ssh-pull.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "rsh.h"
   4 #include "pull.h"
   5 #include "refs.h"
   6
   7 static int fd_in;
   8 static int fd_out;
   9
  10 static unsigned char remote_version = 0;
  11 static unsigned char local_version = 1;
  12
  13 int fetch(unsigned char *sha1)
  14 {
  15         int ret;
  16         signed char remote;
  17         char type = 'o';
  18         if (has_sha1_file(sha1))
  19                 return 0;
  20         write(fd_out, &type, 1);
  21         write(fd_out, sha1, 20);
  22         if (read(fd_in, &remote, 1) < 1)
  23                 return -1;
  24         if (remote < 0)
  25                 return remote;
  26         ret = write_sha1_from_fd(sha1, fd_in);
  27         if (!ret)
  28                 pull_say("got %s\n", sha1_to_hex(sha1));
  29         return ret;
  30 }
  31
  32 int get_version(void)
  33 {
  34         char type = 'v';
  35         write(fd_out, &type, 1);
  36         write(fd_out, &local_version, 1);
  37         if (read(fd_in, &remote_version, 1) < 1) {
  38                 return error("Couldn't read version from remote end");
  39         }
  40         return 0;
  41 }
  42
  43 int fetch_ref(char *ref, unsigned char *sha1)
  44 {
  45         signed char remote;
  46         char type = 'r';
  47         write(fd_out, &type, 1);
  48         write(fd_out, ref, strlen(ref) + 1);
  49         read(fd_in, &remote, 1);
  50         if (remote < 0)
  51                 return remote;
  52         read(fd_in, sha1, 20);
  53         return 0;
  54 }
  55
  56 int main(int argc, char **argv)
  57 {
  58         char *commit_id;
  59         char *url;
  60         int arg = 1;
  61         const char *prog = getenv("GIT_SSH_PUSH") ? : "git-ssh-push";
  62
  63         while (arg < argc && argv[arg][0] == '-') {
  64                 if (argv[arg][1] == 't') {
  65                         get_tree = 1;
  66                 } else if (argv[arg][1] == 'c') {
  67                         get_history = 1;
  68                 } else if (argv[arg][1] == 'd') {
  69                         get_delta = 0;
  70                 } else if (!strcmp(argv[arg], "--recover")) {
  71                         get_delta = 2;
  72                 } else if (argv[arg][1] == 'a') {
  73                         get_all = 1;
  74                         get_tree = 1;
  75                         get_history = 1;
  76                 } else if (argv[arg][1] == 'v') {
  77                         get_verbosely = 1;
  78                 } else if (argv[arg][1] == 'w') {
  79                         write_ref = argv[arg + 1];
  80                         arg++;
  81                 }
  82                 arg++;
  83         }
  84         if (argc < arg + 2) {
  85                 usage("git-ssh-pull [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url");
  86                 return 1;
  87         }
  88         commit_id = argv[arg];
  89         url = argv[arg + 1];
  90
  91         if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
  92                 return 1;
  93
  94         if (get_version())
  95                 return 1;
  96
  97         if (pull(commit_id))
  98                 return 1;
  99
 100         return 0;
 101 }