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 make_sure_we_have_it(const char *what, unsigned char *sha1)
40 if (!has_sha1_file(sha1)) {
43 report_missing(what, sha1);
48 static int process(unsigned char *sha1, const char *type);
50 static int process_tree(struct tree *tree)
52 struct tree_entry_list *entries;
57 for (entries = tree->entries; entries; entries = entries->next) {
58 if (process(entries->item.any->sha1,
59 entries->directory ? tree_type : blob_type))
65 static int process_commit(struct commit *commit)
67 if (parse_commit(commit))
70 memcpy(current_commit_sha1, commit->object.sha1, 20);
73 if (process(commit->tree->object.sha1, tree_type))
79 struct commit_list *parents = commit->parents;
80 for (; parents; parents = parents->next) {
81 if (has_sha1_file(parents->item->object.sha1))
83 if (process(parents->item->object.sha1,
91 static int process_tag(struct tag *tag)
95 return process(tag->tagged->sha1, NULL);
98 static struct object_list *process_queue = NULL;
99 static struct object_list **process_queue_end = &process_queue;
101 static int process_object(struct object *obj)
103 if (obj->type == commit_type) {
104 if (process_commit((struct commit *)obj))
108 if (obj->type == tree_type) {
109 if (process_tree((struct tree *)obj))
113 if (obj->type == blob_type) {
116 if (obj->type == tag_type) {
117 if (process_tag((struct tag *)obj))
121 return error("Unable to determine requirements "
123 obj->type, sha1_to_hex(obj->sha1));
126 static int process(unsigned char *sha1, const char *type)
128 struct object *obj = lookup_object_type(sha1, type);
129 if (has_sha1_file(sha1)) {
131 /* We already have it, so we should scan it now. */
132 return process_object(obj);
134 if (object_list_contains(process_queue, obj))
136 object_list_insert(obj, process_queue_end);
137 process_queue_end = &(*process_queue_end)->next;
139 //fprintf(stderr, "prefetch %s\n", sha1_to_hex(sha1));
145 static int loop(void)
147 while (process_queue) {
148 struct object *obj = process_queue->item;
150 fprintf(stderr, "%d objects to pull\n",
151 object_list_length(process_queue));
153 process_queue = process_queue->next;
155 process_queue_end = &process_queue;
157 //fprintf(stderr, "fetch %s\n", sha1_to_hex(obj->sha1));
159 if (make_sure_we_have_it(obj->type ?: "object",
163 parse_object(obj->sha1);
164 if (process_object(obj))
170 static int interpret_target(char *target, unsigned char *sha1)
172 if (!get_sha1_hex(target, sha1))
174 if (!check_ref_format(target)) {
175 if (!fetch_ref(target, sha1)) {
183 int pull(char *target)
185 unsigned char sha1[20];
188 if (write_ref && current_ref) {
189 fd = lock_ref_sha1(write_ref, current_ref);
194 if (interpret_target(target, sha1))
195 return error("Could not interpret %s as something to pull",
197 if (process(sha1, NULL))
204 write_ref_sha1(write_ref, fd, sha1);
206 write_ref_sha1_unlocked(write_ref, sha1);