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