builtin/fetch-pack.c

   1 #include "builtin.h"
   2 #include "gettext.h"
   3 #include "hex.h"
   4 #include "object-file.h"
   5 #include "pkt-line.h"
   6 #include "fetch-pack.h"
   7 #include "remote.h"
   8 #include "connect.h"
   9 #include "oid-array.h"
  10 #include "protocol.h"
  11
  12 static const char fetch_pack_usage[] =
  13 "git fetch-pack [--all] [--stdin] [--quiet | -q] [--keep | -k] [--thin] "
  14 "[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
  15 "[--no-progress] [--diag-url] [-v] [<host>:]<directory> [<refs>...]";
  16
  17 static void add_sought_entry(struct ref ***sought, int *nr, int *alloc,
  18                              const char *name)
  19 {
  20         struct ref *ref;
  21         struct object_id oid;
  22         const char *p;
  23
  24         if (!parse_oid_hex(name, &oid, &p)) {
  25                 if (*p == ' ') {
  26                         /* <oid> <ref>, find refname */
  27                         name = p + 1;
  28                 } else if (*p == '\0') {
  29                         ; /* <oid>, leave oid as name */
  30                 } else {
  31                         /* <ref>, clear cruft from oid */
  32                         oidclr(&oid, the_repository->hash_algo);
  33                 }
  34         } else {
  35                 /* <ref>, clear cruft from get_oid_hex */
  36                 oidclr(&oid, the_repository->hash_algo);
  37         }
  38
  39         ref = alloc_ref(name);
  40         oidcpy(&ref->old_oid, &oid);
  41         (*nr)++;
  42         ALLOC_GROW(*sought, *nr, *alloc);
  43         (*sought)[*nr - 1] = ref;
  44 }
  45
  46 int cmd_fetch_pack(int argc, const char **argv, const char *prefix UNUSED)
  47 {
  48         int i, ret;
  49         struct ref *fetched_refs = NULL, *remote_refs = NULL;
  50         const char *dest = NULL;
  51         struct ref **sought = NULL;
  52         int nr_sought = 0, alloc_sought = 0;
  53         int fd[2];
  54         struct string_list pack_lockfiles = STRING_LIST_INIT_DUP;
  55         struct string_list *pack_lockfiles_ptr = NULL;
  56         struct child_process *conn;
  57         struct fetch_pack_args args;
  58         struct oid_array shallow = OID_ARRAY_INIT;
  59         struct string_list deepen_not = STRING_LIST_INIT_DUP;
  60         struct packet_reader reader;
  61         enum protocol_version version;
  62
  63         fetch_if_missing = 0;
  64
  65         packet_trace_identity("fetch-pack");
  66
  67         memset(&args, 0, sizeof(args));
  68         list_objects_filter_init(&args.filter_options);
  69         args.uploadpack = "git-upload-pack";
  70
  71         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  72                 const char *arg = argv[i];
  73
  74                 if (skip_prefix(arg, "--upload-pack=", &arg)) {
  75                         args.uploadpack = arg;
  76                         continue;
  77                 }
  78                 if (skip_prefix(arg, "--exec=", &arg)) {
  79                         args.uploadpack = arg;
  80                         continue;
  81                 }
  82                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  83                         args.quiet = 1;
  84                         continue;
  85                 }
  86                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  87                         args.lock_pack = args.keep_pack;
  88                         args.keep_pack = 1;
  89                         continue;
  90                 }
  91                 if (!strcmp("--thin", arg)) {
  92                         args.use_thin_pack = 1;
  93                         continue;
  94                 }
  95                 if (!strcmp("--include-tag", arg)) {
  96                         args.include_tag = 1;
  97                         continue;
  98                 }
  99                 if (!strcmp("--all", arg)) {
 100                         args.fetch_all = 1;
 101                         continue;
 102                 }
 103                 if (!strcmp("--stdin", arg)) {
 104                         args.stdin_refs = 1;
 105                         continue;
 106                 }
 107                 if (!strcmp("--diag-url", arg)) {
 108                         args.diag_url = 1;
 109                         continue;
 110                 }
 111                 if (!strcmp("-v", arg)) {
 112                         args.verbose = 1;
 113                         continue;
 114                 }
 115                 if (skip_prefix(arg, "--depth=", &arg)) {
 116                         args.depth = strtol(arg, NULL, 0);
 117                         continue;
 118                 }
 119                 if (skip_prefix(arg, "--shallow-since=", &arg)) {
 120                         args.deepen_since = xstrdup(arg);
 121                         continue;
 122                 }
 123                 if (skip_prefix(arg, "--shallow-exclude=", &arg)) {
 124                         string_list_append(&deepen_not, arg);
 125                         continue;
 126                 }
 127                 if (!strcmp(arg, "--deepen-relative")) {
 128                         args.deepen_relative = 1;
 129                         continue;
 130                 }
 131                 if (!strcmp("--no-progress", arg)) {
 132                         args.no_progress = 1;
 133                         continue;
 134                 }
 135                 if (!strcmp("--stateless-rpc", arg)) {
 136                         args.stateless_rpc = 1;
 137                         continue;
 138                 }
 139                 if (!strcmp("--lock-pack", arg)) {
 140                         args.lock_pack = 1;
 141                         pack_lockfiles_ptr = &pack_lockfiles;
 142                         continue;
 143                 }
 144                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 145                         args.check_self_contained_and_connected = 1;
 146                         continue;
 147                 }
 148                 if (!strcmp("--cloning", arg)) {
 149                         args.cloning = 1;
 150                         continue;
 151                 }
 152                 if (!strcmp("--update-shallow", arg)) {
 153                         args.update_shallow = 1;
 154                         continue;
 155                 }
 156                 if (!strcmp("--from-promisor", arg)) {
 157                         args.from_promisor = 1;
 158                         continue;
 159                 }
 160                 if (!strcmp("--refetch", arg)) {
 161                         args.refetch = 1;
 162                         continue;
 163                 }
 164                 if (skip_prefix(arg, ("--filter="), &arg)) {
 165                         parse_list_objects_filter(&args.filter_options, arg);
 166                         continue;
 167                 }
 168                 if (!strcmp(arg, ("--no-filter"))) {
 169                         list_objects_filter_set_no_filter(&args.filter_options);
 170                         continue;
 171                 }
 172                 usage(fetch_pack_usage);
 173         }
 174         if (deepen_not.nr)
 175                 args.deepen_not = &deepen_not;
 176
 177         if (i < argc)
 178                 dest = argv[i++];
 179         else
 180                 usage(fetch_pack_usage);
 181
 182         /*
 183          * Copy refs from cmdline to growable list, then append any
 184          * refs from the standard input:
 185          */
 186         for (; i < argc; i++)
 187                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 188         if (args.stdin_refs) {
 189                 if (args.stateless_rpc) {
 190                         /* in stateless RPC mode we use pkt-line to read
 191                          * from stdin, until we get a flush packet
 192                          */
 193                         for (;;) {
 194                                 char *line = packet_read_line(0, NULL);
 195                                 if (!line)
 196                                         break;
 197                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 198                         }
 199                 }
 200                 else {
 201                         /* read from stdin one ref per line, until EOF */
 202                         struct strbuf line = STRBUF_INIT;
 203                         while (strbuf_getline_lf(&line, stdin) != EOF)
 204                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 205                         strbuf_release(&line);
 206                 }
 207         }
 208
 209         if (args.stateless_rpc) {
 210                 conn = NULL;
 211                 fd[0] = 0;
 212                 fd[1] = 1;
 213         } else {
 214                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 215                 if (args.diag_url)
 216                         flags |= CONNECT_DIAG_URL;
 217                 conn = git_connect(fd, dest, "git-upload-pack",
 218                                    args.uploadpack, flags);
 219                 if (!conn)
 220                         return args.diag_url ? 0 : 1;
 221         }
 222
 223         packet_reader_init(&reader, fd[0], NULL, 0,
 224                            PACKET_READ_CHOMP_NEWLINE |
 225                            PACKET_READ_GENTLE_ON_EOF |
 226                            PACKET_READ_DIE_ON_ERR_PACKET);
 227
 228         version = discover_version(&reader);
 229         switch (version) {
 230         case protocol_v2:
 231                 get_remote_refs(fd[1], &reader, &remote_refs, 0, NULL, NULL,
 232                                 args.stateless_rpc);
 233                 break;
 234         case protocol_v1:
 235         case protocol_v0:
 236                 get_remote_heads(&reader, &remote_refs, 0, NULL, &shallow);
 237                 break;
 238         case protocol_unknown_version:
 239                 BUG("unknown protocol version");
 240         }
 241
 242         fetched_refs = fetch_pack(&args, fd, remote_refs, sought, nr_sought,
 243                          &shallow, pack_lockfiles_ptr, version);
 244
 245         if (pack_lockfiles.nr) {
 246                 int i;
 247
 248                 printf("lock %s\n", pack_lockfiles.items[0].string);
 249                 fflush(stdout);
 250                 for (i = 1; i < pack_lockfiles.nr; i++)
 251                         warning(_("Lockfile created but not reported: %s"),
 252                                 pack_lockfiles.items[i].string);
 253         }
 254         if (args.check_self_contained_and_connected &&
 255             args.self_contained_and_connected) {
 256                 printf("connectivity-ok\n");
 257                 fflush(stdout);
 258         }
 259         close(fd[0]);
 260         close(fd[1]);
 261         if (finish_connect(conn))
 262                 return 1;
 263
 264         ret = !fetched_refs;
 265
 266         /*
 267          * If the heads to pull were given, we should have consumed
 268          * all of them by matching the remote.  Otherwise, 'git fetch
 269          * remote no-such-ref' would silently succeed without issuing
 270          * an error.
 271          */
 272         ret |= report_unmatched_refs(sought, nr_sought);
 273
 274         for (struct ref *ref = fetched_refs; ref; ref = ref->next)
 275                 printf("%s %s\n",
 276                        oid_to_hex(&ref->old_oid), ref->name);
 277
 278         for (size_t i = 0; i < nr_sought; i++)
 279                 free_one_ref(sought[i]);
 280         free(sought);
 281         free_refs(fetched_refs);
 282         free_refs(remote_refs);
 283         return ret;
 284 }