contrib/examples/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 { s|refs/heads/||; $_; } keys %{$git->remote_refs($info->{'URL'}, [ 'heads' ])};
 133         $info->{'LS_REMOTE'} = \@ref;
 134 }
 135
 136 sub list_wildcard_mapping {
 137         my ($forced, $ours, $ls) = @_;
 138         my %refs;
 139         for (@$ls) {
 140                 $refs{$_} = 01; # bit #0 to say "they have"
 141         }
 142         for ($git->command('for-each-ref', "refs/remotes/$ours")) {
 143                 chomp;
 144                 next unless (s|^[0-9a-f]{40}\s[a-z]+\srefs/remotes/$ours/||);
 145                 next if ($_ eq 'HEAD');
 146                 $refs{$_} ||= 0;
 147                 $refs{$_} |= 02; # bit #1 to say "we have"
 148         }
 149         my (@new, @stale, @tracked);
 150         for (sort keys %refs) {
 151                 my $have = $refs{$_};
 152                 if ($have == 1) {
 153                         push @new, $_;
 154                 }
 155                 elsif ($have == 2) {
 156                         push @stale, $_;
 157                 }
 158                 elsif ($have == 3) {
 159                         push @tracked, $_;
 160                 }
 161         }
 162         return \@new, \@stale, \@tracked;
 163 }
 164
 165 sub list_mapping {
 166         my ($name, $info) = @_;
 167         my $fetch = $info->{'FETCH'};
 168         my $ls = $info->{'LS_REMOTE'};
 169         my (@new, @stale, @tracked);
 170
 171         for (@$fetch) {
 172                 next unless (/(\+)?([^:]+):(.*)/);
 173                 my ($forced, $theirs, $ours) = ($1, $2, $3);
 174                 if ($theirs eq 'refs/heads/*' &&
 175                     $ours =~ /^refs\/remotes\/(.*)\/\*$/) {
 176                         # wildcard mapping
 177                         my ($w_new, $w_stale, $w_tracked)
 178                                 = list_wildcard_mapping($forced, $1, $ls);
 179                         push @new, @$w_new;
 180                         push @stale, @$w_stale;
 181                         push @tracked, @$w_tracked;
 182                 }
 183                 elsif ($theirs =~ /\*/ || $ours =~ /\*/) {
 184                         print STDERR "Warning: unrecognized mapping in remotes.$name.fetch: $_\n";
 185                 }
 186                 elsif ($theirs =~ s|^refs/heads/||) {
 187                         if (!grep { $_ eq $theirs } @$ls) {
 188                                 push @stale, $theirs;
 189                         }
 190                         elsif ($ours ne '') {
 191                                 push @tracked, $theirs;
 192                         }
 193                 }
 194         }
 195         return \@new, \@stale, \@tracked;
 196 }
 197
 198 sub show_mapping {
 199         my ($name, $info) = @_;
 200         my ($new, $stale, $tracked) = list_mapping($name, $info);
 201         if (@$new) {
 202                 print "  New remote branches (next fetch will store in remotes/$name)\n";
 203                 print "    @$new\n";
 204         }
 205         if (@$stale) {
 206                 print "  Stale tracking branches in remotes/$name (use 'git remote prune')\n";
 207                 print "    @$stale\n";
 208         }
 209         if (@$tracked) {
 210                 print "  Tracked remote branches\n";
 211                 print "    @$tracked\n";
 212         }
 213 }
 214
 215 sub prune_remote {
 216         my ($name, $ls_remote) = @_;
 217         if (!exists $remote->{$name}) {
 218                 print STDERR "No such remote $name\n";
 219                 return 1;
 220         }
 221         my $info = $remote->{$name};
 222         update_ls_remote($ls_remote, $info);
 223
 224         my ($new, $stale, $tracked) = list_mapping($name, $info);
 225         my $prefix = "refs/remotes/$name";
 226         foreach my $to_prune (@$stale) {
 227                 my @v = $git->command(qw(rev-parse --verify), "$prefix/$to_prune");
 228                 $git->command(qw(update-ref -d), "$prefix/$to_prune", $v[0]);
 229         }
 230         return 0;
 231 }
 232
 233 sub show_remote {
 234         my ($name, $ls_remote) = @_;
 235         if (!exists $remote->{$name}) {
 236                 print STDERR "No such remote $name\n";
 237                 return 1;
 238         }
 239         my $info = $remote->{$name};
 240         update_ls_remote($ls_remote, $info);
 241
 242         print "* remote $name\n";
 243         print "  URL: $info->{'URL'}\n";
 244         for my $branchname (sort keys %$branch) {
 245                 next unless (defined $branch->{$branchname}{'REMOTE'} &&
 246                              $branch->{$branchname}{'REMOTE'} eq $name);
 247                 my @merged = map {
 248                         s|^refs/heads/||;
 249                         $_;
 250                 } split(' ',"@{$branch->{$branchname}{'MERGE'}}");
 251                 next unless (@merged);
 252                 print "  Remote branch(es) merged with 'git pull' while on branch $branchname\n";
 253                 print "    @merged\n";
 254         }
 255         if ($info->{'LS_REMOTE'}) {
 256                 show_mapping($name, $info);
 257         }
 258         if ($info->{'PUSH'}) {
 259                 my @pushed = map {
 260                         s|^refs/heads/||;
 261                         s|^\+refs/heads/|+|;
 262                         s|:refs/heads/|:|;
 263                         $_;
 264                 } @{$info->{'PUSH'}};
 265                 print "  Local branch(es) pushed with 'git push'\n";
 266                 print "    @pushed\n";
 267         }
 268         return 0;
 269 }
 270
 271 sub add_remote {
 272         my ($name, $url, $opts) = @_;
 273         if (exists $remote->{$name}) {
 274                 print STDERR "remote $name already exists.\n";
 275                 exit(1);
 276         }
 277         $git->command('config', "remote.$name.url", $url);
 278         my $track = $opts->{'track'} || ["*"];
 279
 280         for (@$track) {
 281                 $git->command('config', '--add', "remote.$name.fetch",
 282                                 $opts->{'mirror'} ?
 283                                 "+refs/$_:refs/$_" :
 284                                 "+refs/heads/$_:refs/remotes/$name/$_");
 285         }
 286         if ($opts->{'fetch'}) {
 287                 $git->command('fetch', $name);
 288         }
 289         if (exists $opts->{'master'}) {
 290                 $git->command('symbolic-ref', "refs/remotes/$name/HEAD",
 291                               "refs/remotes/$name/$opts->{'master'}");
 292         }
 293 }
 294
 295 sub update_remote {
 296         my ($name) = @_;
 297         my @remotes;
 298
 299         my $conf = $git->config("remotes." . $name);
 300         if (defined($conf)) {
 301                 @remotes = split(' ', $conf);
 302         } elsif ($name eq 'default') {
 303                 @remotes = ();
 304                 for (sort keys %$remote) {
 305                         my $do_fetch = $git->config_bool("remote." . $_ .
 306                                                     ".skipDefaultUpdate");
 307                         unless ($do_fetch) {
 308                                 push @remotes, $_;
 309                         }
 310                 }
 311         } else {
 312                 print STDERR "Remote group $name does not exist.\n";
 313                 exit(1);
 314         }
 315         for (@remotes) {
 316                 print "Updating $_\n";
 317                 $git->command('fetch', "$_");
 318         }
 319 }
 320
 321 sub rm_remote {
 322         my ($name) = @_;
 323         if (!exists $remote->{$name}) {
 324                 print STDERR "No such remote $name\n";
 325                 return 1;
 326         }
 327
 328         $git->command('config', '--remove-section', "remote.$name");
 329
 330         eval {
 331             my @trackers = $git->command('config', '--get-regexp',
 332                         'branch.*.remote', $name);
 333                 for (@trackers) {
 334                         /^branch\.(.*)?\.remote/;
 335                         $git->config('--unset', "branch.$1.remote");
 336                         $git->config('--unset', "branch.$1.merge");
 337                 }
 338         };
 339
 340         my @refs = $git->command('for-each-ref',
 341                 '--format=%(refname) %(objectname)', "refs/remotes/$name");
 342         for (@refs) {
 343                 my ($ref, $object) = split;
 344                 $git->command(qw(update-ref -d), $ref, $object);
 345         }
 346         return 0;
 347 }
 348
 349 sub add_usage {
 350         print STDERR "usage: git remote add [-f] [-t track]* [-m master] <name> <url>\n";
 351         exit(1);
 352 }
 353
 354 my $VERBOSE = 0;
 355 @ARGV = grep {
 356         if ($_ eq '-v' or $_ eq '--verbose') {
 357                 $VERBOSE=1;
 358                 0
 359         } else {
 360                 1
 361         }
 362 } @ARGV;
 363
 364 if (!@ARGV) {
 365         for (sort keys %$remote) {
 366                 print "$_";
 367                 print "\t$remote->{$_}->{URL}" if $VERBOSE;
 368                 print "\n";
 369         }
 370 }
 371 elsif ($ARGV[0] eq 'show') {
 372         my $ls_remote = 1;
 373         my $i;
 374         for ($i = 1; $i < @ARGV; $i++) {
 375                 if ($ARGV[$i] eq '-n') {
 376                         $ls_remote = 0;
 377                 }
 378                 else {
 379                         last;
 380                 }
 381         }
 382         if ($i >= @ARGV) {
 383                 print STDERR "usage: git remote show <remote>\n";
 384                 exit(1);
 385         }
 386         my $status = 0;
 387         for (; $i < @ARGV; $i++) {
 388                 $status |= show_remote($ARGV[$i], $ls_remote);
 389         }
 390         exit($status);
 391 }
 392 elsif ($ARGV[0] eq 'update') {
 393         if (@ARGV <= 1) {
 394                 update_remote("default");
 395                 exit(1);
 396         }
 397         for (my $i = 1; $i < @ARGV; $i++) {
 398                 update_remote($ARGV[$i]);
 399         }
 400 }
 401 elsif ($ARGV[0] eq 'prune') {
 402         my $ls_remote = 1;
 403         my $i;
 404         for ($i = 1; $i < @ARGV; $i++) {
 405                 if ($ARGV[$i] eq '-n') {
 406                         $ls_remote = 0;
 407                 }
 408                 else {
 409                         last;
 410                 }
 411         }
 412         if ($i >= @ARGV) {
 413                 print STDERR "usage: git remote prune <remote>\n";
 414                 exit(1);
 415         }
 416         my $status = 0;
 417         for (; $i < @ARGV; $i++) {
 418                 $status |= prune_remote($ARGV[$i], $ls_remote);
 419         }
 420         exit($status);
 421 }
 422 elsif ($ARGV[0] eq 'add') {
 423         my %opts = ();
 424         while (1 < @ARGV && $ARGV[1] =~ /^-/) {
 425                 my $opt = $ARGV[1];
 426                 shift @ARGV;
 427                 if ($opt eq '-f' || $opt eq '--fetch') {
 428                         $opts{'fetch'} = 1;
 429                         next;
 430                 }
 431                 if ($opt eq '-t' || $opt eq '--track') {
 432                         if (@ARGV < 1) {
 433                                 add_usage();
 434                         }
 435                         $opts{'track'} ||= [];
 436                         push @{$opts{'track'}}, $ARGV[1];
 437                         shift @ARGV;
 438                         next;
 439                 }
 440                 if ($opt eq '-m' || $opt eq '--master') {
 441                         if ((@ARGV < 1) || exists $opts{'master'}) {
 442                                 add_usage();
 443                         }
 444                         $opts{'master'} = $ARGV[1];
 445                         shift @ARGV;
 446                         next;
 447                 }
 448                 if ($opt eq '--mirror') {
 449                         $opts{'mirror'} = 1;
 450                         next;
 451                 }
 452                 add_usage();
 453         }
 454         if (@ARGV != 3) {
 455                 add_usage();
 456         }
 457         add_remote($ARGV[1], $ARGV[2], \%opts);
 458 }
 459 elsif ($ARGV[0] eq 'rm') {
 460         if (@ARGV <= 1) {
 461                 print STDERR "usage: git remote rm <remote>\n";
 462                 exit(1);
 463         }
 464         exit(rm_remote($ARGV[1]));
 465 }
 466 else {
 467         print STDERR "usage: git remote\n";
 468         print STDERR "       git remote add <name> <url>\n";
 469         print STDERR "       git remote rm <name>\n";
 470         print STDERR "       git remote show <name>\n";
 471         print STDERR "       git remote prune <name>\n";
 472         print STDERR "       git remote update [group]\n";
 473         exit(1);
 474 }