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
   8 static const char fetch_pack_usage[] =
   9 "git fetch-pack [--all] [--stdin] [--quiet|-q] [--keep|-k] [--thin] "
  10 "[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
  11 "[--no-progress] [--diag-url] [-v] [<host>:]<directory> [<refs>...]";
  12
  13 static void add_sought_entry_mem(struct ref ***sought, int *nr, int *alloc,
  14                                  const char *name, int namelen)
  15 {
  16         struct ref *ref = xcalloc(1, sizeof(*ref) + namelen + 1);
  17         unsigned char sha1[20];
  18
  19         if (namelen > 41 && name[40] == ' ' && !get_sha1_hex(name, sha1)) {
  20                 hashcpy(ref->old_sha1, sha1);
  21                 name += 41;
  22                 namelen -= 41;
  23         }
  24
  25         memcpy(ref->name, name, namelen);
  26         ref->name[namelen] = '\0';
  27         (*nr)++;
  28         ALLOC_GROW(*sought, *nr, *alloc);
  29         (*sought)[*nr - 1] = ref;
  30 }
  31
  32 static void add_sought_entry(struct ref ***sought, int *nr, int *alloc,
  33                              const char *string)
  34 {
  35         add_sought_entry_mem(sought, nr, alloc, string, strlen(string));
  36 }
  37
  38 int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
  39 {
  40         int i, ret;
  41         struct ref *ref = NULL;
  42         const char *dest = NULL;
  43         struct ref **sought = NULL;
  44         int nr_sought = 0, alloc_sought = 0;
  45         int fd[2];
  46         char *pack_lockfile = NULL;
  47         char **pack_lockfile_ptr = NULL;
  48         struct child_process *conn;
  49         struct fetch_pack_args args;
  50         struct sha1_array shallow = SHA1_ARRAY_INIT;
  51
  52         packet_trace_identity("fetch-pack");
  53
  54         memset(&args, 0, sizeof(args));
  55         args.uploadpack = "git-upload-pack";
  56
  57         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  58                 const char *arg = argv[i];
  59
  60                 if (starts_with(arg, "--upload-pack=")) {
  61                         args.uploadpack = arg + 14;
  62                         continue;
  63                 }
  64                 if (starts_with(arg, "--exec=")) {
  65                         args.uploadpack = arg + 7;
  66                         continue;
  67                 }
  68                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  69                         args.quiet = 1;
  70                         continue;
  71                 }
  72                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  73                         args.lock_pack = args.keep_pack;
  74                         args.keep_pack = 1;
  75                         continue;
  76                 }
  77                 if (!strcmp("--thin", arg)) {
  78                         args.use_thin_pack = 1;
  79                         continue;
  80                 }
  81                 if (!strcmp("--include-tag", arg)) {
  82                         args.include_tag = 1;
  83                         continue;
  84                 }
  85                 if (!strcmp("--all", arg)) {
  86                         args.fetch_all = 1;
  87                         continue;
  88                 }
  89                 if (!strcmp("--stdin", arg)) {
  90                         args.stdin_refs = 1;
  91                         continue;
  92                 }
  93                 if (!strcmp("--diag-url", arg)) {
  94                         args.diag_url = 1;
  95                         continue;
  96                 }
  97                 if (!strcmp("-v", arg)) {
  98                         args.verbose = 1;
  99                         continue;
 100                 }
 101                 if (starts_with(arg, "--depth=")) {
 102                         args.depth = strtol(arg + 8, NULL, 0);
 103                         continue;
 104                 }
 105                 if (!strcmp("--no-progress", arg)) {
 106                         args.no_progress = 1;
 107                         continue;
 108                 }
 109                 if (!strcmp("--stateless-rpc", arg)) {
 110                         args.stateless_rpc = 1;
 111                         continue;
 112                 }
 113                 if (!strcmp("--lock-pack", arg)) {
 114                         args.lock_pack = 1;
 115                         pack_lockfile_ptr = &pack_lockfile;
 116                         continue;
 117                 }
 118                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 119                         args.check_self_contained_and_connected = 1;
 120                         continue;
 121                 }
 122                 if (!strcmp("--cloning", arg)) {
 123                         args.cloning = 1;
 124                         continue;
 125                 }
 126                 if (!strcmp("--update-shallow", arg)) {
 127                         args.update_shallow = 1;
 128                         continue;
 129                 }
 130                 usage(fetch_pack_usage);
 131         }
 132
 133         if (i < argc)
 134                 dest = argv[i++];
 135         else
 136                 usage(fetch_pack_usage);
 137
 138         /*
 139          * Copy refs from cmdline to growable list, then append any
 140          * refs from the standard input:
 141          */
 142         for (; i < argc; i++)
 143                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 144         if (args.stdin_refs) {
 145                 if (args.stateless_rpc) {
 146                         /* in stateless RPC mode we use pkt-line to read
 147                          * from stdin, until we get a flush packet
 148                          */
 149                         for (;;) {
 150                                 char *line = packet_read_line(0, NULL);
 151                                 if (!line)
 152                                         break;
 153                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 154                         }
 155                 }
 156                 else {
 157                         /* read from stdin one ref per line, until EOF */
 158                         struct strbuf line = STRBUF_INIT;
 159                         while (strbuf_getline(&line, stdin, '\n') != EOF)
 160                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 161                         strbuf_release(&line);
 162                 }
 163         }
 164
 165         if (args.stateless_rpc) {
 166                 conn = NULL;
 167                 fd[0] = 0;
 168                 fd[1] = 1;
 169         } else {
 170                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 171                 if (args.diag_url)
 172                         flags |= CONNECT_DIAG_URL;
 173                 conn = git_connect(fd, dest, args.uploadpack,
 174                                    flags);
 175                 if (!conn)
 176                         return args.diag_url ? 0 : 1;
 177         }
 178         get_remote_heads(fd[0], NULL, 0, &ref, 0, NULL, &shallow);
 179
 180         ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought,
 181                          &shallow, pack_lockfile_ptr);
 182         if (pack_lockfile) {
 183                 printf("lock %s\n", pack_lockfile);
 184                 fflush(stdout);
 185         }
 186         if (args.check_self_contained_and_connected &&
 187             args.self_contained_and_connected) {
 188                 printf("connectivity-ok\n");
 189                 fflush(stdout);
 190         }
 191         close(fd[0]);
 192         close(fd[1]);
 193         if (finish_connect(conn))
 194                 return 1;
 195
 196         ret = !ref;
 197
 198         /*
 199          * If the heads to pull were given, we should have consumed
 200          * all of them by matching the remote.  Otherwise, 'git fetch
 201          * remote no-such-ref' would silently succeed without issuing
 202          * an error.
 203          */
 204         for (i = 0; i < nr_sought; i++) {
 205                 if (!sought[i] || sought[i]->matched)
 206                         continue;
 207                 error("no such remote ref %s", sought[i]->name);
 208                 ret = 1;
 209         }
 210
 211         while (ref) {
 212                 printf("%s %s\n",
 213                        sha1_to_hex(ref->old_sha1), ref->name);
 214                 ref = ref->next;
 215         }
 216
 217         return ret;
 218 }