blob: 73bde07aeaeea67e44aef7aec1b79d5806e80a1b [file] [log] [blame]
Junio C Hamano215a7ad2005-09-08 00:26:231#include "fetch.h"
Daniel Barkalow4250a5e2005-04-30 23:53:562
3#include "cache.h"
4#include "commit.h"
5#include "tree.h"
Daniel Barkalow3173bd42005-06-22 00:35:536#include "tag.h"
7#include "blob.h"
Daniel Barkalowcd541a62005-06-06 20:38:268#include "refs.h"
9
10const char *write_ref = NULL;
11
12const unsigned char *current_ref = NULL;
Daniel Barkalow4250a5e2005-04-30 23:53:5613
14int get_tree = 0;
15int get_history = 0;
16int get_all = 0;
Junio C Hamanoe78d9772005-05-06 08:37:2117int get_verbosely = 0;
Daniel Barkalow820eca62005-09-27 01:38:0818int get_recover = 0;
Junio C Hamanob2d62f12005-05-04 08:26:2419static unsigned char current_commit_sha1[20];
Daniel Barkalow4250a5e2005-04-30 23:53:5620
barkalow@iabervon.org1e8be592005-08-02 23:46:1021void pull_say(const char *fmt, const char *hex)
22{
Junio C Hamanoe78d9772005-05-06 08:37:2123 if (get_verbosely)
24 fprintf(stderr, fmt, hex);
25}
26
Junio C Hamanob2d62f12005-05-04 08:26:2427static void report_missing(const char *what, const unsigned char *missing)
Junio C Hamanoee4f4392005-05-02 04:07:4028{
Junio C Hamanob2d62f12005-05-04 08:26:2429 char missing_hex[41];
30
31 strcpy(missing_hex, sha1_to_hex(missing));;
32 fprintf(stderr,
33 "Cannot obtain needed %s %s\nwhile processing commit %s.\n",
34 what, missing_hex, sha1_to_hex(current_commit_sha1));
35}
36
Sergey Vlasov80077f02005-09-21 16:33:5437static int process(struct object *obj);
Daniel Barkalow3173bd42005-06-22 00:35:5338
barkalow@iabervon.org1e8be592005-08-02 23:46:1039static int process_tree(struct tree *tree)
Daniel Barkalow4250a5e2005-04-30 23:53:5640{
Junio C Hamano85d106c2005-09-18 08:01:0741 struct tree_entry_list *entry;
Daniel Barkalow4250a5e2005-04-30 23:53:5642
43 if (parse_tree(tree))
44 return -1;
45
Junio C Hamano85d106c2005-09-18 08:01:0746 entry = tree->entries;
47 tree->entries = NULL;
48 while (entry) {
49 struct tree_entry_list *next = entry->next;
Sergey Vlasov80077f02005-09-21 16:33:5450 if (process(entry->item.any))
Daniel Barkalow4250a5e2005-04-30 23:53:5651 return -1;
Sergey Vlasovd35bbe02005-09-23 12:28:1852 free(entry->name);
Junio C Hamano85d106c2005-09-18 08:01:0753 free(entry);
54 entry = next;
Daniel Barkalow4250a5e2005-04-30 23:53:5655 }
56 return 0;
57}
58
Sergey Vlasov24451c32005-09-21 16:34:2459#define COMPLETE (1U << 0)
60#define SEEN (1U << 1)
61#define TO_SCAN (1U << 2)
Junio C Hamano85d106c2005-09-18 08:01:0762
Junio C Hamanod0ac30f2005-09-16 21:30:2963static struct commit_list *complete = NULL;
Daniel Barkalow22c6e1d2005-09-15 01:31:4264
barkalow@iabervon.org1e8be592005-08-02 23:46:1065static int process_commit(struct commit *commit)
Daniel Barkalow4250a5e2005-04-30 23:53:5666{
barkalow@iabervon.org1e8be592005-08-02 23:46:1067 if (parse_commit(commit))
Daniel Barkalow4250a5e2005-04-30 23:53:5668 return -1;
69
Daniel Barkalow22c6e1d2005-09-15 01:31:4270 while (complete && complete->item->date >= commit->date) {
Junio C Hamanod0ac30f2005-09-16 21:30:2971 pop_most_recent_commit(&complete, COMPLETE);
Daniel Barkalow22c6e1d2005-09-15 01:31:4272 }
Daniel Barkalow22c6e1d2005-09-15 01:31:4273
Junio C Hamanod0ac30f2005-09-16 21:30:2974 if (commit->object.flags & COMPLETE)
Daniel Barkalow22c6e1d2005-09-15 01:31:4275 return 0;
76
barkalow@iabervon.org1e8be592005-08-02 23:46:1077 memcpy(current_commit_sha1, commit->object.sha1, 20);
Daniel Barkalow4250a5e2005-04-30 23:53:5678
Junio C Hamano85d106c2005-09-18 08:01:0779 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
80
Daniel Barkalow4250a5e2005-04-30 23:53:5681 if (get_tree) {
Sergey Vlasov80077f02005-09-21 16:33:5482 if (process(&commit->tree->object))
Daniel Barkalow4250a5e2005-04-30 23:53:5683 return -1;
84 if (!get_all)
85 get_tree = 0;
86 }
87 if (get_history) {
barkalow@iabervon.org1e8be592005-08-02 23:46:1088 struct commit_list *parents = commit->parents;
Daniel Barkalow4250a5e2005-04-30 23:53:5689 for (; parents; parents = parents->next) {
Sergey Vlasov80077f02005-09-21 16:33:5490 if (process(&parents->item->object))
Daniel Barkalow4250a5e2005-04-30 23:53:5691 return -1;
92 }
93 }
94 return 0;
95}
96
barkalow@iabervon.org1e8be592005-08-02 23:46:1097static int process_tag(struct tag *tag)
Daniel Barkalow3173bd42005-06-22 00:35:5398{
barkalow@iabervon.org1e8be592005-08-02 23:46:1099 if (parse_tag(tag))
Daniel Barkalow3173bd42005-06-22 00:35:53100 return -1;
Sergey Vlasov80077f02005-09-21 16:33:54101 return process(tag->tagged);
Daniel Barkalow3173bd42005-06-22 00:35:53102}
103
barkalow@iabervon.org1e8be592005-08-02 23:46:10104static struct object_list *process_queue = NULL;
105static struct object_list **process_queue_end = &process_queue;
106
Daniel Barkalowf88fcf82005-08-11 23:38:09107static int process_object(struct object *obj)
108{
109 if (obj->type == commit_type) {
110 if (process_commit((struct commit *)obj))
111 return -1;
112 return 0;
113 }
114 if (obj->type == tree_type) {
115 if (process_tree((struct tree *)obj))
116 return -1;
117 return 0;
118 }
119 if (obj->type == blob_type) {
120 return 0;
121 }
122 if (obj->type == tag_type) {
123 if (process_tag((struct tag *)obj))
124 return -1;
125 return 0;
126 }
127 return error("Unable to determine requirements "
128 "of type %s for %s",
129 obj->type, sha1_to_hex(obj->sha1));
130}
131
Sergey Vlasov80077f02005-09-21 16:33:54132static int process(struct object *obj)
Daniel Barkalow3173bd42005-06-22 00:35:53133{
Sergey Vlasova82d07e2005-09-21 16:33:59134 if (obj->flags & SEEN)
135 return 0;
136 obj->flags |= SEEN;
137
Sergey Vlasov80077f02005-09-21 16:33:54138 if (has_sha1_file(obj->sha1)) {
Daniel Barkalowf88fcf82005-08-11 23:38:09139 /* We already have it, so we should scan it now. */
Junio C Hamano85d106c2005-09-18 08:01:07140 obj->flags |= TO_SCAN;
Sergey Vlasov7b64d062005-09-21 16:34:14141 } else {
142 if (obj->flags & COMPLETE)
143 return 0;
144 prefetch(obj->sha1);
Daniel Barkalowf88fcf82005-08-11 23:38:09145 }
Sergey Vlasov7b64d062005-09-21 16:34:14146
barkalow@iabervon.org1e8be592005-08-02 23:46:10147 object_list_insert(obj, process_queue_end);
148 process_queue_end = &(*process_queue_end)->next;
barkalow@iabervon.org1e8be592005-08-02 23:46:10149 return 0;
150}
151
152static int loop(void)
153{
Junio C Hamano85d106c2005-09-18 08:01:07154 struct object_list *elem;
155
barkalow@iabervon.org1e8be592005-08-02 23:46:10156 while (process_queue) {
157 struct object *obj = process_queue->item;
Junio C Hamano85d106c2005-09-18 08:01:07158 elem = process_queue;
159 process_queue = elem->next;
160 free(elem);
barkalow@iabervon.org1e8be592005-08-02 23:46:10161 if (!process_queue)
162 process_queue_end = &process_queue;
163
Junio C Hamano85d106c2005-09-18 08:01:07164 /* If we are not scanning this object, we placed it in
165 * the queue because we needed to fetch it first.
166 */
167 if (! (obj->flags & TO_SCAN)) {
Nick Hengeveld11f0daf2005-10-11 06:22:01168 if (fetch(obj->sha1)) {
Junio C Hamano85d106c2005-09-18 08:01:07169 report_missing(obj->type
170 ? obj->type
171 : "object", obj->sha1);
172 return -1;
173 }
174 }
barkalow@iabervon.org1e8be592005-08-02 23:46:10175 if (!obj->type)
176 parse_object(obj->sha1);
Daniel Barkalowf88fcf82005-08-11 23:38:09177 if (process_object(obj))
178 return -1;
barkalow@iabervon.org1e8be592005-08-02 23:46:10179 }
180 return 0;
Daniel Barkalow3173bd42005-06-22 00:35:53181}
182
Daniel Barkalowcd541a62005-06-06 20:38:26183static int interpret_target(char *target, unsigned char *sha1)
184{
185 if (!get_sha1_hex(target, sha1))
186 return 0;
187 if (!check_ref_format(target)) {
188 if (!fetch_ref(target, sha1)) {
189 return 0;
190 }
191 }
192 return -1;
193}
194
Daniel Barkalow22c6e1d2005-09-15 01:31:42195static int mark_complete(const char *path, const unsigned char *sha1)
196{
Junio C Hamanod0ac30f2005-09-16 21:30:29197 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
198 if (commit) {
199 commit->object.flags |= COMPLETE;
200 insert_by_date(commit, &complete);
Daniel Barkalow22c6e1d2005-09-15 01:31:42201 }
202 return 0;
203}
Daniel Barkalowcd541a62005-06-06 20:38:26204
Daniel Barkalow4250a5e2005-04-30 23:53:56205int pull(char *target)
206{
Daniel Barkalow4250a5e2005-04-30 23:53:56207 unsigned char sha1[20];
Daniel Barkalowcd541a62005-06-06 20:38:26208 int fd = -1;
209
Junio C Hamano98533b92005-09-15 22:06:39210 save_commit_buffer = 0;
Sergey Vlasova95cb6f2005-09-23 12:28:13211 track_object_refs = 0;
Daniel Barkalowcd541a62005-06-06 20:38:26212 if (write_ref && current_ref) {
213 fd = lock_ref_sha1(write_ref, current_ref);
214 if (fd < 0)
215 return -1;
216 }
217
Daniel Barkalow820eca62005-09-27 01:38:08218 if (!get_recover) {
219 for_each_ref(mark_complete);
220 }
Daniel Barkalow22c6e1d2005-09-15 01:31:42221
Daniel Barkalowcd541a62005-06-06 20:38:26222 if (interpret_target(target, sha1))
223 return error("Could not interpret %s as something to pull",
224 target);
Sergey Vlasov80077f02005-09-21 16:33:54225 if (process(lookup_unknown_object(sha1)))
barkalow@iabervon.org1e8be592005-08-02 23:46:10226 return -1;
227 if (loop())
Daniel Barkalowcd541a62005-06-06 20:38:26228 return -1;
229
230 if (write_ref) {
231 if (current_ref) {
232 write_ref_sha1(write_ref, fd, sha1);
233 } else {
234 write_ref_sha1_unlocked(write_ref, sha1);
235 }
236 }
237 return 0;
Daniel Barkalow4250a5e2005-04-30 23:53:56238}