1#!/usr/bin/perl
2use 5.008;
4use strict;
5use warnings;
6use Git;
7binmode(STDOUT, ":raw");
9my $repo = Git->repository();
11my $menu_use_color = $repo->get_colorbool('color.interactive');
13my ($prompt_color, $header_color, $help_color) =
14 $menu_use_color ? (
15 $repo->get_color('color.interactive.prompt', 'bold blue'),
16 $repo->get_color('color.interactive.header', 'bold'),
17 $repo->get_color('color.interactive.help', 'red bold'),
18 ) : ();
19my $error_color = ();
20if ($menu_use_color) {
21 my $help_color_spec = ($repo->config('color.interactive.help') or
22 'red bold');
23 $error_color = $repo->get_color('color.interactive.error',
24 $help_color_spec);
25}
26my $diff_use_color = $repo->get_colorbool('color.diff');
28my ($fraginfo_color) =
29 $diff_use_color ? (
30 $repo->get_color('color.diff.frag', 'cyan'),
31 ) : ();
32my ($diff_plain_color) =
33 $diff_use_color ? (
34 $repo->get_color('color.diff.plain', ''),
35 ) : ();
36my ($diff_old_color) =
37 $diff_use_color ? (
38 $repo->get_color('color.diff.old', 'red'),
39 ) : ();
40my ($diff_new_color) =
41 $diff_use_color ? (
42 $repo->get_color('color.diff.new', 'green'),
43 ) : ();
44my $normal_color = $repo->get_color("", "reset");
46my $diff_algorithm = $repo->config('diff.algorithm');
48my $use_readkey = 0;
50my $use_termcap = 0;
51my %term_escapes;
52sub ReadMode;
54sub ReadKey;
55if ($repo->config_bool("interactive.singlekey")) {
56 eval {
57 require Term::ReadKey;
58 Term::ReadKey->import;
59 $use_readkey = 1;
60 };
61 eval {
62 require Term::Cap;
63 my $termcap = Term::Cap->Tgetent;
64 foreach (values %$termcap) {
65 $term_escapes{$_} = 1 if /^\e/;
66 }
67 $use_termcap = 1;
68 };
69}
70sub colored {
72 my $color = shift;
73 my $string = join("", @_);
74 if (defined $color) {
76 # Put a color code at the beginning of each line, a reset at the end
77 # color after newlines that are not at the end of the string
78 $string =~ s/(\n+)(.)/$1$color$2/g;
79 # reset before newlines
80 $string =~ s/(\n+)/$normal_color$1/g;
81 # codes at beginning and end (if necessary):
82 $string =~ s/^/$color/;
83 $string =~ s/$/$normal_color/ unless $string =~ /\n$/;
84 }
85 return $string;
86}
87# command line options
89my $patch_mode;
90my $patch_mode_revision;
91sub apply_patch;
93sub apply_patch_for_checkout_commit;
94sub apply_patch_for_stash;
95my %patch_modes = (
97 'stage' => {
98 DIFF => 'diff-files -p',
99 APPLY => sub { apply_patch 'apply --cached', @_; },
100 APPLY_CHECK => 'apply --cached',
101 VERB => 'Stage',
102 TARGET => '',
103 PARTICIPLE => 'staging',
104 FILTER => 'file-only',
105 IS_REVERSE => 0,
106 },
107 'stash' => {
108 DIFF => 'diff-index -p HEAD',
109 APPLY => sub { apply_patch 'apply --cached', @_; },
110 APPLY_CHECK => 'apply --cached',
111 VERB => 'Stash',
112 TARGET => '',
113 PARTICIPLE => 'stashing',
114 FILTER => undef,
115 IS_REVERSE => 0,
116 },
117 'reset_head' => {
118 DIFF => 'diff-index -p --cached',
119 APPLY => sub { apply_patch 'apply -R --cached', @_; },
120 APPLY_CHECK => 'apply -R --cached',
121 VERB => 'Unstage',
122 TARGET => '',
123 PARTICIPLE => 'unstaging',
124 FILTER => 'index-only',
125 IS_REVERSE => 1,
126 },
127 'reset_nothead' => {
128 DIFF => 'diff-index -R -p --cached',
129 APPLY => sub { apply_patch 'apply --cached', @_; },
130 APPLY_CHECK => 'apply --cached',
131 VERB => 'Apply',
132 TARGET => ' to index',
133 PARTICIPLE => 'applying',
134 FILTER => 'index-only',
135 IS_REVERSE => 0,
136 },
137 'checkout_index' => {
138 DIFF => 'diff-files -p',
139 APPLY => sub { apply_patch 'apply -R', @_; },
140 APPLY_CHECK => 'apply -R',
141 VERB => 'Discard',
142 TARGET => ' from worktree',
143 PARTICIPLE => 'discarding',
144 FILTER => 'file-only',
145 IS_REVERSE => 1,
146 },
147 'checkout_head' => {
148 DIFF => 'diff-index -p',
149 APPLY => sub { apply_patch_for_checkout_commit '-R', @_ },
150 APPLY_CHECK => 'apply -R',
151 VERB => 'Discard',
152 TARGET => ' from index and worktree',
153 PARTICIPLE => 'discarding',
154 FILTER => undef,
155 IS_REVERSE => 1,
156 },
157 'checkout_nothead' => {
158 DIFF => 'diff-index -R -p',
159 APPLY => sub { apply_patch_for_checkout_commit '', @_ },
160 APPLY_CHECK => 'apply',
161 VERB => 'Apply',
162 TARGET => ' to index and worktree',
163 PARTICIPLE => 'applying',
164 FILTER => undef,
165 IS_REVERSE => 0,
166 },
167);
168my %patch_mode_flavour = %{$patch_modes{stage}};
170sub run_cmd_pipe {
172 if ($^O eq 'MSWin32' || $^O eq 'msys') {
173 my @invalid = grep {m/[":*]/} @_;
174 die "$^O does not support: @invalid\n" if @invalid;
175 my @args = map { m/ /o ? "\"$_\"": $_ } @_;
176 return qx{@args};
177 } else {
178 my $fh = undef;
179 open($fh, '-|', @_) or die;
180 return <$fh>;
181 }
182}
183my ($GIT_DIR) = run_cmd_pipe(qw(git rev-parse --git-dir));
185if (!defined $GIT_DIR) {
187 exit(1); # rev-parse would have already said "not a git repo"
188}
189chomp($GIT_DIR);
190my %cquote_map = (
192 "b" => chr(8),
193 "t" => chr(9),
194 "n" => chr(10),
195 "v" => chr(11),
196 "f" => chr(12),
197 "r" => chr(13),
198 "\\" => "\\",
199 "\042" => "\042",
200);
201sub unquote_path {
203 local ($_) = @_;
204 my ($retval, $remainder);
205 if (!/^\042(.*)\042$/) {
206 return $_;
207 }
208 ($_, $retval) = ($1, "");
209 while (/^([^\\]*)\\(.*)$/) {
210 $remainder = $2;
211 $retval .= $1;
212 for ($remainder) {
213 if (/^([0-3][0-7][0-7])(.*)$/) {
214 $retval .= chr(oct($1));
215 $_ = $2;
216 last;
217 }
218 if (/^([\\\042btnvfr])(.*)$/) {
219 $retval .= $cquote_map{$1};
220 $_ = $2;
221 last;
222 }
223 # This is malformed -- just return it as-is for now.
224 return $_[0];
225 }
226 $_ = $remainder;
227 }
228 $retval .= $_;
229 return $retval;
230}
231sub refresh {
233 my $fh;
234 open $fh, 'git update-index --refresh |'
235 or die;
236 while (<$fh>) {
237 ;# ignore 'needs update'
238 }
239 close $fh;
240}
241sub list_untracked {
243 map {
244 chomp $_;
245 unquote_path($_);
246 }
247 run_cmd_pipe(qw(git ls-files --others --exclude-standard --), @ARGV);
248}
249my $status_fmt = '%12s %12s %s';
251my $status_head = sprintf($status_fmt, 'staged', 'unstaged', 'path');
252{
254 my $initial;
255 sub is_initial_commit {
256 $initial = system('git rev-parse HEAD -- >/dev/null 2>&1') != 0
257 unless defined $initial;
258 return $initial;
259 }
260}
261sub get_empty_tree {
263 return '4b825dc642cb6eb9a060e54bf8d69288fbee4904';
264}
265# Returns list of hashes, contents of each of which are:
267# VALUE: pathname
268# BINARY: is a binary path
269# INDEX: is index different from HEAD?
270# FILE: is file different from index?
271# INDEX_ADDDEL: is it add/delete between HEAD and index?
272# FILE_ADDDEL: is it add/delete between index and file?
273# UNMERGED: is the path unmerged
274sub list_modified {
276 my ($only) = @_;
277 my (%data, @return);
278 my ($add, $del, $adddel, $file);
279 my @tracked = ();
280 if (@ARGV) {
282 @tracked = map {
283 chomp $_;
284 unquote_path($_);
285 } run_cmd_pipe(qw(git ls-files --), @ARGV);
286 return if (!@tracked);
287 }
288 my $reference;
290 if (defined $patch_mode_revision and $patch_mode_revision ne 'HEAD') {
291 $reference = $patch_mode_revision;
292 } elsif (is_initial_commit()) {
293 $reference = get_empty_tree();
294 } else {
295 $reference = 'HEAD';
296 }
297 for (run_cmd_pipe(qw(git diff-index --cached
298 --numstat --summary), $reference,
299 '--', @tracked)) {
300 if (($add, $del, $file) =
301 /^([-\d]+) ([-\d]+) (.*)/) {
302 my ($change, $bin);
303 $file = unquote_path($file);
304 if ($add eq '-' && $del eq '-') {
305 $change = 'binary';
306 $bin = 1;
307 }
308 else {
309 $change = "+$add/-$del";
310 }
311 $data{$file} = {
312 INDEX => $change,
313 BINARY => $bin,
314 FILE => 'nothing',
315 }
316 }
317 elsif (($adddel, $file) =
318 /^ (create|delete) mode [0-7]+ (.*)$/) {
319 $file = unquote_path($file);
320 $data{$file}{INDEX_ADDDEL} = $adddel;
321 }
322 }
323 for (run_cmd_pipe(qw(git diff-files --numstat --summary --raw --), @tracked)) {
325 if (($add, $del, $file) =
326 /^([-\d]+) ([-\d]+) (.*)/) {
327 $file = unquote_path($file);
328 my ($change, $bin);
329 if ($add eq '-' && $del eq '-') {
330 $change = 'binary';
331 $bin = 1;
332 }
333 else {
334 $change = "+$add/-$del";
335 }
336 $data{$file}{FILE} = $change;
337 if ($bin) {
338 $data{$file}{BINARY} = 1;
339 }
340 }
341 elsif (($adddel, $file) =
342 /^ (create|delete) mode [0-7]+ (.*)$/) {
343 $file = unquote_path($file);
344 $data{$file}{FILE_ADDDEL} = $adddel;
345 }
346 elsif (/^:[0-7]+ [0-7]+ [0-9a-f]+ [0-9a-f]+ (.) (.*)$/) {
347 $file = unquote_path($2);
348 if (!exists $data{$file}) {
349 $data{$file} = +{
350 INDEX => 'unchanged',
351 BINARY => 0,
352 };
353 }
354 if ($1 eq 'U') {
355 $data{$file}{UNMERGED} = 1;
356 }
357 }
358 }
359 for (sort keys %data) {
361 my $it = $data{$_};
362 if ($only) {
364 if ($only eq 'index-only') {
365 next if ($it->{INDEX} eq 'unchanged');
366 }
367 if ($only eq 'file-only') {
368 next if ($it->{FILE} eq 'nothing');
369 }
370 }
371 push @return, +{
372 VALUE => $_,
373 %$it,
374 };
375 }
376 return @return;
377}
378sub find_unique {
380 my ($string, @stuff) = @_;
381 my $found = undef;
382 for (my $i = 0; $i < @stuff; $i++) {
383 my $it = $stuff[$i];
384 my $hit = undef;
385 if (ref $it) {
386 if ((ref $it) eq 'ARRAY') {
387 $it = $it->[0];
388 }
389 else {
390 $it = $it->{VALUE};
391 }
392 }
393 eval {
394 if ($it =~ /^$string/) {
395 $hit = 1;
396 };
397 };
398 if (defined $hit && defined $found) {
399 return undef;
400 }
401 if ($hit) {
402 $found = $i + 1;
403 }
404 }
405 return $found;
406}
407# inserts string into trie and updates count for each character
409sub update_trie {
410 my ($trie, $string) = @_;
411 foreach (split //, $string) {
412 $trie = $trie->{$_} ||= {COUNT => 0};
413 $trie->{COUNT}++;
414 }
415}
416# returns an array of tuples (prefix, remainder)
418sub find_unique_prefixes {
419 my @stuff = @_;
420 my @return = ();
421 # any single prefix exceeding the soft limit is omitted
423 # if any prefix exceeds the hard limit all are omitted
424 # 0 indicates no limit
425 my $soft_limit = 0;
426 my $hard_limit = 3;
427 # build a trie modelling all possible options
429 my %trie;
430 foreach my $print (@stuff) {
431 if ((ref $print) eq 'ARRAY') {
432 $print = $print->[0];
433 }
434 elsif ((ref $print) eq 'HASH') {
435 $print = $print->{VALUE};
436 }
437 update_trie(\%trie, $print);
438 push @return, $print;
439 }
440 # use the trie to find the unique prefixes
442 for (my $i = 0; $i < @return; $i++) {
443 my $ret = $return[$i];
444 my @letters = split //, $ret;
445 my %search = %trie;
446 my ($prefix, $remainder);
447 my $j;
448 for ($j = 0; $j < @letters; $j++) {
449 my $letter = $letters[$j];
450 if ($search{$letter}{COUNT} == 1) {
451 $prefix = substr $ret, 0, $j + 1;
452 $remainder = substr $ret, $j + 1;
453 last;
454 }
455 else {
456 my $prefix = substr $ret, 0, $j;
457 return ()
458 if ($hard_limit && $j + 1 > $hard_limit);
459 }
460 %search = %{$search{$letter}};
461 }
462 if (ord($letters[0]) > 127 ||
463 ($soft_limit && $j + 1 > $soft_limit)) {
464 $prefix = undef;
465 $remainder = $ret;
466 }
467 $return[$i] = [$prefix, $remainder];
468 }
469 return @return;
470}
471# filters out prefixes which have special meaning to list_and_choose()
473sub is_valid_prefix {
474 my $prefix = shift;
475 return (defined $prefix) &&
476 !($prefix =~ /[\s,]/) && # separators
477 !($prefix =~ /^-/) && # deselection
478 !($prefix =~ /^\d+/) && # selection
479 ($prefix ne '*') && # "all" wildcard
480 ($prefix ne '?'); # prompt help
481}
482# given a prefix/remainder tuple return a string with the prefix highlighted
484# for now use square brackets; later might use ANSI colors (underline, bold)
485sub highlight_prefix {
486 my $prefix = shift;
487 my $remainder = shift;
488 if (!defined $prefix) {
490 return $remainder;
491 }
492 if (!is_valid_prefix($prefix)) {
494 return "$prefix$remainder";
495 }
496 if (!$menu_use_color) {
498 return "[$prefix]$remainder";
499 }
500 return "$prompt_color$prefix$normal_color$remainder";
502}
503sub error_msg {
505 print STDERR colored $error_color, @_;
506}
507sub list_and_choose {
509 my ($opts, @stuff) = @_;
510 my (@chosen, @return);
511 my $i;
512 my @prefixes = find_unique_prefixes(@stuff) unless $opts->{LIST_ONLY};
513 TOPLOOP:
515 while (1) {
516 my $last_lf = 0;
517 if ($opts->{HEADER}) {
519 if (!$opts->{LIST_FLAT}) {
520 print " ";
521 }
522 print colored $header_color, "$opts->{HEADER}\n";
523 }
524 for ($i = 0; $i < @stuff; $i++) {
525 my $chosen = $chosen[$i] ? '*' : ' ';
526 my $print = $stuff[$i];
527 my $ref = ref $print;
528 my $highlighted = highlight_prefix(@{$prefixes[$i]})
529 if @prefixes;
530 if ($ref eq 'ARRAY') {
531 $print = $highlighted || $print->[0];
532 }
533 elsif ($ref eq 'HASH') {
534 my $value = $highlighted || $print->{VALUE};
535 $print = sprintf($status_fmt,
536 $print->{INDEX},
537 $print->{FILE},
538 $value);
539 }
540 else {
541 $print = $highlighted || $print;
542 }
543 printf("%s%2d: %s", $chosen, $i+1, $print);
544 if (($opts->{LIST_FLAT}) &&
545 (($i + 1) % ($opts->{LIST_FLAT}))) {
546 print "\t";
547 $last_lf = 0;
548 }
549 else {
550 print "\n";
551 $last_lf = 1;
552 }
553 }
554 if (!$last_lf) {
555 print "\n";
556 }
557 return if ($opts->{LIST_ONLY});
559 print colored $prompt_color, $opts->{PROMPT};
561 if ($opts->{SINGLETON}) {
562 print "> ";
563 }
564 else {
565 print ">> ";
566 }
567 my $line = <STDIN>;
568 if (!$line) {
569 print "\n";
570 $opts->{ON_EOF}->() if $opts->{ON_EOF};
571 last;
572 }
573 chomp $line;
574 last if $line eq '';
575 if ($line eq '?') {
576 $opts->{SINGLETON} ?
577 singleton_prompt_help_cmd() :
578 prompt_help_cmd();
579 next TOPLOOP;
580 }
581 for my $choice (split(/[\s,]+/, $line)) {
582 my $choose = 1;
583 my ($bottom, $top);
584 # Input that begins with '-'; unchoose
586 if ($choice =~ s/^-//) {
587 $choose = 0;
588 }
589 # A range can be specified like 5-7 or 5-.
590 if ($choice =~ /^(\d+)-(\d*)$/) {
591 ($bottom, $top) = ($1, length($2) ? $2 : 1 + @stuff);
592 }
593 elsif ($choice =~ /^\d+$/) {
594 $bottom = $top = $choice;
595 }
596 elsif ($choice eq '*') {
597 $bottom = 1;
598 $top = 1 + @stuff;
599 }
600 else {
601 $bottom = $top = find_unique($choice, @stuff);
602 if (!defined $bottom) {
603 error_msg "Huh ($choice)?\n";
604 next TOPLOOP;
605 }
606 }
607 if ($opts->{SINGLETON} && $bottom != $top) {
608 error_msg "Huh ($choice)?\n";
609 next TOPLOOP;
610 }
611 for ($i = $bottom-1; $i <= $top-1; $i++) {
612 next if (@stuff <= $i || $i < 0);
613 $chosen[$i] = $choose;
614 }
615 }
616 last if ($opts->{IMMEDIATE} || $line eq '*');
617 }
618 for ($i = 0; $i < @stuff; $i++) {
619 if ($chosen[$i]) {
620 push @return, $stuff[$i];
621 }
622 }
623 return @return;
624}
625sub singleton_prompt_help_cmd {
627 print colored $help_color, <<\EOF ;
628Prompt help:
6291 - select a numbered item
630foo - select item based on unique prefix
631 - (empty) select nothing
632EOF
633}
634sub prompt_help_cmd {
636 print colored $help_color, <<\EOF ;
637Prompt help:
6381 - select a single item
6393-5 - select a range of items
6402-3,6-9 - select multiple ranges
641foo - select item based on unique prefix
642-... - unselect specified items
643* - choose all items
644 - (empty) finish selecting
645EOF
646}
647sub status_cmd {
649 list_and_choose({ LIST_ONLY => 1, HEADER => $status_head },
650 list_modified());
651 print "\n";
652}
653sub say_n_paths {
655 my $did = shift @_;
656 my $cnt = scalar @_;
657 print "$did ";
658 if (1 < $cnt) {
659 print "$cnt paths\n";
660 }
661 else {
662 print "one path\n";
663 }
664}
665sub update_cmd {
667 my @mods = list_modified('file-only');
668 return if (!@mods);
669 my @update = list_and_choose({ PROMPT => 'Update',
671 HEADER => $status_head, },
672 @mods);
673 if (@update) {
674 system(qw(git update-index --add --remove --),
675 map { $_->{VALUE} } @update);
676 say_n_paths('updated', @update);
677 }
678 print "\n";
679}
680sub revert_cmd {
682 my @update = list_and_choose({ PROMPT => 'Revert',
683 HEADER => $status_head, },
684 list_modified());
685 if (@update) {
686 if (is_initial_commit()) {
687 system(qw(git rm --cached),
688 map { $_->{VALUE} } @update);
689 }
690 else {
691 my @lines = run_cmd_pipe(qw(git ls-tree HEAD --),
692 map { $_->{VALUE} } @update);
693 my $fh;
694 open $fh, '| git update-index --index-info'
695 or die;
696 for (@lines) {
697 print $fh $_;
698 }
699 close($fh);
700 for (@update) {
701 if ($_->{INDEX_ADDDEL} &&
702 $_->{INDEX_ADDDEL} eq 'create') {
703 system(qw(git update-index --force-remove --),
704 $_->{VALUE});
705 print "note: $_->{VALUE} is untracked now.\n";
706 }
707 }
708 }
709 refresh();
710 say_n_paths('reverted', @update);
711 }
712 print "\n";
713}
714sub add_untracked_cmd {
716 my @add = list_and_choose({ PROMPT => 'Add untracked' },
717 list_untracked());
718 if (@add) {
719 system(qw(git update-index --add --), @add);
720 say_n_paths('added', @add);
721 }
722 print "\n";
723}
724sub run_git_apply {
726 my $cmd = shift;
727 my $fh;
728 open $fh, '| git ' . $cmd . " --recount --allow-overlap";
729 print $fh @_;
730 return close $fh;
731}
732sub parse_diff {
734 my ($path) = @_;
735 my @diff_cmd = split(" ", $patch_mode_flavour{DIFF});
736 if (defined $diff_algorithm) {
737 splice @diff_cmd, 1, 0, "--diff-algorithm=${diff_algorithm}";
738 }
739 if (defined $patch_mode_revision) {
740 push @diff_cmd, $patch_mode_revision;
741 }
742 my @diff = run_cmd_pipe("git", @diff_cmd, "--", $path);
743 my @colored = ();
744 if ($diff_use_color) {
745 @colored = run_cmd_pipe("git", @diff_cmd, qw(--color --), $path);
746 }
747 my (@hunk) = { TEXT => [], DISPLAY => [], TYPE => 'header' };
748 for (my $i = 0; $i < @diff; $i++) {
750 if ($diff[$i] =~ /^@@ /) {
751 push @hunk, { TEXT => [], DISPLAY => [],
752 TYPE => 'hunk' };
753 }
754 push @{$hunk[-1]{TEXT}}, $diff[$i];
755 push @{$hunk[-1]{DISPLAY}},
756 ($diff_use_color ? $colored[$i] : $diff[$i]);
757 }
758 return @hunk;
759}
760sub parse_diff_header {
762 my $src = shift;
763 my $head = { TEXT => [], DISPLAY => [], TYPE => 'header' };
765 my $mode = { TEXT => [], DISPLAY => [], TYPE => 'mode' };
766 my $deletion = { TEXT => [], DISPLAY => [], TYPE => 'deletion' };
767 for (my $i = 0; $i < @{$src->{TEXT}}; $i++) {
769 my $dest =
770 $src->{TEXT}->[$i] =~ /^(old|new) mode (\d+)$/ ? $mode :
771 $src->{TEXT}->[$i] =~ /^deleted file/ ? $deletion :
772 $head;
773 push @{$dest->{TEXT}}, $src->{TEXT}->[$i];
774 push @{$dest->{DISPLAY}}, $src->{DISPLAY}->[$i];
775 }
776 return ($head, $mode, $deletion);
777}
778sub hunk_splittable {
780 my ($text) = @_;
781 my @s = split_hunk($text);
783 return (1 < @s);
784}
785sub parse_hunk_header {
787 my ($line) = @_;
788 my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) =
789 $line =~ /^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/;
790 $o_cnt = 1 unless defined $o_cnt;
791 $n_cnt = 1 unless defined $n_cnt;
792 return ($o_ofs, $o_cnt, $n_ofs, $n_cnt);
793}
794sub split_hunk {
796 my ($text, $display) = @_;
797 my @split = ();
798 if (!defined $display) {
799 $display = $text;
800 }
801 # If there are context lines in the middle of a hunk,
802 # it can be split, but we would need to take care of
803 # overlaps later.
804 my ($o_ofs, undef, $n_ofs) = parse_hunk_header($text->[0]);
806 my $hunk_start = 1;
807 OUTER:
809 while (1) {
810 my $next_hunk_start = undef;
811 my $i = $hunk_start - 1;
812 my $this = +{
813 TEXT => [],
814 DISPLAY => [],
815 TYPE => 'hunk',
816 OLD => $o_ofs,
817 NEW => $n_ofs,
818 OCNT => 0,
819 NCNT => 0,
820 ADDDEL => 0,
821 POSTCTX => 0,
822 USE => undef,
823 };
824 while (++$i < @$text) {
826 my $line = $text->[$i];
827 my $display = $display->[$i];
828 if ($line =~ /^ /) {
829 if ($this->{ADDDEL} &&
830 !defined $next_hunk_start) {
831 # We have seen leading context and
832 # adds/dels and then here is another
833 # context, which is trailing for this
834 # split hunk and leading for the next
835 # one.
836 $next_hunk_start = $i;
837 }
838 push @{$this->{TEXT}}, $line;
839 push @{$this->{DISPLAY}}, $display;
840 $this->{OCNT}++;
841 $this->{NCNT}++;
842 if (defined $next_hunk_start) {
843 $this->{POSTCTX}++;
844 }
845 next;
846 }
847 # add/del
849 if (defined $next_hunk_start) {
850 # We are done with the current hunk and
851 # this is the first real change for the
852 # next split one.
853 $hunk_start = $next_hunk_start;
854 $o_ofs = $this->{OLD} + $this->{OCNT};
855 $n_ofs = $this->{NEW} + $this->{NCNT};
856 $o_ofs -= $this->{POSTCTX};
857 $n_ofs -= $this->{POSTCTX};
858 push @split, $this;
859 redo OUTER;
860 }
861 push @{$this->{TEXT}}, $line;
862 push @{$this->{DISPLAY}}, $display;
863 $this->{ADDDEL}++;
864 if ($line =~ /^-/) {
865 $this->{OCNT}++;
866 }
867 else {
868 $this->{NCNT}++;
869 }
870 }
871 push @split, $this;
873 last;
874 }
875 for my $hunk (@split) {
877 $o_ofs = $hunk->{OLD};
878 $n_ofs = $hunk->{NEW};
879 my $o_cnt = $hunk->{OCNT};
880 my $n_cnt = $hunk->{NCNT};
881 my $head = ("@@ -$o_ofs" .
883 (($o_cnt != 1) ? ",$o_cnt" : '') .
884 " +$n_ofs" .
885 (($n_cnt != 1) ? ",$n_cnt" : '') .
886 " @@\n");
887 my $display_head = $head;
888 unshift @{$hunk->{TEXT}}, $head;
889 if ($diff_use_color) {
890 $display_head = colored($fraginfo_color, $head);
891 }
892 unshift @{$hunk->{DISPLAY}}, $display_head;
893 }
894 return @split;
895}
896sub find_last_o_ctx {
898 my ($it) = @_;
899 my $text = $it->{TEXT};
900 my ($o_ofs, $o_cnt) = parse_hunk_header($text->[0]);
901 my $i = @{$text};
902 my $last_o_ctx = $o_ofs + $o_cnt;
903 while (0 < --$i) {
904 my $line = $text->[$i];
905 if ($line =~ /^ /) {
906 $last_o_ctx--;
907 next;
908 }
909 last;
910 }
911 return $last_o_ctx;
912}
913sub merge_hunk {
915 my ($prev, $this) = @_;
916 my ($o0_ofs, $o0_cnt, $n0_ofs, $n0_cnt) =
917 parse_hunk_header($prev->{TEXT}[0]);
918 my ($o1_ofs, $o1_cnt, $n1_ofs, $n1_cnt) =
919 parse_hunk_header($this->{TEXT}[0]);
920 my (@line, $i, $ofs, $o_cnt, $n_cnt);
922 $ofs = $o0_ofs;
923 $o_cnt = $n_cnt = 0;
924 for ($i = 1; $i < @{$prev->{TEXT}}; $i++) {
925 my $line = $prev->{TEXT}[$i];
926 if ($line =~ /^\+/) {
927 $n_cnt++;
928 push @line, $line;
929 next;
930 }
931 last if ($o1_ofs <= $ofs);
933 $o_cnt++;
935 $ofs++;
936 if ($line =~ /^ /) {
937 $n_cnt++;
938 }
939 push @line, $line;
940 }
941 for ($i = 1; $i < @{$this->{TEXT}}; $i++) {
943 my $line = $this->{TEXT}[$i];
944 if ($line =~ /^\+/) {
945 $n_cnt++;
946 push @line, $line;
947 next;
948 }
949 $ofs++;
950 $o_cnt++;
951 if ($line =~ /^ /) {
952 $n_cnt++;
953 }
954 push @line, $line;
955 }
956 my $head = ("@@ -$o0_ofs" .
957 (($o_cnt != 1) ? ",$o_cnt" : '') .
958 " +$n0_ofs" .
959 (($n_cnt != 1) ? ",$n_cnt" : '') .
960 " @@\n");
961 @{$prev->{TEXT}} = ($head, @line);
962}
963sub coalesce_overlapping_hunks {
965 my (@in) = @_;
966 my @out = ();
967 my ($last_o_ctx, $last_was_dirty);
969 for (grep { $_->{USE} } @in) {
971 if ($_->{TYPE} ne 'hunk') {
972 push @out, $_;
973 next;
974 }
975 my $text = $_->{TEXT};
976 my ($o_ofs) = parse_hunk_header($text->[0]);
977 if (defined $last_o_ctx &&
978 $o_ofs <= $last_o_ctx &&
979 !$_->{DIRTY} &&
980 !$last_was_dirty) {
981 merge_hunk($out[-1], $_);
982 }
983 else {
984 push @out, $_;
985 }
986 $last_o_ctx = find_last_o_ctx($out[-1]);
987 $last_was_dirty = $_->{DIRTY};
988 }
989 return @out;
990}
991sub reassemble_patch {
993 my $head = shift;
994 my @patch;
995 # Include everything in the header except the beginning of the diff.
997 push @patch, (grep { !/^[-+]{3}/ } @$head);
998 # Then include any headers from the hunk lines, which must
1000 # come before any actual hunk.
1001 while (@_ && $_[0] !~ /^@/) {
1002 push @patch, shift;
1003 }
1004 # Then begin the diff.
1006 push @patch, grep { /^[-+]{3}/ } @$head;
1007 # And then the actual hunks.
1009 push @patch, @_;
1010 return @patch;
1012}
1013sub color_diff {
1015 return map {
1016 colored((/^@/ ? $fraginfo_color :
1017 /^\+/ ? $diff_new_color :
1018 /^-/ ? $diff_old_color :
1019 $diff_plain_color),
1020 $_);
1021 } @_;
1022}
1023sub edit_hunk_manually {
1025 my ($oldtext) = @_;
1026 my $hunkfile = $repo->repo_path . "/addp-hunk-edit.diff";
1028 my $fh;
1029 open $fh, '>', $hunkfile
1030 or die "failed to open hunk edit file for writing: " . $!;
1031 print $fh "# Manual hunk edit mode -- see bottom for a quick guide\n";
1032 print $fh @$oldtext;
1033 my $participle = $patch_mode_flavour{PARTICIPLE};
1034 my $is_reverse = $patch_mode_flavour{IS_REVERSE};
1035 my ($remove_plus, $remove_minus) = $is_reverse ? ('-', '+') : ('+', '-');
1036 print $fh <<EOF;
1037# ---
1038# To remove '$remove_minus' lines, make them ' ' lines (context).
1039# To remove '$remove_plus' lines, delete them.
1040# Lines starting with # will be removed.
1041#
1042# If the patch applies cleanly, the edited hunk will immediately be
1043# marked for $participle. If it does not apply cleanly, you will be given
1044# an opportunity to edit again. If all lines of the hunk are removed,
1045# then the edit is aborted and the hunk is left unchanged.
1046EOF
1047 close $fh;
1048 chomp(my $editor = run_cmd_pipe(qw(git var GIT_EDITOR)));
1050 system('sh', '-c', $editor.' "$@"', $editor, $hunkfile);
1051 if ($? != 0) {
1053 return undef;
1054 }
1055 open $fh, '<', $hunkfile
1057 or die "failed to open hunk edit file for reading: " . $!;
1058 my @newtext = grep { !/^#/ } <$fh>;
1059 close $fh;
1060 unlink $hunkfile;
1061 # Abort if nothing remains
1063 if (!grep { /\S/ } @newtext) {
1064 return undef;
1065 }
1066 # Reinsert the first hunk header if the user accidentally deleted it
1068 if ($newtext[0] !~ /^@/) {
1069 unshift @newtext, $oldtext->[0];
1070 }
1071 return \@newtext;
1072}
1073sub diff_applies {
1075 return run_git_apply($patch_mode_flavour{APPLY_CHECK} . ' --check',
1076 map { @{$_->{TEXT}} } @_);
1077}
1078sub _restore_terminal_and_die {
1080 ReadMode 'restore';
1081 print "\n";
1082 exit 1;
1083}
1084sub prompt_single_character {
1086 if ($use_readkey) {
1087 local $SIG{TERM} = \&_restore_terminal_and_die;
1088 local $SIG{INT} = \&_restore_terminal_and_die;
1089 ReadMode 'cbreak';
1090 my $key = ReadKey 0;
1091 ReadMode 'restore';
1092 if ($use_termcap and $key eq "\e") {
1093 while (!defined $term_escapes{$key}) {
1094 my $next = ReadKey 0.5;
1095 last if (!defined $next);
1096 $key .= $next;
1097 }
1098 $key =~ s/\e/^[/;
1099 }
1100 print "$key" if defined $key;
1101 print "\n";
1102 return $key;
1103 } else {
1104 return <STDIN>;
1105 }
1106}
1107sub prompt_yesno {
1109 my ($prompt) = @_;
1110 while (1) {
1111 print colored $prompt_color, $prompt;
1112 my $line = prompt_single_character;
1113 return 0 if $line =~ /^n/i;
1114 return 1 if $line =~ /^y/i;
1115 }
1116}
1117sub edit_hunk_loop {
1119 my ($head, $hunk, $ix) = @_;
1120 my $text = $hunk->[$ix]->{TEXT};
1121 while (1) {
1123 $text = edit_hunk_manually($text);
1124 if (!defined $text) {
1125 return undef;
1126 }
1127 my $newhunk = {
1128 TEXT => $text,
1129 TYPE => $hunk->[$ix]->{TYPE},
1130 USE => 1,
1131 DIRTY => 1,
1132 };
1133 if (diff_applies($head,
1134 @{$hunk}[0..$ix-1],
1135 $newhunk,
1136 @{$hunk}[$ix+1..$#{$hunk}])) {
1137 $newhunk->{DISPLAY} = [color_diff(@{$text})];
1138 return $newhunk;
1139 }
1140 else {
1141 prompt_yesno(
1142 'Your edited hunk does not apply. Edit again '
1143 . '(saying "no" discards!) [y/n]? '
1144 ) or return undef;
1145 }
1146 }
1147}
1148sub help_patch_cmd {
1150 my $verb = lc $patch_mode_flavour{VERB};
1151 my $target = $patch_mode_flavour{TARGET};
1152 print colored $help_color, <<EOF ;
1153y - $verb this hunk$target
1154n - do not $verb this hunk$target
1155q - quit; do not $verb this hunk nor any of the remaining ones
1156a - $verb this hunk and all later hunks in the file
1157d - do not $verb this hunk nor any of the later hunks in the file
1158g - select a hunk to go to
1159/ - search for a hunk matching the given regex
1160j - leave this hunk undecided, see next undecided hunk
1161J - leave this hunk undecided, see next hunk
1162k - leave this hunk undecided, see previous undecided hunk
1163K - leave this hunk undecided, see previous hunk
1164s - split the current hunk into smaller hunks
1165e - manually edit the current hunk
1166? - print help
1167EOF
1168}
1169sub apply_patch {
1171 my $cmd = shift;
1172 my $ret = run_git_apply $cmd, @_;
1173 if (!$ret) {
1174 print STDERR @_;
1175 }
1176 return $ret;
1177}
1178sub apply_patch_for_checkout_commit {
1180 my $reverse = shift;
1181 my $applies_index = run_git_apply 'apply '.$reverse.' --cached --check', @_;
1182 my $applies_worktree = run_git_apply 'apply '.$reverse.' --check', @_;
1183 if ($applies_worktree && $applies_index) {
1185 run_git_apply 'apply '.$reverse.' --cached', @_;
1186 run_git_apply 'apply '.$reverse, @_;
1187 return 1;
1188 } elsif (!$applies_index) {
1189 print colored $error_color, "The selected hunks do not apply to the index!\n";
1190 if (prompt_yesno "Apply them to the worktree anyway? ") {
1191 return run_git_apply 'apply '.$reverse, @_;
1192 } else {
1193 print colored $error_color, "Nothing was applied.\n";
1194 return 0;
1195 }
1196 } else {
1197 print STDERR @_;
1198 return 0;
1199 }
1200}
1201sub patch_update_cmd {
1203 my @all_mods = list_modified($patch_mode_flavour{FILTER});
1204 error_msg "ignoring unmerged: $_->{VALUE}\n"
1205 for grep { $_->{UNMERGED} } @all_mods;
1206 @all_mods = grep { !$_->{UNMERGED} } @all_mods;
1207 my @mods = grep { !($_->{BINARY}) } @all_mods;
1209 my @them;
1210 if (!@mods) {
1212 if (@all_mods) {
1213 print STDERR "Only binary files changed.\n";
1214 } else {
1215 print STDERR "No changes.\n";
1216 }
1217 return 0;
1218 }
1219 if ($patch_mode) {
1220 @them = @mods;
1221 }
1222 else {
1223 @them = list_and_choose({ PROMPT => 'Patch update',
1224 HEADER => $status_head, },
1225 @mods);
1226 }
1227 for (@them) {
1228 return 0 if patch_update_file($_->{VALUE});
1229 }
1230}
1231# Generate a one line summary of a hunk.
1233sub summarize_hunk {
1234 my $rhunk = shift;
1235 my $summary = $rhunk->{TEXT}[0];
1236 # Keep the line numbers, discard extra context.
1238 $summary =~ s/@@(.*?)@@.*/$1 /s;
1239 $summary .= " " x (20 - length $summary);
1240 # Add some user context.
1242 for my $line (@{$rhunk->{TEXT}}) {
1243 if ($line =~ m/^[+-].*\w/) {
1244 $summary .= $line;
1245 last;
1246 }
1247 }
1248 chomp $summary;
1250 return substr($summary, 0, 80) . "\n";
1251}
1252# Print a one-line summary of each hunk in the array ref in
1255# the first argument, starting with the index in the 2nd.
1256sub display_hunks {
1257 my ($hunks, $i) = @_;
1258 my $ctr = 0;
1259 $i ||= 0;
1260 for (; $i < @$hunks && $ctr < 20; $i++, $ctr++) {
1261 my $status = " ";
1262 if (defined $hunks->[$i]{USE}) {
1263 $status = $hunks->[$i]{USE} ? "+" : "-";
1264 }
1265 printf "%s%2d: %s",
1266 $status,
1267 $i + 1,
1268 summarize_hunk($hunks->[$i]);
1269 }
1270 return $i;
1271}
1272sub patch_update_file {
1274 my $quit = 0;
1275 my ($ix, $num);
1276 my $path = shift;
1277 my ($head, @hunk) = parse_diff($path);
1278 ($head, my $mode, my $deletion) = parse_diff_header($head);
1279 for (@{$head->{DISPLAY}}) {
1280 print;
1281 }
1282 if (@{$mode->{TEXT}}) {
1284 unshift @hunk, $mode;
1285 }
1286 if (@{$deletion->{TEXT}}) {
1287 foreach my $hunk (@hunk) {
1288 push @{$deletion->{TEXT}}, @{$hunk->{TEXT}};
1289 push @{$deletion->{DISPLAY}}, @{$hunk->{DISPLAY}};
1290 }
1291 @hunk = ($deletion);
1292 }
1293 $num = scalar @hunk;
1295 $ix = 0;
1296 while (1) {
1298 my ($prev, $next, $other, $undecided, $i);
1299 $other = '';
1300 if ($num <= $ix) {
1302 $ix = 0;
1303 }
1304 for ($i = 0; $i < $ix; $i++) {
1305 if (!defined $hunk[$i]{USE}) {
1306 $prev = 1;
1307 $other .= ',k';
1308 last;
1309 }
1310 }
1311 if ($ix) {
1312 $other .= ',K';
1313 }
1314 for ($i = $ix + 1; $i < $num; $i++) {
1315 if (!defined $hunk[$i]{USE}) {
1316 $next = 1;
1317 $other .= ',j';
1318 last;
1319 }
1320 }
1321 if ($ix < $num - 1) {
1322 $other .= ',J';
1323 }
1324 if ($num > 1) {
1325 $other .= ',g';
1326 }
1327 for ($i = 0; $i < $num; $i++) {
1328 if (!defined $hunk[$i]{USE}) {
1329 $undecided = 1;
1330 last;
1331 }
1332 }
1333 last if (!$undecided);
1334 if ($hunk[$ix]{TYPE} eq 'hunk' &&
1336 hunk_splittable($hunk[$ix]{TEXT})) {
1337 $other .= ',s';
1338 }
1339 if ($hunk[$ix]{TYPE} eq 'hunk') {
1340 $other .= ',e';
1341 }
1342 for (@{$hunk[$ix]{DISPLAY}}) {
1343 print;
1344 }
1345 print colored $prompt_color, $patch_mode_flavour{VERB},
1346 ($hunk[$ix]{TYPE} eq 'mode' ? ' mode change' :
1347 $hunk[$ix]{TYPE} eq 'deletion' ? ' deletion' :
1348 ' this hunk'),
1349 $patch_mode_flavour{TARGET},
1350 " [y,n,q,a,d,/$other,?]? ";
1351 my $line = prompt_single_character;
1352 if ($line) {
1353 if ($line =~ /^y/i) {
1354 $hunk[$ix]{USE} = 1;
1355 }
1356 elsif ($line =~ /^n/i) {
1357 $hunk[$ix]{USE} = 0;
1358 }
1359 elsif ($line =~ /^a/i) {
1360 while ($ix < $num) {
1361 if (!defined $hunk[$ix]{USE}) {
1362 $hunk[$ix]{USE} = 1;
1363 }
1364 $ix++;
1365 }
1366 next;
1367 }
1368 elsif ($other =~ /g/ && $line =~ /^g(.*)/) {
1369 my $response = $1;
1370 my $no = $ix > 10 ? $ix - 10 : 0;
1371 while ($response eq '') {
1372 my $extra = "";
1373 $no = display_hunks(\@hunk, $no);
1374 if ($no < $num) {
1375 $extra = " (<ret> to see more)";
1376 }
1377 print "go to which hunk$extra? ";
1378 $response = <STDIN>;
1379 if (!defined $response) {
1380 $response = '';
1381 }
1382 chomp $response;
1383 }
1384 if ($response !~ /^\s*\d+\s*$/) {
1385 error_msg "Invalid number: '$response'\n";
1386 } elsif (0 < $response && $response <= $num) {
1387 $ix = $response - 1;
1388 } else {
1389 error_msg "Sorry, only $num hunks available.\n";
1390 }
1391 next;
1392 }
1393 elsif ($line =~ /^d/i) {
1394 while ($ix < $num) {
1395 if (!defined $hunk[$ix]{USE}) {
1396 $hunk[$ix]{USE} = 0;
1397 }
1398 $ix++;
1399 }
1400 next;
1401 }
1402 elsif ($line =~ /^q/i) {
1403 for ($i = 0; $i < $num; $i++) {
1404 if (!defined $hunk[$i]{USE}) {
1405 $hunk[$i]{USE} = 0;
1406 }
1407 }
1408 $quit = 1;
1409 last;
1410 }
1411 elsif ($line =~ m|^/(.*)|) {
1412 my $regex = $1;
1413 if ($1 eq "") {
1414 print colored $prompt_color, "search for regex? ";
1415 $regex = <STDIN>;
1416 if (defined $regex) {
1417 chomp $regex;
1418 }
1419 }
1420 my $search_string;
1421 eval {
1422 $search_string = qr{$regex}m;
1423 };
1424 if ($@) {
1425 my ($err,$exp) = ($@, $1);
1426 $err =~ s/ at .*git-add--interactive line \d+, <STDIN> line \d+.*$//;
1427 error_msg "Malformed search regexp $exp: $err\n";
1428 next;
1429 }
1430 my $iy = $ix;
1431 while (1) {
1432 my $text = join ("", @{$hunk[$iy]{TEXT}});
1433 last if ($text =~ $search_string);
1434 $iy++;
1435 $iy = 0 if ($iy >= $num);
1436 if ($ix == $iy) {
1437 error_msg "No hunk matches the given pattern\n";
1438 last;
1439 }
1440 }
1441 $ix = $iy;
1442 next;
1443 }
1444 elsif ($line =~ /^K/) {
1445 if ($other =~ /K/) {
1446 $ix--;
1447 }
1448 else {
1449 error_msg "No previous hunk\n";
1450 }
1451 next;
1452 }
1453 elsif ($line =~ /^J/) {
1454 if ($other =~ /J/) {
1455 $ix++;
1456 }
1457 else {
1458 error_msg "No next hunk\n";
1459 }
1460 next;
1461 }
1462 elsif ($line =~ /^k/) {
1463 if ($other =~ /k/) {
1464 while (1) {
1465 $ix--;
1466 last if (!$ix ||
1467 !defined $hunk[$ix]{USE});
1468 }
1469 }
1470 else {
1471 error_msg "No previous hunk\n";
1472 }
1473 next;
1474 }
1475 elsif ($line =~ /^j/) {
1476 if ($other !~ /j/) {
1477 error_msg "No next hunk\n";
1478 next;
1479 }
1480 }
1481 elsif ($other =~ /s/ && $line =~ /^s/) {
1482 my @split = split_hunk($hunk[$ix]{TEXT}, $hunk[$ix]{DISPLAY});
1483 if (1 < @split) {
1484 print colored $header_color, "Split into ",
1485 scalar(@split), " hunks.\n";
1486 }
1487 splice (@hunk, $ix, 1, @split);
1488 $num = scalar @hunk;
1489 next;
1490 }
1491 elsif ($other =~ /e/ && $line =~ /^e/) {
1492 my $newhunk = edit_hunk_loop($head, \@hunk, $ix);
1493 if (defined $newhunk) {
1494 splice @hunk, $ix, 1, $newhunk;
1495 }
1496 }
1497 else {
1498 help_patch_cmd($other);
1499 next;
1500 }
1501 # soft increment
1502 while (1) {
1503 $ix++;
1504 last if ($ix >= $num ||
1505 !defined $hunk[$ix]{USE});
1506 }
1507 }
1508 }
1509 @hunk = coalesce_overlapping_hunks(@hunk);
1511 my $n_lofs = 0;
1513 my @result = ();
1514 for (@hunk) {
1515 if ($_->{USE}) {
1516 push @result, @{$_->{TEXT}};
1517 }
1518 }
1519 if (@result) {
1521 my @patch = reassemble_patch($head->{TEXT}, @result);
1522 my $apply_routine = $patch_mode_flavour{APPLY};
1523 &$apply_routine(@patch);
1524 refresh();
1525 }
1526 print "\n";
1528 return $quit;
1529}
1530sub diff_cmd {
1532 my @mods = list_modified('index-only');
1533 @mods = grep { !($_->{BINARY}) } @mods;
1534 return if (!@mods);
1535 my (@them) = list_and_choose({ PROMPT => 'Review diff',
1536 IMMEDIATE => 1,
1537 HEADER => $status_head, },
1538 @mods);
1539 return if (!@them);
1540 my $reference = is_initial_commit() ? get_empty_tree() : 'HEAD';
1541 system(qw(git diff -p --cached), $reference, '--',
1542 map { $_->{VALUE} } @them);
1543}
1544sub quit_cmd {
1546 print "Bye.\n";
1547 exit(0);
1548}
1549sub help_cmd {
1551 print colored $help_color, <<\EOF ;
1552status - show paths with changes
1553update - add working tree state to the staged set of changes
1554revert - revert staged set of changes back to the HEAD version
1555patch - pick hunks and update selectively
1556diff - view diff between HEAD and index
1557add untracked - add contents of untracked files to the staged set of changes
1558EOF
1559}
1560sub process_args {
1562 return unless @ARGV;
1563 my $arg = shift @ARGV;
1564 if ($arg =~ /--patch(?:=(.*))?/) {
1565 if (defined $1) {
1566 if ($1 eq 'reset') {
1567 $patch_mode = 'reset_head';
1568 $patch_mode_revision = 'HEAD';
1569 $arg = shift @ARGV or die "missing --";
1570 if ($arg ne '--') {
1571 $patch_mode_revision = $arg;
1572 $patch_mode = ($arg eq 'HEAD' ?
1573 'reset_head' : 'reset_nothead');
1574 $arg = shift @ARGV or die "missing --";
1575 }
1576 } elsif ($1 eq 'checkout') {
1577 $arg = shift @ARGV or die "missing --";
1578 if ($arg eq '--') {
1579 $patch_mode = 'checkout_index';
1580 } else {
1581 $patch_mode_revision = $arg;
1582 $patch_mode = ($arg eq 'HEAD' ?
1583 'checkout_head' : 'checkout_nothead');
1584 $arg = shift @ARGV or die "missing --";
1585 }
1586 } elsif ($1 eq 'stage' or $1 eq 'stash') {
1587 $patch_mode = $1;
1588 $arg = shift @ARGV or die "missing --";
1589 } else {
1590 die "unknown --patch mode: $1";
1591 }
1592 } else {
1593 $patch_mode = 'stage';
1594 $arg = shift @ARGV or die "missing --";
1595 }
1596 die "invalid argument $arg, expecting --"
1597 unless $arg eq "--";
1598 %patch_mode_flavour = %{$patch_modes{$patch_mode}};
1599 }
1600 elsif ($arg ne "--") {
1601 die "invalid argument $arg, expecting --";
1602 }
1603}
1604sub main_loop {
1606 my @cmd = ([ 'status', \&status_cmd, ],
1607 [ 'update', \&update_cmd, ],
1608 [ 'revert', \&revert_cmd, ],
1609 [ 'add untracked', \&add_untracked_cmd, ],
1610 [ 'patch', \&patch_update_cmd, ],
1611 [ 'diff', \&diff_cmd, ],
1612 [ 'quit', \&quit_cmd, ],
1613 [ 'help', \&help_cmd, ],
1614 );
1615 while (1) {
1616 my ($it) = list_and_choose({ PROMPT => 'What now',
1617 SINGLETON => 1,
1618 LIST_FLAT => 4,
1619 HEADER => '*** Commands ***',
1620 ON_EOF => \&quit_cmd,
1621 IMMEDIATE => 1 }, @cmd);
1622 if ($it) {
1623 eval {
1624 $it->[1]->();
1625 };
1626 if ($@) {
1627 print "$@";
1628 }
1629 }
1630 }
1631}
1632process_args();
1634refresh();
1635if ($patch_mode) {
1636 patch_update_cmd();
1637}
1638else {
1639 status_cmd();
1640 main_loop();
1641}