[PATCH] fetch.c: Remove redundant TO_FETCH flag
[git/gitweb.git] / fetch.c
blob390de99f2aebcc8d3098c556120af5d6298ab10a
1 #include "fetch.h"
3 #include "cache.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "tag.h"
7 #include "blob.h"
8 #include "refs.h"
10 const char *write_ref = NULL;
12 const unsigned char *current_ref = NULL;
14 int get_tree = 0;
15 int get_history = 0;
16 int get_all = 0;
17 int get_verbosely = 0;
18 static unsigned char current_commit_sha1[20];
20 void pull_say(const char *fmt, const char *hex)
22 if (get_verbosely)
23 fprintf(stderr, fmt, hex);
26 static void report_missing(const char *what, const unsigned char *missing)
28 char missing_hex[41];
30 strcpy(missing_hex, sha1_to_hex(missing));;
31 fprintf(stderr,
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;
42 if (parse_tree(tree))
43 return -1;
45 entry = tree->entries;
46 tree->entries = NULL;
47 while (entry) {
48 struct tree_entry_list *next = entry->next;
49 if (process(entry->item.any))
50 return -1;
51 free(entry);
52 entry = next;
54 return 0;
57 #define COMPLETE 1U
58 #define TO_SCAN 4U
59 #define SEEN 16U
61 static struct commit_list *complete = NULL;
63 static int process_commit(struct commit *commit)
65 if (parse_commit(commit))
66 return -1;
68 while (complete && complete->item->date >= commit->date) {
69 pop_most_recent_commit(&complete, COMPLETE);
72 if (commit->object.flags & COMPLETE)
73 return 0;
75 memcpy(current_commit_sha1, commit->object.sha1, 20);
77 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
79 if (get_tree) {
80 if (process(&commit->tree->object))
81 return -1;
82 if (!get_all)
83 get_tree = 0;
85 if (get_history) {
86 struct commit_list *parents = commit->parents;
87 for (; parents; parents = parents->next) {
88 if (process(&parents->item->object))
89 return -1;
92 return 0;
95 static int process_tag(struct tag *tag)
97 if (parse_tag(tag))
98 return -1;
99 return process(tag->tagged);
102 static struct object_list *process_queue = NULL;
103 static struct object_list **process_queue_end = &process_queue;
105 static int process_object(struct object *obj)
107 if (obj->type == commit_type) {
108 if (process_commit((struct commit *)obj))
109 return -1;
110 return 0;
112 if (obj->type == tree_type) {
113 if (process_tree((struct tree *)obj))
114 return -1;
115 return 0;
117 if (obj->type == blob_type) {
118 return 0;
120 if (obj->type == tag_type) {
121 if (process_tag((struct tag *)obj))
122 return -1;
123 return 0;
125 return error("Unable to determine requirements "
126 "of type %s for %s",
127 obj->type, sha1_to_hex(obj->sha1));
130 static int process(struct object *obj)
132 if (obj->flags & SEEN)
133 return 0;
134 obj->flags |= SEEN;
136 if (has_sha1_file(obj->sha1)) {
137 parse_object(obj->sha1);
138 /* We already have it, so we should scan it now. */
139 if (obj->flags & TO_SCAN)
140 return 0;
141 object_list_insert(obj, process_queue_end);
142 process_queue_end = &(*process_queue_end)->next;
143 obj->flags |= TO_SCAN;
144 return 0;
146 if (obj->flags & COMPLETE)
147 return 0;
148 object_list_insert(obj, process_queue_end);
149 process_queue_end = &(*process_queue_end)->next;
151 prefetch(obj->sha1);
153 return 0;
156 static int loop(void)
158 struct object_list *elem;
160 while (process_queue) {
161 struct object *obj = process_queue->item;
162 elem = process_queue;
163 process_queue = elem->next;
164 free(elem);
165 if (!process_queue)
166 process_queue_end = &process_queue;
168 /* If we are not scanning this object, we placed it in
169 * the queue because we needed to fetch it first.
171 if (! (obj->flags & TO_SCAN)) {
172 if (!has_sha1_file(obj->sha1) && fetch(obj->sha1)) {
173 report_missing(obj->type
174 ? obj->type
175 : "object", obj->sha1);
176 return -1;
179 if (!obj->type)
180 parse_object(obj->sha1);
181 if (process_object(obj))
182 return -1;
184 return 0;
187 static int interpret_target(char *target, unsigned char *sha1)
189 if (!get_sha1_hex(target, sha1))
190 return 0;
191 if (!check_ref_format(target)) {
192 if (!fetch_ref(target, sha1)) {
193 return 0;
196 return -1;
199 static int mark_complete(const char *path, const unsigned char *sha1)
201 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
202 if (commit) {
203 commit->object.flags |= COMPLETE;
204 insert_by_date(commit, &complete);
206 return 0;
209 int pull(char *target)
211 unsigned char sha1[20];
212 int fd = -1;
214 save_commit_buffer = 0;
215 if (write_ref && current_ref) {
216 fd = lock_ref_sha1(write_ref, current_ref);
217 if (fd < 0)
218 return -1;
221 for_each_ref(mark_complete);
223 if (interpret_target(target, sha1))
224 return error("Could not interpret %s as something to pull",
225 target);
226 if (process(lookup_unknown_object(sha1)))
227 return -1;
228 if (loop())
229 return -1;
231 if (write_ref) {
232 if (current_ref) {
233 write_ref_sha1(write_ref, fd, sha1);
234 } else {
235 write_ref_sha1_unlocked(write_ref, sha1);
238 return 0;