git-remote
[git/git.git] / git-remote.perl
1 #!/usr/bin/perl -w
2
3 use Git;
4 my $git = Git->repository();
5
6 sub add_remote_config {
7 my ($hash, $name, $what, $value) = @_;
8 if ($what eq 'url') {
9 if (exists $hash->{$name}{'URL'}) {
10 print STDERR "Warning: more than one remote.$name.url\n";
11 }
12 $hash->{$name}{'URL'} = $value;
13 }
14 elsif ($what eq 'fetch') {
15 $hash->{$name}{'FETCH'} ||= [];
16 push @{$hash->{$name}{'FETCH'}}, $value;
17 }
18 if (!exists $hash->{$name}{'SOURCE'}) {
19 $hash->{$name}{'SOURCE'} = 'config';
20 }
21 }
22
23 sub add_remote_remotes {
24 my ($hash, $file, $name) = @_;
25
26 if (exists $hash->{$name}) {
27 $hash->{$name}{'WARNING'} = 'ignored due to config';
28 return;
29 }
30
31 my $fh;
32 if (!open($fh, '<', $file)) {
33 print STDERR "Warning: cannot open $file\n";
34 return;
35 }
36 my $it = { 'SOURCE' => 'remotes' };
37 $hash->{$name} = $it;
38 while (<$fh>) {
39 chomp;
40 if (/^URL:\s*(.*)$/) {
41 # Having more than one is Ok -- it is used for push.
42 if (! exists $it->{'URL'}) {
43 $it->{'URL'} = $1;
44 }
45 }
46 elsif (/^Push:\s*(.*)$/) {
47 ; # later
48 }
49 elsif (/^Pull:\s*(.*)$/) {
50 $it->{'FETCH'} ||= [];
51 push @{$it->{'FETCH'}}, $1;
52 }
53 elsif (/^\#/) {
54 ; # ignore
55 }
56 else {
57 print STDERR "Warning: funny line in $file: $_\n";
58 }
59 }
60 close($fh);
61 }
62
63 sub list_remote {
64 my ($git) = @_;
65 my %seen = ();
66 my @remotes = eval {
67 $git->command(qw(repo-config --get-regexp), '^remote\.');
68 };
69 for (@remotes) {
70 if (/^remote\.([^.]*)\.(\S*)\s+(.*)$/) {
71 add_remote_config(\%seen, $1, $2, $3);
72 }
73 }
74
75 my $dir = $git->repo_path() . "/remotes";
76 if (opendir(my $dh, $dir)) {
77 local $_;
78 while ($_ = readdir($dh)) {
79 chomp;
80 next if (! -f "$dir/$_" || ! -r _);
81 add_remote_remotes(\%seen, "$dir/$_", $_);
82 }
83 }
84
85 return \%seen;
86 }
87
88 sub add_branch_config {
89 my ($hash, $name, $what, $value) = @_;
90 if ($what eq 'remote') {
91 if (exists $hash->{$name}{'REMOTE'}) {
92 print STDERR "Warning: more than one branch.$name.remote\n";
93 }
94 $hash->{$name}{'REMOTE'} = $value;
95 }
96 elsif ($what eq 'merge') {
97 $hash->{$name}{'MERGE'} ||= [];
98 push @{$hash->{$name}{'MERGE'}}, $value;
99 }
100 }
101
102 sub list_branch {
103 my ($git) = @_;
104 my %seen = ();
105 my @branches = eval {
106 $git->command(qw(repo-config --get-regexp), '^branch\.');
107 };
108 for (@branches) {
109 if (/^branch\.([^.]*)\.(\S*)\s+(.*)$/) {
110 add_branch_config(\%seen, $1, $2, $3);
111 }
112 }
113
114 return \%seen;
115 }
116
117 my $remote = list_remote($git);
118 my $branch = list_branch($git);
119
120 sub update_ls_remote {
121 my ($harder, $info) = @_;
122
123 return if (($harder == 0) ||
124 (($harder == 1) && exists $info->{'LS_REMOTE'}));
125
126 my @ref = map {
127 s|^[0-9a-f]{40}\s+refs/heads/||;
128 $_;
129 } $git->command(qw(ls-remote --heads), $info->{'URL'});
130 $info->{'LS_REMOTE'} = \@ref;
131 }
132
133 sub show_wildcard_mapping {
134 my ($forced, $ours, $ls) = @_;
135 my %refs;
136 for (@$ls) {
137 $refs{$_} = 01; # bit #0 to say "they have"
138 }
139 for ($git->command('for-each-ref', "refs/remotes/$ours")) {
140 chomp;
141 next unless (s|^[0-9a-f]{40}\s[a-z]+\srefs/remotes/$ours/||);
142 next if ($_ eq 'HEAD');
143 $refs{$_} ||= 0;
144 $refs{$_} |= 02; # bit #1 to say "we have"
145 }
146 my (@new, @stale, @tracked);
147 for (sort keys %refs) {
148 my $have = $refs{$_};
149 if ($have == 1) {
150 push @new, $_;
151 }
152 elsif ($have == 2) {
153 push @stale, $_;
154 }
155 elsif ($have == 3) {
156 push @tracked, $_;
157 }
158 }
159 if (@new) {
160 print " New remote branches (next fetch will store in remotes/$ours)\n";
161 print " @new\n";
162 }
163 if (@stale) {
164 print " Stale tracking branches in remotes/$ours (you'd better remove them)\n";
165 print " @stale\n";
166 }
167 if (@tracked) {
168 print " Tracked remote branches\n";
169 print " @tracked\n";
170 }
171 }
172
173 sub show_mapping {
174 my ($name, $info) = @_;
175 my $fetch = $info->{'FETCH'};
176 my $ls = $info->{'LS_REMOTE'};
177 my (@stale, @tracked);
178
179 for (@$fetch) {
180 next unless (/(\+)?([^:]+):(.*)/);
181 my ($forced, $theirs, $ours) = ($1, $2, $3);
182 if ($theirs eq 'refs/heads/*' &&
183 $ours =~ /^refs\/remotes\/(.*)\/\*$/) {
184 # wildcard mapping
185 show_wildcard_mapping($forced, $1, $ls);
186 }
187 elsif ($theirs =~ /\*/ || $ours =~ /\*/) {
188 print STDERR "Warning: unrecognized mapping in remotes.$name.fetch: $_\n";
189 }
190 elsif ($theirs =~ s|^refs/heads/||) {
191 if (!grep { $_ eq $theirs } @$ls) {
192 push @stale, $theirs;
193 }
194 elsif ($ours ne '') {
195 push @tracked, $theirs;
196 }
197 }
198 }
199 if (@stale) {
200 print " Stale tracking branches in remotes/$name (you'd better remove them)\n";
201 print " @stale\n";
202 }
203 if (@tracked) {
204 print " Tracked remote branches\n";
205 print " @tracked\n";
206 }
207 }
208
209 sub show_remote {
210 my ($name, $ls_remote) = @_;
211 if (!exists $remote->{$name}) {
212 print STDERR "No such remote $name\n";
213 return;
214 }
215 my $info = $remote->{$name};
216 update_ls_remote($ls_remote, $info);
217
218 print "* remote $name\n";
219 print " URL: $info->{'URL'}\n";
220 for my $branchname (sort keys %$branch) {
221 next if ($branch->{$branchname}{'REMOTE'} ne $name);
222 my @merged = map {
223 s|^refs/heads/||;
224 $_;
225 } split(' ',"@{$branch->{$branchname}{'MERGE'}}");
226 next unless (@merged);
227 print " Remote branch(es) merged with 'git pull' while on branch $branchname\n";
228 print " @merged\n";
229 }
230 if ($info->{'LS_REMOTE'}) {
231 show_mapping($name, $info);
232 }
233 }
234
235 sub add_remote {
236 my ($name, $url) = @_;
237 if (exists $remote->{$name}) {
238 print STDERR "remote $name already exists.\n";
239 exit(1);
240 }
241 $git->command('repo-config', "remote.$name.url", $url);
242 $git->command('repo-config', "remote.$name.fetch",
243 "+refs/heads/*:refs/remotes/$name/*");
244 }
245
246 if (!@ARGV) {
247 for (sort keys %$remote) {
248 print "$_\n";
249 }
250 }
251 elsif ($ARGV[0] eq 'show') {
252 my $ls_remote = 1;
253 my $i;
254 for ($i = 1; $i < @ARGV; $i++) {
255 if ($ARGV[$i] eq '-n') {
256 $ls_remote = 0;
257 }
258 else {
259 last;
260 }
261 }
262 if ($i >= @ARGV) {
263 print STDERR "Usage: git remote show <remote>\n";
264 exit(1);
265 }
266 for (; $i < @ARGV; $i++) {
267 show_remote($ARGV[$i], $ls_remote);
268 }
269 }
270 elsif ($ARGV[0] eq 'add') {
271 if (@ARGV != 3) {
272 print STDERR "Usage: git remote add <name> <url>\n";
273 exit(1);
274 }
275 add_remote($ARGV[1], $ARGV[2]);
276 }
277