git/git-rebase--interactive.sh

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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
#
# 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 $done.
todo="$state_dir"/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="$state_dir"/done
# The commit message that is planned to be used for any changes that
# need to be committed following a user interaction.
msg="$state_dir"/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 $count is the number of commits whose messages have been
# written to the file so far (including the initial "pick" commit).
# Each time that a commit message is processed, this line is read and
# updated. It is deleted just before the combined commit is made.
squash_msg="$state_dir"/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="$state_dir"/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
# $upstream. They are not necessarily rewritten, but their children
# might be. This ensures that commits on merged, but otherwise
# unrelated side branches are left alone. (Think "X" in the man page's
# example.)
rewritten="$state_dir"/rewritten
dropped="$state_dir"/dropped
# A script to set the GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and
# GIT_AUTHOR_DATE that will be used for the commit that is currently
# being rebased.
author_script="$state_dir"/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="$state_dir"/amend
# For the post-rewrite hook, we make a list of rewritten commits and
# their new sha1s. The rewritten-pending list keeps the sha1s of
# commits that have been processed, but not committed yet,
# e.g. because they are waiting for a 'squash' command.
rewritten_list="$state_dir"/rewritten-list
rewritten_pending="$state_dir"/rewritten-pending
GIT_CHERRY_PICK_HELP="$resolvemsg"
export GIT_CHERRY_PICK_HELP
warn () {
printf '%s\n' "$*" >&2
}
# Output the commit message for the specified commit.
commit_message () {
git cat-file commit "$1" | sed "1,/^$/d"
}
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 "$todo"
new_count=$(sane_grep -c '^[^#]' < "$done")
total=$(($new_count+$(sane_grep -c '^[^#]' < "$todo")))
if test "$last_count" != "$new_count"
then
last_count=$new_count
printf "Rebasing (%d/%d)\r" $new_count $total
test -z "$verbose" || echo
fi
}
append_todo_help () {
cat >> "$todo" << EOF
#
# Commands:
# p, pick = use commit
# r, reword = use commit, but edit the commit message
# e, edit = use commit, but stop for amending
# s, squash = use commit, but meld into previous commit
# f, fixup = like "squash", but discard this commit's log message
# x, exec = run command (the rest of the line) using shell
#
# These lines can be re-ordered; they are executed from top to bottom.
#
# If you remove a line here THAT COMMIT WILL BE LOST.
EOF
}
make_patch () {
sha1_and_parents="$(git rev-list --parents -1 "$1")"
case "$sha1_and_parents" in
?*' '?*' '?*)
git diff --cc $sha1_and_parents
;;
?*' '?*)
git diff-tree -p "$1^!"
;;
*)
echo "Root commit"
;;
esac > "$state_dir"/patch
test -f "$msg" ||
commit_message "$1" > "$msg"
test -f "$author_script" ||
get_author_ident_from_commit "$1" > "$author_script"
}
die_with_patch () {
echo "$1" > "$state_dir"/stopped-sha
make_patch "$1"
git rerere
die "$2"
}
exit_with_patch () {
echo "$1" > "$state_dir"/stopped-sha
make_patch $1
git rev-parse --verify HEAD > "$amend"
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 $2
}
die_abort () {
rm -rf "$state_dir"
die "$1"
}
has_action () {
sane_grep '^[^#]' "$1" >/dev/null
}
is_empty_commit() {
tree=$(git rev-parse -q --verify "$1"^{tree} 2>/dev/null ||
die "$1: not a commit that can be picked")
ptree=$(git rev-parse -q --verify "$1"^^{tree} 2>/dev/null ||
ptree=4b825dc642cb6eb9a060e54bf8d69288fbee4904)
test "$tree" = "$ptree"
}
# Run command with GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and
# GIT_AUTHOR_DATE exported from the current environment.
do_with_author () {
(
export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
"$@"
)
}
git_sequence_editor () {
if test -z "$GIT_SEQUENCE_EDITOR"
then
GIT_SEQUENCE_EDITOR="$(git config sequence.editor)"
if [ -z "$GIT_SEQUENCE_EDITOR" ]
then
GIT_SEQUENCE_EDITOR="$(git var GIT_EDITOR)" || return $?
fi
fi
eval "$GIT_SEQUENCE_EDITOR" '"$@"'
}
pick_one () {
ff=--ff
case "$1" in -n) sha1=$2; ff= ;; *) sha1=$1 ;; esac
case "$force_rebase" in '') ;; ?*) ff= ;; esac
output git rev-parse --verify $sha1 || die "Invalid commit name: $sha1"
if is_empty_commit "$sha1"
then
empty_args="--allow-empty"
fi
test -d "$rewritten" &&
pick_one_preserving_merges "$@" && return
output git cherry-pick $empty_args $ff "$@"
}
pick_one_preserving_merges () {
fast_forward=t
case "$1" in
-n)
fast_forward=f
sha1=$2
;;
*)
sha1=$1
;;
esac
sha1=$(git rev-parse $sha1)
if test -f "$state_dir"/current-commit
then
if test "$fast_forward" = t
then
while read current_commit
do
git rev-parse HEAD > "$rewritten"/$current_commit
done <"$state_dir"/current-commit
rm "$state_dir"/current-commit ||
die "Cannot write current commit's replacement sha1"
fi
fi
echo $sha1 >> "$state_dir"/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: $sha1"
# redo merge
author_script_content=$(get_author_ident_from_commit $sha1)
eval "$author_script_content"
msg_content="$(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 --no-ff ${strategy:+-s $strategy} -m \
"$msg_content" $new_parents
then
printf "%s\n" "$msg_content" > "$GIT_DIR"/MERGE_MSG
die_with_patch $sha1 "Error redoing merge $sha1"
fi
echo "$sha1 $(git rev-parse HEAD^0)" >> "$rewritten_list"
;;
*)
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 $1 ""
}
flush_rewritten_pending() {
test -s "$rewritten_pending" || return
newsha1="$(git rev-parse HEAD^0)"
sed "s/$/ $newsha1/" < "$rewritten_pending" >> "$rewritten_list"
rm -f "$rewritten_pending"
}
record_in_rewritten() {
oldsha1="$(git rev-parse $1)"
echo "$oldsha1" >> "$rewritten_pending"
case "$(peek_next_command)" in
squash|s|fixup|f)
;;
*)
flush_rewritten_pending
;;
esac
}
do_pick () {
if test "$(git rev-parse HEAD)" = "$squash_onto"
then
# Set the correct commit message and author info on the
# sentinel root before cherry-picking the original changes
# without committing (-n). Finally, update the sentinel again
# to include these changes. If the cherry-pick results in a
# conflict, this means our behaviour is similar to a standard
# failed cherry-pick during rebase, with a dirty index to
# resolve before manually running git commit --amend then git
# rebase --continue.
git commit --allow-empty --allow-empty-message --amend \
--no-post-rewrite -n -q -C $1 &&
pick_one -n $1 &&
git commit --allow-empty --allow-empty-message \
--amend --no-post-rewrite -n -q -C $1 ||
die_with_patch $1 "Could not apply $1... $2"
else
pick_one $1 ||
die_with_patch $1 "Could not apply $1... $2"
fi
}
do_next () {
rm -f "$msg" "$author_script" "$amend" || exit
read -r command sha1 rest < "$todo"
case "$command" in
'#'*|''|noop)
mark_action_done
;;
pick|p)
comment_for_reflog pick
mark_action_done
do_pick $sha1 "$rest"
record_in_rewritten $sha1
;;
reword|r)
comment_for_reflog reword
mark_action_done
do_pick $sha1 "$rest"
git commit --amend --no-post-rewrite || {
warn "Could not amend commit after successfully picking $sha1... $rest"
warn "This is most likely due to an empty commit message, or the pre-commit hook"
warn "failed. If the pre-commit hook failed, you may need to resolve the issue before"
warn "you are able to reword the commit."
exit_with_patch $sha1 1
}
record_in_rewritten $sha1
;;
edit|e)
comment_for_reflog edit
mark_action_done
do_pick $sha1 "$rest"
warn "Stopped at $sha1... $rest"
exit_with_patch $sha1 0
;;
squash|s|fixup|f)
case "$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 $sha1
author_script_content=$(get_author_ident_from_commit HEAD)
echo "$author_script_content" > "$author_script"
eval "$author_script_content"
if ! pick_one -n $sha1
then
git rev-parse --verify HEAD >"$amend"
die_failed_squash $sha1 "$rest"
fi
case "$(peek_next_command)" in
squash|s|fixup|f)
# This is an intermediate commit; its message will only be
# used in case of trouble. So use the long version:
do_with_author output git commit --amend --no-verify -F "$squash_msg" ||
die_failed_squash $sha1 "$rest"
;;
*)
# This is the final command of this squash/fixup group
if test -f "$fixup_msg"
then
do_with_author git commit --amend --no-verify -F "$fixup_msg" ||
die_failed_squash $sha1 "$rest"
else
cp "$squash_msg" "$GIT_DIR"/SQUASH_MSG || exit
rm -f "$GIT_DIR"/MERGE_MSG
do_with_author git commit --amend --no-verify -F "$GIT_DIR"/SQUASH_MSG -e ||
die_failed_squash $sha1 "$rest"
fi
rm -f "$squash_msg" "$fixup_msg"
;;
esac
record_in_rewritten $sha1
;;
x|"exec")
read -r command rest < "$todo"
mark_action_done
printf 'Executing: %s\n' "$rest"
# "exec" command doesn't take a sha1 in the todo-list.
# => can't just use $sha1 here.
git rev-parse --verify HEAD > "$state_dir"/stopped-sha
${SHELL:-@SHELL_PATH@} -c "$rest" # Actual execution
status=$?
# Run in subshell because require_clean_work_tree can die.
dirty=f
(require_clean_work_tree "rebase" 2>/dev/null) || dirty=t
if test "$status" -ne 0
then
warn "Execution failed: $rest"
test "$dirty" = f ||
warn "and made changes to the index and/or the working tree"
warn "You can fix the problem, and then run"
warn
warn " git rebase --continue"
warn
if test $status -eq 127 # command not found
then
status=1
fi
exit "$status"
elif test "$dirty" = t
then
warn "Execution succeeded: $rest"
warn "but left changes to the index and/or the working tree"
warn "Commit or stash your changes, and then run"
warn
warn " git rebase --continue"
warn
exit 1
fi
;;
*)
warn "Unknown command: $command $sha1 $rest"
fixtodo="Please fix this using 'git rebase --edit-todo'."
if git rev-parse --verify -q "$sha1" >/dev/null
then
die_with_patch $sha1 "$fixtodo"
else
die "$fixtodo"
fi
;;
esac
test -s "$todo" && return
comment_for_reflog finish &&
newhead=$(git rev-parse HEAD) &&
case $head_name in
refs/*)
message="$GIT_REFLOG_ACTION: $head_name onto $onto" &&
git update-ref -m "$message" $head_name $newhead $orig_head &&
git symbolic-ref \
-m "$GIT_REFLOG_ACTION: returning to $head_name" \
HEAD $head_name
;;
esac && {
test ! -f "$state_dir"/verbose ||
git diff-tree --stat $orig_head..HEAD
} &&
{
test -s "$rewritten_list" &&
git notes copy --for-rewrite=rebase < "$rewritten_list" ||
true # we don't care if this copying failed
} &&
if test -x "$GIT_DIR"/hooks/post-rewrite &&
test -s "$rewritten_list"; then
"$GIT_DIR"/hooks/post-rewrite rebase < "$rewritten_list"
true # we don't care if this hook failed
fi &&
rm -rf "$state_dir" &&
git gc --auto &&
warn "Successfully rebased and updated $head_name."
exit
}
do_rest () {
while :
do
do_next
done
}
# skip picking commits whose parents are unchanged
skip_unnecessary_picks () {
fd=3
git-rebase--interactive.sh: rework skip_unnecessary_picks Commit cd035b1c introduced the exec command to interactive rebase. In doing so, it modified the way that skip_unnecessary_picks iterates through the list of rebase commands so that it avoided collapsing multiple spaces into a single space. This is necessary for example if the argument to the exec command contains a path with multiple spaces in it. The way it did this was by reading each line of rebase commands into a single variable, and then breaking the individual components out using echo, sed, and cut. It used the individual broken-out components for decision making, and was still able to write the original line to the output file from the variable it had saved it in. But, since we only really need to look at anything other than the first element of the line when a 'pick' command is encountered, and even that is only necessary when we are still searching for "unnecessary" picks, and since newer rebase commands like 'exec' may not even require a sha1 field, let's make our read statement parse its input into a "command" variable, and a "rest" variable, and then only break out the sha1 from $rest, and call git-rev-parse, when absolutely necessary. I think this future proofs this subroutine, avoids calling git-rev-parse unnecessarily, and possibly with bogus arguments, and still accomplishes the goal of not mangling the $rest of the rebase command. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-13 20:47:34 +00:00
while read -r command rest
do
# fd=3 means we skip the command
git-rebase--interactive.sh: rework skip_unnecessary_picks Commit cd035b1c introduced the exec command to interactive rebase. In doing so, it modified the way that skip_unnecessary_picks iterates through the list of rebase commands so that it avoided collapsing multiple spaces into a single space. This is necessary for example if the argument to the exec command contains a path with multiple spaces in it. The way it did this was by reading each line of rebase commands into a single variable, and then breaking the individual components out using echo, sed, and cut. It used the individual broken-out components for decision making, and was still able to write the original line to the output file from the variable it had saved it in. But, since we only really need to look at anything other than the first element of the line when a 'pick' command is encountered, and even that is only necessary when we are still searching for "unnecessary" picks, and since newer rebase commands like 'exec' may not even require a sha1 field, let's make our read statement parse its input into a "command" variable, and a "rest" variable, and then only break out the sha1 from $rest, and call git-rev-parse, when absolutely necessary. I think this future proofs this subroutine, avoids calling git-rev-parse unnecessarily, and possibly with bogus arguments, and still accomplishes the goal of not mangling the $rest of the rebase command. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-13 20:47:34 +00:00
case "$fd,$command" in
3,pick|3,p)
# pick a commit whose parent is current $onto -> skip
sha1=${rest%% *}
git-rebase--interactive.sh: rework skip_unnecessary_picks Commit cd035b1c introduced the exec command to interactive rebase. In doing so, it modified the way that skip_unnecessary_picks iterates through the list of rebase commands so that it avoided collapsing multiple spaces into a single space. This is necessary for example if the argument to the exec command contains a path with multiple spaces in it. The way it did this was by reading each line of rebase commands into a single variable, and then breaking the individual components out using echo, sed, and cut. It used the individual broken-out components for decision making, and was still able to write the original line to the output file from the variable it had saved it in. But, since we only really need to look at anything other than the first element of the line when a 'pick' command is encountered, and even that is only necessary when we are still searching for "unnecessary" picks, and since newer rebase commands like 'exec' may not even require a sha1 field, let's make our read statement parse its input into a "command" variable, and a "rest" variable, and then only break out the sha1 from $rest, and call git-rev-parse, when absolutely necessary. I think this future proofs this subroutine, avoids calling git-rev-parse unnecessarily, and possibly with bogus arguments, and still accomplishes the goal of not mangling the $rest of the rebase command. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-13 20:47:34 +00:00
case "$(git rev-parse --verify --quiet "$sha1"^)" in
"$onto"*)
onto=$sha1
git-rebase--interactive.sh: rework skip_unnecessary_picks Commit cd035b1c introduced the exec command to interactive rebase. In doing so, it modified the way that skip_unnecessary_picks iterates through the list of rebase commands so that it avoided collapsing multiple spaces into a single space. This is necessary for example if the argument to the exec command contains a path with multiple spaces in it. The way it did this was by reading each line of rebase commands into a single variable, and then breaking the individual components out using echo, sed, and cut. It used the individual broken-out components for decision making, and was still able to write the original line to the output file from the variable it had saved it in. But, since we only really need to look at anything other than the first element of the line when a 'pick' command is encountered, and even that is only necessary when we are still searching for "unnecessary" picks, and since newer rebase commands like 'exec' may not even require a sha1 field, let's make our read statement parse its input into a "command" variable, and a "rest" variable, and then only break out the sha1 from $rest, and call git-rev-parse, when absolutely necessary. I think this future proofs this subroutine, avoids calling git-rev-parse unnecessarily, and possibly with bogus arguments, and still accomplishes the goal of not mangling the $rest of the rebase command. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-13 20:47:34 +00:00
;;
*)
fd=1
;;
esac
;;
git-rebase--interactive.sh: rework skip_unnecessary_picks Commit cd035b1c introduced the exec command to interactive rebase. In doing so, it modified the way that skip_unnecessary_picks iterates through the list of rebase commands so that it avoided collapsing multiple spaces into a single space. This is necessary for example if the argument to the exec command contains a path with multiple spaces in it. The way it did this was by reading each line of rebase commands into a single variable, and then breaking the individual components out using echo, sed, and cut. It used the individual broken-out components for decision making, and was still able to write the original line to the output file from the variable it had saved it in. But, since we only really need to look at anything other than the first element of the line when a 'pick' command is encountered, and even that is only necessary when we are still searching for "unnecessary" picks, and since newer rebase commands like 'exec' may not even require a sha1 field, let's make our read statement parse its input into a "command" variable, and a "rest" variable, and then only break out the sha1 from $rest, and call git-rev-parse, when absolutely necessary. I think this future proofs this subroutine, avoids calling git-rev-parse unnecessarily, and possibly with bogus arguments, and still accomplishes the goal of not mangling the $rest of the rebase command. Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-13 20:47:34 +00:00
3,#*|3,)
# copy comments
;;
*)
fd=1
;;
esac
printf '%s\n' "$command${rest:+ }$rest" >&$fd
done <"$todo" >"$todo.new" 3>>"$done" &&
mv -f "$todo".new "$todo" &&
case "$(peek_next_command)" in
squash|s|fixup|f)
record_in_rewritten "$onto"
;;
esac ||
die "Could not skip unnecessary pick commands"
}
# 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 () {
# extract fixup!/squash! lines and resolve any referenced sha1's
while read -r pick sha1 message
do
case "$message" in
"squash! "*|"fixup! "*)
action="${message%%!*}"
rest="${message#*! }"
echo "$sha1 $action $rest"
# if it's a single word, try to resolve to a full sha1 and
# emit a second copy. This allows us to match on both message
# and on sha1 prefix
if test "${rest#* }" = "$rest"; then
fullsha="$(git rev-parse -q --verify "$rest" 2>/dev/null)"
if test -n "$fullsha"; then
# prefix the action to uniquely identify this line as
# intended for full sha1 match
echo "$sha1 +$action $fullsha"
fi
fi
esac
done >"$1.sq" <"$1"
test -s "$1.sq" || return
used=
while read -r pick sha1 message
do
case " $used" in
*" $sha1 "*) continue ;;
esac
printf '%s\n' "$pick $sha1 $message"
used="$used$sha1 "
while read -r squash action msg_content
do
case " $used" in
*" $squash "*) continue ;;
esac
emit=0
case "$action" in
+*)
action="${action#+}"
# full sha1 prefix test
case "$msg_content" in "$sha1"*) emit=1;; esac ;;
*)
# message prefix test
case "$message" in "$msg_content"*) emit=1;; esac ;;
esac
if test $emit = 1; then
printf '%s\n' "$action $squash $action! $msg_content"
used="$used$squash "
fi
done <"$1.sq"
done >"$1.rearranged" <"$1"
cat "$1.rearranged" >"$1"
rm -f "$1.sq" "$1.rearranged"
}
# Add commands after a pick or after a squash/fixup serie
# in the todo list.
add_exec_commands () {
{
first=t
while read -r insn rest
do
case $insn in
pick)
test -n "$first" ||
printf "%s" "$cmd"
;;
esac
printf "%s %s\n" "$insn" "$rest"
first=
done
printf "%s" "$cmd"
} <"$1" >"$1.new" &&
mv "$1.new" "$1"
}
case "$action" in
continue)
# do we have anything to commit?
if git diff-index --cached --quiet HEAD --
then
: Nothing to commit -- skip this
else
if ! test -f "$author_script"
then
die "You have staged changes in your working tree. If these changes are meant to be
squashed into the previous commit, run:
git commit --amend
If they are meant to go into a new commit, run:
git commit
In both case, once you're done, continue with:
git rebase --continue
"
fi
. "$author_script" ||
die "Error trying to find the author identity to amend commit"
if test -f "$amend"
then
current_head=$(git rev-parse --verify HEAD)
test "$current_head" = $(cat "$amend") ||
die "\
You have uncommitted changes in your working tree. Please, commit them
first and then run 'git rebase --continue' again."
do_with_author git commit --amend --no-verify -F "$msg" -e ||
die "Could not commit staged changes."
else
do_with_author git commit --no-verify -F "$msg" -e ||
die "Could not commit staged changes."
fi
fi
record_in_rewritten "$(cat "$state_dir"/stopped-sha)"
require_clean_work_tree "rebase"
do_rest
;;
skip)
git rerere clear
do_rest
;;
edit-todo)
sed -e '/^#/d' < "$todo" > "$todo".new
mv -f "$todo".new "$todo"
append_todo_help
cat >> "$todo" << EOF
#
# You are editing the todo file of an ongoing interactive rebase.
# To continue rebase after editing, run:
# git rebase --continue
#
EOF
git_sequence_editor "$todo" ||
die "Could not execute editor"
exit
;;
esac
git var GIT_COMMITTER_IDENT >/dev/null ||
die "You need to set your committer info first"
comment_for_reflog start
if test ! -z "$switch_to"
then
output git checkout "$switch_to" -- ||
die "Could not checkout $switch_to"
fi
orig_head=$(git rev-parse --verify HEAD) || die "No HEAD?"
mkdir "$state_dir" || die "Could not create temporary $state_dir"
: > "$state_dir"/interactive || die "Could not mark as interactive"
write_basic_state
if test t = "$preserve_merges"
then
if test -z "$rebase_root"
then
mkdir "$rewritten" &&
for c in $(git merge-base --all $orig_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=
else
merges_option="--no-merges --cherry-pick"
fi
shorthead=$(git rev-parse --short $orig_head)
shortonto=$(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...$orig_head
shortrevisions=$shortupstream..$shorthead
else
revisions=$onto...$orig_head
shortrevisions=$shorthead
fi
git rev-list $merges_option --pretty=oneline --abbrev-commit \
--abbrev=7 --reverse --left-right --topo-order \
$revisions | \
sed -n "s/^>//p" |
while read -r shortsha1 rest
do
if test -z "$keep_empty" && is_empty_commit $shortsha1
then
comment_out="# "
else
comment_out=
fi
if test t != "$preserve_merges"
then
printf '%s\n' "${comment_out}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"/$p
then
preserve=f
fi
done
else
preserve=f
fi
if test f = "$preserve"
then
touch "$rewritten"/$sha1
printf '%s\n' "${comment_out}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 $revisions --left-right --cherry-pick | \
sed -n "s/^>//p" > "$state_dir"/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 "$rev" "$state_dir"/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 "$todo"
test -n "$cmd" && add_exec_commands "$todo"
cat >> "$todo" << EOF
# Rebase $shortrevisions onto $shortonto
EOF
append_todo_help
cat >> "$todo" << EOF
#
# However, if you remove everything, the rebase will be aborted.
#
EOF
if test -z "$keep_empty"
then
echo "# Note that empty commits are commented out" >>"$todo"
fi
has_action "$todo" ||
die_abort "Nothing to do"
cp "$todo" "$todo".backup
git_sequence_editor "$todo" ||
die_abort "Could not execute editor"
has_action "$todo" ||
die_abort "Nothing to do"
test -d "$rewritten" || test -n "$force_rebase" || skip_unnecessary_picks
output git checkout $onto || die_abort "could not detach HEAD"
git update-ref ORIG_HEAD $orig_head
do_rest