11 const char *write_ref = NULL;
12 const char *write_ref_log_details = NULL;
17 int get_verbosely = 0;
19 static unsigned char current_commit_sha1[20];
21 void pull_say(const char *fmt, const char *hex)
24 fprintf(stderr, fmt, hex);
27 static void report_missing(const char *what, const unsigned char *missing)
31 strcpy(missing_hex, sha1_to_hex(missing));;
33 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
34 what, missing_hex, sha1_to_hex(current_commit_sha1));
37 static int process(struct object *obj);
39 static int process_tree(struct tree *tree)
41 struct tree_desc desc;
46 desc.buf = tree->buffer;
47 desc.size = tree->size;
51 const unsigned char *sha1;
53 sha1 = tree_entry_extract(&desc, &name, &mode);
54 update_tree_entry(&desc);
57 struct tree *tree = lookup_tree(sha1);
60 struct blob *blob = lookup_blob(sha1);
61 process(&blob->object);
70 #define COMPLETE (1U << 0)
71 #define SEEN (1U << 1)
72 #define TO_SCAN (1U << 2)
74 static struct commit_list *complete = NULL;
76 static int process_commit(struct commit *commit)
78 if (parse_commit(commit))
81 while (complete && complete->item->date >= commit->date) {
82 pop_most_recent_commit(&complete, COMPLETE);
85 if (commit->object.flags & COMPLETE)
88 memcpy(current_commit_sha1, commit->object.sha1, 20);
90 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
93 if (process(&commit->tree->object))
99 struct commit_list *parents = commit->parents;
100 for (; parents; parents = parents->next) {
101 if (process(&parents->item->object))
108 static int process_tag(struct tag *tag)
112 return process(tag->tagged);
115 static struct object_list *process_queue = NULL;
116 static struct object_list **process_queue_end = &process_queue;
118 static int process_object(struct object *obj)
120 if (obj->type == commit_type) {
121 if (process_commit((struct commit *)obj))
125 if (obj->type == tree_type) {
126 if (process_tree((struct tree *)obj))
130 if (obj->type == blob_type) {
133 if (obj->type == tag_type) {
134 if (process_tag((struct tag *)obj))
138 return error("Unable to determine requirements "
140 obj->type, sha1_to_hex(obj->sha1));
143 static int process(struct object *obj)
145 if (obj->flags & SEEN)
149 if (has_sha1_file(obj->sha1)) {
150 /* We already have it, so we should scan it now. */
151 obj->flags |= TO_SCAN;
153 if (obj->flags & COMPLETE)
158 object_list_insert(obj, process_queue_end);
159 process_queue_end = &(*process_queue_end)->next;
163 static int loop(void)
165 struct object_list *elem;
167 while (process_queue) {
168 struct object *obj = process_queue->item;
169 elem = process_queue;
170 process_queue = elem->next;
173 process_queue_end = &process_queue;
175 /* If we are not scanning this object, we placed it in
176 * the queue because we needed to fetch it first.
178 if (! (obj->flags & TO_SCAN)) {
179 if (fetch(obj->sha1)) {
180 report_missing(obj->type
182 : "object", obj->sha1);
187 parse_object(obj->sha1);
188 if (process_object(obj))
194 static int interpret_target(char *target, unsigned char *sha1)
196 if (!get_sha1_hex(target, sha1))
198 if (!check_ref_format(target)) {
199 if (!fetch_ref(target, sha1)) {
206 static int mark_complete(const char *path, const unsigned char *sha1)
208 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
210 commit->object.flags |= COMPLETE;
211 insert_by_date(commit, &complete);
216 int pull(char *target)
218 struct ref_lock *lock;
219 unsigned char sha1[20];
223 save_commit_buffer = 0;
224 track_object_refs = 0;
226 lock = lock_ref_sha1(write_ref, NULL, 0);
228 error("Can't lock ref %s", write_ref);
234 for_each_ref(mark_complete);
236 if (interpret_target(target, sha1)) {
237 error("Could not interpret %s as something to pull", target);
241 if (process(lookup_unknown_object(sha1))) {
251 if (write_ref_log_details) {
252 msg = xmalloc(strlen(write_ref_log_details) + 12);
253 sprintf(msg, "fetch from %s", write_ref_log_details);
256 ret = write_ref_sha1(lock, sha1, msg ? msg : "fetch (unknown)");