Merge branch 'jc/merge-refuse-new-root'
[git] / builtin / fetch-pack.c
1 #include "builtin.h"
2 #include "pkt-line.h"
3 #include "fetch-pack.h"
4 #include "remote.h"
5 #include "connect.h"
6 #include "sha1-array.h"
7
8 static const char fetch_pack_usage[] =
9 "git fetch-pack [--all] [--stdin] [--quiet | -q] [--keep | -k] [--thin] "
10 "[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
11 "[--no-progress] [--diag-url] [-v] [<host>:]<directory> [<refs>...]";
12
13 static void add_sought_entry(struct ref ***sought, int *nr, int *alloc,
14                              const char *name)
15 {
16         struct ref *ref;
17         struct object_id oid;
18
19         if (!get_oid_hex(name, &oid)) {
20                 if (name[GIT_SHA1_HEXSZ] == ' ') {
21                         /* <sha1> <ref>, find refname */
22                         name += GIT_SHA1_HEXSZ + 1;
23                 } else if (name[GIT_SHA1_HEXSZ] == '\0') {
24                         ; /* <sha1>, leave sha1 as name */
25                 } else {
26                         /* <ref>, clear cruft from oid */
27                         oidclr(&oid);
28                 }
29         } else {
30                 /* <ref>, clear cruft from get_oid_hex */
31                 oidclr(&oid);
32         }
33
34         ref = alloc_ref(name);
35         oidcpy(&ref->old_oid, &oid);
36         (*nr)++;
37         ALLOC_GROW(*sought, *nr, *alloc);
38         (*sought)[*nr - 1] = ref;
39 }
40
41 int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
42 {
43         int i, ret;
44         struct ref *ref = NULL;
45         const char *dest = NULL;
46         struct ref **sought = NULL;
47         int nr_sought = 0, alloc_sought = 0;
48         int fd[2];
49         char *pack_lockfile = NULL;
50         char **pack_lockfile_ptr = NULL;
51         struct child_process *conn;
52         struct fetch_pack_args args;
53         struct sha1_array shallow = SHA1_ARRAY_INIT;
54
55         packet_trace_identity("fetch-pack");
56
57         memset(&args, 0, sizeof(args));
58         args.uploadpack = "git-upload-pack";
59
60         for (i = 1; i < argc && *argv[i] == '-'; i++) {
61                 const char *arg = argv[i];
62
63                 if (starts_with(arg, "--upload-pack=")) {
64                         args.uploadpack = arg + 14;
65                         continue;
66                 }
67                 if (starts_with(arg, "--exec=")) {
68                         args.uploadpack = arg + 7;
69                         continue;
70                 }
71                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
72                         args.quiet = 1;
73                         continue;
74                 }
75                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
76                         args.lock_pack = args.keep_pack;
77                         args.keep_pack = 1;
78                         continue;
79                 }
80                 if (!strcmp("--thin", arg)) {
81                         args.use_thin_pack = 1;
82                         continue;
83                 }
84                 if (!strcmp("--include-tag", arg)) {
85                         args.include_tag = 1;
86                         continue;
87                 }
88                 if (!strcmp("--all", arg)) {
89                         args.fetch_all = 1;
90                         continue;
91                 }
92                 if (!strcmp("--stdin", arg)) {
93                         args.stdin_refs = 1;
94                         continue;
95                 }
96                 if (!strcmp("--diag-url", arg)) {
97                         args.diag_url = 1;
98                         continue;
99                 }
100                 if (!strcmp("-v", arg)) {
101                         args.verbose = 1;
102                         continue;
103                 }
104                 if (starts_with(arg, "--depth=")) {
105                         args.depth = strtol(arg + 8, NULL, 0);
106                         continue;
107                 }
108                 if (!strcmp("--no-progress", arg)) {
109                         args.no_progress = 1;
110                         continue;
111                 }
112                 if (!strcmp("--stateless-rpc", arg)) {
113                         args.stateless_rpc = 1;
114                         continue;
115                 }
116                 if (!strcmp("--lock-pack", arg)) {
117                         args.lock_pack = 1;
118                         pack_lockfile_ptr = &pack_lockfile;
119                         continue;
120                 }
121                 if (!strcmp("--check-self-contained-and-connected", arg)) {
122                         args.check_self_contained_and_connected = 1;
123                         continue;
124                 }
125                 if (!strcmp("--cloning", arg)) {
126                         args.cloning = 1;
127                         continue;
128                 }
129                 if (!strcmp("--update-shallow", arg)) {
130                         args.update_shallow = 1;
131                         continue;
132                 }
133                 usage(fetch_pack_usage);
134         }
135
136         if (i < argc)
137                 dest = argv[i++];
138         else
139                 usage(fetch_pack_usage);
140
141         /*
142          * Copy refs from cmdline to growable list, then append any
143          * refs from the standard input:
144          */
145         for (; i < argc; i++)
146                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
147         if (args.stdin_refs) {
148                 if (args.stateless_rpc) {
149                         /* in stateless RPC mode we use pkt-line to read
150                          * from stdin, until we get a flush packet
151                          */
152                         for (;;) {
153                                 char *line = packet_read_line(0, NULL);
154                                 if (!line)
155                                         break;
156                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
157                         }
158                 }
159                 else {
160                         /* read from stdin one ref per line, until EOF */
161                         struct strbuf line = STRBUF_INIT;
162                         while (strbuf_getline_lf(&line, stdin) != EOF)
163                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
164                         strbuf_release(&line);
165                 }
166         }
167
168         if (args.stateless_rpc) {
169                 conn = NULL;
170                 fd[0] = 0;
171                 fd[1] = 1;
172         } else {
173                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
174                 if (args.diag_url)
175                         flags |= CONNECT_DIAG_URL;
176                 conn = git_connect(fd, dest, args.uploadpack,
177                                    flags);
178                 if (!conn)
179                         return args.diag_url ? 0 : 1;
180         }
181         get_remote_heads(fd[0], NULL, 0, &ref, 0, NULL, &shallow);
182
183         ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought,
184                          &shallow, pack_lockfile_ptr);
185         if (pack_lockfile) {
186                 printf("lock %s\n", pack_lockfile);
187                 fflush(stdout);
188         }
189         if (args.check_self_contained_and_connected &&
190             args.self_contained_and_connected) {
191                 printf("connectivity-ok\n");
192                 fflush(stdout);
193         }
194         close(fd[0]);
195         close(fd[1]);
196         if (finish_connect(conn))
197                 return 1;
198
199         ret = !ref;
200
201         /*
202          * If the heads to pull were given, we should have consumed
203          * all of them by matching the remote.  Otherwise, 'git fetch
204          * remote no-such-ref' would silently succeed without issuing
205          * an error.
206          */
207         for (i = 0; i < nr_sought; i++) {
208                 if (!sought[i] || sought[i]->matched)
209                         continue;
210                 error("no such remote ref %s", sought[i]->name);
211                 ret = 1;
212         }
213
214         while (ref) {
215                 printf("%s %s\n",
216                        oid_to_hex(&ref->old_oid), ref->name);
217                 ref = ref->next;
218         }
219
220         return ret;
221 }