Create pack_report() as a debugging aid.
[git] / ssh-upload.c
1 #ifndef COUNTERPART_ENV_NAME
2 #define COUNTERPART_ENV_NAME "GIT_SSH_FETCH"
3 #endif
4 #ifndef COUNTERPART_PROGRAM_NAME
5 #define COUNTERPART_PROGRAM_NAME "git-ssh-fetch"
6 #endif
7 #ifndef MY_PROGRAM_NAME
8 #define MY_PROGRAM_NAME "git-ssh-upload"
9 #endif
10
11 #include "cache.h"
12 #include "rsh.h"
13 #include "refs.h"
14
15 static unsigned char local_version = 1;
16 static unsigned char remote_version;
17
18 static int verbose;
19
20 static int serve_object(int fd_in, int fd_out) {
21         ssize_t size;
22         unsigned char sha1[20];
23         signed char remote;
24         int posn = 0;
25         do {
26                 size = read(fd_in, sha1 + posn, 20 - posn);
27                 if (size < 0) {
28                         perror("git-ssh-upload: read ");
29                         return -1;
30                 }
31                 if (!size)
32                         return -1;
33                 posn += size;
34         } while (posn < 20);
35         
36         if (verbose)
37                 fprintf(stderr, "Serving %s\n", sha1_to_hex(sha1));
38
39         remote = 0;
40         
41         if (!has_sha1_file(sha1)) {
42                 fprintf(stderr, "git-ssh-upload: could not find %s\n",
43                         sha1_to_hex(sha1));
44                 remote = -1;
45         }
46         
47         write(fd_out, &remote, 1);
48         
49         if (remote < 0)
50                 return 0;
51         
52         return write_sha1_to_fd(fd_out, sha1);
53 }
54
55 static int serve_version(int fd_in, int fd_out)
56 {
57         if (read(fd_in, &remote_version, 1) < 1)
58                 return -1;
59         write(fd_out, &local_version, 1);
60         return 0;
61 }
62
63 static int serve_ref(int fd_in, int fd_out)
64 {
65         char ref[PATH_MAX];
66         unsigned char sha1[20];
67         int posn = 0;
68         signed char remote = 0;
69         do {
70                 if (read(fd_in, ref + posn, 1) < 1)
71                         return -1;
72                 posn++;
73         } while (ref[posn - 1]);
74
75         if (verbose)
76                 fprintf(stderr, "Serving %s\n", ref);
77
78         if (get_ref_sha1(ref, sha1))
79                 remote = -1;
80         write(fd_out, &remote, 1);
81         if (remote)
82                 return 0;
83         write(fd_out, sha1, 20);
84         return 0;
85 }
86
87
88 static void service(int fd_in, int fd_out) {
89         char type;
90         int retval;
91         do {
92                 retval = read(fd_in, &type, 1);
93                 if (retval < 1) {
94                         if (retval < 0)
95                                 perror("git-ssh-upload: read ");
96                         return;
97                 }
98                 if (type == 'v' && serve_version(fd_in, fd_out))
99                         return;
100                 if (type == 'o' && serve_object(fd_in, fd_out))
101                         return;
102                 if (type == 'r' && serve_ref(fd_in, fd_out))
103                         return;
104         } while (1);
105 }
106
107 static const char ssh_push_usage[] =
108         MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url";
109
110 int main(int argc, char **argv)
111 {
112         int arg = 1;
113         char *commit_id;
114         char *url;
115         int fd_in, fd_out;
116         const char *prog;
117         unsigned char sha1[20];
118         char hex[41];
119
120         prog = getenv(COUNTERPART_ENV_NAME);
121         if (!prog) prog = COUNTERPART_PROGRAM_NAME;
122
123         setup_git_directory();
124
125         while (arg < argc && argv[arg][0] == '-') {
126                 if (argv[arg][1] == 'w')
127                         arg++;
128                 arg++;
129         }
130         if (argc < arg + 2)
131                 usage(ssh_push_usage);
132         commit_id = argv[arg];
133         url = argv[arg + 1];
134         if (get_sha1(commit_id, sha1))
135                 die("Not a valid object name %s", commit_id);
136         memcpy(hex, sha1_to_hex(sha1), sizeof(hex));
137         argv[arg] = hex;
138
139         if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
140                 return 1;
141
142         service(fd_in, fd_out);
143         return 0;
144 }