Do a cross-project merge of Paul Mackerras' gitk visualizer
[git/git.git] / 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 }