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Commit | Line | Data |
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f71a69ab JH |
1 | #ifndef COUNTERPART_ENV_NAME |
2 | #define COUNTERPART_ENV_NAME "GIT_SSH_UPLOAD" | |
3 | #endif | |
4 | #ifndef COUNTERPART_PROGRAM_NAME | |
5 | #define COUNTERPART_PROGRAM_NAME "git-ssh-upload" | |
6 | #endif | |
7 | #ifndef MY_PROGRAM_NAME | |
8 | #define MY_PROGRAM_NAME "git-ssh-fetch" | |
9 | #endif | |
10 | ||
6eb7ed54 DB |
11 | #include "cache.h" |
12 | #include "commit.h" | |
6eb7ed54 | 13 | #include "rsh.h" |
215a7ad1 | 14 | #include "fetch.h" |
c7c4bbe6 | 15 | #include "refs.h" |
6eb7ed54 DB |
16 | |
17 | static int fd_in; | |
18 | static int fd_out; | |
19 | ||
96f1e58f | 20 | static unsigned char remote_version; |
dba385bb DB |
21 | static unsigned char local_version = 1; |
22 | ||
96f1e58f | 23 | static int prefetches; |
70a0c6fe | 24 | |
96f1e58f | 25 | static struct object_list *in_transit; |
70a0c6fe DB |
26 | static struct object_list **end_of_transit = &in_transit; |
27 | ||
1e8be59d DB |
28 | void prefetch(unsigned char *sha1) |
29 | { | |
70b9829e | 30 | char type = 'o'; |
70a0c6fe DB |
31 | struct object_list *node; |
32 | if (prefetches > 100) { | |
33 | fetch(in_transit->item->sha1); | |
34 | } | |
35 | node = xmalloc(sizeof(struct object_list)); | |
36 | node->next = NULL; | |
37 | node->item = lookup_unknown_object(sha1); | |
38 | *end_of_transit = node; | |
39 | end_of_transit = &node->next; | |
93822c22 AW |
40 | /* XXX: what if these writes fail? */ |
41 | write_in_full(fd_out, &type, 1); | |
42 | write_in_full(fd_out, sha1, 20); | |
70a0c6fe | 43 | prefetches++; |
1e8be59d DB |
44 | } |
45 | ||
70b9829e | 46 | static char conn_buf[4096]; |
96f1e58f | 47 | static size_t conn_buf_posn; |
70b9829e | 48 | |
4250a5e5 | 49 | int fetch(unsigned char *sha1) |
6eb7ed54 | 50 | { |
e78d9772 | 51 | int ret; |
dba385bb | 52 | signed char remote; |
70a0c6fe DB |
53 | struct object_list *temp; |
54 | ||
a89fccd2 | 55 | if (hashcmp(sha1, in_transit->item->sha1)) { |
a9486b02 | 56 | /* we must have already fetched it to clean the queue */ |
70a0c6fe DB |
57 | return has_sha1_file(sha1) ? 0 : -1; |
58 | } | |
59 | prefetches--; | |
60 | temp = in_transit; | |
61 | in_transit = in_transit->next; | |
62 | if (!in_transit) | |
63 | end_of_transit = &in_transit; | |
64 | free(temp); | |
70b9829e DB |
65 | |
66 | if (conn_buf_posn) { | |
67 | remote = conn_buf[0]; | |
68 | memmove(conn_buf, conn_buf + 1, --conn_buf_posn); | |
69 | } else { | |
93d26e4c | 70 | if (xread(fd_in, &remote, 1) < 1) |
70b9829e DB |
71 | return -1; |
72 | } | |
a9486b02 | 73 | /* fprintf(stderr, "Got %d\n", remote); */ |
dba385bb DB |
74 | if (remote < 0) |
75 | return remote; | |
70b9829e | 76 | ret = write_sha1_from_fd(sha1, fd_in, conn_buf, 4096, &conn_buf_posn); |
e78d9772 JH |
77 | if (!ret) |
78 | pull_say("got %s\n", sha1_to_hex(sha1)); | |
79 | return ret; | |
6eb7ed54 DB |
80 | } |
81 | ||
6da4016a | 82 | static int get_version(void) |
dba385bb DB |
83 | { |
84 | char type = 'v'; | |
93822c22 AW |
85 | if (write_in_full(fd_out, &type, 1) != 1 || |
86 | write_in_full(fd_out, &local_version, 1)) { | |
87 | return error("Couldn't request version from remote end"); | |
88 | } | |
93d26e4c | 89 | if (xread(fd_in, &remote_version, 1) < 1) { |
dba385bb DB |
90 | return error("Couldn't read version from remote end"); |
91 | } | |
92 | return 0; | |
93 | } | |
94 | ||
cd541a68 DB |
95 | int fetch_ref(char *ref, unsigned char *sha1) |
96 | { | |
c7c4bbe6 DB |
97 | signed char remote; |
98 | char type = 'r'; | |
93822c22 AW |
99 | int length = strlen(ref) + 1; |
100 | if (write_in_full(fd_out, &type, 1) != 1 || | |
101 | write_in_full(fd_out, ref, length) != length) | |
102 | return -1; | |
93d26e4c AW |
103 | |
104 | if (read_in_full(fd_in, &remote, 1) != 1) | |
105 | return -1; | |
c7c4bbe6 DB |
106 | if (remote < 0) |
107 | return remote; | |
93d26e4c AW |
108 | if (read_in_full(fd_in, sha1, 20) != 20) |
109 | return -1; | |
c7c4bbe6 | 110 | return 0; |
cd541a68 DB |
111 | } |
112 | ||
f71a69ab JH |
113 | static const char ssh_fetch_usage[] = |
114 | MY_PROGRAM_NAME | |
cc41cd2e | 115 | " [-c] [-t] [-a] [-v] [--recover] [-w ref] commit-id url"; |
6eb7ed54 DB |
116 | int main(int argc, char **argv) |
117 | { | |
c6b69bdb | 118 | const char *write_ref = NULL; |
6eb7ed54 DB |
119 | char *commit_id; |
120 | char *url; | |
121 | int arg = 1; | |
c7c81b3a JR |
122 | const char *prog; |
123 | ||
124 | prog = getenv("GIT_SSH_PUSH"); | |
215a7ad1 | 125 | if (!prog) prog = "git-ssh-upload"; |
6eb7ed54 | 126 | |
5a327713 | 127 | setup_git_directory(); |
d0740d92 | 128 | git_config(git_default_config); |
5a327713 | 129 | |
6eb7ed54 DB |
130 | while (arg < argc && argv[arg][0] == '-') { |
131 | if (argv[arg][1] == 't') { | |
4250a5e5 | 132 | get_tree = 1; |
6eb7ed54 | 133 | } else if (argv[arg][1] == 'c') { |
4250a5e5 | 134 | get_history = 1; |
6eb7ed54 | 135 | } else if (argv[arg][1] == 'a') { |
4250a5e5 DB |
136 | get_all = 1; |
137 | get_tree = 1; | |
138 | get_history = 1; | |
e78d9772 JH |
139 | } else if (argv[arg][1] == 'v') { |
140 | get_verbosely = 1; | |
c7c4bbe6 DB |
141 | } else if (argv[arg][1] == 'w') { |
142 | write_ref = argv[arg + 1]; | |
143 | arg++; | |
820eca68 DB |
144 | } else if (!strcmp(argv[arg], "--recover")) { |
145 | get_recover = 1; | |
6eb7ed54 DB |
146 | } |
147 | arg++; | |
148 | } | |
149 | if (argc < arg + 2) { | |
f71a69ab | 150 | usage(ssh_fetch_usage); |
6eb7ed54 DB |
151 | return 1; |
152 | } | |
153 | commit_id = argv[arg]; | |
154 | url = argv[arg + 1]; | |
155 | ||
001d4a27 | 156 | if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1)) |
6eb7ed54 DB |
157 | return 1; |
158 | ||
dba385bb DB |
159 | if (get_version()) |
160 | return 1; | |
161 | ||
4211e4d1 | 162 | if (pull(1, &commit_id, &write_ref, url)) |
6eb7ed54 DB |
163 | return 1; |
164 | ||
165 | return 0; | |
166 | } |