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