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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" | |
def88e9a | 6 | |
960deccb | 7 | static const char upload_pack_usage[] = "git-upload-pack [--strict] [--timeout=nn] <dir>"; |
def88e9a | 8 | |
fb9040cc | 9 | #define MAX_HAS (16) |
319aae27 | 10 | #define MAX_NEEDS (256) |
fb9040cc LT |
11 | static int nr_has = 0, nr_needs = 0; |
12 | static unsigned char has_sha1[MAX_HAS][20]; | |
13 | static unsigned char needs_sha1[MAX_NEEDS][20]; | |
960deccb PA |
14 | static unsigned int timeout = 0; |
15 | ||
16 | static void reset_timeout(void) | |
17 | { | |
18 | alarm(timeout); | |
19 | } | |
fb9040cc | 20 | |
75bfc6c2 LT |
21 | static int strip(char *line, int len) |
22 | { | |
23 | if (len && line[len-1] == '\n') | |
24 | line[--len] = 0; | |
25 | return len; | |
26 | } | |
27 | ||
fb9040cc LT |
28 | static void create_pack_file(void) |
29 | { | |
75bfc6c2 LT |
30 | int fd[2]; |
31 | pid_t pid; | |
32 | ||
33 | if (pipe(fd) < 0) | |
34 | die("git-upload-pack: unable to create pipe"); | |
35 | pid = fork(); | |
36 | if (pid < 0) | |
37 | die("git-upload-pack: unable to fork git-rev-list"); | |
38 | ||
39 | if (!pid) { | |
40 | int i; | |
e091eb93 JH |
41 | int args; |
42 | char **argv; | |
43 | char *buf; | |
44 | char **p; | |
45 | ||
46 | if (MAX_NEEDS <= nr_needs) | |
47 | args = nr_has + 10; | |
48 | else | |
49 | args = nr_has + nr_needs + 5; | |
50 | argv = xmalloc(args * sizeof(char *)); | |
51 | buf = xmalloc(args * 45); | |
52 | p = argv; | |
75bfc6c2 LT |
53 | |
54 | dup2(fd[1], 1); | |
55 | close(0); | |
56 | close(fd[0]); | |
57 | close(fd[1]); | |
58 | *p++ = "git-rev-list"; | |
59 | *p++ = "--objects"; | |
e091eb93 JH |
60 | if (MAX_NEEDS <= nr_needs) |
61 | *p++ = "--all"; | |
62 | else { | |
63 | for (i = 0; i < nr_needs; i++) { | |
64 | *p++ = buf; | |
65 | memcpy(buf, sha1_to_hex(needs_sha1[i]), 41); | |
66 | buf += 41; | |
67 | } | |
75bfc6c2 LT |
68 | } |
69 | for (i = 0; i < nr_has; i++) { | |
70 | *p++ = buf; | |
71 | *buf++ = '^'; | |
72 | memcpy(buf, sha1_to_hex(has_sha1[i]), 41); | |
73 | buf += 41; | |
74 | } | |
75 | *p++ = NULL; | |
76 | execvp("git-rev-list", argv); | |
77 | die("git-upload-pack: unable to exec git-rev-list"); | |
78 | } | |
79 | dup2(fd[0], 0); | |
80 | close(fd[0]); | |
81 | close(fd[1]); | |
82 | execlp("git-pack-objects", "git-pack-objects", "--stdout", NULL); | |
83 | die("git-upload-pack: unable to exec git-pack-objects"); | |
fb9040cc LT |
84 | } |
85 | ||
def88e9a LT |
86 | static int got_sha1(char *hex, unsigned char *sha1) |
87 | { | |
fb9040cc | 88 | int nr; |
def88e9a LT |
89 | if (get_sha1_hex(hex, sha1)) |
90 | die("git-upload-pack: expected SHA1 object, got '%s'", hex); | |
fb9040cc LT |
91 | if (!has_sha1_file(sha1)) |
92 | return 0; | |
93 | nr = nr_has; | |
94 | if (nr < MAX_HAS) { | |
95 | memcpy(has_sha1[nr], sha1, 20); | |
96 | nr_has = nr+1; | |
97 | } | |
98 | return 1; | |
def88e9a LT |
99 | } |
100 | ||
101 | static int get_common_commits(void) | |
102 | { | |
103 | static char line[1000]; | |
104 | unsigned char sha1[20]; | |
105 | int len; | |
106 | ||
107 | for(;;) { | |
108 | len = packet_read_line(0, line, sizeof(line)); | |
960deccb | 109 | reset_timeout(); |
def88e9a LT |
110 | |
111 | if (!len) { | |
112 | packet_write(1, "NAK\n"); | |
113 | continue; | |
114 | } | |
75bfc6c2 | 115 | len = strip(line, len); |
def88e9a LT |
116 | if (!strncmp(line, "have ", 5)) { |
117 | if (got_sha1(line+5, sha1)) { | |
118 | packet_write(1, "ACK %s\n", sha1_to_hex(sha1)); | |
119 | break; | |
120 | } | |
121 | continue; | |
122 | } | |
123 | if (!strcmp(line, "done")) { | |
124 | packet_write(1, "NAK\n"); | |
125 | return -1; | |
126 | } | |
127 | die("git-upload-pack: expected SHA1 list, got '%s'", line); | |
128 | } | |
129 | ||
130 | for (;;) { | |
131 | len = packet_read_line(0, line, sizeof(line)); | |
960deccb | 132 | reset_timeout(); |
def88e9a | 133 | if (!len) |
75bfc6c2 LT |
134 | continue; |
135 | len = strip(line, len); | |
def88e9a LT |
136 | if (!strncmp(line, "have ", 5)) { |
137 | got_sha1(line+5, sha1); | |
138 | continue; | |
139 | } | |
140 | if (!strcmp(line, "done")) | |
141 | break; | |
142 | die("git-upload-pack: expected SHA1 list, got '%s'", line); | |
143 | } | |
144 | return 0; | |
145 | } | |
146 | ||
fb9040cc LT |
147 | static int receive_needs(void) |
148 | { | |
149 | static char line[1000]; | |
150 | int len, needs; | |
151 | ||
152 | needs = 0; | |
153 | for (;;) { | |
e091eb93 | 154 | unsigned char dummy[20], *sha1_buf; |
fb9040cc | 155 | len = packet_read_line(0, line, sizeof(line)); |
960deccb | 156 | reset_timeout(); |
fb9040cc LT |
157 | if (!len) |
158 | return needs; | |
159 | ||
e091eb93 JH |
160 | sha1_buf = dummy; |
161 | if (needs == MAX_NEEDS) { | |
162 | fprintf(stderr, | |
163 | "warning: supporting only a max of %d requests. " | |
164 | "sending everything instead.\n", | |
165 | MAX_NEEDS); | |
166 | } | |
167 | else if (needs < MAX_NEEDS) | |
168 | sha1_buf = needs_sha1[needs]; | |
169 | ||
170 | if (strncmp("want ", line, 5) || get_sha1_hex(line+5, sha1_buf)) | |
171 | die("git-upload-pack: protocol error, " | |
172 | "expected to get sha, not '%s'", line); | |
fb9040cc LT |
173 | needs++; |
174 | } | |
175 | } | |
176 | ||
def88e9a LT |
177 | static int send_ref(const char *refname, const unsigned char *sha1) |
178 | { | |
f6b42a81 JH |
179 | struct object *o = parse_object(sha1); |
180 | ||
def88e9a | 181 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname); |
f6b42a81 JH |
182 | if (o->type == tag_type) { |
183 | o = deref_tag(o); | |
184 | packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname); | |
185 | } | |
def88e9a LT |
186 | return 0; |
187 | } | |
188 | ||
189 | static int upload_pack(void) | |
190 | { | |
960deccb | 191 | reset_timeout(); |
723c31fe | 192 | head_ref(send_ref); |
def88e9a LT |
193 | for_each_ref(send_ref); |
194 | packet_flush(1); | |
fb9040cc LT |
195 | nr_needs = receive_needs(); |
196 | if (!nr_needs) | |
197 | return 0; | |
def88e9a | 198 | get_common_commits(); |
fb9040cc | 199 | create_pack_file(); |
def88e9a LT |
200 | return 0; |
201 | } | |
202 | ||
203 | int main(int argc, char **argv) | |
204 | { | |
205 | const char *dir; | |
960deccb PA |
206 | int i; |
207 | int strict = 0; | |
208 | ||
209 | for (i = 1; i < argc; i++) { | |
210 | char *arg = argv[i]; | |
211 | ||
212 | if (arg[0] != '-') | |
213 | break; | |
214 | if (!strcmp(arg, "--strict")) { | |
215 | strict = 1; | |
216 | continue; | |
217 | } | |
218 | if (!strncmp(arg, "--timeout=", 10)) { | |
219 | timeout = atoi(arg+10); | |
220 | continue; | |
221 | } | |
222 | if (!strcmp(arg, "--")) { | |
223 | i++; | |
224 | break; | |
225 | } | |
226 | } | |
227 | ||
228 | if (i != argc-1) | |
def88e9a | 229 | usage(upload_pack_usage); |
960deccb | 230 | dir = argv[i]; |
113b9475 LT |
231 | |
232 | /* chdir to the directory. If that fails, try appending ".git" */ | |
233 | if (chdir(dir) < 0) { | |
960deccb | 234 | if (strict || chdir(mkpath("%s.git", dir)) < 0) |
113b9475 LT |
235 | die("git-upload-pack unable to chdir to %s", dir); |
236 | } | |
960deccb PA |
237 | if (!strict) |
238 | chdir(".git"); | |
239 | ||
def88e9a LT |
240 | if (access("objects", X_OK) || access("refs", X_OK)) |
241 | die("git-upload-pack: %s doesn't seem to be a git archive", dir); | |
960deccb | 242 | |
e72a7d45 | 243 | putenv("GIT_DIR=."); |
def88e9a LT |
244 | upload_pack(); |
245 | return 0; | |
246 | } |