with_author output git commit --no-verify -F "$SQUASH_MSG" ||
die_failed_squash $sha1 "$rest"
;;
*)
# This is the final command of this squash/fixup group
if test -f "$FIXUP_MSG"
then
do_with_author git commit --no-verify -F "$FIXUP_MSG" ||
die_failed_squash $sha1 "$rest"
else
cp "$SQUASH_MSG" "$GIT_DIR"/SQUASH_MSG || exit
rm -f "$GIT_DIR"/MERGE_MSG
do_with_author git commit --no-verify -e ||
die_failed_squash $sha1 "$rest"
fi
rm -f "$SQUASH_MSG" "$FIXUP_MSG"
;;
esac
;;
*)
warn "Unknown command: $command $sha1 $rest"
if git rev-parse --verify -q "$sha1" >/dev/null
then
die_with_patch $sha1 "Please fix this in the file $TODO."
else
die "Please fix this in the file $TODO."
fi
;;
esac
test -s "$TODO" && return
comment_for_reflog finish &&
HEADNAME=$(cat "$DOTEST"/head-name) &&
OLDHEAD=$(cat "$DOTEST"/head) &&
SHORTONTO=$(git rev-parse --short $(cat "$DOTEST"/onto)) &&
NEWHEAD=$(git rev-parse HEAD) &&
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 $HEADNAME."
exit
}
do_rest () {
while :
do
do_next
done
}
# skip picking commits whose parents are unchanged
skip_unnecessary_picks () {
fd=3
while read command sha1 rest
do
# fd=3 means we skip the command
case "$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 "$2" = '--' &&
test -z "$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
}
# Rearrange the todo list that has both "pick sha1 msg" and
# "pick sha1 fixup!/squash! msg" appears in it so that the latter
# comes immediately after the former, and change "pick" to
# "fixup"/"squash".
rearrange_squash () {
sed -n -e 's/^pick \([0-9a-f]*\) \(squash\)! /\1 \2 /p' \
-e 's/^pick \([0-9a-f]*\) \(fixup\)! /\1 \2 /p' \
"$1" >"$1.sq"
test -s "$1.sq" || return
used=
while read pick sha1 message
do
case " $used" in
*" $sha1 "*) continue ;;
esac
echo "$pick $sha1 $message"
while read squash action msg
do
case "$message" in
"$msg"*)
echo "$action $squash $action! $msg"
used="$used$squash "
;;
esac
done <"$1.sq"
done >"$1.rearranged" <"$1"
cat "$1.rearranged" >"$1"
rm -f "$1.sq" "$1.rearranged"
}
LF='
'
parse_onto () {
case "$1" in
*...*)
if left=${1%...*} right=${1#*...} &&
onto=$(git merge-base --all ${left:-HEAD} ${right:-HEAD})
then
case "$onto" in
?*"$LF"?* | '')
exit 1 ;;
esac
echo "$onto"
exit 0
fi
esac
git rev-parse --verify "$1^0"
}
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 "$DOTEST" || die "No interactive rebase running"
# Sanity check
git rev-parse --verify HEAD >/dev/null ||
die "Cannot read HEAD"
git update-index --ignore-submodules --refresh &&
git diff-files --quiet --ignore-submodules ||
die "Working tree is dirty"
# do we have anything to commit?
if git diff-index --cached --quiet --ignore-submodules HEAD --
then
: Nothing to commit -- skip this
else
. "$AUTHOR_SCRIPT" ||
die "Cannot find the author identity"
amend=
if test -f "$AMEND"
then
amend=$(git rev-parse --verify HEAD)
test "$amend" = $(cat "$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
do_with_author git commit --no-verify -F "$MSG" -e || {
test -n "$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)
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"
output git reset --hard && do_rest
;;
-s)
case "$#,$1" in
*,*=*)
STRATEGY="-s "$(expr "z$1" : 'z-[^=]*=\(.*\)') ;;
1,*)
usage ;;
*)
STRATEGY="-s $2"
shift ;;
esac
;;
-m)
# we use merge anyway
;;
-v)
VERBOSE=t
;;
-p)
PRESERVE_MERGES=t
;;
-i)
# yeah, we know
;;
--no-ff)
NEVER_FF=t
;;
--root)
REBASE_ROOT=t
;;
--autosquash)
AUTOSQUASH=t
;;
--onto)
shift
ONTO=$(parse_onto "$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"
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
if test ! -z "$1"
then
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?"
mkdir "$DOTEST" || die "Could not create temporary $DOTEST"
: > "$DOTEST"/interactive || die "Could not mark as interactive"
git symbolic-ref HEAD > "$DOTEST"/head-name 2> /dev/null ||
echo "detached HEAD" > "$DOTEST"/head-name
echo $HEAD > "$DOTEST"/head
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
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
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 --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 \( $p != $ONTO -o $sha1 = $first_after_upstream \)
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"/$rev -a "$(sane_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)
sane_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 >> "$TODO"
test -n "$AUTOSQUASH" && rearrange_squash "$TODO"
cat >> "$TODO" << EOF
# Rebase $SHORTREVISIONS onto $SHORTONTO
#
# Commands:
# p, pick = use commit
# r, reword = use commit, but edit the commit message
# e, edit = use commit, but stop for amending
# s, squash = use commit, but meld into previous commit
# f, fixup = like "squash", but discard this commit's log message
#
# If you remove a line here THAT COMMIT WILL BE LOST.
# However, if you remove everything, the rebase will be aborted.
#
EOF
has_action "$TODO" ||
die_abort "Nothing to do"
cp "$TODO" "$TODO".backup
git_editor "$TODO" ||
die_abort "Could not execute editor"
has_action "$TODO" ||
die_abort "Nothing to do"
test -d "$REWRITTEN" || test -n "$NEVER_FF" || skip_unnecessary_picks
git update-ref ORIG_HEAD $HEAD
output git checkout $ONTO && do_rest
;;
esac
shift
done
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