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(&line, stdin, '\n') != 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 }