git-remote.perl

   1 #!/usr/bin/perl -w
   2
   3 use strict;
   4 use Git;
   5 my $git = Git->repository();
   6
   7 sub add_remote_config {
   8         my ($hash, $name, $what, $value) = @_;
   9         if ($what eq 'url') {
  10                 # Having more than one is Ok -- it is used for push.
  11                 if (! exists $hash->{'URL'}) {
  12                         $hash->{$name}{'URL'} = $value;
  13                 }
  14         }
  15         elsif ($what eq 'fetch') {
  16                 $hash->{$name}{'FETCH'} ||= [];
  17                 push @{$hash->{$name}{'FETCH'}}, $value;
  18         }
  19         elsif ($what eq 'push') {
  20                 $hash->{$name}{'PUSH'} ||= [];
  21                 push @{$hash->{$name}{'PUSH'}}, $value;
  22         }
  23         if (!exists $hash->{$name}{'SOURCE'}) {
  24                 $hash->{$name}{'SOURCE'} = 'config';
  25         }
  26 }
  27
  28 sub add_remote_remotes {
  29         my ($hash, $file, $name) = @_;
  30
  31         if (exists $hash->{$name}) {
  32                 $hash->{$name}{'WARNING'} = 'ignored due to config';
  33                 return;
  34         }
  35
  36         my $fh;
  37         if (!open($fh, '<', $file)) {
  38                 print STDERR "Warning: cannot open $file\n";
  39                 return;
  40         }
  41         my $it = { 'SOURCE' => 'remotes' };
  42         $hash->{$name} = $it;
  43         while (<$fh>) {
  44                 chomp;
  45                 if (/^URL:\s*(.*)$/) {
  46                         # Having more than one is Ok -- it is used for push.
  47                         if (! exists $it->{'URL'}) {
  48                                 $it->{'URL'} = $1;
  49                         }
  50                 }
  51                 elsif (/^Push:\s*(.*)$/) {
  52                         $it->{'PUSH'} ||= [];
  53                         push @{$it->{'PUSH'}}, $1;
  54                 }
  55                 elsif (/^Pull:\s*(.*)$/) {
  56                         $it->{'FETCH'} ||= [];
  57                         push @{$it->{'FETCH'}}, $1;
  58                 }
  59                 elsif (/^\#/) {
  60                         ; # ignore
  61                 }
  62                 else {
  63                         print STDERR "Warning: funny line in $file: $_\n";
  64                 }
  65         }
  66         close($fh);
  67 }
  68
  69 sub list_remote {
  70         my ($git) = @_;
  71         my %seen = ();
  72         my @remotes = eval {
  73                 $git->command(qw(config --get-regexp), '^remote\.');
  74         };
  75         for (@remotes) {
  76                 if (/^remote\.(\S+?)\.([^.\s]+)\s+(.*)$/) {
  77                         add_remote_config(\%seen, $1, $2, $3);
  78                 }
  79         }
  80
  81         my $dir = $git->repo_path() . "/remotes";
  82         if (opendir(my $dh, $dir)) {
  83                 local $_;
  84                 while ($_ = readdir($dh)) {
  85                         chomp;
  86                         next if (! -f "$dir/$_" || ! -r _);
  87                         add_remote_remotes(\%seen, "$dir/$_", $_);
  88                 }
  89         }
  90
  91         return \%seen;
  92 }
  93
  94 sub add_branch_config {
  95         my ($hash, $name, $what, $value) = @_;
  96         if ($what eq 'remote') {
  97                 if (exists $hash->{$name}{'REMOTE'}) {
  98                         print STDERR "Warning: more than one branch.$name.remote\n";
  99                 }
 100                 $hash->{$name}{'REMOTE'} = $value;
 101         }
 102         elsif ($what eq 'merge') {
 103                 $hash->{$name}{'MERGE'} ||= [];
 104                 push @{$hash->{$name}{'MERGE'}}, $value;
 105         }
 106 }
 107
 108 sub list_branch {
 109         my ($git) = @_;
 110         my %seen = ();
 111         my @branches = eval {
 112                 $git->command(qw(config --get-regexp), '^branch\.');
 113         };
 114         for (@branches) {
 115                 if (/^branch\.([^.]*)\.(\S*)\s+(.*)$/) {
 116                         add_branch_config(\%seen, $1, $2, $3);
 117                 }
 118         }
 119
 120         return \%seen;
 121 }
 122
 123 my $remote = list_remote($git);
 124 my $branch = list_branch($git);
 125
 126 sub update_ls_remote {
 127         my ($harder, $info) = @_;
 128
 129         return if (($harder == 0) ||
 130                    (($harder == 1) && exists $info->{'LS_REMOTE'}));
 131
 132         my @ref = map {
 133                 s|^[0-9a-f]{40}\s+refs/heads/||;
 134                 $_;
 135         } $git->command(qw(ls-remote --heads), $info->{'URL'});
 136         $info->{'LS_REMOTE'} = \@ref;
 137 }
 138
 139 sub list_wildcard_mapping {
 140         my ($forced, $ours, $ls) = @_;
 141         my %refs;
 142         for (@$ls) {
 143                 $refs{$_} = 01; # bit #0 to say "they have"
 144         }
 145         for ($git->command('for-each-ref', "refs/remotes/$ours")) {
 146                 chomp;
 147                 next unless (s|^[0-9a-f]{40}\s[a-z]+\srefs/remotes/$ours/||);
 148                 next if ($_ eq 'HEAD');
 149                 $refs{$_} ||= 0;
 150                 $refs{$_} |= 02; # bit #1 to say "we have"
 151         }
 152         my (@new, @stale, @tracked);
 153         for (sort keys %refs) {
 154                 my $have = $refs{$_};
 155                 if ($have == 1) {
 156                         push @new, $_;
 157                 }
 158                 elsif ($have == 2) {
 159                         push @stale, $_;
 160                 }
 161                 elsif ($have == 3) {
 162                         push @tracked, $_;
 163                 }
 164         }
 165         return \@new, \@stale, \@tracked;
 166 }
 167
 168 sub list_mapping {
 169         my ($name, $info) = @_;
 170         my $fetch = $info->{'FETCH'};
 171         my $ls = $info->{'LS_REMOTE'};
 172         my (@new, @stale, @tracked);
 173
 174         for (@$fetch) {
 175                 next unless (/(\+)?([^:]+):(.*)/);
 176                 my ($forced, $theirs, $ours) = ($1, $2, $3);
 177                 if ($theirs eq 'refs/heads/*' &&
 178                     $ours =~ /^refs\/remotes\/(.*)\/\*$/) {
 179                         # wildcard mapping
 180                         my ($w_new, $w_stale, $w_tracked)
 181                                 = list_wildcard_mapping($forced, $1, $ls);
 182                         push @new, @$w_new;
 183                         push @stale, @$w_stale;
 184                         push @tracked, @$w_tracked;
 185                 }
 186                 elsif ($theirs =~ /\*/ || $ours =~ /\*/) {
 187                         print STDERR "Warning: unrecognized mapping in remotes.$name.fetch: $_\n";
 188                 }
 189                 elsif ($theirs =~ s|^refs/heads/||) {
 190                         if (!grep { $_ eq $theirs } @$ls) {
 191                                 push @stale, $theirs;
 192                         }
 193                         elsif ($ours ne '') {
 194                                 push @tracked, $theirs;
 195                         }
 196                 }
 197         }
 198         return \@new, \@stale, \@tracked;
 199 }
 200
 201 sub show_mapping {
 202         my ($name, $info) = @_;
 203         my ($new, $stale, $tracked) = list_mapping($name, $info);
 204         if (@$new) {
 205                 print "  New remote branches (next fetch will store in remotes/$name)\n";
 206                 print "    @$new\n";
 207         }
 208         if (@$stale) {
 209                 print "  Stale tracking branches in remotes/$name (use 'git remote prune')\n";
 210                 print "    @$stale\n";
 211         }
 212         if (@$tracked) {
 213                 print "  Tracked remote branches\n";
 214                 print "    @$tracked\n";
 215         }
 216 }
 217
 218 sub prune_remote {
 219         my ($name, $ls_remote) = @_;
 220         if (!exists $remote->{$name}) {
 221                 print STDERR "No such remote $name\n";
 222                 return 1;
 223         }
 224         my $info = $remote->{$name};
 225         update_ls_remote($ls_remote, $info);
 226
 227         my ($new, $stale, $tracked) = list_mapping($name, $info);
 228         my $prefix = "refs/remotes/$name";
 229         foreach my $to_prune (@$stale) {
 230                 my @v = $git->command(qw(rev-parse --verify), "$prefix/$to_prune");
 231                 $git->command(qw(update-ref -d), "$prefix/$to_prune", $v[0]);
 232         }
 233         return 0;
 234 }
 235
 236 sub show_remote {
 237         my ($name, $ls_remote) = @_;
 238         if (!exists $remote->{$name}) {
 239                 print STDERR "No such remote $name\n";
 240                 return 1;
 241         }
 242         my $info = $remote->{$name};
 243         update_ls_remote($ls_remote, $info);
 244
 245         print "* remote $name\n";
 246         print "  URL: $info->{'URL'}\n";
 247         for my $branchname (sort keys %$branch) {
 248                 next unless (defined $branch->{$branchname}{'REMOTE'} &&
 249                              $branch->{$branchname}{'REMOTE'} eq $name);
 250                 my @merged = map {
 251                         s|^refs/heads/||;
 252                         $_;
 253                 } split(' ',"@{$branch->{$branchname}{'MERGE'}}");
 254                 next unless (@merged);
 255                 print "  Remote branch(es) merged with 'git pull' while on branch $branchname\n";
 256                 print "    @merged\n";
 257         }
 258         if ($info->{'LS_REMOTE'}) {
 259                 show_mapping($name, $info);
 260         }
 261         if ($info->{'PUSH'}) {
 262                 my @pushed = map {
 263                         s|^refs/heads/||;
 264                         s|^\+refs/heads/|+|;
 265                         s|:refs/heads/|:|;
 266                         $_;
 267                 } @{$info->{'PUSH'}};
 268                 print "  Local branch(es) pushed with 'git push'\n";
 269                 print "    @pushed\n";
 270         }
 271         return 0;
 272 }
 273
 274 sub add_remote {
 275         my ($name, $url, $opts) = @_;
 276         if (exists $remote->{$name}) {
 277                 print STDERR "remote $name already exists.\n";
 278                 exit(1);
 279         }
 280         $git->command('config', "remote.$name.url", $url);
 281         my $track = $opts->{'track'} || ["*"];
 282
 283         for (@$track) {
 284                 $git->command('config', '--add', "remote.$name.fetch",
 285                                 $opts->{'mirror'} ?
 286                                 "+refs/$_:refs/$_" :
 287                                 "+refs/heads/$_:refs/remotes/$name/$_");
 288         }
 289         if ($opts->{'fetch'}) {
 290                 $git->command('fetch', $name);
 291         }
 292         if (exists $opts->{'master'}) {
 293                 $git->command('symbolic-ref', "refs/remotes/$name/HEAD",
 294                               "refs/remotes/$name/$opts->{'master'}");
 295         }
 296 }
 297
 298 sub update_remote {
 299         my ($name) = @_;
 300         my @remotes;
 301
 302         my $conf = $git->config("remotes." . $name);
 303         if (defined($conf)) {
 304                 @remotes = split(' ', $conf);
 305         } elsif ($name eq 'default') {
 306                 @remotes = ();
 307                 for (sort keys %$remote) {
 308                         my $do_fetch = $git->config_bool("remote." . $_ .
 309                                                     ".skipDefaultUpdate");
 310                         unless ($do_fetch) {
 311                                 push @remotes, $_;
 312                         }
 313                 }
 314         } else {
 315                 print STDERR "Remote group $name does not exists.\n";
 316                 exit(1);
 317         }
 318         for (@remotes) {
 319                 print "Updating $_\n";
 320                 $git->command('fetch', "$_");
 321         }
 322 }
 323
 324 sub rm_remote {
 325         my ($name) = @_;
 326         if (!exists $remote->{$name}) {
 327                 print STDERR "No such remote $name\n";
 328                 return 1;
 329         }
 330
 331         $git->command('config', '--remove-section', "remote.$name");
 332
 333         eval {
 334             my @trackers = $git->command('config', '--get-regexp',
 335                         'branch.*.remote', $name);
 336                 for (@trackers) {
 337                         /^branch\.(.*)?\.remote/;
 338                         $git->config('--unset', "branch.$1.remote");
 339                         $git->config('--unset', "branch.$1.merge");
 340                 }
 341         };
 342
 343         my @refs = $git->command('for-each-ref',
 344                 '--format=%(refname) %(objectname)', "refs/remotes/$name");
 345         for (@refs) {
 346                 my ($ref, $object) = split;
 347                 $git->command(qw(update-ref -d), $ref, $object);
 348         }
 349         return 0;
 350 }
 351
 352 sub add_usage {
 353         print STDERR "Usage: git remote add [-f] [-t track]* [-m master] <name> <url>\n";
 354         exit(1);
 355 }
 356
 357 my $VERBOSE = 0;
 358 @ARGV = grep {
 359         if ($_ eq '-v' or $_ eq '--verbose') {
 360                 $VERBOSE=1;
 361                 0
 362         } else {
 363                 1
 364         }
 365 } @ARGV;
 366
 367 if (!@ARGV) {
 368         for (sort keys %$remote) {
 369                 print "$_";
 370                 print "\t$remote->{$_}->{URL}" if $VERBOSE;
 371                 print "\n";
 372         }
 373 }
 374 elsif ($ARGV[0] eq 'show') {
 375         my $ls_remote = 1;
 376         my $i;
 377         for ($i = 1; $i < @ARGV; $i++) {
 378                 if ($ARGV[$i] eq '-n') {
 379                         $ls_remote = 0;
 380                 }
 381                 else {
 382                         last;
 383                 }
 384         }
 385         if ($i >= @ARGV) {
 386                 print STDERR "Usage: git remote show <remote>\n";
 387                 exit(1);
 388         }
 389         my $status = 0;
 390         for (; $i < @ARGV; $i++) {
 391                 $status |= show_remote($ARGV[$i], $ls_remote);
 392         }
 393         exit($status);
 394 }
 395 elsif ($ARGV[0] eq 'update') {
 396         if (@ARGV <= 1) {
 397                 update_remote("default");
 398                 exit(1);
 399         }
 400         for (my $i = 1; $i < @ARGV; $i++) {
 401                 update_remote($ARGV[$i]);
 402         }
 403 }
 404 elsif ($ARGV[0] eq 'prune') {
 405         my $ls_remote = 1;
 406         my $i;
 407         for ($i = 1; $i < @ARGV; $i++) {
 408                 if ($ARGV[$i] eq '-n') {
 409                         $ls_remote = 0;
 410                 }
 411                 else {
 412                         last;
 413                 }
 414         }
 415         if ($i >= @ARGV) {
 416                 print STDERR "Usage: git remote prune <remote>\n";
 417                 exit(1);
 418         }
 419         my $status = 0;
 420         for (; $i < @ARGV; $i++) {
 421                 $status |= prune_remote($ARGV[$i], $ls_remote);
 422         }
 423         exit($status);
 424 }
 425 elsif ($ARGV[0] eq 'add') {
 426         my %opts = ();
 427         while (1 < @ARGV && $ARGV[1] =~ /^-/) {
 428                 my $opt = $ARGV[1];
 429                 shift @ARGV;
 430                 if ($opt eq '-f' || $opt eq '--fetch') {
 431                         $opts{'fetch'} = 1;
 432                         next;
 433                 }
 434                 if ($opt eq '-t' || $opt eq '--track') {
 435                         if (@ARGV < 1) {
 436                                 add_usage();
 437                         }
 438                         $opts{'track'} ||= [];
 439                         push @{$opts{'track'}}, $ARGV[1];
 440                         shift @ARGV;
 441                         next;
 442                 }
 443                 if ($opt eq '-m' || $opt eq '--master') {
 444                         if ((@ARGV < 1) || exists $opts{'master'}) {
 445                                 add_usage();
 446                         }
 447                         $opts{'master'} = $ARGV[1];
 448                         shift @ARGV;
 449                         next;
 450                 }
 451                 if ($opt eq '--mirror') {
 452                         $opts{'mirror'} = 1;
 453                         next;
 454                 }
 455                 add_usage();
 456         }
 457         if (@ARGV != 3) {
 458                 add_usage();
 459         }
 460         add_remote($ARGV[1], $ARGV[2], \%opts);
 461 }
 462 elsif ($ARGV[0] eq 'rm') {
 463         if (@ARGV <= 1) {
 464                 print STDERR "Usage: git remote rm <remote>\n";
 465                 exit(1);
 466         }
 467         exit(rm_remote($ARGV[1]));
 468 }
 469 else {
 470         print STDERR "Usage: git remote\n";
 471         print STDERR "       git remote add <name> <url>\n";
 472         print STDERR "       git remote rm <name>\n";
 473         print STDERR "       git remote show <name>\n";
 474         print STDERR "       git remote prune <name>\n";
 475         print STDERR "       git remote update [group]\n";
 476         exit(1);
 477 }