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Commit | Line | Data |
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4250a5e5 | 1 | #include "cache.h" |
30ae764b | 2 | #include "walker.h" |
4250a5e5 DB |
3 | #include "commit.h" |
4 | #include "tree.h" | |
1bc995a3 | 5 | #include "tree-walk.h" |
3173bd49 DB |
6 | #include "tag.h" |
7 | #include "blob.h" | |
cd541a68 DB |
8 | #include "refs.h" |
9 | ||
b2d62f16 | 10 | static unsigned char current_commit_sha1[20]; |
4250a5e5 | 11 | |
30ae764b | 12 | void walker_say(struct walker *walker, const char *fmt, const char *hex) |
1e8be59d | 13 | { |
30ae764b | 14 | if (walker->get_verbosely) |
e78d9772 JH |
15 | fprintf(stderr, fmt, hex); |
16 | } | |
17 | ||
0d7a6e4e | 18 | static void report_missing(const struct object *obj) |
b2d62f16 JH |
19 | { |
20 | char missing_hex[41]; | |
ba19a808 | 21 | strcpy(missing_hex, sha1_to_hex(obj->sha1)); |
0d7a6e4e AR |
22 | fprintf(stderr, "Cannot obtain needed %s %s\n", |
23 | obj->type ? typename(obj->type): "object", missing_hex); | |
24 | if (!is_null_sha1(current_commit_sha1)) | |
25 | fprintf(stderr, "while processing commit %s.\n", | |
26 | sha1_to_hex(current_commit_sha1)); | |
b2d62f16 JH |
27 | } |
28 | ||
30ae764b | 29 | static int process(struct walker *walker, struct object *obj); |
3173bd49 | 30 | |
30ae764b | 31 | static int process_tree(struct walker *walker, struct tree *tree) |
4250a5e5 | 32 | { |
1bc995a3 | 33 | struct tree_desc desc; |
4c068a98 | 34 | struct name_entry entry; |
4250a5e5 DB |
35 | |
36 | if (parse_tree(tree)) | |
37 | return -1; | |
38 | ||
6fda5e51 | 39 | init_tree_desc(&desc, tree->buffer, tree->size); |
4c068a98 | 40 | while (tree_entry(&desc, &entry)) { |
6f9012b6 JH |
41 | struct object *obj = NULL; |
42 | ||
582c7393 | 43 | /* submodule commits are not stored in the superproject */ |
68fb4650 | 44 | if (S_ISGITLINK(entry.mode)) |
582c7393 | 45 | continue; |
4c068a98 LT |
46 | if (S_ISDIR(entry.mode)) { |
47 | struct tree *tree = lookup_tree(entry.sha1); | |
6f9012b6 JH |
48 | if (tree) |
49 | obj = &tree->object; | |
50 | } | |
51 | else { | |
4c068a98 | 52 | struct blob *blob = lookup_blob(entry.sha1); |
6f9012b6 JH |
53 | if (blob) |
54 | obj = &blob->object; | |
2d9c58c6 | 55 | } |
30ae764b | 56 | if (!obj || process(walker, obj)) |
4250a5e5 | 57 | return -1; |
4250a5e5 | 58 | } |
6e454b9a | 59 | free_tree_buffer(tree); |
4250a5e5 DB |
60 | return 0; |
61 | } | |
62 | ||
208acbfb | 63 | /* Remember to update object flag allocation in object.h */ |
24451c31 SV |
64 | #define COMPLETE (1U << 0) |
65 | #define SEEN (1U << 1) | |
66 | #define TO_SCAN (1U << 2) | |
85d106c2 | 67 | |
d0ac30f2 | 68 | static struct commit_list *complete = NULL; |
22c6e1d0 | 69 | |
30ae764b | 70 | static int process_commit(struct walker *walker, struct commit *commit) |
4250a5e5 | 71 | { |
1e8be59d | 72 | if (parse_commit(commit)) |
4250a5e5 DB |
73 | return -1; |
74 | ||
22c6e1d0 | 75 | while (complete && complete->item->date >= commit->date) { |
d0ac30f2 | 76 | pop_most_recent_commit(&complete, COMPLETE); |
22c6e1d0 | 77 | } |
22c6e1d0 | 78 | |
d0ac30f2 | 79 | if (commit->object.flags & COMPLETE) |
22c6e1d0 DB |
80 | return 0; |
81 | ||
e702496e | 82 | hashcpy(current_commit_sha1, commit->object.sha1); |
4250a5e5 | 83 | |
30ae764b | 84 | walker_say(walker, "walk %s\n", sha1_to_hex(commit->object.sha1)); |
85d106c2 | 85 | |
30ae764b DB |
86 | if (walker->get_tree) { |
87 | if (process(walker, &commit->tree->object)) | |
4250a5e5 | 88 | return -1; |
30ae764b DB |
89 | if (!walker->get_all) |
90 | walker->get_tree = 0; | |
4250a5e5 | 91 | } |
30ae764b | 92 | if (walker->get_history) { |
1e8be59d | 93 | struct commit_list *parents = commit->parents; |
4250a5e5 | 94 | for (; parents; parents = parents->next) { |
30ae764b | 95 | if (process(walker, &parents->item->object)) |
4250a5e5 DB |
96 | return -1; |
97 | } | |
98 | } | |
99 | return 0; | |
100 | } | |
101 | ||
30ae764b | 102 | static int process_tag(struct walker *walker, struct tag *tag) |
3173bd49 | 103 | { |
1e8be59d | 104 | if (parse_tag(tag)) |
3173bd49 | 105 | return -1; |
30ae764b | 106 | return process(walker, tag->tagged); |
3173bd49 DB |
107 | } |
108 | ||
1e8be59d DB |
109 | static struct object_list *process_queue = NULL; |
110 | static struct object_list **process_queue_end = &process_queue; | |
111 | ||
30ae764b | 112 | static int process_object(struct walker *walker, struct object *obj) |
3173bd49 | 113 | { |
1974632c | 114 | if (obj->type == OBJ_COMMIT) { |
30ae764b | 115 | if (process_commit(walker, (struct commit *)obj)) |
f88fcf8b DB |
116 | return -1; |
117 | return 0; | |
118 | } | |
1974632c | 119 | if (obj->type == OBJ_TREE) { |
30ae764b | 120 | if (process_tree(walker, (struct tree *)obj)) |
f88fcf8b DB |
121 | return -1; |
122 | return 0; | |
123 | } | |
1974632c | 124 | if (obj->type == OBJ_BLOB) { |
f88fcf8b DB |
125 | return 0; |
126 | } | |
1974632c | 127 | if (obj->type == OBJ_TAG) { |
30ae764b | 128 | if (process_tag(walker, (struct tag *)obj)) |
f88fcf8b | 129 | return -1; |
3173bd49 | 130 | return 0; |
f88fcf8b DB |
131 | } |
132 | return error("Unable to determine requirements " | |
133 | "of type %s for %s", | |
885a86ab | 134 | typename(obj->type), sha1_to_hex(obj->sha1)); |
f88fcf8b DB |
135 | } |
136 | ||
30ae764b | 137 | static int process(struct walker *walker, struct object *obj) |
f88fcf8b | 138 | { |
a82d07e5 SV |
139 | if (obj->flags & SEEN) |
140 | return 0; | |
141 | obj->flags |= SEEN; | |
142 | ||
80077f07 | 143 | if (has_sha1_file(obj->sha1)) { |
f88fcf8b | 144 | /* We already have it, so we should scan it now. */ |
85d106c2 | 145 | obj->flags |= TO_SCAN; |
e5f38ec3 JH |
146 | } |
147 | else { | |
7b64d06b SV |
148 | if (obj->flags & COMPLETE) |
149 | return 0; | |
30ae764b | 150 | walker->prefetch(walker, obj->sha1); |
f88fcf8b | 151 | } |
a6080a0a | 152 | |
1e8be59d DB |
153 | object_list_insert(obj, process_queue_end); |
154 | process_queue_end = &(*process_queue_end)->next; | |
1e8be59d DB |
155 | return 0; |
156 | } | |
157 | ||
30ae764b | 158 | static int loop(struct walker *walker) |
1e8be59d | 159 | { |
85d106c2 JH |
160 | struct object_list *elem; |
161 | ||
1e8be59d DB |
162 | while (process_queue) { |
163 | struct object *obj = process_queue->item; | |
85d106c2 JH |
164 | elem = process_queue; |
165 | process_queue = elem->next; | |
166 | free(elem); | |
1e8be59d DB |
167 | if (!process_queue) |
168 | process_queue_end = &process_queue; | |
169 | ||
85d106c2 JH |
170 | /* If we are not scanning this object, we placed it in |
171 | * the queue because we needed to fetch it first. | |
172 | */ | |
173 | if (! (obj->flags & TO_SCAN)) { | |
30ae764b | 174 | if (walker->fetch(walker, obj->sha1)) { |
0d7a6e4e | 175 | report_missing(obj); |
85d106c2 JH |
176 | return -1; |
177 | } | |
178 | } | |
1e8be59d DB |
179 | if (!obj->type) |
180 | parse_object(obj->sha1); | |
30ae764b | 181 | if (process_object(walker, obj)) |
f88fcf8b | 182 | return -1; |
1e8be59d DB |
183 | } |
184 | return 0; | |
3173bd49 DB |
185 | } |
186 | ||
30ae764b | 187 | static int interpret_target(struct walker *walker, char *target, unsigned char *sha1) |
cd541a68 DB |
188 | { |
189 | if (!get_sha1_hex(target, sha1)) | |
190 | return 0; | |
8d9c5010 | 191 | if (!check_refname_format(target, 0)) { |
59c69c0c | 192 | struct ref *ref = alloc_ref(target); |
c13b2633 DB |
193 | if (!walker->fetch_ref(walker, ref)) { |
194 | hashcpy(sha1, ref->old_sha1); | |
195 | free(ref); | |
cd541a68 DB |
196 | return 0; |
197 | } | |
c13b2633 | 198 | free(ref); |
cd541a68 DB |
199 | } |
200 | return -1; | |
201 | } | |
202 | ||
8da19775 | 203 | static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data) |
22c6e1d0 | 204 | { |
d0ac30f2 JH |
205 | struct commit *commit = lookup_commit_reference_gently(sha1, 1); |
206 | if (commit) { | |
207 | commit->object.flags |= COMPLETE; | |
3bc7a05b | 208 | commit_list_insert(commit, &complete); |
22c6e1d0 DB |
209 | } |
210 | return 0; | |
211 | } | |
cd541a68 | 212 | |
30ae764b | 213 | int walker_targets_stdin(char ***target, const char ***write_ref) |
8e87ca66 PB |
214 | { |
215 | int targets = 0, targets_alloc = 0; | |
f285a2d7 | 216 | struct strbuf buf = STRBUF_INIT; |
8e87ca66 | 217 | *target = NULL; *write_ref = NULL; |
8e87ca66 PB |
218 | while (1) { |
219 | char *rf_one = NULL; | |
220 | char *tg_one; | |
221 | ||
e6c019d0 | 222 | if (strbuf_getline(&buf, stdin, '\n') == EOF) |
8e87ca66 PB |
223 | break; |
224 | tg_one = buf.buf; | |
225 | rf_one = strchr(tg_one, '\t'); | |
226 | if (rf_one) | |
227 | *rf_one++ = 0; | |
228 | ||
229 | if (targets >= targets_alloc) { | |
230 | targets_alloc = targets_alloc ? targets_alloc * 2 : 64; | |
2756ca43 RS |
231 | REALLOC_ARRAY(*target, targets_alloc); |
232 | REALLOC_ARRAY(*write_ref, targets_alloc); | |
8e87ca66 | 233 | } |
9befac47 | 234 | (*target)[targets] = xstrdup(tg_one); |
8c53f071 | 235 | (*write_ref)[targets] = xstrdup_or_null(rf_one); |
8e87ca66 PB |
236 | targets++; |
237 | } | |
e6c019d0 | 238 | strbuf_release(&buf); |
8e87ca66 PB |
239 | return targets; |
240 | } | |
241 | ||
30ae764b | 242 | void walker_targets_free(int targets, char **target, const char **write_ref) |
8e87ca66 PB |
243 | { |
244 | while (targets--) { | |
245 | free(target[targets]); | |
24deea52 | 246 | if (write_ref) |
8e87ca66 PB |
247 | free((char *) write_ref[targets]); |
248 | } | |
249 | } | |
250 | ||
30ae764b DB |
251 | int walker_fetch(struct walker *walker, int targets, char **target, |
252 | const char **write_ref, const char *write_ref_log_details) | |
4250a5e5 | 253 | { |
b6b10bb4 RS |
254 | struct strbuf refname = STRBUF_INIT; |
255 | struct strbuf err = STRBUF_INIT; | |
256 | struct ref_transaction *transaction = NULL; | |
4211e4d1 | 257 | unsigned char *sha1 = xmalloc(targets * 20); |
b6b10bb4 RS |
258 | char *msg = NULL; |
259 | int i, ret = -1; | |
cd541a68 | 260 | |
98533b90 | 261 | save_commit_buffer = 0; |
4211e4d1 | 262 | |
b6b10bb4 RS |
263 | if (write_ref) { |
264 | transaction = ref_transaction_begin(&err); | |
265 | if (!transaction) { | |
266 | error("%s", err.buf); | |
267 | goto done; | |
d0740d92 | 268 | } |
cd541a68 DB |
269 | } |
270 | ||
3bc7a05b | 271 | if (!walker->get_recover) { |
cb5d709f | 272 | for_each_ref(mark_complete, NULL); |
3bc7a05b RS |
273 | commit_list_sort_by_date(&complete); |
274 | } | |
22c6e1d0 | 275 | |
4211e4d1 | 276 | for (i = 0; i < targets; i++) { |
30ae764b | 277 | if (interpret_target(walker, target[i], &sha1[20 * i])) { |
5f48741a | 278 | error("Could not interpret response from server '%s' as something to pull", target[i]); |
b6b10bb4 | 279 | goto done; |
4211e4d1 | 280 | } |
30ae764b | 281 | if (process(walker, lookup_unknown_object(&sha1[20 * i]))) |
b6b10bb4 | 282 | goto done; |
4bd18c43 | 283 | } |
4211e4d1 | 284 | |
30ae764b | 285 | if (loop(walker)) |
b6b10bb4 RS |
286 | goto done; |
287 | if (!write_ref) { | |
288 | ret = 0; | |
289 | goto done; | |
290 | } | |
4211e4d1 | 291 | if (write_ref_log_details) { |
01d678a2 | 292 | msg = xstrfmt("fetch from %s", write_ref_log_details); |
4211e4d1 PB |
293 | } else { |
294 | msg = NULL; | |
4bd18c43 | 295 | } |
4211e4d1 | 296 | for (i = 0; i < targets; i++) { |
b6b10bb4 | 297 | if (!write_ref[i]) |
4211e4d1 | 298 | continue; |
b6b10bb4 RS |
299 | strbuf_reset(&refname); |
300 | strbuf_addf(&refname, "refs/%s", write_ref[i]); | |
301 | if (ref_transaction_update(transaction, refname.buf, | |
1d147bdf | 302 | &sha1[20 * i], NULL, 0, |
db7516ab | 303 | msg ? msg : "fetch (unknown)", |
b6b10bb4 RS |
304 | &err)) { |
305 | error("%s", err.buf); | |
306 | goto done; | |
307 | } | |
308 | } | |
db7516ab | 309 | if (ref_transaction_commit(transaction, &err)) { |
b6b10bb4 RS |
310 | error("%s", err.buf); |
311 | goto done; | |
4bd18c43 | 312 | } |
4211e4d1 | 313 | |
b6b10bb4 | 314 | ret = 0; |
30ae764b | 315 | |
b6b10bb4 RS |
316 | done: |
317 | ref_transaction_free(transaction); | |
318 | free(msg); | |
319 | free(sha1); | |
320 | strbuf_release(&err); | |
321 | strbuf_release(&refname); | |
322 | return ret; | |
4250a5e5 | 323 | } |
30ae764b DB |
324 | |
325 | void walker_free(struct walker *walker) | |
326 | { | |
327 | walker->cleanup(walker); | |
328 | free(walker); | |
329 | } |