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 #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         char *pack_lockfile = NULL;
  52         char **pack_lockfile_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         args.uploadpack = "git-upload-pack";
  66
  67         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  68                 const char *arg = argv[i];
  69
  70                 if (skip_prefix(arg, "--upload-pack=", &arg)) {
  71                         args.uploadpack = arg;
  72                         continue;
  73                 }
  74                 if (skip_prefix(arg, "--exec=", &arg)) {
  75                         args.uploadpack = arg;
  76                         continue;
  77                 }
  78                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  79                         args.quiet = 1;
  80                         continue;
  81                 }
  82                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  83                         args.lock_pack = args.keep_pack;
  84                         args.keep_pack = 1;
  85                         continue;
  86                 }
  87                 if (!strcmp("--thin", arg)) {
  88                         args.use_thin_pack = 1;
  89                         continue;
  90                 }
  91                 if (!strcmp("--include-tag", arg)) {
  92                         args.include_tag = 1;
  93                         continue;
  94                 }
  95                 if (!strcmp("--all", arg)) {
  96                         args.fetch_all = 1;
  97                         continue;
  98                 }
  99                 if (!strcmp("--stdin", arg)) {
 100                         args.stdin_refs = 1;
 101                         continue;
 102                 }
 103                 if (!strcmp("--diag-url", arg)) {
 104                         args.diag_url = 1;
 105                         continue;
 106                 }
 107                 if (!strcmp("-v", arg)) {
 108                         args.verbose = 1;
 109                         continue;
 110                 }
 111                 if (skip_prefix(arg, "--depth=", &arg)) {
 112                         args.depth = strtol(arg, NULL, 0);
 113                         continue;
 114                 }
 115                 if (skip_prefix(arg, "--shallow-since=", &arg)) {
 116                         args.deepen_since = xstrdup(arg);
 117                         continue;
 118                 }
 119                 if (skip_prefix(arg, "--shallow-exclude=", &arg)) {
 120                         string_list_append(&deepen_not, arg);
 121                         continue;
 122                 }
 123                 if (!strcmp(arg, "--deepen-relative")) {
 124                         args.deepen_relative = 1;
 125                         continue;
 126                 }
 127                 if (!strcmp("--no-progress", arg)) {
 128                         args.no_progress = 1;
 129                         continue;
 130                 }
 131                 if (!strcmp("--stateless-rpc", arg)) {
 132                         args.stateless_rpc = 1;
 133                         continue;
 134                 }
 135                 if (!strcmp("--lock-pack", arg)) {
 136                         args.lock_pack = 1;
 137                         pack_lockfile_ptr = &pack_lockfile;
 138                         continue;
 139                 }
 140                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 141                         args.check_self_contained_and_connected = 1;
 142                         continue;
 143                 }
 144                 if (!strcmp("--cloning", arg)) {
 145                         args.cloning = 1;
 146                         continue;
 147                 }
 148                 if (!strcmp("--update-shallow", arg)) {
 149                         args.update_shallow = 1;
 150                         continue;
 151                 }
 152                 if (!strcmp("--from-promisor", arg)) {
 153                         args.from_promisor = 1;
 154                         continue;
 155                 }
 156                 if (!strcmp("--no-dependents", arg)) {
 157                         args.no_dependents = 1;
 158                         continue;
 159                 }
 160                 if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 161                         parse_list_objects_filter(&args.filter_options, arg);
 162                         continue;
 163                 }
 164                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 165                         list_objects_filter_set_no_filter(&args.filter_options);
 166                         continue;
 167                 }
 168                 usage(fetch_pack_usage);
 169         }
 170         if (deepen_not.nr)
 171                 args.deepen_not = &deepen_not;
 172
 173         if (i < argc)
 174                 dest = argv[i++];
 175         else
 176                 usage(fetch_pack_usage);
 177
 178         /*
 179          * Copy refs from cmdline to growable list, then append any
 180          * refs from the standard input:
 181          */
 182         for (; i < argc; i++)
 183                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 184         if (args.stdin_refs) {
 185                 if (args.stateless_rpc) {
 186                         /* in stateless RPC mode we use pkt-line to read
 187                          * from stdin, until we get a flush packet
 188                          */
 189                         for (;;) {
 190                                 char *line = packet_read_line(0, NULL);
 191                                 if (!line)
 192                                         break;
 193                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 194                         }
 195                 }
 196                 else {
 197                         /* read from stdin one ref per line, until EOF */
 198                         struct strbuf line = STRBUF_INIT;
 199                         while (strbuf_getline_lf(&line, stdin) != EOF)
 200                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 201                         strbuf_release(&line);
 202                 }
 203         }
 204
 205         if (args.stateless_rpc) {
 206                 conn = NULL;
 207                 fd[0] = 0;
 208                 fd[1] = 1;
 209         } else {
 210                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 211                 if (args.diag_url)
 212                         flags |= CONNECT_DIAG_URL;
 213                 conn = git_connect(fd, dest, args.uploadpack,
 214                                    flags);
 215                 if (!conn)
 216                         return args.diag_url ? 0 : 1;
 217         }
 218
 219         packet_reader_init(&reader, fd[0], NULL, 0,
 220                            PACKET_READ_CHOMP_NEWLINE |
 221                            PACKET_READ_GENTLE_ON_EOF |
 222                            PACKET_READ_DIE_ON_ERR_PACKET);
 223
 224         version = discover_version(&reader);
 225         switch (version) {
 226         case protocol_v2:
 227                 get_remote_refs(fd[1], &reader, &ref, 0, NULL, NULL);
 228                 break;
 229         case protocol_v1:
 230         case protocol_v0:
 231                 get_remote_heads(&reader, &ref, 0, NULL, &shallow);
 232                 break;
 233         case protocol_unknown_version:
 234                 BUG("unknown protocol version");
 235         }
 236
 237         ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought,
 238                          &shallow, pack_lockfile_ptr, version);
 239         if (pack_lockfile) {
 240                 printf("lock %s\n", pack_lockfile);
 241                 fflush(stdout);
 242         }
 243         if (args.check_self_contained_and_connected &&
 244             args.self_contained_and_connected) {
 245                 printf("connectivity-ok\n");
 246                 fflush(stdout);
 247         }
 248         close(fd[0]);
 249         close(fd[1]);
 250         if (finish_connect(conn))
 251                 return 1;
 252
 253         ret = !ref;
 254
 255         /*
 256          * If the heads to pull were given, we should have consumed
 257          * all of them by matching the remote.  Otherwise, 'git fetch
 258          * remote no-such-ref' would silently succeed without issuing
 259          * an error.
 260          */
 261         ret |= report_unmatched_refs(sought, nr_sought);
 262
 263         while (ref) {
 264                 printf("%s %s\n",
 265                        oid_to_hex(&ref->old_oid), ref->name);
 266                 ref = ref->next;
 267         }
 268
 269         return ret;
 270 }