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
  20         if (!get_oid_hex(name, &oid)) {
  21                 if (name[GIT_SHA1_HEXSZ] == ' ') {
  22                         /* <sha1> <ref>, find refname */
  23                         name += GIT_SHA1_HEXSZ + 1;
  24                 } else if (name[GIT_SHA1_HEXSZ] == '\0') {
  25                         ; /* <sha1>, leave sha1 as name */
  26                 } else {
  27                         /* <ref>, clear cruft from oid */
  28                         oidclr(&oid);
  29                 }
  30         } else {
  31                 /* <ref>, clear cruft from get_oid_hex */
  32                 oidclr(&oid);
  33         }
  34
  35         ref = alloc_ref(name);
  36         oidcpy(&ref->old_oid, &oid);
  37         (*nr)++;
  38         ALLOC_GROW(*sought, *nr, *alloc);
  39         (*sought)[*nr - 1] = ref;
  40 }
  41
  42 int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
  43 {
  44         int i, ret;
  45         struct ref *ref = NULL;
  46         const char *dest = NULL;
  47         struct ref **sought = NULL;
  48         int nr_sought = 0, alloc_sought = 0;
  49         int fd[2];
  50         char *pack_lockfile = NULL;
  51         char **pack_lockfile_ptr = NULL;
  52         struct child_process *conn;
  53         struct fetch_pack_args args;
  54         struct oid_array shallow = OID_ARRAY_INIT;
  55         struct string_list deepen_not = STRING_LIST_INIT_DUP;
  56         struct packet_reader reader;
  57
  58         fetch_if_missing = 0;
  59
  60         packet_trace_identity("fetch-pack");
  61
  62         memset(&args, 0, sizeof(args));
  63         args.uploadpack = "git-upload-pack";
  64
  65         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  66                 const char *arg = argv[i];
  67
  68                 if (skip_prefix(arg, "--upload-pack=", &arg)) {
  69                         args.uploadpack = arg;
  70                         continue;
  71                 }
  72                 if (skip_prefix(arg, "--exec=", &arg)) {
  73                         args.uploadpack = arg;
  74                         continue;
  75                 }
  76                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  77                         args.quiet = 1;
  78                         continue;
  79                 }
  80                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  81                         args.lock_pack = args.keep_pack;
  82                         args.keep_pack = 1;
  83                         continue;
  84                 }
  85                 if (!strcmp("--thin", arg)) {
  86                         args.use_thin_pack = 1;
  87                         continue;
  88                 }
  89                 if (!strcmp("--include-tag", arg)) {
  90                         args.include_tag = 1;
  91                         continue;
  92                 }
  93                 if (!strcmp("--all", arg)) {
  94                         args.fetch_all = 1;
  95                         continue;
  96                 }
  97                 if (!strcmp("--stdin", arg)) {
  98                         args.stdin_refs = 1;
  99                         continue;
 100                 }
 101                 if (!strcmp("--diag-url", arg)) {
 102                         args.diag_url = 1;
 103                         continue;
 104                 }
 105                 if (!strcmp("-v", arg)) {
 106                         args.verbose = 1;
 107                         continue;
 108                 }
 109                 if (skip_prefix(arg, "--depth=", &arg)) {
 110                         args.depth = strtol(arg, NULL, 0);
 111                         continue;
 112                 }
 113                 if (skip_prefix(arg, "--shallow-since=", &arg)) {
 114                         args.deepen_since = xstrdup(arg);
 115                         continue;
 116                 }
 117                 if (skip_prefix(arg, "--shallow-exclude=", &arg)) {
 118                         string_list_append(&deepen_not, arg);
 119                         continue;
 120                 }
 121                 if (!strcmp(arg, "--deepen-relative")) {
 122                         args.deepen_relative = 1;
 123                         continue;
 124                 }
 125                 if (!strcmp("--no-progress", arg)) {
 126                         args.no_progress = 1;
 127                         continue;
 128                 }
 129                 if (!strcmp("--stateless-rpc", arg)) {
 130                         args.stateless_rpc = 1;
 131                         continue;
 132                 }
 133                 if (!strcmp("--lock-pack", arg)) {
 134                         args.lock_pack = 1;
 135                         pack_lockfile_ptr = &pack_lockfile;
 136                         continue;
 137                 }
 138                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 139                         args.check_self_contained_and_connected = 1;
 140                         continue;
 141                 }
 142                 if (!strcmp("--cloning", arg)) {
 143                         args.cloning = 1;
 144                         continue;
 145                 }
 146                 if (!strcmp("--update-shallow", arg)) {
 147                         args.update_shallow = 1;
 148                         continue;
 149                 }
 150                 if (!strcmp("--from-promisor", arg)) {
 151                         args.from_promisor = 1;
 152                         continue;
 153                 }
 154                 if (!strcmp("--no-dependents", arg)) {
 155                         args.no_dependents = 1;
 156                         continue;
 157                 }
 158                 if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 159                         parse_list_objects_filter(&args.filter_options, arg);
 160                         continue;
 161                 }
 162                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 163                         list_objects_filter_set_no_filter(&args.filter_options);
 164                         continue;
 165                 }
 166                 usage(fetch_pack_usage);
 167         }
 168         if (deepen_not.nr)
 169                 args.deepen_not = &deepen_not;
 170
 171         if (i < argc)
 172                 dest = argv[i++];
 173         else
 174                 usage(fetch_pack_usage);
 175
 176         /*
 177          * Copy refs from cmdline to growable list, then append any
 178          * refs from the standard input:
 179          */
 180         for (; i < argc; i++)
 181                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 182         if (args.stdin_refs) {
 183                 if (args.stateless_rpc) {
 184                         /* in stateless RPC mode we use pkt-line to read
 185                          * from stdin, until we get a flush packet
 186                          */
 187                         for (;;) {
 188                                 char *line = packet_read_line(0, NULL);
 189                                 if (!line)
 190                                         break;
 191                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 192                         }
 193                 }
 194                 else {
 195                         /* read from stdin one ref per line, until EOF */
 196                         struct strbuf line = STRBUF_INIT;
 197                         while (strbuf_getline_lf(&line, stdin) != EOF)
 198                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 199                         strbuf_release(&line);
 200                 }
 201         }
 202
 203         if (args.stateless_rpc) {
 204                 conn = NULL;
 205                 fd[0] = 0;
 206                 fd[1] = 1;
 207         } else {
 208                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 209                 if (args.diag_url)
 210                         flags |= CONNECT_DIAG_URL;
 211                 conn = git_connect(fd, dest, args.uploadpack,
 212                                    flags);
 213                 if (!conn)
 214                         return args.diag_url ? 0 : 1;
 215         }
 216
 217         packet_reader_init(&reader, fd[0], NULL, 0,
 218                            PACKET_READ_CHOMP_NEWLINE |
 219                            PACKET_READ_GENTLE_ON_EOF);
 220
 221         switch (discover_version(&reader)) {
 222         case protocol_v2:
 223                 die("support for protocol v2 not implemented yet");
 224         case protocol_v1:
 225         case protocol_v0:
 226                 get_remote_heads(&reader, &ref, 0, NULL, &shallow);
 227                 break;
 228         case protocol_unknown_version:
 229                 BUG("unknown protocol version");
 230         }
 231
 232         ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought,
 233                          &shallow, pack_lockfile_ptr, protocol_v0);
 234         if (pack_lockfile) {
 235                 printf("lock %s\n", pack_lockfile);
 236                 fflush(stdout);
 237         }
 238         if (args.check_self_contained_and_connected &&
 239             args.self_contained_and_connected) {
 240                 printf("connectivity-ok\n");
 241                 fflush(stdout);
 242         }
 243         close(fd[0]);
 244         close(fd[1]);
 245         if (finish_connect(conn))
 246                 return 1;
 247
 248         ret = !ref;
 249
 250         /*
 251          * If the heads to pull were given, we should have consumed
 252          * all of them by matching the remote.  Otherwise, 'git fetch
 253          * remote no-such-ref' would silently succeed without issuing
 254          * an error.
 255          */
 256         ret |= report_unmatched_refs(sought, nr_sought);
 257
 258         while (ref) {
 259                 printf("%s %s\n",
 260                        oid_to_hex(&ref->old_oid), ref->name);
 261                 ref = ref->next;
 262         }
 263
 264         return ret;
 265 }