Andrew's git / gitweb.git / git-add--interactive.perl
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git-add--interactive.perlon commit send-email: 'References:' should only reference what is sent (15da108)
   1#!/usr/bin/perl -w
   2
   3use strict;
   4use Git;
   5
   6binmode(STDOUT, ":raw");
   7
   8my $repo = Git->repository();
   9
  10my $menu_use_color = $repo->get_colorbool('color.interactive');
  11my ($prompt_color, $header_color, $help_color) =
  12        $menu_use_color ? (
  13                $repo->get_color('color.interactive.prompt', 'bold blue'),
  14                $repo->get_color('color.interactive.header', 'bold'),
  15                $repo->get_color('color.interactive.help', 'red bold'),
  16        ) : ();
  17my $error_color = ();
  18if ($menu_use_color) {
  19        my $help_color_spec = ($repo->config('color.interactive.help') or
  20                                'red bold');
  21        $error_color = $repo->get_color('color.interactive.error',
  22                                        $help_color_spec);
  23}
  24
  25my $diff_use_color = $repo->get_colorbool('color.diff');
  26my ($fraginfo_color) =
  27        $diff_use_color ? (
  28                $repo->get_color('color.diff.frag', 'cyan'),
  29        ) : ();
  30my ($diff_plain_color) =
  31        $diff_use_color ? (
  32                $repo->get_color('color.diff.plain', ''),
  33        ) : ();
  34my ($diff_old_color) =
  35        $diff_use_color ? (
  36                $repo->get_color('color.diff.old', 'red'),
  37        ) : ();
  38my ($diff_new_color) =
  39        $diff_use_color ? (
  40                $repo->get_color('color.diff.new', 'green'),
  41        ) : ();
  42
  43my $normal_color = $repo->get_color("", "reset");
  44
  45my $use_readkey = 0;
  46sub ReadMode;
  47sub ReadKey;
  48if ($repo->config_bool("interactive.singlekey")) {
  49        eval {
  50                require Term::ReadKey;
  51                Term::ReadKey->import;
  52                $use_readkey = 1;
  53        };
  54}
  55
  56sub colored {
  57        my $color = shift;
  58        my $string = join("", @_);
  59
  60        if (defined $color) {
  61                # Put a color code at the beginning of each line, a reset at the end
  62                # color after newlines that are not at the end of the string
  63                $string =~ s/(\n+)(.)/$1$color$2/g;
  64                # reset before newlines
  65                $string =~ s/(\n+)/$normal_color$1/g;
  66                # codes at beginning and end (if necessary):
  67                $string =~ s/^/$color/;
  68                $string =~ s/$/$normal_color/ unless $string =~ /\n$/;
  69        }
  70        return $string;
  71}
  72
  73# command line options
  74my $patch_mode;
  75
  76sub run_cmd_pipe {
  77        if ($^O eq 'MSWin32' || $^O eq 'msys') {
  78                my @invalid = grep {m/[":*]/} @_;
  79                die "$^O does not support: @invalid\n" if @invalid;
  80                my @args = map { m/ /o ? "\"$_\"": $_ } @_;
  81                return qx{@args};
  82        } else {
  83                my $fh = undef;
  84                open($fh, '-|', @_) or die;
  85                return <$fh>;
  86        }
  87}
  88
  89my ($GIT_DIR) = run_cmd_pipe(qw(git rev-parse --git-dir));
  90
  91if (!defined $GIT_DIR) {
  92        exit(1); # rev-parse would have already said "not a git repo"
  93}
  94chomp($GIT_DIR);
  95
  96my %cquote_map = (
  97 "b" => chr(8),
  98 "t" => chr(9),
  99 "n" => chr(10),
 100 "v" => chr(11),
 101 "f" => chr(12),
 102 "r" => chr(13),
 103 "\\" => "\\",
 104 "\042" => "\042",
 105);
 106
 107sub unquote_path {
 108        local ($_) = @_;
 109        my ($retval, $remainder);
 110        if (!/^\042(.*)\042$/) {
 111                return $_;
 112        }
 113        ($_, $retval) = ($1, "");
 114        while (/^([^\\]*)\\(.*)$/) {
 115                $remainder = $2;
 116                $retval .= $1;
 117                for ($remainder) {
 118                        if (/^([0-3][0-7][0-7])(.*)$/) {
 119                                $retval .= chr(oct($1));
 120                                $_ = $2;
 121                                last;
 122                        }
 123                        if (/^([\\\042btnvfr])(.*)$/) {
 124                                $retval .= $cquote_map{$1};
 125                                $_ = $2;
 126                                last;
 127                        }
 128                        # This is malformed -- just return it as-is for now.
 129                        return $_[0];
 130                }
 131                $_ = $remainder;
 132        }
 133        $retval .= $_;
 134        return $retval;
 135}
 136
 137sub refresh {
 138        my $fh;
 139        open $fh, 'git update-index --refresh |'
 140            or die;
 141        while (<$fh>) {
 142                ;# ignore 'needs update'
 143        }
 144        close $fh;
 145}
 146
 147sub list_untracked {
 148        map {
 149                chomp $_;
 150                unquote_path($_);
 151        }
 152        run_cmd_pipe(qw(git ls-files --others --exclude-standard --), @ARGV);
 153}
 154
 155my $status_fmt = '%12s %12s %s';
 156my $status_head = sprintf($status_fmt, 'staged', 'unstaged', 'path');
 157
 158{
 159        my $initial;
 160        sub is_initial_commit {
 161                $initial = system('git rev-parse HEAD -- >/dev/null 2>&1') != 0
 162                        unless defined $initial;
 163                return $initial;
 164        }
 165}
 166
 167sub get_empty_tree {
 168        return '4b825dc642cb6eb9a060e54bf8d69288fbee4904';
 169}
 170
 171# Returns list of hashes, contents of each of which are:
 172# VALUE:        pathname
 173# BINARY:       is a binary path
 174# INDEX:        is index different from HEAD?
 175# FILE:         is file different from index?
 176# INDEX_ADDDEL: is it add/delete between HEAD and index?
 177# FILE_ADDDEL:  is it add/delete between index and file?
 178
 179sub list_modified {
 180        my ($only) = @_;
 181        my (%data, @return);
 182        my ($add, $del, $adddel, $file);
 183        my @tracked = ();
 184
 185        if (@ARGV) {
 186                @tracked = map {
 187                        chomp $_;
 188                        unquote_path($_);
 189                } run_cmd_pipe(qw(git ls-files --exclude-standard --), @ARGV);
 190                return if (!@tracked);
 191        }
 192
 193        my $reference = is_initial_commit() ? get_empty_tree() : 'HEAD';
 194        for (run_cmd_pipe(qw(git diff-index --cached
 195                             --numstat --summary), $reference,
 196                             '--', @tracked)) {
 197                if (($add, $del, $file) =
 198                    /^([-\d]+)  ([-\d]+)        (.*)/) {
 199                        my ($change, $bin);
 200                        $file = unquote_path($file);
 201                        if ($add eq '-' && $del eq '-') {
 202                                $change = 'binary';
 203                                $bin = 1;
 204                        }
 205                        else {
 206                                $change = "+$add/-$del";
 207                        }
 208                        $data{$file} = {
 209                                INDEX => $change,
 210                                BINARY => $bin,
 211                                FILE => 'nothing',
 212                        }
 213                }
 214                elsif (($adddel, $file) =
 215                       /^ (create|delete) mode [0-7]+ (.*)$/) {
 216                        $file = unquote_path($file);
 217                        $data{$file}{INDEX_ADDDEL} = $adddel;
 218                }
 219        }
 220
 221        for (run_cmd_pipe(qw(git diff-files --numstat --summary --), @tracked)) {
 222                if (($add, $del, $file) =
 223                    /^([-\d]+)  ([-\d]+)        (.*)/) {
 224                        $file = unquote_path($file);
 225                        if (!exists $data{$file}) {
 226                                $data{$file} = +{
 227                                        INDEX => 'unchanged',
 228                                        BINARY => 0,
 229                                };
 230                        }
 231                        my ($change, $bin);
 232                        if ($add eq '-' && $del eq '-') {
 233                                $change = 'binary';
 234                                $bin = 1;
 235                        }
 236                        else {
 237                                $change = "+$add/-$del";
 238                        }
 239                        $data{$file}{FILE} = $change;
 240                        if ($bin) {
 241                                $data{$file}{BINARY} = 1;
 242                        }
 243                }
 244                elsif (($adddel, $file) =
 245                       /^ (create|delete) mode [0-7]+ (.*)$/) {
 246                        $file = unquote_path($file);
 247                        $data{$file}{FILE_ADDDEL} = $adddel;
 248                }
 249        }
 250
 251        for (sort keys %data) {
 252                my $it = $data{$_};
 253
 254                if ($only) {
 255                        if ($only eq 'index-only') {
 256                                next if ($it->{INDEX} eq 'unchanged');
 257                        }
 258                        if ($only eq 'file-only') {
 259                                next if ($it->{FILE} eq 'nothing');
 260                        }
 261                }
 262                push @return, +{
 263                        VALUE => $_,
 264                        %$it,
 265                };
 266        }
 267        return @return;
 268}
 269
 270sub find_unique {
 271        my ($string, @stuff) = @_;
 272        my $found = undef;
 273        for (my $i = 0; $i < @stuff; $i++) {
 274                my $it = $stuff[$i];
 275                my $hit = undef;
 276                if (ref $it) {
 277                        if ((ref $it) eq 'ARRAY') {
 278                                $it = $it->[0];
 279                        }
 280                        else {
 281                                $it = $it->{VALUE};
 282                        }
 283                }
 284                eval {
 285                        if ($it =~ /^$string/) {
 286                                $hit = 1;
 287                        };
 288                };
 289                if (defined $hit && defined $found) {
 290                        return undef;
 291                }
 292                if ($hit) {
 293                        $found = $i + 1;
 294                }
 295        }
 296        return $found;
 297}
 298
 299# inserts string into trie and updates count for each character
 300sub update_trie {
 301        my ($trie, $string) = @_;
 302        foreach (split //, $string) {
 303                $trie = $trie->{$_} ||= {COUNT => 0};
 304                $trie->{COUNT}++;
 305        }
 306}
 307
 308# returns an array of tuples (prefix, remainder)
 309sub find_unique_prefixes {
 310        my @stuff = @_;
 311        my @return = ();
 312
 313        # any single prefix exceeding the soft limit is omitted
 314        # if any prefix exceeds the hard limit all are omitted
 315        # 0 indicates no limit
 316        my $soft_limit = 0;
 317        my $hard_limit = 3;
 318
 319        # build a trie modelling all possible options
 320        my %trie;
 321        foreach my $print (@stuff) {
 322                if ((ref $print) eq 'ARRAY') {
 323                        $print = $print->[0];
 324                }
 325                elsif ((ref $print) eq 'HASH') {
 326                        $print = $print->{VALUE};
 327                }
 328                update_trie(\%trie, $print);
 329                push @return, $print;
 330        }
 331
 332        # use the trie to find the unique prefixes
 333        for (my $i = 0; $i < @return; $i++) {
 334                my $ret = $return[$i];
 335                my @letters = split //, $ret;
 336                my %search = %trie;
 337                my ($prefix, $remainder);
 338                my $j;
 339                for ($j = 0; $j < @letters; $j++) {
 340                        my $letter = $letters[$j];
 341                        if ($search{$letter}{COUNT} == 1) {
 342                                $prefix = substr $ret, 0, $j + 1;
 343                                $remainder = substr $ret, $j + 1;
 344                                last;
 345                        }
 346                        else {
 347                                my $prefix = substr $ret, 0, $j;
 348                                return ()
 349                                    if ($hard_limit && $j + 1 > $hard_limit);
 350                        }
 351                        %search = %{$search{$letter}};
 352                }
 353                if (ord($letters[0]) > 127 ||
 354                    ($soft_limit && $j + 1 > $soft_limit)) {
 355                        $prefix = undef;
 356                        $remainder = $ret;
 357                }
 358                $return[$i] = [$prefix, $remainder];
 359        }
 360        return @return;
 361}
 362
 363# filters out prefixes which have special meaning to list_and_choose()
 364sub is_valid_prefix {
 365        my $prefix = shift;
 366        return (defined $prefix) &&
 367            !($prefix =~ /[\s,]/) && # separators
 368            !($prefix =~ /^-/) &&    # deselection
 369            !($prefix =~ /^\d+/) &&  # selection
 370            ($prefix ne '*') &&      # "all" wildcard
 371            ($prefix ne '?');        # prompt help
 372}
 373
 374# given a prefix/remainder tuple return a string with the prefix highlighted
 375# for now use square brackets; later might use ANSI colors (underline, bold)
 376sub highlight_prefix {
 377        my $prefix = shift;
 378        my $remainder = shift;
 379
 380        if (!defined $prefix) {
 381                return $remainder;
 382        }
 383
 384        if (!is_valid_prefix($prefix)) {
 385                return "$prefix$remainder";
 386        }
 387
 388        if (!$menu_use_color) {
 389                return "[$prefix]$remainder";
 390        }
 391
 392        return "$prompt_color$prefix$normal_color$remainder";
 393}
 394
 395sub error_msg {
 396        print STDERR colored $error_color, @_;
 397}
 398
 399sub list_and_choose {
 400        my ($opts, @stuff) = @_;
 401        my (@chosen, @return);
 402        my $i;
 403        my @prefixes = find_unique_prefixes(@stuff) unless $opts->{LIST_ONLY};
 404
 405      TOPLOOP:
 406        while (1) {
 407                my $last_lf = 0;
 408
 409                if ($opts->{HEADER}) {
 410                        if (!$opts->{LIST_FLAT}) {
 411                                print "     ";
 412                        }
 413                        print colored $header_color, "$opts->{HEADER}\n";
 414                }
 415                for ($i = 0; $i < @stuff; $i++) {
 416                        my $chosen = $chosen[$i] ? '*' : ' ';
 417                        my $print = $stuff[$i];
 418                        my $ref = ref $print;
 419                        my $highlighted = highlight_prefix(@{$prefixes[$i]})
 420                            if @prefixes;
 421                        if ($ref eq 'ARRAY') {
 422                                $print = $highlighted || $print->[0];
 423                        }
 424                        elsif ($ref eq 'HASH') {
 425                                my $value = $highlighted || $print->{VALUE};
 426                                $print = sprintf($status_fmt,
 427                                    $print->{INDEX},
 428                                    $print->{FILE},
 429                                    $value);
 430                        }
 431                        else {
 432                                $print = $highlighted || $print;
 433                        }
 434                        printf("%s%2d: %s", $chosen, $i+1, $print);
 435                        if (($opts->{LIST_FLAT}) &&
 436                            (($i + 1) % ($opts->{LIST_FLAT}))) {
 437                                print "\t";
 438                                $last_lf = 0;
 439                        }
 440                        else {
 441                                print "\n";
 442                                $last_lf = 1;
 443                        }
 444                }
 445                if (!$last_lf) {
 446                        print "\n";
 447                }
 448
 449                return if ($opts->{LIST_ONLY});
 450
 451                print colored $prompt_color, $opts->{PROMPT};
 452                if ($opts->{SINGLETON}) {
 453                        print "> ";
 454                }
 455                else {
 456                        print ">> ";
 457                }
 458                my $line = <STDIN>;
 459                if (!$line) {
 460                        print "\n";
 461                        $opts->{ON_EOF}->() if $opts->{ON_EOF};
 462                        last;
 463                }
 464                chomp $line;
 465                last if $line eq '';
 466                if ($line eq '?') {
 467                        $opts->{SINGLETON} ?
 468                            singleton_prompt_help_cmd() :
 469                            prompt_help_cmd();
 470                        next TOPLOOP;
 471                }
 472                for my $choice (split(/[\s,]+/, $line)) {
 473                        my $choose = 1;
 474                        my ($bottom, $top);
 475
 476                        # Input that begins with '-'; unchoose
 477                        if ($choice =~ s/^-//) {
 478                                $choose = 0;
 479                        }
 480                        # A range can be specified like 5-7 or 5-.
 481                        if ($choice =~ /^(\d+)-(\d*)$/) {
 482                                ($bottom, $top) = ($1, length($2) ? $2 : 1 + @stuff);
 483                        }
 484                        elsif ($choice =~ /^\d+$/) {
 485                                $bottom = $top = $choice;
 486                        }
 487                        elsif ($choice eq '*') {
 488                                $bottom = 1;
 489                                $top = 1 + @stuff;
 490                        }
 491                        else {
 492                                $bottom = $top = find_unique($choice, @stuff);
 493                                if (!defined $bottom) {
 494                                        error_msg "Huh ($choice)?\n";
 495                                        next TOPLOOP;
 496                                }
 497                        }
 498                        if ($opts->{SINGLETON} && $bottom != $top) {
 499                                error_msg "Huh ($choice)?\n";
 500                                next TOPLOOP;
 501                        }
 502                        for ($i = $bottom-1; $i <= $top-1; $i++) {
 503                                next if (@stuff <= $i || $i < 0);
 504                                $chosen[$i] = $choose;
 505                        }
 506                }
 507                last if ($opts->{IMMEDIATE} || $line eq '*');
 508        }
 509        for ($i = 0; $i < @stuff; $i++) {
 510                if ($chosen[$i]) {
 511                        push @return, $stuff[$i];
 512                }
 513        }
 514        return @return;
 515}
 516
 517sub singleton_prompt_help_cmd {
 518        print colored $help_color, <<\EOF ;
 519Prompt help:
 5201          - select a numbered item
 521foo        - select item based on unique prefix
 522           - (empty) select nothing
 523EOF
 524}
 525
 526sub prompt_help_cmd {
 527        print colored $help_color, <<\EOF ;
 528Prompt help:
 5291          - select a single item
 5303-5        - select a range of items
 5312-3,6-9    - select multiple ranges
 532foo        - select item based on unique prefix
 533-...       - unselect specified items
 534*          - choose all items
 535           - (empty) finish selecting
 536EOF
 537}
 538
 539sub status_cmd {
 540        list_and_choose({ LIST_ONLY => 1, HEADER => $status_head },
 541                        list_modified());
 542        print "\n";
 543}
 544
 545sub say_n_paths {
 546        my $did = shift @_;
 547        my $cnt = scalar @_;
 548        print "$did ";
 549        if (1 < $cnt) {
 550                print "$cnt paths\n";
 551        }
 552        else {
 553                print "one path\n";
 554        }
 555}
 556
 557sub update_cmd {
 558        my @mods = list_modified('file-only');
 559        return if (!@mods);
 560
 561        my @update = list_and_choose({ PROMPT => 'Update',
 562                                       HEADER => $status_head, },
 563                                     @mods);
 564        if (@update) {
 565                system(qw(git update-index --add --remove --),
 566                       map { $_->{VALUE} } @update);
 567                say_n_paths('updated', @update);
 568        }
 569        print "\n";
 570}
 571
 572sub revert_cmd {
 573        my @update = list_and_choose({ PROMPT => 'Revert',
 574                                       HEADER => $status_head, },
 575                                     list_modified());
 576        if (@update) {
 577                if (is_initial_commit()) {
 578                        system(qw(git rm --cached),
 579                                map { $_->{VALUE} } @update);
 580                }
 581                else {
 582                        my @lines = run_cmd_pipe(qw(git ls-tree HEAD --),
 583                                                 map { $_->{VALUE} } @update);
 584                        my $fh;
 585                        open $fh, '| git update-index --index-info'
 586                            or die;
 587                        for (@lines) {
 588                                print $fh $_;
 589                        }
 590                        close($fh);
 591                        for (@update) {
 592                                if ($_->{INDEX_ADDDEL} &&
 593                                    $_->{INDEX_ADDDEL} eq 'create') {
 594                                        system(qw(git update-index --force-remove --),
 595                                               $_->{VALUE});
 596                                        print "note: $_->{VALUE} is untracked now.\n";
 597                                }
 598                        }
 599                }
 600                refresh();
 601                say_n_paths('reverted', @update);
 602        }
 603        print "\n";
 604}
 605
 606sub add_untracked_cmd {
 607        my @add = list_and_choose({ PROMPT => 'Add untracked' },
 608                                  list_untracked());
 609        if (@add) {
 610                system(qw(git update-index --add --), @add);
 611                say_n_paths('added', @add);
 612        }
 613        print "\n";
 614}
 615
 616sub parse_diff {
 617        my ($path) = @_;
 618        my @diff = run_cmd_pipe(qw(git diff-files -p --), $path);
 619        my @colored = ();
 620        if ($diff_use_color) {
 621                @colored = run_cmd_pipe(qw(git diff-files -p --color --), $path);
 622        }
 623        my (@hunk) = { TEXT => [], DISPLAY => [] };
 624
 625        for (my $i = 0; $i < @diff; $i++) {
 626                if ($diff[$i] =~ /^@@ /) {
 627                        push @hunk, { TEXT => [], DISPLAY => [] };
 628                }
 629                push @{$hunk[-1]{TEXT}}, $diff[$i];
 630                push @{$hunk[-1]{DISPLAY}},
 631                        ($diff_use_color ? $colored[$i] : $diff[$i]);
 632        }
 633        return @hunk;
 634}
 635
 636sub parse_diff_header {
 637        my $src = shift;
 638
 639        my $head = { TEXT => [], DISPLAY => [] };
 640        my $mode = { TEXT => [], DISPLAY => [] };
 641
 642        for (my $i = 0; $i < @{$src->{TEXT}}; $i++) {
 643                my $dest = $src->{TEXT}->[$i] =~ /^(old|new) mode (\d+)$/ ?
 644                        $mode : $head;
 645                push @{$dest->{TEXT}}, $src->{TEXT}->[$i];
 646                push @{$dest->{DISPLAY}}, $src->{DISPLAY}->[$i];
 647        }
 648        return ($head, $mode);
 649}
 650
 651sub hunk_splittable {
 652        my ($text) = @_;
 653
 654        my @s = split_hunk($text);
 655        return (1 < @s);
 656}
 657
 658sub parse_hunk_header {
 659        my ($line) = @_;
 660        my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) =
 661            $line =~ /^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/;
 662        $o_cnt = 1 unless defined $o_cnt;
 663        $n_cnt = 1 unless defined $n_cnt;
 664        return ($o_ofs, $o_cnt, $n_ofs, $n_cnt);
 665}
 666
 667sub split_hunk {
 668        my ($text, $display) = @_;
 669        my @split = ();
 670        if (!defined $display) {
 671                $display = $text;
 672        }
 673        # If there are context lines in the middle of a hunk,
 674        # it can be split, but we would need to take care of
 675        # overlaps later.
 676
 677        my ($o_ofs, undef, $n_ofs) = parse_hunk_header($text->[0]);
 678        my $hunk_start = 1;
 679
 680      OUTER:
 681        while (1) {
 682                my $next_hunk_start = undef;
 683                my $i = $hunk_start - 1;
 684                my $this = +{
 685                        TEXT => [],
 686                        DISPLAY => [],
 687                        OLD => $o_ofs,
 688                        NEW => $n_ofs,
 689                        OCNT => 0,
 690                        NCNT => 0,
 691                        ADDDEL => 0,
 692                        POSTCTX => 0,
 693                        USE => undef,
 694                };
 695
 696                while (++$i < @$text) {
 697                        my $line = $text->[$i];
 698                        my $display = $display->[$i];
 699                        if ($line =~ /^ /) {
 700                                if ($this->{ADDDEL} &&
 701                                    !defined $next_hunk_start) {
 702                                        # We have seen leading context and
 703                                        # adds/dels and then here is another
 704                                        # context, which is trailing for this
 705                                        # split hunk and leading for the next
 706                                        # one.
 707                                        $next_hunk_start = $i;
 708                                }
 709                                push @{$this->{TEXT}}, $line;
 710                                push @{$this->{DISPLAY}}, $display;
 711                                $this->{OCNT}++;
 712                                $this->{NCNT}++;
 713                                if (defined $next_hunk_start) {
 714                                        $this->{POSTCTX}++;
 715                                }
 716                                next;
 717                        }
 718
 719                        # add/del
 720                        if (defined $next_hunk_start) {
 721                                # We are done with the current hunk and
 722                                # this is the first real change for the
 723                                # next split one.
 724                                $hunk_start = $next_hunk_start;
 725                                $o_ofs = $this->{OLD} + $this->{OCNT};
 726                                $n_ofs = $this->{NEW} + $this->{NCNT};
 727                                $o_ofs -= $this->{POSTCTX};
 728                                $n_ofs -= $this->{POSTCTX};
 729                                push @split, $this;
 730                                redo OUTER;
 731                        }
 732                        push @{$this->{TEXT}}, $line;
 733                        push @{$this->{DISPLAY}}, $display;
 734                        $this->{ADDDEL}++;
 735                        if ($line =~ /^-/) {
 736                                $this->{OCNT}++;
 737                        }
 738                        else {
 739                                $this->{NCNT}++;
 740                        }
 741                }
 742
 743                push @split, $this;
 744                last;
 745        }
 746
 747        for my $hunk (@split) {
 748                $o_ofs = $hunk->{OLD};
 749                $n_ofs = $hunk->{NEW};
 750                my $o_cnt = $hunk->{OCNT};
 751                my $n_cnt = $hunk->{NCNT};
 752
 753                my $head = ("@@ -$o_ofs" .
 754                            (($o_cnt != 1) ? ",$o_cnt" : '') .
 755                            " +$n_ofs" .
 756                            (($n_cnt != 1) ? ",$n_cnt" : '') .
 757                            " @@\n");
 758                my $display_head = $head;
 759                unshift @{$hunk->{TEXT}}, $head;
 760                if ($diff_use_color) {
 761                        $display_head = colored($fraginfo_color, $head);
 762                }
 763                unshift @{$hunk->{DISPLAY}}, $display_head;
 764        }
 765        return @split;
 766}
 767
 768
 769sub color_diff {
 770        return map {
 771                colored((/^@/  ? $fraginfo_color :
 772                         /^\+/ ? $diff_new_color :
 773                         /^-/  ? $diff_old_color :
 774                         $diff_plain_color),
 775                        $_);
 776        } @_;
 777}
 778
 779sub edit_hunk_manually {
 780        my ($oldtext) = @_;
 781
 782        my $hunkfile = $repo->repo_path . "/addp-hunk-edit.diff";
 783        my $fh;
 784        open $fh, '>', $hunkfile
 785                or die "failed to open hunk edit file for writing: " . $!;
 786        print $fh "# Manual hunk edit mode -- see bottom for a quick guide\n";
 787        print $fh @$oldtext;
 788        print $fh <<EOF;
 789# ---
 790# To remove '-' lines, make them ' ' lines (context).
 791# To remove '+' lines, delete them.
 792# Lines starting with # will be removed.
 793#
 794# If the patch applies cleanly, the edited hunk will immediately be
 795# marked for staging. If it does not apply cleanly, you will be given
 796# an opportunity to edit again. If all lines of the hunk are removed,
 797# then the edit is aborted and the hunk is left unchanged.
 798EOF
 799        close $fh;
 800
 801        my $editor = $ENV{GIT_EDITOR} || $repo->config("core.editor")
 802                || $ENV{VISUAL} || $ENV{EDITOR} || "vi";
 803        system('sh', '-c', $editor.' "$@"', $editor, $hunkfile);
 804
 805        if ($? != 0) {
 806                return undef;
 807        }
 808
 809        open $fh, '<', $hunkfile
 810                or die "failed to open hunk edit file for reading: " . $!;
 811        my @newtext = grep { !/^#/ } <$fh>;
 812        close $fh;
 813        unlink $hunkfile;
 814
 815        # Abort if nothing remains
 816        if (!grep { /\S/ } @newtext) {
 817                return undef;
 818        }
 819
 820        # Reinsert the first hunk header if the user accidentally deleted it
 821        if ($newtext[0] !~ /^@/) {
 822                unshift @newtext, $oldtext->[0];
 823        }
 824        return \@newtext;
 825}
 826
 827sub diff_applies {
 828        my $fh;
 829        open $fh, '| git apply --recount --cached --check';
 830        for my $h (@_) {
 831                print $fh @{$h->{TEXT}};
 832        }
 833        return close $fh;
 834}
 835
 836sub _restore_terminal_and_die {
 837        ReadMode 'restore';
 838        print "\n";
 839        exit 1;
 840}
 841
 842sub prompt_single_character {
 843        if ($use_readkey) {
 844                local $SIG{TERM} = \&_restore_terminal_and_die;
 845                local $SIG{INT} = \&_restore_terminal_and_die;
 846                ReadMode 'cbreak';
 847                my $key = ReadKey 0;
 848                ReadMode 'restore';
 849                print "$key" if defined $key;
 850                print "\n";
 851                return $key;
 852        } else {
 853                return <STDIN>;
 854        }
 855}
 856
 857sub prompt_yesno {
 858        my ($prompt) = @_;
 859        while (1) {
 860                print colored $prompt_color, $prompt;
 861                my $line = prompt_single_character;
 862                return 0 if $line =~ /^n/i;
 863                return 1 if $line =~ /^y/i;
 864        }
 865}
 866
 867sub edit_hunk_loop {
 868        my ($head, $hunk, $ix) = @_;
 869        my $text = $hunk->[$ix]->{TEXT};
 870
 871        while (1) {
 872                $text = edit_hunk_manually($text);
 873                if (!defined $text) {
 874                        return undef;
 875                }
 876                my $newhunk = { TEXT => $text, USE => 1 };
 877                if (diff_applies($head,
 878                                 @{$hunk}[0..$ix-1],
 879                                 $newhunk,
 880                                 @{$hunk}[$ix+1..$#{$hunk}])) {
 881                        $newhunk->{DISPLAY} = [color_diff(@{$text})];
 882                        return $newhunk;
 883                }
 884                else {
 885                        prompt_yesno(
 886                                'Your edited hunk does not apply. Edit again '
 887                                . '(saying "no" discards!) [y/n]? '
 888                                ) or return undef;
 889                }
 890        }
 891}
 892
 893sub help_patch_cmd {
 894        print colored $help_color, <<\EOF ;
 895y - stage this hunk
 896n - do not stage this hunk
 897a - stage this and all the remaining hunks in the file
 898d - do not stage this hunk nor any of the remaining hunks in the file
 899g - select a hunk to go to
 900/ - search for a hunk matching the given regex
 901j - leave this hunk undecided, see next undecided hunk
 902J - leave this hunk undecided, see next hunk
 903k - leave this hunk undecided, see previous undecided hunk
 904K - leave this hunk undecided, see previous hunk
 905s - split the current hunk into smaller hunks
 906e - manually edit the current hunk
 907? - print help
 908EOF
 909}
 910
 911sub patch_update_cmd {
 912        my @all_mods = list_modified('file-only');
 913        my @mods = grep { !($_->{BINARY}) } @all_mods;
 914        my @them;
 915
 916        if (!@mods) {
 917                if (@all_mods) {
 918                        print STDERR "Only binary files changed.\n";
 919                } else {
 920                        print STDERR "No changes.\n";
 921                }
 922                return 0;
 923        }
 924        if ($patch_mode) {
 925                @them = @mods;
 926        }
 927        else {
 928                @them = list_and_choose({ PROMPT => 'Patch update',
 929                                          HEADER => $status_head, },
 930                                        @mods);
 931        }
 932        for (@them) {
 933                patch_update_file($_->{VALUE});
 934        }
 935}
 936
 937# Generate a one line summary of a hunk.
 938sub summarize_hunk {
 939        my $rhunk = shift;
 940        my $summary = $rhunk->{TEXT}[0];
 941
 942        # Keep the line numbers, discard extra context.
 943        $summary =~ s/@@(.*?)@@.*/$1 /s;
 944        $summary .= " " x (20 - length $summary);
 945
 946        # Add some user context.
 947        for my $line (@{$rhunk->{TEXT}}) {
 948                if ($line =~ m/^[+-].*\w/) {
 949                        $summary .= $line;
 950                        last;
 951                }
 952        }
 953
 954        chomp $summary;
 955        return substr($summary, 0, 80) . "\n";
 956}
 957
 958
 959# Print a one-line summary of each hunk in the array ref in
 960# the first argument, starting wih the index in the 2nd.
 961sub display_hunks {
 962        my ($hunks, $i) = @_;
 963        my $ctr = 0;
 964        $i ||= 0;
 965        for (; $i < @$hunks && $ctr < 20; $i++, $ctr++) {
 966                my $status = " ";
 967                if (defined $hunks->[$i]{USE}) {
 968                        $status = $hunks->[$i]{USE} ? "+" : "-";
 969                }
 970                printf "%s%2d: %s",
 971                        $status,
 972                        $i + 1,
 973                        summarize_hunk($hunks->[$i]);
 974        }
 975        return $i;
 976}
 977
 978sub patch_update_file {
 979        my ($ix, $num);
 980        my $path = shift;
 981        my ($head, @hunk) = parse_diff($path);
 982        ($head, my $mode) = parse_diff_header($head);
 983        for (@{$head->{DISPLAY}}) {
 984                print;
 985        }
 986
 987        if (@{$mode->{TEXT}}) {
 988                while (1) {
 989                        print @{$mode->{DISPLAY}};
 990                        print colored $prompt_color,
 991                                "Stage mode change [y/n/a/d/?]? ";
 992                        my $line = prompt_single_character;
 993                        if ($line =~ /^y/i) {
 994                                $mode->{USE} = 1;
 995                                last;
 996                        }
 997                        elsif ($line =~ /^n/i) {
 998                                $mode->{USE} = 0;
 999                                last;
1000                        }
1001                        elsif ($line =~ /^a/i) {
1002                                $_->{USE} = 1 foreach ($mode, @hunk);
1003                                last;
1004                        }
1005                        elsif ($line =~ /^d/i) {
1006                                $_->{USE} = 0 foreach ($mode, @hunk);
1007                                last;
1008                        }
1009                        else {
1010                                help_patch_cmd('');
1011                                next;
1012                        }
1013                }
1014        }
1015
1016        $num = scalar @hunk;
1017        $ix = 0;
1018
1019        while (1) {
1020                my ($prev, $next, $other, $undecided, $i);
1021                $other = '';
1022
1023                if ($num <= $ix) {
1024                        $ix = 0;
1025                }
1026                for ($i = 0; $i < $ix; $i++) {
1027                        if (!defined $hunk[$i]{USE}) {
1028                                $prev = 1;
1029                                $other .= ',k';
1030                                last;
1031                        }
1032                }
1033                if ($ix) {
1034                        $other .= ',K';
1035                }
1036                for ($i = $ix + 1; $i < $num; $i++) {
1037                        if (!defined $hunk[$i]{USE}) {
1038                                $next = 1;
1039                                $other .= ',j';
1040                                last;
1041                        }
1042                }
1043                if ($ix < $num - 1) {
1044                        $other .= ',J';
1045                }
1046                if ($num > 1) {
1047                        $other .= ',g';
1048                }
1049                for ($i = 0; $i < $num; $i++) {
1050                        if (!defined $hunk[$i]{USE}) {
1051                                $undecided = 1;
1052                                last;
1053                        }
1054                }
1055                last if (!$undecided);
1056
1057                if (hunk_splittable($hunk[$ix]{TEXT})) {
1058                        $other .= ',s';
1059                }
1060                $other .= ',e';
1061                for (@{$hunk[$ix]{DISPLAY}}) {
1062                        print;
1063                }
1064                print colored $prompt_color, "Stage this hunk [y,n,a,d,/$other,?]? ";
1065                my $line = prompt_single_character;
1066                if ($line) {
1067                        if ($line =~ /^y/i) {
1068                                $hunk[$ix]{USE} = 1;
1069                        }
1070                        elsif ($line =~ /^n/i) {
1071                                $hunk[$ix]{USE} = 0;
1072                        }
1073                        elsif ($line =~ /^a/i) {
1074                                while ($ix < $num) {
1075                                        if (!defined $hunk[$ix]{USE}) {
1076                                                $hunk[$ix]{USE} = 1;
1077                                        }
1078                                        $ix++;
1079                                }
1080                                next;
1081                        }
1082                        elsif ($other =~ /g/ && $line =~ /^g(.*)/) {
1083                                my $response = $1;
1084                                my $no = $ix > 10 ? $ix - 10 : 0;
1085                                while ($response eq '') {
1086                                        my $extra = "";
1087                                        $no = display_hunks(\@hunk, $no);
1088                                        if ($no < $num) {
1089                                                $extra = " (<ret> to see more)";
1090                                        }
1091                                        print "go to which hunk$extra? ";
1092                                        $response = <STDIN>;
1093                                        if (!defined $response) {
1094                                                $response = '';
1095                                        }
1096                                        chomp $response;
1097                                }
1098                                if ($response !~ /^\s*\d+\s*$/) {
1099                                        error_msg "Invalid number: '$response'\n";
1100                                } elsif (0 < $response && $response <= $num) {
1101                                        $ix = $response - 1;
1102                                } else {
1103                                        error_msg "Sorry, only $num hunks available.\n";
1104                                }
1105                                next;
1106                        }
1107                        elsif ($line =~ /^d/i) {
1108                                while ($ix < $num) {
1109                                        if (!defined $hunk[$ix]{USE}) {
1110                                                $hunk[$ix]{USE} = 0;
1111                                        }
1112                                        $ix++;
1113                                }
1114                                next;
1115                        }
1116                        elsif ($line =~ m|^/(.*)|) {
1117                                my $regex = $1;
1118                                if ($1 eq "") {
1119                                        print colored $prompt_color, "search for regex? ";
1120                                        $regex = <STDIN>;
1121                                        if (defined $regex) {
1122                                                chomp $regex;
1123                                        }
1124                                }
1125                                my $search_string;
1126                                eval {
1127                                        $search_string = qr{$regex}m;
1128                                };
1129                                if ($@) {
1130                                        my ($err,$exp) = ($@, $1);
1131                                        $err =~ s/ at .*git-add--interactive line \d+, <STDIN> line \d+.*$//;
1132                                        error_msg "Malformed search regexp $exp: $err\n";
1133                                        next;
1134                                }
1135                                my $iy = $ix;
1136                                while (1) {
1137                                        my $text = join ("", @{$hunk[$iy]{TEXT}});
1138                                        last if ($text =~ $search_string);
1139                                        $iy++;
1140                                        $iy = 0 if ($iy >= $num);
1141                                        if ($ix == $iy) {
1142                                                error_msg "No hunk matches the given pattern\n";
1143                                                last;
1144                                        }
1145                                }
1146                                $ix = $iy;
1147                                next;
1148                        }
1149                        elsif ($line =~ /^K/) {
1150                                if ($other =~ /K/) {
1151                                        $ix--;
1152                                }
1153                                else {
1154                                        error_msg "No previous hunk\n";
1155                                }
1156                                next;
1157                        }
1158                        elsif ($line =~ /^J/) {
1159                                if ($other =~ /J/) {
1160                                        $ix++;
1161                                }
1162                                else {
1163                                        error_msg "No next hunk\n";
1164                                }
1165                                next;
1166                        }
1167                        elsif ($line =~ /^k/) {
1168                                if ($other =~ /k/) {
1169                                        while (1) {
1170                                                $ix--;
1171                                                last if (!$ix ||
1172                                                         !defined $hunk[$ix]{USE});
1173                                        }
1174                                }
1175                                else {
1176                                        error_msg "No previous hunk\n";
1177                                }
1178                                next;
1179                        }
1180                        elsif ($line =~ /^j/) {
1181                                if ($other !~ /j/) {
1182                                        error_msg "No next hunk\n";
1183                                        next;
1184                                }
1185                        }
1186                        elsif ($other =~ /s/ && $line =~ /^s/) {
1187                                my @split = split_hunk($hunk[$ix]{TEXT}, $hunk[$ix]{DISPLAY});
1188                                if (1 < @split) {
1189                                        print colored $header_color, "Split into ",
1190                                        scalar(@split), " hunks.\n";
1191                                }
1192                                splice (@hunk, $ix, 1, @split);
1193                                $num = scalar @hunk;
1194                                next;
1195                        }
1196                        elsif ($line =~ /^e/) {
1197                                my $newhunk = edit_hunk_loop($head, \@hunk, $ix);
1198                                if (defined $newhunk) {
1199                                        splice @hunk, $ix, 1, $newhunk;
1200                                }
1201                        }
1202                        else {
1203                                help_patch_cmd($other);
1204                                next;
1205                        }
1206                        # soft increment
1207                        while (1) {
1208                                $ix++;
1209                                last if ($ix >= $num ||
1210                                         !defined $hunk[$ix]{USE});
1211                        }
1212                }
1213        }
1214
1215        my $n_lofs = 0;
1216        my @result = ();
1217        if ($mode->{USE}) {
1218                push @result, @{$mode->{TEXT}};
1219        }
1220        for (@hunk) {
1221                if ($_->{USE}) {
1222                        push @result, @{$_->{TEXT}};
1223                }
1224        }
1225
1226        if (@result) {
1227                my $fh;
1228
1229                open $fh, '| git apply --cached --recount';
1230                for (@{$head->{TEXT}}, @result) {
1231                        print $fh $_;
1232                }
1233                if (!close $fh) {
1234                        for (@{$head->{TEXT}}, @result) {
1235                                print STDERR $_;
1236                        }
1237                }
1238                refresh();
1239        }
1240
1241        print "\n";
1242}
1243
1244sub diff_cmd {
1245        my @mods = list_modified('index-only');
1246        @mods = grep { !($_->{BINARY}) } @mods;
1247        return if (!@mods);
1248        my (@them) = list_and_choose({ PROMPT => 'Review diff',
1249                                     IMMEDIATE => 1,
1250                                     HEADER => $status_head, },
1251                                   @mods);
1252        return if (!@them);
1253        my $reference = is_initial_commit() ? get_empty_tree() : 'HEAD';
1254        system(qw(git diff -p --cached), $reference, '--',
1255                map { $_->{VALUE} } @them);
1256}
1257
1258sub quit_cmd {
1259        print "Bye.\n";
1260        exit(0);
1261}
1262
1263sub help_cmd {
1264        print colored $help_color, <<\EOF ;
1265status        - show paths with changes
1266update        - add working tree state to the staged set of changes
1267revert        - revert staged set of changes back to the HEAD version
1268patch         - pick hunks and update selectively
1269diff          - view diff between HEAD and index
1270add untracked - add contents of untracked files to the staged set of changes
1271EOF
1272}
1273
1274sub process_args {
1275        return unless @ARGV;
1276        my $arg = shift @ARGV;
1277        if ($arg eq "--patch") {
1278                $patch_mode = 1;
1279                $arg = shift @ARGV or die "missing --";
1280                die "invalid argument $arg, expecting --"
1281                    unless $arg eq "--";
1282        }
1283        elsif ($arg ne "--") {
1284                die "invalid argument $arg, expecting --";
1285        }
1286}
1287
1288sub main_loop {
1289        my @cmd = ([ 'status', \&status_cmd, ],
1290                   [ 'update', \&update_cmd, ],
1291                   [ 'revert', \&revert_cmd, ],
1292                   [ 'add untracked', \&add_untracked_cmd, ],
1293                   [ 'patch', \&patch_update_cmd, ],
1294                   [ 'diff', \&diff_cmd, ],
1295                   [ 'quit', \&quit_cmd, ],
1296                   [ 'help', \&help_cmd, ],
1297        );
1298        while (1) {
1299                my ($it) = list_and_choose({ PROMPT => 'What now',
1300                                             SINGLETON => 1,
1301                                             LIST_FLAT => 4,
1302                                             HEADER => '*** Commands ***',
1303                                             ON_EOF => \&quit_cmd,
1304                                             IMMEDIATE => 1 }, @cmd);
1305                if ($it) {
1306                        eval {
1307                                $it->[1]->();
1308                        };
1309                        if ($@) {
1310                                print "$@";
1311                        }
1312                }
1313        }
1314}
1315
1316process_args();
1317refresh();
1318if ($patch_mode) {
1319        patch_update_cmd();
1320}
1321else {
1322        status_cmd();
1323        main_loop();
1324}