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Commit | Line | Data |
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1fcc8ea5 LT |
1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "pkt-line.h" | |
1fcc8ea5 | 4 | |
64c381bf | 5 | static const char clone_pack_usage[] = |
e1c7ada6 | 6 | "git-clone-pack [--exec=<git-upload-pack>] [<host>:]<directory> [<heads>]*"; |
1fcc8ea5 LT |
7 | static const char *exec = "git-upload-pack"; |
8 | ||
1fcc8ea5 LT |
9 | static void clone_handshake(int fd[2], struct ref *ref) |
10 | { | |
11 | unsigned char sha1[20]; | |
12 | ||
13 | while (ref) { | |
d1c133f5 | 14 | packet_write(fd[1], "want %s\n", sha1_to_hex(ref->old_sha1)); |
1fcc8ea5 LT |
15 | ref = ref->next; |
16 | } | |
17 | packet_flush(fd[1]); | |
18 | ||
19 | /* We don't have nuttin' */ | |
20 | packet_write(fd[1], "done\n"); | |
21 | if (get_ack(fd[0], sha1)) | |
22 | error("Huh! git-clone-pack got positive ack for %s", sha1_to_hex(sha1)); | |
23 | } | |
24 | ||
25 | static int is_master(struct ref *ref) | |
26 | { | |
27 | return !strcmp(ref->name, "refs/heads/master"); | |
28 | } | |
29 | ||
30 | static void write_one_ref(struct ref *ref) | |
31 | { | |
4ec99bf0 | 32 | char *path = git_path("%s", ref->name); |
b2cb9425 | 33 | int fd; |
1fcc8ea5 LT |
34 | char *hex; |
35 | ||
d8a1deec JH |
36 | if (!strncmp(ref->name, "refs/", 5) && |
37 | check_ref_format(ref->name + 5)) { | |
38 | error("refusing to create funny ref '%s' locally", ref->name); | |
39 | return; | |
40 | } | |
41 | ||
b2cb9425 JH |
42 | if (safe_create_leading_directories(path)) |
43 | die("unable to create leading directory for %s", ref->name); | |
44 | fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0666); | |
1fcc8ea5 LT |
45 | if (fd < 0) |
46 | die("unable to create ref %s", ref->name); | |
d1c133f5 | 47 | hex = sha1_to_hex(ref->old_sha1); |
1fcc8ea5 LT |
48 | hex[40] = '\n'; |
49 | if (write(fd, hex, 41) != 41) | |
50 | die("unable to write ref %s", ref->name); | |
51 | close(fd); | |
52 | } | |
53 | ||
54 | static void write_refs(struct ref *ref) | |
55 | { | |
56 | struct ref *head = NULL, *head_ptr, *master_ref; | |
57 | char *head_path; | |
58 | ||
4cfc63db | 59 | /* Upload-pack must report HEAD first */ |
1fcc8ea5 LT |
60 | if (!strcmp(ref->name, "HEAD")) { |
61 | head = ref; | |
62 | ref = ref->next; | |
63 | } | |
64 | head_ptr = NULL; | |
65 | master_ref = NULL; | |
66 | while (ref) { | |
67 | if (is_master(ref)) | |
68 | master_ref = ref; | |
4cfc63db JH |
69 | if (head && |
70 | !memcmp(ref->old_sha1, head->old_sha1, 20) && | |
71 | !strncmp(ref->name, "refs/heads/",11) && | |
72 | (!head_ptr || ref == master_ref)) | |
73 | head_ptr = ref; | |
74 | ||
1fcc8ea5 LT |
75 | write_one_ref(ref); |
76 | ref = ref->next; | |
77 | } | |
4cfc63db JH |
78 | if (!head) { |
79 | fprintf(stderr, "No HEAD in remote.\n"); | |
1fcc8ea5 | 80 | return; |
4cfc63db | 81 | } |
1fcc8ea5 | 82 | |
4cfc63db | 83 | head_path = strdup(git_path("HEAD")); |
1fcc8ea5 LT |
84 | if (!head_ptr) { |
85 | /* | |
86 | * If we had a master ref, and it wasn't HEAD, we need to undo the | |
87 | * symlink, and write a standalone HEAD. Give a warning, because that's | |
88 | * really really wrong. | |
89 | */ | |
90 | if (master_ref) { | |
91 | error("HEAD doesn't point to any refs! Making standalone HEAD"); | |
92 | unlink(head_path); | |
93 | } | |
94 | write_one_ref(head); | |
4cfc63db | 95 | free(head_path); |
1fcc8ea5 LT |
96 | return; |
97 | } | |
98 | ||
99 | /* We reset to the master branch if it's available */ | |
100 | if (master_ref) | |
101 | return; | |
102 | ||
4cfc63db JH |
103 | fprintf(stderr, "Setting HEAD to %s\n", head_ptr->name); |
104 | ||
1fcc8ea5 LT |
105 | /* |
106 | * Uhhuh. Other end didn't have master. We start HEAD off with | |
107 | * the first branch with the same value. | |
108 | */ | |
4cfc63db | 109 | if (create_symref(head_path, head_ptr->name) < 0) |
1fcc8ea5 | 110 | die("unable to link HEAD to %s", head_ptr->name); |
4cfc63db | 111 | free(head_path); |
1fcc8ea5 LT |
112 | } |
113 | ||
11dcec07 JH |
114 | static int clone_pack(int fd[2], int nr_match, char **match) |
115 | { | |
116 | struct ref *refs; | |
117 | int status; | |
118 | ||
1a7141ff | 119 | get_remote_heads(fd[0], &refs, nr_match, match, 1); |
11dcec07 JH |
120 | if (!refs) { |
121 | packet_flush(fd[1]); | |
122 | die("no matching remote head"); | |
123 | } | |
124 | clone_handshake(fd, refs); | |
125 | ||
ad897215 | 126 | status = receive_keep_pack(fd, "git-clone-pack"); |
11dcec07 | 127 | |
31ec6abf JH |
128 | if (!status) { |
129 | if (nr_match == 0) | |
130 | write_refs(refs); | |
131 | else | |
132 | while (refs) { | |
133 | printf("%s %s\n", | |
134 | sha1_to_hex(refs->old_sha1), | |
135 | refs->name); | |
136 | refs = refs->next; | |
137 | } | |
138 | } | |
11dcec07 JH |
139 | return status; |
140 | } | |
141 | ||
1fcc8ea5 LT |
142 | int main(int argc, char **argv) |
143 | { | |
144 | int i, ret, nr_heads; | |
145 | char *dest = NULL, **heads; | |
146 | int fd[2]; | |
147 | pid_t pid; | |
148 | ||
5a327713 JH |
149 | setup_git_directory(); |
150 | ||
1fcc8ea5 LT |
151 | nr_heads = 0; |
152 | heads = NULL; | |
153 | for (i = 1; i < argc; i++) { | |
154 | char *arg = argv[i]; | |
155 | ||
156 | if (*arg == '-') { | |
e1c7ada6 | 157 | if (!strcmp("-q", arg)) |
167a4a33 | 158 | continue; |
6ec311da JH |
159 | if (!strncmp("--exec=", arg, 7)) { |
160 | exec = arg + 7; | |
161 | continue; | |
162 | } | |
1fcc8ea5 LT |
163 | usage(clone_pack_usage); |
164 | } | |
165 | dest = arg; | |
166 | heads = argv + i + 1; | |
167 | nr_heads = argc - i - 1; | |
168 | break; | |
169 | } | |
170 | if (!dest) | |
171 | usage(clone_pack_usage); | |
172 | pid = git_connect(fd, dest, exec); | |
173 | if (pid < 0) | |
174 | return 1; | |
175 | ret = clone_pack(fd, nr_heads, heads); | |
176 | close(fd[0]); | |
177 | close(fd[1]); | |
178 | finish_connect(pid); | |
179 | return ret; | |
180 | } |