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         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_lockfiles_ptr = &pack_lockfiles;
 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 (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 157                         parse_list_objects_filter(&args.filter_options, arg);
 158                         continue;
 159                 }
 160                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 161                         list_objects_filter_set_no_filter(&args.filter_options);
 162                         continue;
 163                 }
 164                 usage(fetch_pack_usage);
 165         }
 166         if (deepen_not.nr)
 167                 args.deepen_not = &deepen_not;
 168
 169         if (i < argc)
 170                 dest = argv[i++];
 171         else
 172                 usage(fetch_pack_usage);
 173
 174         /*
 175          * Copy refs from cmdline to growable list, then append any
 176          * refs from the standard input:
 177          */
 178         for (; i < argc; i++)
 179                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 180         if (args.stdin_refs) {
 181                 if (args.stateless_rpc) {
 182                         /* in stateless RPC mode we use pkt-line to read
 183                          * from stdin, until we get a flush packet
 184                          */
 185                         for (;;) {
 186                                 char *line = packet_read_line(0, NULL);
 187                                 if (!line)
 188                                         break;
 189                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 190                         }
 191                 }
 192                 else {
 193                         /* read from stdin one ref per line, until EOF */
 194                         struct strbuf line = STRBUF_INIT;
 195                         while (strbuf_getline_lf(&line, stdin) != EOF)
 196                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 197                         strbuf_release(&line);
 198                 }
 199         }
 200
 201         if (args.stateless_rpc) {
 202                 conn = NULL;
 203                 fd[0] = 0;
 204                 fd[1] = 1;
 205         } else {
 206                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 207                 if (args.diag_url)
 208                         flags |= CONNECT_DIAG_URL;
 209                 conn = git_connect(fd, dest, args.uploadpack,
 210                                    flags);
 211                 if (!conn)
 212                         return args.diag_url ? 0 : 1;
 213         }
 214
 215         packet_reader_init(&reader, fd[0], NULL, 0,
 216                            PACKET_READ_CHOMP_NEWLINE |
 217                            PACKET_READ_GENTLE_ON_EOF |
 218                            PACKET_READ_DIE_ON_ERR_PACKET);
 219
 220         version = discover_version(&reader);
 221         switch (version) {
 222         case protocol_v2:
 223                 get_remote_refs(fd[1], &reader, &ref, 0, NULL, NULL,
 224                                 args.stateless_rpc);
 225                 break;
 226         case protocol_v1:
 227         case protocol_v0:
 228                 get_remote_heads(&reader, &ref, 0, NULL, &shallow);
 229                 break;
 230         case protocol_unknown_version:
 231                 BUG("unknown protocol version");
 232         }
 233
 234         ref = fetch_pack(&args, fd, ref, sought, nr_sought,
 235                          &shallow, pack_lockfiles_ptr, version);
 236         if (pack_lockfiles.nr) {
 237                 int i;
 238
 239                 printf("lock %s\n", pack_lockfiles.items[0].string);
 240                 fflush(stdout);
 241                 for (i = 1; i < pack_lockfiles.nr; i++)
 242                         warning(_("Lockfile created but not reported: %s"),
 243                                 pack_lockfiles.items[i].string);
 244         }
 245         if (args.check_self_contained_and_connected &&
 246             args.self_contained_and_connected) {
 247                 printf("connectivity-ok\n");
 248                 fflush(stdout);
 249         }
 250         close(fd[0]);
 251         close(fd[1]);
 252         if (finish_connect(conn))
 253                 return 1;
 254
 255         ret = !ref;
 256
 257         /*
 258          * If the heads to pull were given, we should have consumed
 259          * all of them by matching the remote.  Otherwise, 'git fetch
 260          * remote no-such-ref' would silently succeed without issuing
 261          * an error.
 262          */
 263         ret |= report_unmatched_refs(sought, nr_sought);
 264
 265         while (ref) {
 266                 printf("%s %s\n",
 267                        oid_to_hex(&ref->old_oid), ref->name);
 268                 ref = ref->next;
 269         }
 270
 271         return ret;
 272 }