Remove "pathlen" from "struct name_entry"
[git/git.git] / fetch.c
CommitLineData
4250a5e5 1#include "cache.h"
85023577 2#include "fetch.h"
4250a5e5
DB
3#include "commit.h"
4#include "tree.h"
1bc995a3 5#include "tree-walk.h"
3173bd49
DB
6#include "tag.h"
7#include "blob.h"
cd541a68 8#include "refs.h"
8e87ca66 9#include "strbuf.h"
cd541a68 10
4250a5e5
DB
11int get_tree = 0;
12int get_history = 0;
13int get_all = 0;
e78d9772 14int get_verbosely = 0;
820eca68 15int get_recover = 0;
b2d62f16 16static unsigned char current_commit_sha1[20];
4250a5e5 17
1e8be59d
DB
18void pull_say(const char *fmt, const char *hex)
19{
e78d9772
JH
20 if (get_verbosely)
21 fprintf(stderr, fmt, hex);
22}
23
0d7a6e4e 24static void report_missing(const struct object *obj)
b2d62f16
JH
25{
26 char missing_hex[41];
0d7a6e4e
AR
27 strcpy(missing_hex, sha1_to_hex(obj->sha1));;
28 fprintf(stderr, "Cannot obtain needed %s %s\n",
29 obj->type ? typename(obj->type): "object", missing_hex);
30 if (!is_null_sha1(current_commit_sha1))
31 fprintf(stderr, "while processing commit %s.\n",
32 sha1_to_hex(current_commit_sha1));
b2d62f16
JH
33}
34
80077f07 35static int process(struct object *obj);
3173bd49 36
1e8be59d 37static int process_tree(struct tree *tree)
4250a5e5 38{
1bc995a3 39 struct tree_desc desc;
4c068a98 40 struct name_entry entry;
4250a5e5
DB
41
42 if (parse_tree(tree))
43 return -1;
44
1bc995a3
LT
45 desc.buf = tree->buffer;
46 desc.size = tree->size;
4c068a98 47 while (tree_entry(&desc, &entry)) {
6f9012b6
JH
48 struct object *obj = NULL;
49
4c068a98
LT
50 if (S_ISDIR(entry.mode)) {
51 struct tree *tree = lookup_tree(entry.sha1);
6f9012b6
JH
52 if (tree)
53 obj = &tree->object;
54 }
55 else {
4c068a98 56 struct blob *blob = lookup_blob(entry.sha1);
6f9012b6
JH
57 if (blob)
58 obj = &blob->object;
2d9c58c6 59 }
6f9012b6 60 if (!obj || process(obj))
4250a5e5 61 return -1;
4250a5e5 62 }
2d9c58c6
LT
63 free(tree->buffer);
64 tree->buffer = NULL;
1bc995a3 65 tree->size = 0;
4250a5e5
DB
66 return 0;
67}
68
24451c31
SV
69#define COMPLETE (1U << 0)
70#define SEEN (1U << 1)
71#define TO_SCAN (1U << 2)
85d106c2 72
d0ac30f2 73static struct commit_list *complete = NULL;
22c6e1d0 74
1e8be59d 75static int process_commit(struct commit *commit)
4250a5e5 76{
1e8be59d 77 if (parse_commit(commit))
4250a5e5
DB
78 return -1;
79
22c6e1d0 80 while (complete && complete->item->date >= commit->date) {
d0ac30f2 81 pop_most_recent_commit(&complete, COMPLETE);
22c6e1d0 82 }
22c6e1d0 83
d0ac30f2 84 if (commit->object.flags & COMPLETE)
22c6e1d0
DB
85 return 0;
86
e702496e 87 hashcpy(current_commit_sha1, commit->object.sha1);
4250a5e5 88
85d106c2
JH
89 pull_say("walk %s\n", sha1_to_hex(commit->object.sha1));
90
4250a5e5 91 if (get_tree) {
80077f07 92 if (process(&commit->tree->object))
4250a5e5
DB
93 return -1;
94 if (!get_all)
95 get_tree = 0;
96 }
97 if (get_history) {
1e8be59d 98 struct commit_list *parents = commit->parents;
4250a5e5 99 for (; parents; parents = parents->next) {
80077f07 100 if (process(&parents->item->object))
4250a5e5
DB
101 return -1;
102 }
103 }
104 return 0;
105}
106
1e8be59d 107static int process_tag(struct tag *tag)
3173bd49 108{
1e8be59d 109 if (parse_tag(tag))
3173bd49 110 return -1;
80077f07 111 return process(tag->tagged);
3173bd49
DB
112}
113
1e8be59d
DB
114static struct object_list *process_queue = NULL;
115static struct object_list **process_queue_end = &process_queue;
116
f88fcf8b 117static int process_object(struct object *obj)
3173bd49 118{
1974632c 119 if (obj->type == OBJ_COMMIT) {
f88fcf8b
DB
120 if (process_commit((struct commit *)obj))
121 return -1;
122 return 0;
123 }
1974632c 124 if (obj->type == OBJ_TREE) {
f88fcf8b
DB
125 if (process_tree((struct tree *)obj))
126 return -1;
127 return 0;
128 }
1974632c 129 if (obj->type == OBJ_BLOB) {
f88fcf8b
DB
130 return 0;
131 }
1974632c 132 if (obj->type == OBJ_TAG) {
f88fcf8b
DB
133 if (process_tag((struct tag *)obj))
134 return -1;
3173bd49 135 return 0;
f88fcf8b
DB
136 }
137 return error("Unable to determine requirements "
138 "of type %s for %s",
885a86ab 139 typename(obj->type), sha1_to_hex(obj->sha1));
f88fcf8b
DB
140}
141
80077f07 142static int process(struct object *obj)
f88fcf8b 143{
a82d07e5
SV
144 if (obj->flags & SEEN)
145 return 0;
146 obj->flags |= SEEN;
147
80077f07 148 if (has_sha1_file(obj->sha1)) {
f88fcf8b 149 /* We already have it, so we should scan it now. */
85d106c2 150 obj->flags |= TO_SCAN;
e5f38ec3
JH
151 }
152 else {
7b64d06b
SV
153 if (obj->flags & COMPLETE)
154 return 0;
155 prefetch(obj->sha1);
f88fcf8b 156 }
7b64d06b 157
1e8be59d
DB
158 object_list_insert(obj, process_queue_end);
159 process_queue_end = &(*process_queue_end)->next;
1e8be59d
DB
160 return 0;
161}
162
163static int loop(void)
164{
85d106c2
JH
165 struct object_list *elem;
166
1e8be59d
DB
167 while (process_queue) {
168 struct object *obj = process_queue->item;
85d106c2
JH
169 elem = process_queue;
170 process_queue = elem->next;
171 free(elem);
1e8be59d
DB
172 if (!process_queue)
173 process_queue_end = &process_queue;
174
85d106c2
JH
175 /* If we are not scanning this object, we placed it in
176 * the queue because we needed to fetch it first.
177 */
178 if (! (obj->flags & TO_SCAN)) {
11f0dafe 179 if (fetch(obj->sha1)) {
0d7a6e4e 180 report_missing(obj);
85d106c2
JH
181 return -1;
182 }
183 }
1e8be59d
DB
184 if (!obj->type)
185 parse_object(obj->sha1);
f88fcf8b
DB
186 if (process_object(obj))
187 return -1;
1e8be59d
DB
188 }
189 return 0;
3173bd49
DB
190}
191
cd541a68
DB
192static int interpret_target(char *target, unsigned char *sha1)
193{
194 if (!get_sha1_hex(target, sha1))
195 return 0;
196 if (!check_ref_format(target)) {
197 if (!fetch_ref(target, sha1)) {
198 return 0;
199 }
200 }
201 return -1;
202}
203
8da19775 204static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data)
22c6e1d0 205{
d0ac30f2
JH
206 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
207 if (commit) {
208 commit->object.flags |= COMPLETE;
209 insert_by_date(commit, &complete);
22c6e1d0
DB
210 }
211 return 0;
212}
cd541a68 213
8e87ca66
PB
214int pull_targets_stdin(char ***target, const char ***write_ref)
215{
216 int targets = 0, targets_alloc = 0;
217 struct strbuf buf;
218 *target = NULL; *write_ref = NULL;
219 strbuf_init(&buf);
220 while (1) {
221 char *rf_one = NULL;
222 char *tg_one;
223
224 read_line(&buf, stdin, '\n');
225 if (buf.eof)
226 break;
227 tg_one = buf.buf;
228 rf_one = strchr(tg_one, '\t');
229 if (rf_one)
230 *rf_one++ = 0;
231
232 if (targets >= targets_alloc) {
233 targets_alloc = targets_alloc ? targets_alloc * 2 : 64;
234 *target = xrealloc(*target, targets_alloc * sizeof(**target));
235 *write_ref = xrealloc(*write_ref, targets_alloc * sizeof(**write_ref));
236 }
9befac47
SP
237 (*target)[targets] = xstrdup(tg_one);
238 (*write_ref)[targets] = rf_one ? xstrdup(rf_one) : NULL;
8e87ca66
PB
239 targets++;
240 }
241 return targets;
242}
243
244void pull_targets_free(int targets, char **target, const char **write_ref)
245{
246 while (targets--) {
247 free(target[targets]);
1b03dfed 248 if (write_ref && write_ref[targets])
8e87ca66
PB
249 free((char *) write_ref[targets]);
250 }
251}
252
4211e4d1 253int pull(int targets, char **target, const char **write_ref,
c6b69bdb 254 const char *write_ref_log_details)
4250a5e5 255{
4211e4d1
PB
256 struct ref_lock **lock = xcalloc(targets, sizeof(struct ref_lock *));
257 unsigned char *sha1 = xmalloc(targets * 20);
d0740d92
SP
258 char *msg;
259 int ret;
4211e4d1 260 int i;
cd541a68 261
98533b90 262 save_commit_buffer = 0;
a95cb6fb 263 track_object_refs = 0;
4211e4d1
PB
264
265 for (i = 0; i < targets; i++) {
1b03dfed 266 if (!write_ref || !write_ref[i])
4211e4d1
PB
267 continue;
268
4431fcc4 269 lock[i] = lock_ref_sha1(write_ref[i], NULL);
4211e4d1
PB
270 if (!lock[i]) {
271 error("Can't lock ref %s", write_ref[i]);
272 goto unlock_and_fail;
d0740d92 273 }
cd541a68
DB
274 }
275
84c667ff 276 if (!get_recover)
cb5d709f 277 for_each_ref(mark_complete, NULL);
22c6e1d0 278
4211e4d1
PB
279 for (i = 0; i < targets; i++) {
280 if (interpret_target(target[i], &sha1[20 * i])) {
281 error("Could not interpret %s as something to pull", target[i]);
282 goto unlock_and_fail;
283 }
284 if (process(lookup_unknown_object(&sha1[20 * i])))
285 goto unlock_and_fail;
4bd18c43 286 }
4211e4d1
PB
287
288 if (loop())
289 goto unlock_and_fail;
290
291 if (write_ref_log_details) {
292 msg = xmalloc(strlen(write_ref_log_details) + 12);
293 sprintf(msg, "fetch from %s", write_ref_log_details);
294 } else {
295 msg = NULL;
4bd18c43 296 }
4211e4d1 297 for (i = 0; i < targets; i++) {
1b03dfed 298 if (!write_ref || !write_ref[i])
4211e4d1
PB
299 continue;
300 ret = write_ref_sha1(lock[i], &sha1[20 * i], msg ? msg : "fetch (unknown)");
301 lock[i] = NULL;
302 if (ret)
303 goto unlock_and_fail;
4bd18c43 304 }
4cac42b1 305 free(msg);
4bd18c43 306
cd541a68 307 return 0;
4211e4d1
PB
308
309
310unlock_and_fail:
311 for (i = 0; i < targets; i++)
312 if (lock[i])
313 unlock_ref(lock[i]);
314 return -1;
4250a5e5 315}