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(struct ref ***sought, int *nr, int *alloc,
  14                              const char *name)
  15 {
  16         struct ref *ref;
  17         struct object_id oid;
  18
  19         if (!get_oid_hex(name, &oid)) {
  20                 if (name[GIT_SHA1_HEXSZ] == ' ') {
  21                         /* <sha1> <ref>, find refname */
  22                         name += GIT_SHA1_HEXSZ + 1;
  23                 } else if (name[GIT_SHA1_HEXSZ] == '\0') {
  24                         ; /* <sha1>, leave sha1 as name */
  25                 } else {
  26                         /* <ref>, clear cruft from oid */
  27                         oidclr(&oid);
  28                 }
  29         } else {
  30                 /* <ref>, clear cruft from get_oid_hex */
  31                 oidclr(&oid);
  32         }
  33
  34         ref = alloc_ref(name);
  35         oidcpy(&ref->old_oid, &oid);
  36         (*nr)++;
  37         ALLOC_GROW(*sought, *nr, *alloc);
  38         (*sought)[*nr - 1] = ref;
  39 }
  40
  41 int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
  42 {
  43         int i, ret;
  44         struct ref *ref = NULL;
  45         const char *dest = NULL;
  46         struct ref **sought = NULL;
  47         int nr_sought = 0, alloc_sought = 0;
  48         int fd[2];
  49         char *pack_lockfile = NULL;
  50         char **pack_lockfile_ptr = NULL;
  51         struct child_process *conn;
  52         struct fetch_pack_args args;
  53         struct sha1_array shallow = SHA1_ARRAY_INIT;
  54
  55         packet_trace_identity("fetch-pack");
  56
  57         memset(&args, 0, sizeof(args));
  58         args.uploadpack = "git-upload-pack";
  59
  60         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  61                 const char *arg = argv[i];
  62
  63                 if (starts_with(arg, "--upload-pack=")) {
  64                         args.uploadpack = arg + 14;
  65                         continue;
  66                 }
  67                 if (starts_with(arg, "--exec=")) {
  68                         args.uploadpack = arg + 7;
  69                         continue;
  70                 }
  71                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  72                         args.quiet = 1;
  73                         continue;
  74                 }
  75                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  76                         args.lock_pack = args.keep_pack;
  77                         args.keep_pack = 1;
  78                         continue;
  79                 }
  80                 if (!strcmp("--thin", arg)) {
  81                         args.use_thin_pack = 1;
  82                         continue;
  83                 }
  84                 if (!strcmp("--include-tag", arg)) {
  85                         args.include_tag = 1;
  86                         continue;
  87                 }
  88                 if (!strcmp("--all", arg)) {
  89                         args.fetch_all = 1;
  90                         continue;
  91                 }
  92                 if (!strcmp("--stdin", arg)) {
  93                         args.stdin_refs = 1;
  94                         continue;
  95                 }
  96                 if (!strcmp("--diag-url", arg)) {
  97                         args.diag_url = 1;
  98                         continue;
  99                 }
 100                 if (!strcmp("-v", arg)) {
 101                         args.verbose = 1;
 102                         continue;
 103                 }
 104                 if (starts_with(arg, "--depth=")) {
 105                         args.depth = strtol(arg + 8, NULL, 0);
 106                         continue;
 107                 }
 108                 if (!strcmp("--no-progress", arg)) {
 109                         args.no_progress = 1;
 110                         continue;
 111                 }
 112                 if (!strcmp("--stateless-rpc", arg)) {
 113                         args.stateless_rpc = 1;
 114                         continue;
 115                 }
 116                 if (!strcmp("--lock-pack", arg)) {
 117                         args.lock_pack = 1;
 118                         pack_lockfile_ptr = &pack_lockfile;
 119                         continue;
 120                 }
 121                 if (!strcmp("--check-self-contained-and-connected", arg)) {
 122                         args.check_self_contained_and_connected = 1;
 123                         continue;
 124                 }
 125                 if (!strcmp("--cloning", arg)) {
 126                         args.cloning = 1;
 127                         continue;
 128                 }
 129                 if (!strcmp("--update-shallow", arg)) {
 130                         args.update_shallow = 1;
 131                         continue;
 132                 }
 133                 usage(fetch_pack_usage);
 134         }
 135
 136         if (i < argc)
 137                 dest = argv[i++];
 138         else
 139                 usage(fetch_pack_usage);
 140
 141         /*
 142          * Copy refs from cmdline to growable list, then append any
 143          * refs from the standard input:
 144          */
 145         for (; i < argc; i++)
 146                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 147         if (args.stdin_refs) {
 148                 if (args.stateless_rpc) {
 149                         /* in stateless RPC mode we use pkt-line to read
 150                          * from stdin, until we get a flush packet
 151                          */
 152                         for (;;) {
 153                                 char *line = packet_read_line(0, NULL);
 154                                 if (!line)
 155                                         break;
 156                                 add_sought_entry(&sought, &nr_sought,  &alloc_sought, line);
 157                         }
 158                 }
 159                 else {
 160                         /* read from stdin one ref per line, until EOF */
 161                         struct strbuf line = STRBUF_INIT;
 162                         while (strbuf_getline_lf(&line, stdin) != EOF)
 163                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 164                         strbuf_release(&line);
 165                 }
 166         }
 167
 168         if (args.stateless_rpc) {
 169                 conn = NULL;
 170                 fd[0] = 0;
 171                 fd[1] = 1;
 172         } else {
 173                 int flags = args.verbose ? CONNECT_VERBOSE : 0;
 174                 if (args.diag_url)
 175                         flags |= CONNECT_DIAG_URL;
 176                 conn = git_connect(fd, dest, args.uploadpack,
 177                                    flags);
 178                 if (!conn)
 179                         return args.diag_url ? 0 : 1;
 180         }
 181         get_remote_heads(fd[0], NULL, 0, &ref, 0, NULL, &shallow);
 182
 183         ref = fetch_pack(&args, fd, conn, ref, dest, sought, nr_sought,
 184                          &shallow, pack_lockfile_ptr);
 185         if (pack_lockfile) {
 186                 printf("lock %s\n", pack_lockfile);
 187                 fflush(stdout);
 188         }
 189         if (args.check_self_contained_and_connected &&
 190             args.self_contained_and_connected) {
 191                 printf("connectivity-ok\n");
 192                 fflush(stdout);
 193         }
 194         close(fd[0]);
 195         close(fd[1]);
 196         if (finish_connect(conn))
 197                 return 1;
 198
 199         ret = !ref;
 200
 201         /*
 202          * If the heads to pull were given, we should have consumed
 203          * all of them by matching the remote.  Otherwise, 'git fetch
 204          * remote no-such-ref' would silently succeed without issuing
 205          * an error.
 206          */
 207         for (i = 0; i < nr_sought; i++) {
 208                 if (!sought[i] || sought[i]->matched)
 209                         continue;
 210                 error("no such remote ref %s", sought[i]->name);
 211                 ret = 1;
 212         }
 213
 214         while (ref) {
 215                 printf("%s %s\n",
 216                        oid_to_hex(&ref->old_oid), ref->name);
 217                 ref = ref->next;
 218         }
 219
 220         return ret;
 221 }