11 static unsigned char current_commit_sha1[20];
13 void walker_say(struct walker *walker, const char *fmt, const char *hex)
15 if (walker->get_verbosely)
16 fprintf(stderr, fmt, hex);
19 static void report_missing(const struct object *obj)
22 strcpy(missing_hex, sha1_to_hex(obj->sha1));;
23 fprintf(stderr, "Cannot obtain needed %s %s\n",
24 obj->type ? typename(obj->type): "object", missing_hex);
25 if (!is_null_sha1(current_commit_sha1))
26 fprintf(stderr, "while processing commit %s.\n",
27 sha1_to_hex(current_commit_sha1));
30 static int process(struct walker *walker, struct object *obj);
32 static int process_tree(struct walker *walker, struct tree *tree)
34 struct tree_desc desc;
35 struct name_entry entry;
40 init_tree_desc(&desc, tree->buffer, tree->size);
41 while (tree_entry(&desc, &entry)) {
42 struct object *obj = NULL;
44 /* submodule commits are not stored in the superproject */
45 if (S_ISGITLINK(entry.mode))
47 if (S_ISDIR(entry.mode)) {
48 struct tree *tree = lookup_tree(entry.sha1);
53 struct blob *blob = lookup_blob(entry.sha1);
57 if (!obj || process(walker, obj))
66 #define COMPLETE (1U << 0)
67 #define SEEN (1U << 1)
68 #define TO_SCAN (1U << 2)
70 static struct commit_list *complete = NULL;
72 static int process_commit(struct walker *walker, struct commit *commit)
74 if (parse_commit(commit))
77 while (complete && complete->item->date >= commit->date) {
78 pop_most_recent_commit(&complete, COMPLETE);
81 if (commit->object.flags & COMPLETE)
84 hashcpy(current_commit_sha1, commit->object.sha1);
86 walker_say(walker, "walk %s\n", sha1_to_hex(commit->object.sha1));
88 if (walker->get_tree) {
89 if (process(walker, &commit->tree->object))
94 if (walker->get_history) {
95 struct commit_list *parents = commit->parents;
96 for (; parents; parents = parents->next) {
97 if (process(walker, &parents->item->object))
104 static int process_tag(struct walker *walker, struct tag *tag)
108 return process(walker, tag->tagged);
111 static struct object_list *process_queue = NULL;
112 static struct object_list **process_queue_end = &process_queue;
114 static int process_object(struct walker *walker, struct object *obj)
116 if (obj->type == OBJ_COMMIT) {
117 if (process_commit(walker, (struct commit *)obj))
121 if (obj->type == OBJ_TREE) {
122 if (process_tree(walker, (struct tree *)obj))
126 if (obj->type == OBJ_BLOB) {
129 if (obj->type == OBJ_TAG) {
130 if (process_tag(walker, (struct tag *)obj))
134 return error("Unable to determine requirements "
136 typename(obj->type), sha1_to_hex(obj->sha1));
139 static int process(struct walker *walker, struct object *obj)
141 if (obj->flags & SEEN)
145 if (has_sha1_file(obj->sha1)) {
146 /* We already have it, so we should scan it now. */
147 obj->flags |= TO_SCAN;
150 if (obj->flags & COMPLETE)
152 walker->prefetch(walker, obj->sha1);
155 object_list_insert(obj, process_queue_end);
156 process_queue_end = &(*process_queue_end)->next;
160 static int loop(struct walker *walker)
162 struct object_list *elem;
164 while (process_queue) {
165 struct object *obj = process_queue->item;
166 elem = process_queue;
167 process_queue = elem->next;
170 process_queue_end = &process_queue;
172 /* If we are not scanning this object, we placed it in
173 * the queue because we needed to fetch it first.
175 if (! (obj->flags & TO_SCAN)) {
176 if (walker->fetch(walker, obj->sha1)) {
182 parse_object(obj->sha1);
183 if (process_object(walker, obj))
189 static int interpret_target(struct walker *walker, char *target, unsigned char *sha1)
191 if (!get_sha1_hex(target, sha1))
193 if (!check_ref_format(target)) {
194 if (!walker->fetch_ref(walker, target, sha1)) {
201 static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data)
203 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
205 commit->object.flags |= COMPLETE;
206 insert_by_date(commit, &complete);
211 int walker_targets_stdin(char ***target, const char ***write_ref)
213 int targets = 0, targets_alloc = 0;
215 *target = NULL; *write_ref = NULL;
221 read_line(&buf, stdin, '\n');
225 rf_one = strchr(tg_one, '\t');
229 if (targets >= targets_alloc) {
230 targets_alloc = targets_alloc ? targets_alloc * 2 : 64;
231 *target = xrealloc(*target, targets_alloc * sizeof(**target));
232 *write_ref = xrealloc(*write_ref, targets_alloc * sizeof(**write_ref));
234 (*target)[targets] = xstrdup(tg_one);
235 (*write_ref)[targets] = rf_one ? xstrdup(rf_one) : NULL;
241 void walker_targets_free(int targets, char **target, const char **write_ref)
244 free(target[targets]);
245 if (write_ref && write_ref[targets])
246 free((char *) write_ref[targets]);
250 int walker_fetch(struct walker *walker, int targets, char **target,
251 const char **write_ref, const char *write_ref_log_details)
253 struct ref_lock **lock = xcalloc(targets, sizeof(struct ref_lock *));
254 unsigned char *sha1 = xmalloc(targets * 20);
259 save_commit_buffer = 0;
260 track_object_refs = 0;
262 for (i = 0; i < targets; i++) {
263 if (!write_ref || !write_ref[i])
266 lock[i] = lock_ref_sha1(write_ref[i], NULL);
268 error("Can't lock ref %s", write_ref[i]);
269 goto unlock_and_fail;
273 if (!walker->get_recover)
274 for_each_ref(mark_complete, NULL);
276 for (i = 0; i < targets; i++) {
277 if (interpret_target(walker, target[i], &sha1[20 * i])) {
278 error("Could not interpret %s as something to pull", target[i]);
279 goto unlock_and_fail;
281 if (process(walker, lookup_unknown_object(&sha1[20 * i])))
282 goto unlock_and_fail;
286 goto unlock_and_fail;
288 if (write_ref_log_details) {
289 msg = xmalloc(strlen(write_ref_log_details) + 12);
290 sprintf(msg, "fetch from %s", write_ref_log_details);
294 for (i = 0; i < targets; i++) {
295 if (!write_ref || !write_ref[i])
297 ret = write_ref_sha1(lock[i], &sha1[20 * i], msg ? msg : "fetch (unknown)");
300 goto unlock_and_fail;
307 for (i = 0; i < targets; i++)
314 void walker_free(struct walker *walker)
316 walker->cleanup(walker);