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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 | ||
1e8be59d | 36 | static int process(unsigned char *sha1, const char *type); |
3173bd49 | 37 | |
1e8be59d | 38 | static int process_tree(struct tree *tree) |
4250a5e5 | 39 | { |
85d106c2 | 40 | struct tree_entry_list *entry; |
4250a5e5 DB |
41 | |
42 | if (parse_tree(tree)) | |
43 | return -1; | |
44 | ||
85d106c2 JH |
45 | entry = tree->entries; |
46 | tree->entries = NULL; | |
47 | while (entry) { | |
48 | struct tree_entry_list *next = entry->next; | |
49 | if (process(entry->item.any->sha1, | |
50 | entry->directory ? tree_type : blob_type)) | |
4250a5e5 | 51 | return -1; |
85d106c2 JH |
52 | free(entry); |
53 | entry = next; | |
4250a5e5 DB |
54 | } |
55 | return 0; | |
56 | } | |
57 | ||
d0ac30f2 | 58 | #define COMPLETE 1U |
85d106c2 JH |
59 | #define TO_FETCH 2U |
60 | #define TO_SCAN 4U | |
61 | #define SCANNED 8U | |
62 | ||
d0ac30f2 | 63 | static struct commit_list *complete = NULL; |
22c6e1d0 | 64 | |
1e8be59d | 65 | static int process_commit(struct commit *commit) |
4250a5e5 | 66 | { |
1e8be59d | 67 | if (parse_commit(commit)) |
4250a5e5 DB |
68 | return -1; |
69 | ||
22c6e1d0 | 70 | while (complete && complete->item->date >= commit->date) { |
d0ac30f2 | 71 | pop_most_recent_commit(&complete, COMPLETE); |
22c6e1d0 | 72 | } |
22c6e1d0 | 73 | |
d0ac30f2 | 74 | if (commit->object.flags & COMPLETE) |
22c6e1d0 DB |
75 | return 0; |
76 | ||
1e8be59d | 77 | memcpy(current_commit_sha1, commit->object.sha1, 20); |
4250a5e5 | 78 | |
85d106c2 JH |
79 | pull_say("walk %s\n", sha1_to_hex(commit->object.sha1)); |
80 | ||
4250a5e5 | 81 | if (get_tree) { |
1e8be59d | 82 | if (process(commit->tree->object.sha1, tree_type)) |
4250a5e5 DB |
83 | return -1; |
84 | if (!get_all) | |
85 | get_tree = 0; | |
86 | } | |
87 | if (get_history) { | |
1e8be59d | 88 | struct commit_list *parents = commit->parents; |
4250a5e5 | 89 | for (; parents; parents = parents->next) { |
85d106c2 | 90 | if (process(parents->item->object.sha1, commit_type)) |
4250a5e5 DB |
91 | return -1; |
92 | } | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | ||
1e8be59d | 97 | static int process_tag(struct tag *tag) |
3173bd49 | 98 | { |
1e8be59d | 99 | if (parse_tag(tag)) |
3173bd49 | 100 | return -1; |
1e8be59d | 101 | return process(tag->tagged->sha1, NULL); |
3173bd49 DB |
102 | } |
103 | ||
1e8be59d DB |
104 | static struct object_list *process_queue = NULL; |
105 | static struct object_list **process_queue_end = &process_queue; | |
106 | ||
f88fcf8b | 107 | static int process_object(struct object *obj) |
3173bd49 | 108 | { |
85d106c2 JH |
109 | if (obj->flags & SCANNED) |
110 | return 0; | |
111 | obj->flags |= SCANNED; | |
112 | ||
f88fcf8b DB |
113 | if (obj->type == commit_type) { |
114 | if (process_commit((struct commit *)obj)) | |
115 | return -1; | |
116 | return 0; | |
117 | } | |
118 | if (obj->type == tree_type) { | |
119 | if (process_tree((struct tree *)obj)) | |
120 | return -1; | |
121 | return 0; | |
122 | } | |
123 | if (obj->type == blob_type) { | |
124 | return 0; | |
125 | } | |
126 | if (obj->type == tag_type) { | |
127 | if (process_tag((struct tag *)obj)) | |
128 | return -1; | |
3173bd49 | 129 | return 0; |
f88fcf8b DB |
130 | } |
131 | return error("Unable to determine requirements " | |
132 | "of type %s for %s", | |
133 | obj->type, sha1_to_hex(obj->sha1)); | |
134 | } | |
135 | ||
136 | static int process(unsigned char *sha1, const char *type) | |
137 | { | |
138 | struct object *obj = lookup_object_type(sha1, type); | |
22c6e1d0 | 139 | |
f88fcf8b | 140 | if (has_sha1_file(sha1)) { |
0d62fb56 | 141 | parse_object(sha1); |
f88fcf8b | 142 | /* We already have it, so we should scan it now. */ |
85d106c2 JH |
143 | if (obj->flags & (SCANNED | TO_SCAN)) |
144 | return 0; | |
145 | object_list_insert(obj, process_queue_end); | |
146 | process_queue_end = &(*process_queue_end)->next; | |
147 | obj->flags |= TO_SCAN; | |
148 | return 0; | |
f88fcf8b | 149 | } |
85d106c2 | 150 | if (obj->flags & (COMPLETE | TO_FETCH)) |
1e8be59d DB |
151 | return 0; |
152 | object_list_insert(obj, process_queue_end); | |
153 | process_queue_end = &(*process_queue_end)->next; | |
85d106c2 | 154 | obj->flags |= TO_FETCH; |
1e8be59d | 155 | |
1e8be59d DB |
156 | prefetch(sha1); |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int loop(void) | |
162 | { | |
85d106c2 JH |
163 | struct object_list *elem; |
164 | ||
1e8be59d DB |
165 | while (process_queue) { |
166 | struct object *obj = process_queue->item; | |
85d106c2 JH |
167 | elem = process_queue; |
168 | process_queue = elem->next; | |
169 | free(elem); | |
1e8be59d DB |
170 | if (!process_queue) |
171 | process_queue_end = &process_queue; | |
172 | ||
85d106c2 JH |
173 | /* If we are not scanning this object, we placed it in |
174 | * the queue because we needed to fetch it first. | |
175 | */ | |
176 | if (! (obj->flags & TO_SCAN)) { | |
029f6de3 | 177 | if (!has_sha1_file(obj->sha1) && fetch(obj->sha1)) { |
85d106c2 JH |
178 | report_missing(obj->type |
179 | ? obj->type | |
180 | : "object", obj->sha1); | |
181 | return -1; | |
182 | } | |
183 | } | |
1e8be59d DB |
184 | if (!obj->type) |
185 | parse_object(obj->sha1); | |
f88fcf8b DB |
186 | if (process_object(obj)) |
187 | return -1; | |
1e8be59d DB |
188 | } |
189 | return 0; | |
3173bd49 DB |
190 | } |
191 | ||
cd541a68 DB |
192 | static int interpret_target(char *target, unsigned char *sha1) |
193 | { | |
194 | if (!get_sha1_hex(target, sha1)) | |
195 | return 0; | |
196 | if (!check_ref_format(target)) { | |
197 | if (!fetch_ref(target, sha1)) { | |
198 | return 0; | |
199 | } | |
200 | } | |
201 | return -1; | |
202 | } | |
203 | ||
22c6e1d0 DB |
204 | static int mark_complete(const char *path, const unsigned char *sha1) |
205 | { | |
d0ac30f2 JH |
206 | struct commit *commit = lookup_commit_reference_gently(sha1, 1); |
207 | if (commit) { | |
208 | commit->object.flags |= COMPLETE; | |
209 | insert_by_date(commit, &complete); | |
22c6e1d0 DB |
210 | } |
211 | return 0; | |
212 | } | |
cd541a68 | 213 | |
4250a5e5 DB |
214 | int pull(char *target) |
215 | { | |
4250a5e5 | 216 | unsigned char sha1[20]; |
cd541a68 DB |
217 | int fd = -1; |
218 | ||
98533b90 | 219 | save_commit_buffer = 0; |
cd541a68 DB |
220 | if (write_ref && current_ref) { |
221 | fd = lock_ref_sha1(write_ref, current_ref); | |
222 | if (fd < 0) | |
223 | return -1; | |
224 | } | |
225 | ||
22c6e1d0 DB |
226 | for_each_ref(mark_complete); |
227 | ||
cd541a68 DB |
228 | if (interpret_target(target, sha1)) |
229 | return error("Could not interpret %s as something to pull", | |
230 | target); | |
1e8be59d DB |
231 | if (process(sha1, NULL)) |
232 | return -1; | |
233 | if (loop()) | |
cd541a68 DB |
234 | return -1; |
235 | ||
236 | if (write_ref) { | |
237 | if (current_ref) { | |
238 | write_ref_sha1(write_ref, fd, sha1); | |
239 | } else { | |
240 | write_ref_sha1_unlocked(write_ref, sha1); | |
241 | } | |
242 | } | |
243 | return 0; | |
4250a5e5 | 244 | } |