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: /usr/share/doc/git/contrib/examples/ [ drwxr-xr-x ]
name : git-remote.perl
 #!/usr/bin/perl -w

use strict;
use Git;
my $git = Git->repository();

sub add_remote_config {
	my ($hash, $name, $what, $value) = @_;
	if ($what eq 'url') {
		# Having more than one is Ok -- it is used for push.
		if (! exists $hash->{'URL'}) {
			$hash->{$name}{'URL'} = $value;
		}
	}
	elsif ($what eq 'fetch') {
		$hash->{$name}{'FETCH'} ||= [];
		push @{$hash->{$name}{'FETCH'}}, $value;
	}
	elsif ($what eq 'push') {
		$hash->{$name}{'PUSH'} ||= [];
		push @{$hash->{$name}{'PUSH'}}, $value;
	}
	if (!exists $hash->{$name}{'SOURCE'}) {
		$hash->{$name}{'SOURCE'} = 'config';
	}
}

sub add_remote_remotes {
	my ($hash, $file, $name) = @_;

	if (exists $hash->{$name}) {
		$hash->{$name}{'WARNING'} = 'ignored due to config';
		return;
	}

	my $fh;
	if (!open($fh, '<', $file)) {
		print STDERR "Warning: cannot open $file\n";
		return;
	}
	my $it = { 'SOURCE' => 'remotes' };
	$hash->{$name} = $it;
	while (<$fh>) {
		chomp;
		if (/^URL:\s*(.*)$/) {
			# Having more than one is Ok -- it is used for push.
			if (! exists $it->{'URL'}) {
				$it->{'URL'} = $1;
			}
		}
		elsif (/^Push:\s*(.*)$/) {
			$it->{'PUSH'} ||= [];
			push @{$it->{'PUSH'}}, $1;
		}
		elsif (/^Pull:\s*(.*)$/) {
			$it->{'FETCH'} ||= [];
			push @{$it->{'FETCH'}}, $1;
		}
		elsif (/^\#/) {
			; # ignore
		}
		else {
			print STDERR "Warning: funny line in $file: $_\n";
		}
	}
	close($fh);
}

sub list_remote {
	my ($git) = @_;
	my %seen = ();
	my @remotes = eval {
		$git->command(qw(config --get-regexp), '^remote\.');
	};
	for (@remotes) {
		if (/^remote\.(\S+?)\.([^.\s]+)\s+(.*)$/) {
			add_remote_config(\%seen, $1, $2, $3);
		}
	}

	my $dir = $git->repo_path() . "/remotes";
	if (opendir(my $dh, $dir)) {
		local $_;
		while ($_ = readdir($dh)) {
			chomp;
			next if (! -f "$dir/$_" || ! -r _);
			add_remote_remotes(\%seen, "$dir/$_", $_);
		}
	}

	return \%seen;
}

sub add_branch_config {
	my ($hash, $name, $what, $value) = @_;
	if ($what eq 'remote') {
		if (exists $hash->{$name}{'REMOTE'}) {
			print STDERR "Warning: more than one branch.$name.remote\n";
		}
		$hash->{$name}{'REMOTE'} = $value;
	}
	elsif ($what eq 'merge') {
		$hash->{$name}{'MERGE'} ||= [];
		push @{$hash->{$name}{'MERGE'}}, $value;
	}
}

sub list_branch {
	my ($git) = @_;
	my %seen = ();
	my @branches = eval {
		$git->command(qw(config --get-regexp), '^branch\.');
	};
	for (@branches) {
		if (/^branch\.([^.]*)\.(\S*)\s+(.*)$/) {
			add_branch_config(\%seen, $1, $2, $3);
		}
	}

	return \%seen;
}

my $remote = list_remote($git);
my $branch = list_branch($git);

sub update_ls_remote {
	my ($harder, $info) = @_;

	return if (($harder == 0) ||
		   (($harder == 1) && exists $info->{'LS_REMOTE'}));

	my @ref = map { s|refs/heads/||; $_; } keys %{$git->remote_refs($info->{'URL'}, [ 'heads' ])};
	$info->{'LS_REMOTE'} = \@ref;
}

sub list_wildcard_mapping {
	my ($forced, $ours, $ls) = @_;
	my %refs;
	for (@$ls) {
		$refs{$_} = 01; # bit #0 to say "they have"
	}
	for ($git->command('for-each-ref', "refs/remotes/$ours")) {
		chomp;
		next unless (s|^[0-9a-f]{40}\s[a-z]+\srefs/remotes/$ours/||);
		next if ($_ eq 'HEAD');
		$refs{$_} ||= 0;
		$refs{$_} |= 02; # bit #1 to say "we have"
	}
	my (@new, @stale, @tracked);
	for (sort keys %refs) {
		my $have = $refs{$_};
		if ($have == 1) {
			push @new, $_;
		}
		elsif ($have == 2) {
			push @stale, $_;
		}
		elsif ($have == 3) {
			push @tracked, $_;
		}
	}
	return \@new, \@stale, \@tracked;
}

sub list_mapping {
	my ($name, $info) = @_;
	my $fetch = $info->{'FETCH'};
	my $ls = $info->{'LS_REMOTE'};
	my (@new, @stale, @tracked);

	for (@$fetch) {
		next unless (/(\+)?([^:]+):(.*)/);
		my ($forced, $theirs, $ours) = ($1, $2, $3);
		if ($theirs eq 'refs/heads/*' &&
		    $ours =~ /^refs\/remotes\/(.*)\/\*$/) {
			# wildcard mapping
			my ($w_new, $w_stale, $w_tracked)
				= list_wildcard_mapping($forced, $1, $ls);
			push @new, @$w_new;
			push @stale, @$w_stale;
			push @tracked, @$w_tracked;
		}
		elsif ($theirs =~ /\*/ || $ours =~ /\*/) {
			print STDERR "Warning: unrecognized mapping in remotes.$name.fetch: $_\n";
		}
		elsif ($theirs =~ s|^refs/heads/||) {
			if (!grep { $_ eq $theirs } @$ls) {
				push @stale, $theirs;
			}
			elsif ($ours ne '') {
				push @tracked, $theirs;
			}
		}
	}
	return \@new, \@stale, \@tracked;
}

sub show_mapping {
	my ($name, $info) = @_;
	my ($new, $stale, $tracked) = list_mapping($name, $info);
	if (@$new) {
		print "  New remote branches (next fetch will store in remotes/$name)\n";
		print "    @$new\n";
	}
	if (@$stale) {
		print "  Stale tracking branches in remotes/$name (use 'git remote prune')\n";
		print "    @$stale\n";
	}
	if (@$tracked) {
		print "  Tracked remote branches\n";
		print "    @$tracked\n";
	}
}

sub prune_remote {
	my ($name, $ls_remote) = @_;
	if (!exists $remote->{$name}) {
		print STDERR "No such remote $name\n";
		return 1;
	}
	my $info = $remote->{$name};
	update_ls_remote($ls_remote, $info);

	my ($new, $stale, $tracked) = list_mapping($name, $info);
	my $prefix = "refs/remotes/$name";
	foreach my $to_prune (@$stale) {
		my @v = $git->command(qw(rev-parse --verify), "$prefix/$to_prune");
		$git->command(qw(update-ref -d), "$prefix/$to_prune", $v[0]);
	}
	return 0;
}

sub show_remote {
	my ($name, $ls_remote) = @_;
	if (!exists $remote->{$name}) {
		print STDERR "No such remote $name\n";
		return 1;
	}
	my $info = $remote->{$name};
	update_ls_remote($ls_remote, $info);

	print "* remote $name\n";
	print "  URL: $info->{'URL'}\n";
	for my $branchname (sort keys %$branch) {
		next unless (defined $branch->{$branchname}{'REMOTE'} &&
			     $branch->{$branchname}{'REMOTE'} eq $name);
		my @merged = map {
			s|^refs/heads/||;
			$_;
		} split(' ',"@{$branch->{$branchname}{'MERGE'}}");
		next unless (@merged);
		print "  Remote branch(es) merged with 'git pull' while on branch $branchname\n";
		print "    @merged\n";
	}
	if ($info->{'LS_REMOTE'}) {
		show_mapping($name, $info);
	}
	if ($info->{'PUSH'}) {
		my @pushed = map {
			s|^refs/heads/||;
			s|^\+refs/heads/|+|;
			s|:refs/heads/|:|;
			$_;
		} @{$info->{'PUSH'}};
		print "  Local branch(es) pushed with 'git push'\n";
		print "    @pushed\n";
	}
	return 0;
}

sub add_remote {
	my ($name, $url, $opts) = @_;
	if (exists $remote->{$name}) {
		print STDERR "remote $name already exists.\n";
		exit(1);
	}
	$git->command('config', "remote.$name.url", $url);
	my $track = $opts->{'track'} || ["*"];

	for (@$track) {
		$git->command('config', '--add', "remote.$name.fetch",
				$opts->{'mirror'} ?
				"+refs/$_:refs/$_" :
				"+refs/heads/$_:refs/remotes/$name/$_");
	}
	if ($opts->{'fetch'}) {
		$git->command('fetch', $name);
	}
	if (exists $opts->{'master'}) {
		$git->command('symbolic-ref', "refs/remotes/$name/HEAD",
			      "refs/remotes/$name/$opts->{'master'}");
	}
}

sub update_remote {
	my ($name) = @_;
	my @remotes;

        my $conf = $git->config("remotes." . $name);
	if (defined($conf)) {
		@remotes = split(' ', $conf);
	} elsif ($name eq 'default') {
		@remotes = ();
		for (sort keys %$remote) {
			my $do_fetch = $git->config_bool("remote." . $_ .
						    ".skipDefaultUpdate");
			unless ($do_fetch) {
				push @remotes, $_;
			}
		}
	} else {
		print STDERR "Remote group $name does not exist.\n";
		exit(1);
	}
	for (@remotes) {
		print "Updating $_\n";
		$git->command('fetch', "$_");
	}
}

sub rm_remote {
	my ($name) = @_;
	if (!exists $remote->{$name}) {
		print STDERR "No such remote $name\n";
		return 1;
	}

	$git->command('config', '--remove-section', "remote.$name");

	eval {
	    my @trackers = $git->command('config', '--get-regexp',
			'branch.*.remote', $name);
		for (@trackers) {
			/^branch\.(.*)?\.remote/;
			$git->config('--unset', "branch.$1.remote");
			$git->config('--unset', "branch.$1.merge");
		}
	};

	my @refs = $git->command('for-each-ref',
		'--format=%(refname) %(objectname)', "refs/remotes/$name");
	for (@refs) {
		my ($ref, $object) = split;
		$git->command(qw(update-ref -d), $ref, $object);
	}
	return 0;
}

sub add_usage {
	print STDERR "usage: git remote add [-f] [-t track]* [-m master] <name> <url>\n";
	exit(1);
}

my $VERBOSE = 0;
@ARGV = grep {
	if ($_ eq '-v' or $_ eq '--verbose') {
		$VERBOSE=1;
		0
	} else {
		1
	}
} @ARGV;

if (!@ARGV) {
	for (sort keys %$remote) {
		print "$_";
		print "\t$remote->{$_}->{URL}" if $VERBOSE;
		print "\n";
	}
}
elsif ($ARGV[0] eq 'show') {
	my $ls_remote = 1;
	my $i;
	for ($i = 1; $i < @ARGV; $i++) {
		if ($ARGV[$i] eq '-n') {
			$ls_remote = 0;
		}
		else {
			last;
		}
	}
	if ($i >= @ARGV) {
		print STDERR "usage: git remote show <remote>\n";
		exit(1);
	}
	my $status = 0;
	for (; $i < @ARGV; $i++) {
		$status |= show_remote($ARGV[$i], $ls_remote);
	}
	exit($status);
}
elsif ($ARGV[0] eq 'update') {
	if (@ARGV <= 1) {
		update_remote("default");
		exit(1);
	}
	for (my $i = 1; $i < @ARGV; $i++) {
		update_remote($ARGV[$i]);
	}
}
elsif ($ARGV[0] eq 'prune') {
	my $ls_remote = 1;
	my $i;
	for ($i = 1; $i < @ARGV; $i++) {
		if ($ARGV[$i] eq '-n') {
			$ls_remote = 0;
		}
		else {
			last;
		}
	}
	if ($i >= @ARGV) {
		print STDERR "usage: git remote prune <remote>\n";
		exit(1);
	}
	my $status = 0;
	for (; $i < @ARGV; $i++) {
		$status |= prune_remote($ARGV[$i], $ls_remote);
	}
        exit($status);
}
elsif ($ARGV[0] eq 'add') {
	my %opts = ();
	while (1 < @ARGV && $ARGV[1] =~ /^-/) {
		my $opt = $ARGV[1];
		shift @ARGV;
		if ($opt eq '-f' || $opt eq '--fetch') {
			$opts{'fetch'} = 1;
			next;
		}
		if ($opt eq '-t' || $opt eq '--track') {
			if (@ARGV < 1) {
				add_usage();
			}
			$opts{'track'} ||= [];
			push @{$opts{'track'}}, $ARGV[1];
			shift @ARGV;
			next;
		}
		if ($opt eq '-m' || $opt eq '--master') {
			if ((@ARGV < 1) || exists $opts{'master'}) {
				add_usage();
			}
			$opts{'master'} = $ARGV[1];
			shift @ARGV;
			next;
		}
		if ($opt eq '--mirror') {
			$opts{'mirror'} = 1;
			next;
		}
		add_usage();
	}
	if (@ARGV != 3) {
		add_usage();
	}
	add_remote($ARGV[1], $ARGV[2], \%opts);
}
elsif ($ARGV[0] eq 'rm') {
	if (@ARGV <= 1) {
		print STDERR "usage: git remote rm <remote>\n";
		exit(1);
	}
	exit(rm_remote($ARGV[1]));
}
else {
	print STDERR "usage: git remote\n";
	print STDERR "       git remote add <name> <url>\n";
	print STDERR "       git remote rm <name>\n";
	print STDERR "       git remote show <name>\n";
	print STDERR "       git remote prune <name>\n";
	print STDERR "       git remote update [group]\n";
	exit(1);
}