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Commit | Line | Data |
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215a7ad1 | 1 | #include "fetch.h" |
4250a5e5 DB |
2 | |
3 | #include "cache.h" | |
4 | #include "commit.h" | |
5 | #include "tree.h" | |
3173bd49 DB |
6 | #include "tag.h" |
7 | #include "blob.h" | |
cd541a68 DB |
8 | #include "refs.h" |
9 | ||
10 | const char *write_ref = NULL; | |
11 | ||
12 | const unsigned char *current_ref = NULL; | |
4250a5e5 DB |
13 | |
14 | int get_tree = 0; | |
15 | int get_history = 0; | |
16 | int get_all = 0; | |
e78d9772 | 17 | int get_verbosely = 0; |
b2d62f16 | 18 | static unsigned char current_commit_sha1[20]; |
4250a5e5 | 19 | |
1e8be59d DB |
20 | void pull_say(const char *fmt, const char *hex) |
21 | { | |
e78d9772 JH |
22 | if (get_verbosely) |
23 | fprintf(stderr, fmt, hex); | |
24 | } | |
25 | ||
b2d62f16 JH |
26 | static void report_missing(const char *what, const unsigned char *missing) |
27 | { | |
28 | char missing_hex[41]; | |
29 | ||
30 | strcpy(missing_hex, sha1_to_hex(missing));; | |
31 | fprintf(stderr, | |
32 | "Cannot obtain needed %s %s\nwhile processing commit %s.\n", | |
33 | what, missing_hex, sha1_to_hex(current_commit_sha1)); | |
34 | } | |
35 | ||
36 | static int make_sure_we_have_it(const char *what, unsigned char *sha1) | |
ee4f439f | 37 | { |
a48e1d67 JH |
38 | int status = 0; |
39 | ||
40 | if (!has_sha1_file(sha1)) { | |
41 | status = fetch(sha1); | |
42 | if (status && what) | |
43 | report_missing(what, sha1); | |
44 | } | |
b2d62f16 | 45 | return status; |
ee4f439f JH |
46 | } |
47 | ||
1e8be59d | 48 | static int process(unsigned char *sha1, const char *type); |
3173bd49 | 49 | |
1e8be59d | 50 | static int process_tree(struct tree *tree) |
4250a5e5 | 51 | { |
4250a5e5 DB |
52 | struct tree_entry_list *entries; |
53 | ||
54 | if (parse_tree(tree)) | |
55 | return -1; | |
56 | ||
57 | for (entries = tree->entries; entries; entries = entries->next) { | |
1e8be59d DB |
58 | if (process(entries->item.any->sha1, |
59 | entries->directory ? tree_type : blob_type)) | |
4250a5e5 | 60 | return -1; |
4250a5e5 DB |
61 | } |
62 | return 0; | |
63 | } | |
64 | ||
1e8be59d | 65 | static int process_commit(struct commit *commit) |
4250a5e5 | 66 | { |
1e8be59d | 67 | if (parse_commit(commit)) |
4250a5e5 DB |
68 | return -1; |
69 | ||
1e8be59d | 70 | memcpy(current_commit_sha1, commit->object.sha1, 20); |
4250a5e5 DB |
71 | |
72 | if (get_tree) { | |
1e8be59d | 73 | if (process(commit->tree->object.sha1, tree_type)) |
4250a5e5 DB |
74 | return -1; |
75 | if (!get_all) | |
76 | get_tree = 0; | |
77 | } | |
78 | if (get_history) { | |
1e8be59d | 79 | struct commit_list *parents = commit->parents; |
4250a5e5 DB |
80 | for (; parents; parents = parents->next) { |
81 | if (has_sha1_file(parents->item->object.sha1)) | |
82 | continue; | |
1e8be59d DB |
83 | if (process(parents->item->object.sha1, |
84 | commit_type)) | |
4250a5e5 DB |
85 | return -1; |
86 | } | |
87 | } | |
88 | return 0; | |
89 | } | |
90 | ||
1e8be59d | 91 | static int process_tag(struct tag *tag) |
3173bd49 | 92 | { |
1e8be59d | 93 | if (parse_tag(tag)) |
3173bd49 | 94 | return -1; |
1e8be59d | 95 | return process(tag->tagged->sha1, NULL); |
3173bd49 DB |
96 | } |
97 | ||
1e8be59d DB |
98 | static struct object_list *process_queue = NULL; |
99 | static struct object_list **process_queue_end = &process_queue; | |
100 | ||
f88fcf8b | 101 | static int process_object(struct object *obj) |
3173bd49 | 102 | { |
f88fcf8b DB |
103 | if (obj->type == commit_type) { |
104 | if (process_commit((struct commit *)obj)) | |
105 | return -1; | |
106 | return 0; | |
107 | } | |
108 | if (obj->type == tree_type) { | |
109 | if (process_tree((struct tree *)obj)) | |
110 | return -1; | |
111 | return 0; | |
112 | } | |
113 | if (obj->type == blob_type) { | |
114 | return 0; | |
115 | } | |
116 | if (obj->type == tag_type) { | |
117 | if (process_tag((struct tag *)obj)) | |
118 | return -1; | |
3173bd49 | 119 | return 0; |
f88fcf8b DB |
120 | } |
121 | return error("Unable to determine requirements " | |
122 | "of type %s for %s", | |
123 | obj->type, sha1_to_hex(obj->sha1)); | |
124 | } | |
125 | ||
126 | static int process(unsigned char *sha1, const char *type) | |
127 | { | |
128 | struct object *obj = lookup_object_type(sha1, type); | |
129 | if (has_sha1_file(sha1)) { | |
0d62fb56 | 130 | parse_object(sha1); |
f88fcf8b DB |
131 | /* We already have it, so we should scan it now. */ |
132 | return process_object(obj); | |
133 | } | |
1e8be59d DB |
134 | if (object_list_contains(process_queue, obj)) |
135 | return 0; | |
136 | object_list_insert(obj, process_queue_end); | |
137 | process_queue_end = &(*process_queue_end)->next; | |
138 | ||
139 | //fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1)); | |
140 | prefetch(sha1); | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | static int loop(void) | |
146 | { | |
147 | while (process_queue) { | |
148 | struct object *obj = process_queue->item; | |
149 | /* | |
150 | fprintf(stderr, "%d objects to pull\n", | |
151 | object_list_length(process_queue)); | |
152 | */ | |
153 | process_queue = process_queue->next; | |
154 | if (!process_queue) | |
155 | process_queue_end = &process_queue; | |
156 | ||
157 | //fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1)); | |
158 | ||
c7c81b3a | 159 | if (make_sure_we_have_it(obj->type ? obj->type : "object", |
1e8be59d DB |
160 | obj->sha1)) |
161 | return -1; | |
162 | if (!obj->type) | |
163 | parse_object(obj->sha1); | |
f88fcf8b DB |
164 | if (process_object(obj)) |
165 | return -1; | |
1e8be59d DB |
166 | } |
167 | return 0; | |
3173bd49 DB |
168 | } |
169 | ||
cd541a68 DB |
170 | static int interpret_target(char *target, unsigned char *sha1) |
171 | { | |
172 | if (!get_sha1_hex(target, sha1)) | |
173 | return 0; | |
174 | if (!check_ref_format(target)) { | |
175 | if (!fetch_ref(target, sha1)) { | |
176 | return 0; | |
177 | } | |
178 | } | |
179 | return -1; | |
180 | } | |
181 | ||
182 | ||
4250a5e5 DB |
183 | int pull(char *target) |
184 | { | |
4250a5e5 | 185 | unsigned char sha1[20]; |
cd541a68 DB |
186 | int fd = -1; |
187 | ||
188 | if (write_ref && current_ref) { | |
189 | fd = lock_ref_sha1(write_ref, current_ref); | |
190 | if (fd < 0) | |
191 | return -1; | |
192 | } | |
193 | ||
194 | if (interpret_target(target, sha1)) | |
195 | return error("Could not interpret %s as something to pull", | |
196 | target); | |
1e8be59d DB |
197 | if (process(sha1, NULL)) |
198 | return -1; | |
199 | if (loop()) | |
cd541a68 DB |
200 | return -1; |
201 | ||
202 | if (write_ref) { | |
203 | if (current_ref) { | |
204 | write_ref_sha1(write_ref, fd, sha1); | |
205 | } else { | |
206 | write_ref_sha1_unlocked(write_ref, sha1); | |
207 | } | |
208 | } | |
209 | return 0; | |
4250a5e5 | 210 | } |