10 const char *write_ref = NULL;
12 const unsigned char *current_ref = NULL;
17 int get_verbosely = 0;
18 static unsigned char current_commit_sha1[20];
20 void pull_say(const char *fmt, const char *hex)
23 fprintf(stderr, fmt, hex);
26 static void report_missing(const char *what, const unsigned char *missing)
30 strcpy(missing_hex, sha1_to_hex(missing));;
32 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
33 what, missing_hex, sha1_to_hex(current_commit_sha1));
36 static int process(struct object *obj);
38 static int process_tree(struct tree *tree)
40 struct tree_entry_list *entry;
45 entry = tree->entries;
48 struct tree_entry_list *next = entry->next;
49 if (process(entry->item.any))
62 static struct commit_list *complete = NULL;
64 static int process_commit(struct commit *commit)
66 if (parse_commit(commit))
69 while (complete && complete->item->date >= commit->date) {
70 pop_most_recent_commit(&complete, COMPLETE);
73 if (commit->object.flags & COMPLETE)
76 memcpy(current_commit_sha1, commit->object.sha1, 20);
78 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
81 if (process(&commit->tree->object))
87 struct commit_list *parents = commit->parents;
88 for (; parents; parents = parents->next) {
89 if (process(&parents->item->object))
96 static int process_tag(struct tag *tag)
100 return process(tag->tagged);
103 static struct object_list *process_queue = NULL;
104 static struct object_list **process_queue_end = &process_queue;
106 static int process_object(struct object *obj)
108 if (obj->type == commit_type) {
109 if (process_commit((struct commit *)obj))
113 if (obj->type == tree_type) {
114 if (process_tree((struct tree *)obj))
118 if (obj->type == blob_type) {
121 if (obj->type == tag_type) {
122 if (process_tag((struct tag *)obj))
126 return error("Unable to determine requirements "
128 obj->type, sha1_to_hex(obj->sha1));
131 static int process(struct object *obj)
133 if (obj->flags & SEEN)
137 if (has_sha1_file(obj->sha1)) {
138 parse_object(obj->sha1);
139 /* We already have it, so we should scan it now. */
140 if (obj->flags & TO_SCAN)
142 object_list_insert(obj, process_queue_end);
143 process_queue_end = &(*process_queue_end)->next;
144 obj->flags |= TO_SCAN;
147 if (obj->flags & (COMPLETE | TO_FETCH))
149 object_list_insert(obj, process_queue_end);
150 process_queue_end = &(*process_queue_end)->next;
151 obj->flags |= TO_FETCH;
158 static int loop(void)
160 struct object_list *elem;
162 while (process_queue) {
163 struct object *obj = process_queue->item;
164 elem = process_queue;
165 process_queue = elem->next;
168 process_queue_end = &process_queue;
170 /* If we are not scanning this object, we placed it in
171 * the queue because we needed to fetch it first.
173 if (! (obj->flags & TO_SCAN)) {
174 if (!has_sha1_file(obj->sha1) && fetch(obj->sha1)) {
175 report_missing(obj->type
177 : "object", obj->sha1);
182 parse_object(obj->sha1);
183 if (process_object(obj))
189 static int interpret_target(char *target, unsigned char *sha1)
191 if (!get_sha1_hex(target, sha1))
193 if (!check_ref_format(target)) {
194 if (!fetch_ref(target, sha1)) {
201 static int mark_complete(const char *path, const unsigned char *sha1)
203 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
205 commit->object.flags |= COMPLETE;
206 insert_by_date(commit, &complete);
211 int pull(char *target)
213 unsigned char sha1[20];
216 save_commit_buffer = 0;
217 if (write_ref && current_ref) {
218 fd = lock_ref_sha1(write_ref, current_ref);
223 for_each_ref(mark_complete);
225 if (interpret_target(target, sha1))
226 return error("Could not interpret %s as something to pull",
228 if (process(lookup_unknown_object(sha1)))
235 write_ref_sha1(write_ref, fd, sha1);
237 write_ref_sha1_unlocked(write_ref, sha1);