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chromium / external / github.com / git / git / refs/tags/v0.99.9c / . / ssh-fetch.c
blob: bf01fbc00d649231cb7ba49aba9432afe570b319 [file] [log] [blame]
Junio C Hamanof71a69a2005-09-15 21:56:37[diff] [blame]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
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]11#include "cache.h"
12#include "commit.h"
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]13#include "rsh.h"
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]14#include "fetch.h"
Daniel Barkalowc7c4bbe2005-06-06 20:43:27[diff] [blame]15#include "refs.h"
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]16
17static int fd_in;
18static int fd_out;
19
Daniel Barkalowdba385b2005-06-03 21:43:52[diff] [blame]20static unsigned char remote_version = 0;
21static unsigned char local_version = 1;
22
Alecs King635d37a2005-08-04 03:35:37[diff] [blame]23static ssize_t force_write(int fd, void *buffer, size_t length)
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]24{
25 ssize_t ret = 0;
26 while (ret < length) {
27 ssize_t size = write(fd, buffer + ret, length - ret);
28 if (size < 0) {
29 return size;
30 }
31 if (size == 0) {
32 return ret;
33 }
34 ret += size;
35 }
36 return ret;
37}
38
Daniel Barkalow70a0c6f2005-10-04 04:24:55[diff] [blame]39static int prefetches = 0;
40
41static struct object_list *in_transit = NULL;
42static struct object_list **end_of_transit = &in_transit;
43
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]44void prefetch(unsigned char *sha1)
45{
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]46 char type = 'o';
Daniel Barkalow70a0c6f2005-10-04 04:24:55[diff] [blame]47 struct object_list *node;
48 if (prefetches > 100) {
49 fetch(in_transit->item->sha1);
50 }
51 node = xmalloc(sizeof(struct object_list));
52 node->next = NULL;
53 node->item = lookup_unknown_object(sha1);
54 *end_of_transit = node;
55 end_of_transit = &node->next;
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]56 force_write(fd_out, &type, 1);
57 force_write(fd_out, sha1, 20);
Daniel Barkalow70a0c6f2005-10-04 04:24:55[diff] [blame]58 prefetches++;
barkalow@iabervon.org1e8be592005-08-02 23:46:10[diff] [blame]59}
60
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]61static char conn_buf[4096];
62static size_t conn_buf_posn = 0;
63
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]64int fetch(unsigned char *sha1)
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]65{
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]66 int ret;
Daniel Barkalowdba385b2005-06-03 21:43:52[diff] [blame]67 signed char remote;
Daniel Barkalow70a0c6f2005-10-04 04:24:55[diff] [blame]68 struct object_list *temp;
69
70 if (memcmp(sha1, in_transit->item->sha1, 20)) {
71 // we must have already fetched it to clean the queue
72 return has_sha1_file(sha1) ? 0 : -1;
73 }
74 prefetches--;
75 temp = in_transit;
76 in_transit = in_transit->next;
77 if (!in_transit)
78 end_of_transit = &in_transit;
79 free(temp);
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]80
81 if (conn_buf_posn) {
82 remote = conn_buf[0];
83 memmove(conn_buf, conn_buf + 1, --conn_buf_posn);
84 } else {
85 if (read(fd_in, &remote, 1) < 1)
86 return -1;
87 }
88 //fprintf(stderr, "Got %d\n", remote);
Daniel Barkalowdba385b2005-06-03 21:43:52[diff] [blame]89 if (remote < 0)
90 return remote;
barkalow@iabervon.org70b98292005-08-02 23:46:29[diff] [blame]91 ret = write_sha1_from_fd(sha1, fd_in, conn_buf, 4096, &conn_buf_posn);
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]92 if (!ret)
93 pull_say("got %s\n", sha1_to_hex(sha1));
94 return ret;
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]95}
96
Linus Torvalds6da40162005-07-03 17:10:45[diff] [blame]97static int get_version(void)
Daniel Barkalowdba385b2005-06-03 21:43:52[diff] [blame]98{
99 char type = 'v';
100 write(fd_out, &type, 1);
101 write(fd_out, &local_version, 1);
102 if (read(fd_in, &remote_version, 1) < 1) {
103 return error("Couldn't read version from remote end");
104 }
105 return 0;
106}
107
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]108int fetch_ref(char *ref, unsigned char *sha1)
109{
Daniel Barkalowc7c4bbe2005-06-06 20:43:27[diff] [blame]110 signed char remote;
111 char type = 'r';
112 write(fd_out, &type, 1);
113 write(fd_out, ref, strlen(ref) + 1);
114 read(fd_in, &remote, 1);
115 if (remote < 0)
116 return remote;
117 read(fd_in, sha1, 20);
118 return 0;
Daniel Barkalowcd541a62005-06-06 20:38:26[diff] [blame]119}
120
Junio C Hamanof71a69a2005-09-15 21:56:37[diff] [blame]121static const char ssh_fetch_usage[] =
122 MY_PROGRAM_NAME
123 " [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url";
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]124int main(int argc, char **argv)
125{
126 char *commit_id;
127 char *url;
128 int arg = 1;
Jason Riedyc7c81b32005-08-23 20:34:07[diff] [blame]129 const char *prog;
130
131 prog = getenv("GIT_SSH_PUSH");
Junio C Hamano215a7ad2005-09-08 00:26:23[diff] [blame]132 if (!prog) prog = "git-ssh-upload";
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]133
134 while (arg < argc && argv[arg][0] == '-') {
135 if (argv[arg][1] == 't') {
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]136 get_tree = 1;
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]137 } else if (argv[arg][1] == 'c') {
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]138 get_history = 1;
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]139 } else if (argv[arg][1] == 'a') {
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]140 get_all = 1;
141 get_tree = 1;
142 get_history = 1;
Junio C Hamanoe78d9772005-05-06 08:37:21[diff] [blame]143 } else if (argv[arg][1] == 'v') {
144 get_verbosely = 1;
Daniel Barkalowc7c4bbe2005-06-06 20:43:27[diff] [blame]145 } else if (argv[arg][1] == 'w') {
146 write_ref = argv[arg + 1];
147 arg++;
Daniel Barkalow820eca62005-09-27 01:38:08[diff] [blame]148 } else if (!strcmp(argv[arg], "--recover")) {
149 get_recover = 1;
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]150 }
151 arg++;
152 }
153 if (argc < arg + 2) {
Junio C Hamanof71a69a2005-09-15 21:56:37[diff] [blame]154 usage(ssh_fetch_usage);
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]155 return 1;
156 }
157 commit_id = argv[arg];
158 url = argv[arg + 1];
159
Linus Torvalds001d4a22005-06-07 21:23:46[diff] [blame]160 if (setup_connection(&fd_in, &fd_out, prog, url, arg, argv + 1))
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]161 return 1;
162
Daniel Barkalowdba385b2005-06-03 21:43:52[diff] [blame]163 if (get_version())
164 return 1;
165
Daniel Barkalow4250a5e2005-04-30 23:53:56[diff] [blame]166 if (pull(commit_id))
Daniel Barkalow6eb7ed52005-04-24 01:47:23[diff] [blame]167 return 1;
168
169 return 0;
170}