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
  59         fetch_if_missing = 0;
  60
  61         packet_trace_identity("fetch-pack");
  62
  63         memset(&args, 0, sizeof(args));
  64         args.uploadpack = "git-upload-pack";
  65
  66         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  67                 const char *arg = argv[i];
  68
  69                 if (skip_prefix(arg, "--upload-pack=", &arg)) {
  70                         args.uploadpack = arg;
  71                         continue;
  72                 }
  73                 if (skip_prefix(arg, "--exec=", &arg)) {
  74                         args.uploadpack = arg;
  75                         continue;
  76                 }
  77                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  78                         args.quiet = 1;
  79                         continue;
  80                 }
  81                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  82                         args.lock_pack = args.keep_pack;
  83                         args.keep_pack = 1;
  84                         continue;
  85                 }
  86                 if (!strcmp("--thin", arg)) {
  87                         args.use_thin_pack = 1;
  88                         continue;
  89                 }
  90                 if (!strcmp("--include-tag", arg)) {
  91                         args.include_tag = 1;
  92                         continue;
  93                 }
  94                 if (!strcmp("--all", arg)) {
  95                         args.fetch_all = 1;
  96                         continue;
  97                 }
  98                 if (!strcmp("--stdin", arg)) {
  99                         args.stdin_refs = 1;
 100                         continue;
 101                 }
 102                 if (!strcmp("--diag-url", arg)) {
 103                         args.diag_url = 1;
 104                         continue;
 105                 }
 106                 if (!strcmp("-v", arg)) {
 107                         args.verbose = 1;
 108                         continue;
 109                 }
 110                 if (skip_prefix(arg, "--depth=", &arg)) {
 111                         args.depth = strtol(arg, NULL, 0);
 112                         continue;
 113                 }
 114                 if (skip_prefix(arg, "--shallow-since=", &arg)) {
 115                         args.deepen_since = xstrdup(arg);
 116                         continue;
 117                 }
 118                 if (skip_prefix(arg, "--shallow-exclude=", &arg)) {
 119                         string_list_append(&deepen_not, arg);
 120                         continue;
 121                 }
 122                 if (!strcmp(arg, "--deepen-relative")) {
 123                         args.deepen_relative = 1;
 124                         continue;
 125                 }
 126                 if (!strcmp("--no-progress", arg)) {
 127                         args.no_progress = 1;
 128                         continue;
 129                 }
 130                 if (!strcmp("--stateless-rpc", arg)) {
 131                         args.stateless_rpc = 1;
 132                         continue;
 133                 }
 134                 if (!strcmp("--lock-pack", arg)) {
 135                         args.lock_pack = 1;
 136                         pack_lockfile_ptr = &pack_lockfile;
 137                         continue;
 138                 }
 139                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 140                         args.check_self_contained_and_connected = 1;
 141                         continue;
 142                 }
 143                 if (!strcmp("--cloning", arg)) {
 144                         args.cloning = 1;
 145                         continue;
 146                 }
 147                 if (!strcmp("--update-shallow", arg)) {
 148                         args.update_shallow = 1;
 149                         continue;
 150                 }
 151                 if (!strcmp("--from-promisor", arg)) {
 152                         args.from_promisor = 1;
 153                         continue;
 154                 }
 155                 if (!strcmp("--no-dependents", arg)) {
 156                         args.no_dependents = 1;
 157                         continue;
 158                 }
 159                 if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 160                         parse_list_objects_filter(&args.filter_options, arg);
 161                         continue;
 162                 }
 163                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 164                         list_objects_filter_set_no_filter(&args.filter_options);
 165                         continue;
 166                 }
 167                 usage(fetch_pack_usage);
 168         }
 169         if (deepen_not.nr)
 170                 args.deepen_not = &deepen_not;
 171
 172         if (i < argc)
 173                 dest = argv[i++];
 174         else
 175                 usage(fetch_pack_usage);
 176
 177         /*
 178          * Copy refs from cmdline to growable list, then append any
 179          * refs from the standard input:
 180          */
 181         for (; i < argc; i++)
 182                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 183         if (args.stdin_refs) {
 184                 if (args.stateless_rpc) {
 185                         /* in stateless RPC mode we use pkt-line to read
 186                          * from stdin, until we get a flush packet
 187                          */
 188                         for (;;) {
 189                                 char *line = packet_read_line(0, NULL);
 190                                 if (!line)
 191                                         break;
 192                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 193                         }
 194                 }
 195                 else {
 196                         /* read from stdin one ref per line, until EOF */
 197                         struct strbuf line = STRBUF_INIT;
 198                         while (strbuf_getline_lf(&line, stdin) != EOF)
 199                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 200                         strbuf_release(&line);
 201                 }
 202         }
 203
 204         if (args.stateless_rpc) {
 205                 conn = NULL;
 206                 fd[0] = 0;
 207                 fd[1] = 1;
 208         } else {
 209                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 210                 if (args.diag_url)
 211                         flags |= CONNECT_DIAG_URL;
 212                 conn = git_connect(fd, dest, args.uploadpack,
 213                                    flags);
 214                 if (!conn)
 215                         return args.diag_url ? 0 : 1;
 216         }
 217
 218         packet_reader_init(&reader, fd[0], NULL, 0,
 219                            PACKET_READ_CHOMP_NEWLINE |
 220                            PACKET_READ_GENTLE_ON_EOF |
 221                            PACKET_READ_DIE_ON_ERR_PACKET);
 222
 223         switch (discover_version(&reader)) {
 224         case protocol_v2:
 225                 die("support for protocol v2 not implemented yet");
 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, conn, ref, dest, sought, nr_sought,
 235                          &shallow, pack_lockfile_ptr, protocol_v0);
 236         if (pack_lockfile) {
 237                 printf("lock %s\n", pack_lockfile);
 238                 fflush(stdout);
 239         }
 240         if (args.check_self_contained_and_connected &&
 241             args.self_contained_and_connected) {
 242                 printf("connectivity-ok\n");
 243                 fflush(stdout);
 244         }
 245         close(fd[0]);
 246         close(fd[1]);
 247         if (finish_connect(conn))
 248                 return 1;
 249
 250         ret = !ref;
 251
 252         /*
 253          * If the heads to pull were given, we should have consumed
 254          * all of them by matching the remote.  Otherwise, 'git fetch
 255          * remote no-such-ref' would silently succeed without issuing
 256          * an error.
 257          */
 258         ret |= report_unmatched_refs(sought, nr_sought);
 259
 260         while (ref) {
 261                 printf("%s %s\n",
 262                        oid_to_hex(&ref->old_oid), ref->name);
 263                 ref = ref->next;
 264         }
 265
 266         return ret;
 267 }