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Commit | Line | Data |
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def88e9a LT |
1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "pkt-line.h" | |
f6b42a81 JH |
4 | #include "tag.h" |
5 | #include "object.h" | |
794f9fe7 | 6 | #include "commit.h" |
def88e9a | 7 | |
960deccb | 8 | static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>"; |
def88e9a | 9 | |
794f9fe7 | 10 | #define THEY_HAVE (1U << 0) |
6b32884a JH |
11 | #define MAX_HAS 256 |
12 | #define MAX_NEEDS 256 | |
0f8fdc39 | 13 | static int nr_has = 0, nr_needs = 0, multi_ack = 0; |
fb9040cc LT |
14 | static unsigned char has_sha1[MAX_HAS][20]; |
15 | static unsigned char needs_sha1[MAX_NEEDS][20]; | |
960deccb PA |
16 | static unsigned int timeout = 0; |
17 | ||
18 | static void reset_timeout(void) | |
19 | { | |
20 | alarm(timeout); | |
21 | } | |
fb9040cc | 22 | |
75bfc6c2 LT |
23 | static int strip(char *line, int len) |
24 | { | |
25 | if (len && line[len-1] == '\n') | |
26 | line[--len] = 0; | |
27 | return len; | |
28 | } | |
29 | ||
fb9040cc LT |
30 | static void create_pack_file(void) |
31 | { | |
75bfc6c2 LT |
32 | int fd[2]; |
33 | pid_t pid; | |
34 | ||
35 | if (pipe(fd) < 0) | |
36 | die("git-upload-pack: unable to create pipe"); | |
37 | pid = fork(); | |
38 | if (pid < 0) | |
39 | die("git-upload-pack: unable to fork git-rev-list"); | |
40 | ||
41 | if (!pid) { | |
42 | int i; | |
e091eb93 JH |
43 | int args; |
44 | char **argv; | |
45 | char *buf; | |
46 | char **p; | |
47 | ||
48 | if (MAX_NEEDS <= nr_needs) | |
49 | args = nr_has + 10; | |
50 | else | |
51 | args = nr_has + nr_needs + 5; | |
52 | argv = xmalloc(args * sizeof(char *)); | |
53 | buf = xmalloc(args * 45); | |
54 | p = argv; | |
75bfc6c2 LT |
55 | |
56 | dup2(fd[1], 1); | |
57 | close(0); | |
58 | close(fd[0]); | |
59 | close(fd[1]); | |
60 | *p++ = "git-rev-list"; | |
61 | *p++ = "--objects"; | |
e091eb93 JH |
62 | if (MAX_NEEDS <= nr_needs) |
63 | *p++ = "--all"; | |
64 | else { | |
65 | for (i = 0; i < nr_needs; i++) { | |
66 | *p++ = buf; | |
67 | memcpy(buf, sha1_to_hex(needs_sha1[i]), 41); | |
68 | buf += 41; | |
69 | } | |
75bfc6c2 LT |
70 | } |
71 | for (i = 0; i < nr_has; i++) { | |
72 | *p++ = buf; | |
73 | *buf++ = '^'; | |
74 | memcpy(buf, sha1_to_hex(has_sha1[i]), 41); | |
75 | buf += 41; | |
76 | } | |
77 | *p++ = NULL; | |
78 | execvp("git-rev-list", argv); | |
79 | die("git-upload-pack: unable to exec git-rev-list"); | |
80 | } | |
81 | dup2(fd[0], 0); | |
82 | close(fd[0]); | |
83 | close(fd[1]); | |
84 | execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL); | |
85 | die("git-upload-pack: unable to exec git-pack-objects"); | |
fb9040cc LT |
86 | } |
87 | ||
def88e9a LT |
88 | static int got_sha1(char *hex, unsigned char *sha1) |
89 | { | |
90 | if (get_sha1_hex(hex, sha1)) | |
91 | die("git-upload-pack: expected SHA1 object, got '%s'", hex); | |
fb9040cc LT |
92 | if (!has_sha1_file(sha1)) |
93 | return 0; | |
794f9fe7 JS |
94 | if (nr_has < MAX_HAS) { |
95 | struct object *o = lookup_object(sha1); | |
7efc8e43 JH |
96 | if (!(o && o->parsed)) |
97 | o = parse_object(sha1); | |
98 | if (!o) | |
794f9fe7 JS |
99 | die("oops (%s)", sha1_to_hex(sha1)); |
100 | if (o->type == commit_type) { | |
101 | struct commit_list *parents; | |
102 | if (o->flags & THEY_HAVE) | |
103 | return 0; | |
104 | o->flags |= THEY_HAVE; | |
105 | for (parents = ((struct commit*)o)->parents; | |
106 | parents; | |
107 | parents = parents->next) | |
108 | parents->item->object.flags |= THEY_HAVE; | |
109 | } | |
110 | memcpy(has_sha1[nr_has++], sha1, 20); | |
fb9040cc LT |
111 | } |
112 | return 1; | |
def88e9a LT |
113 | } |
114 | ||
115 | static int get_common_commits(void) | |
116 | { | |
117 | static char line[1000]; | |
118 | unsigned char sha1[20]; | |
119 | int len; | |
120 | ||
794f9fe7 JS |
121 | track_object_refs = 0; |
122 | save_commit_buffer = 0; | |
123 | ||
def88e9a LT |
124 | for(;;) { |
125 | len = packet_read_line(0, line, sizeof(line)); | |
960deccb | 126 | reset_timeout(); |
def88e9a LT |
127 | |
128 | if (!len) { | |
0f8fdc39 JS |
129 | if (multi_ack || nr_has == 0) |
130 | packet_write(1, "NAK\n"); | |
def88e9a LT |
131 | continue; |
132 | } | |
75bfc6c2 | 133 | len = strip(line, len); |
def88e9a | 134 | if (!strncmp(line, "have ", 5)) { |
0f8fdc39 JS |
135 | if (got_sha1(line+5, sha1) && |
136 | (multi_ack || nr_has == 1)) | |
137 | packet_write(1, "ACK %s%s\n", | |
138 | sha1_to_hex(sha1), | |
139 | multi_ack && nr_has < MAX_HAS ? | |
140 | " continue" : ""); | |
def88e9a LT |
141 | continue; |
142 | } | |
143 | if (!strcmp(line, "done")) { | |
0f8fdc39 JS |
144 | if (nr_has > 0) |
145 | return 0; | |
def88e9a LT |
146 | packet_write(1, "NAK\n"); |
147 | return -1; | |
148 | } | |
149 | die("git-upload-pack: expected SHA1 list, got '%s'", line); | |
150 | } | |
def88e9a LT |
151 | } |
152 | ||
fb9040cc LT |
153 | static int receive_needs(void) |
154 | { | |
155 | static char line[1000]; | |
156 | int len, needs; | |
157 | ||
158 | needs = 0; | |
159 | for (;;) { | |
e091eb93 | 160 | unsigned char dummy[20], *sha1_buf; |
fb9040cc | 161 | len = packet_read_line(0, line, sizeof(line)); |
960deccb | 162 | reset_timeout(); |
fb9040cc LT |
163 | if (!len) |
164 | return needs; | |
165 | ||
e091eb93 JH |
166 | sha1_buf = dummy; |
167 | if (needs == MAX_NEEDS) { | |
168 | fprintf(stderr, | |
169 | "warning: supporting only a max of %d requests. " | |
170 | "sending everything instead.\n", | |
171 | MAX_NEEDS); | |
172 | } | |
173 | else if (needs < MAX_NEEDS) | |
174 | sha1_buf = needs_sha1[needs]; | |
175 | ||
176 | if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf)) | |
177 | die("git-upload-pack: protocol error, " | |
178 | "expected to get sha, not '%s'", line); | |
0f8fdc39 JS |
179 | |
180 | if (strstr(line+45, "multi_ack")) | |
181 | multi_ack = 1; | |
182 | ||
fb9040cc LT |
183 | needs++; |
184 | } | |
185 | } | |
186 | ||
def88e9a LT |
187 | static int send_ref(const char *refname, const unsigned char *sha1) |
188 | { | |
f6b42a81 JH |
189 | struct object *o = parse_object(sha1); |
190 | ||
def88e9a | 191 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname); |
f6b42a81 JH |
192 | if (o->type == tag_type) { |
193 | o = deref_tag(o); | |
194 | packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname); | |
195 | } | |
def88e9a LT |
196 | return 0; |
197 | } | |
198 | ||
199 | static int upload_pack(void) | |
200 | { | |
960deccb | 201 | reset_timeout(); |
723c31fe | 202 | head_ref(send_ref); |
def88e9a LT |
203 | for_each_ref(send_ref); |
204 | packet_flush(1); | |
fb9040cc LT |
205 | nr_needs = receive_needs(); |
206 | if (!nr_needs) | |
207 | return 0; | |
def88e9a | 208 | get_common_commits(); |
fb9040cc | 209 | create_pack_file(); |
def88e9a LT |
210 | return 0; |
211 | } | |
212 | ||
213 | int main(int argc, char **argv) | |
214 | { | |
215 | const char *dir; | |
960deccb PA |
216 | int i; |
217 | int strict = 0; | |
218 | ||
219 | for (i = 1; i < argc; i++) { | |
220 | char *arg = argv[i]; | |
221 | ||
222 | if (arg[0] != '-') | |
223 | break; | |
224 | if (!strcmp(arg, "--strict")) { | |
225 | strict = 1; | |
226 | continue; | |
227 | } | |
228 | if (!strncmp(arg, "--timeout=", 10)) { | |
229 | timeout = atoi(arg+10); | |
230 | continue; | |
231 | } | |
232 | if (!strcmp(arg, "--")) { | |
233 | i++; | |
234 | break; | |
235 | } | |
236 | } | |
237 | ||
238 | if (i != argc-1) | |
def88e9a | 239 | usage(upload_pack_usage); |
960deccb | 240 | dir = argv[i]; |
113b9475 LT |
241 | |
242 | /* chdir to the directory. If that fails, try appending ".git" */ | |
243 | if (chdir(dir) < 0) { | |
960deccb | 244 | if (strict || chdir(mkpath("%s.git", dir)) < 0) |
113b9475 LT |
245 | die("git-upload-pack unable to chdir to %s", dir); |
246 | } | |
960deccb PA |
247 | if (!strict) |
248 | chdir(".git"); | |
249 | ||
def88e9a LT |
250 | if (access("objects", X_OK) || access("refs", X_OK)) |
251 | die("git-upload-pack: %s doesn't seem to be a git archive", dir); | |
960deccb | 252 | |
e72a7d45 | 253 | putenv("GIT_DIR=."); |
def88e9a LT |
254 | upload_pack(); |
255 | return 0; | |
256 | } |