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