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