Source

git / git-rebase--interactive.sh

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
#!/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"
}

is_merge_commit()
{
	git rev-parse --verify --quiet "$1"^2 >/dev/null 2>&1
}

# 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
	while read -r command rest
	do
		# fd=3 means we skip the command
		case "$fd,$command" in
		3,pick|3,p)
			# pick a commit whose parent is current $onto -> skip
			sha1=${rest%% *}
			case "$(git rev-parse --verify --quiet "$sha1"^)" in
			"$onto"*)
				onto=$sha1
				;;
			*)
				fd=1
				;;
			esac
			;;
		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 && ! is_merge_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
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.