builtin/fetch-pack.c

   1 #include "builtin.h"
   2 #include "pkt-line.h"
   3 #include "fetch-pack.h"
   4
   5 static const char fetch_pack_usage[] =
   6 "git fetch-pack [--all] [--stdin] [--quiet|-q] [--keep|-k] [--thin] "
   7 "[--include-tag] [--upload-pack=<git-upload-pack>] [--depth=<n>] "
   8 "[--no-progress] [-v] [<host>:]<directory> [<refs>...]";
   9
  10 static void add_sought_entry_mem(struct ref ***sought, int *nr, int *alloc,
  11                                  const char *name, int namelen)
  12 {
  13         struct ref *ref = xcalloc(1, sizeof(*ref) + namelen + 1);
  14
  15         memcpy(ref->name, name, namelen);
  16         ref->name[namelen] = '\0';
  17         (*nr)++;
  18         ALLOC_GROW(*sought, *nr, *alloc);
  19         (*sought)[*nr - 1] = ref;
  20 }
  21
  22 static void add_sought_entry(struct ref ***sought, int *nr, int *alloc,
  23                              const char *string)
  24 {
  25         add_sought_entry_mem(sought, nr, alloc, string, strlen(string));
  26 }
  27
  28 int cmd_fetch_pack(int argc, const char **argv, const char *prefix)
  29 {
  30         int i, ret;
  31         struct ref *ref = NULL;
  32         const char *dest = NULL;
  33         struct ref **sought = NULL;
  34         int nr_sought = 0, alloc_sought = 0;
  35         int fd[2];
  36         char *pack_lockfile = NULL;
  37         char **pack_lockfile_ptr = NULL;
  38         struct child_process *conn;
  39         struct fetch_pack_args args;
  40
  41         packet_trace_identity("fetch-pack");
  42
  43         memset(&args, 0, sizeof(args));
  44         args.uploadpack = "git-upload-pack";
  45
  46         for (i = 1; i < argc && *argv[i] == '-'; i++) {
  47                 const char *arg = argv[i];
  48
  49                 if (!prefixcmp(arg, "--upload-pack=")) {
  50                         args.uploadpack = arg + 14;
  51                         continue;
  52                 }
  53                 if (!prefixcmp(arg, "--exec=")) {
  54                         args.uploadpack = arg + 7;
  55                         continue;
  56                 }
  57                 if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
  58                         args.quiet = 1;
  59                         continue;
  60                 }
  61                 if (!strcmp("--keep", arg) || !strcmp("-k", arg)) {
  62                         args.lock_pack = args.keep_pack;
  63                         args.keep_pack = 1;
  64                         continue;
  65                 }
  66                 if (!strcmp("--thin", arg)) {
  67                         args.use_thin_pack = 1;
  68                         continue;
  69                 }
  70                 if (!strcmp("--include-tag", arg)) {
  71                         args.include_tag = 1;
  72                         continue;
  73                 }
  74                 if (!strcmp("--all", arg)) {
  75                         args.fetch_all = 1;
  76                         continue;
  77                 }
  78                 if (!strcmp("--stdin", arg)) {
  79                         args.stdin_refs = 1;
  80                         continue;
  81                 }
  82                 if (!strcmp("-v", arg)) {
  83                         args.verbose = 1;
  84                         continue;
  85                 }
  86                 if (!prefixcmp(arg, "--depth=")) {
  87                         args.depth = strtol(arg + 8, NULL, 0);
  88                         continue;
  89                 }
  90                 if (!strcmp("--no-progress", arg)) {
  91                         args.no_progress = 1;
  92                         continue;
  93                 }
  94                 if (!strcmp("--stateless-rpc", arg)) {
  95                         args.stateless_rpc = 1;
  96                         continue;
  97                 }
  98                 if (!strcmp("--lock-pack", arg)) {
  99                         args.lock_pack = 1;
 100                         pack_lockfile_ptr = &pack_lockfile;
 101                         continue;
 102                 }
 103                 usage(fetch_pack_usage);
 104         }
 105
 106         if (i < argc)
 107                 dest = argv[i++];
 108         else
 109                 usage(fetch_pack_usage);
 110
 111         /*
 112          * Copy refs from cmdline to growable list, then append any
 113          * refs from the standard input:
 114          */
 115         for (; i < argc; i++)
 116                 add_sought_entry(&sought, &nr_sought, &alloc_sought, argv[i]);
 117         if (args.stdin_refs) {
 118                 if (args.stateless_rpc) {
 119                         /* in stateless RPC mode we use pkt-line to read
 120                          * from stdin, until we get a flush packet
 121                          */
 122                         static char line[1000];
 123                         for (;;) {
 124                                 int n = packet_read_line(0, line, sizeof(line));
 125                                 if (!n)
 126                                         break;
 127                                 if (line[n-1] == '\n')
 128                                         n--;
 129                                 add_sought_entry_mem(&sought, &nr_sought,  &alloc_sought, line, n);
 130                         }
 131                 }
 132                 else {
 133                         /* read from stdin one ref per line, until EOF */
 134                         struct strbuf line = STRBUF_INIT;
 135                         while (strbuf_getline(&line, stdin, '\n') != EOF)
 136                                 add_sought_entry(&sought, &nr_sought, &alloc_sought, line.buf);
 137                         strbuf_release(&line);
 138                 }
 139         }
 140
 141         if (args.stateless_rpc) {
 142                 conn = NULL;
 143                 fd[0] = 0;
 144                 fd[1] = 1;
 145         } else {
 146                 conn = git_connect(fd, dest, args.uploadpack,
 147                                    args.verbose ? CONNECT_VERBOSE : 0);
 148         }
 149
 150         get_remote_heads(fd[0], &ref, 0, NULL);
 151
 152         ref = fetch_pack(&args, fd, conn, ref, dest,
 153                          sought, nr_sought, pack_lockfile_ptr);
 154         if (pack_lockfile) {
 155                 printf("lock %s\n", pack_lockfile);
 156                 fflush(stdout);
 157         }
 158         close(fd[0]);
 159         close(fd[1]);
 160         if (finish_connect(conn))
 161                 return 1;
 162
 163         ret = !ref;
 164
 165         /*
 166          * If the heads to pull were given, we should have consumed
 167          * all of them by matching the remote.  Otherwise, 'git fetch
 168          * remote no-such-ref' would silently succeed without issuing
 169          * an error.
 170          */
 171         for (i = 0; i < nr_sought; i++) {
 172                 if (!sought[i] || sought[i]->matched)
 173                         continue;
 174                 error("no such remote ref %s", sought[i]->name);
 175                 ret = 1;
 176         }
 177
 178         while (ref) {
 179                 printf("%s %s\n",
 180                        sha1_to_hex(ref->old_sha1), ref->name);
 181                 ref = ref->next;
 182         }
 183
 184         return ret;
 185 }