Change check_ref_format() to take a flags argument
[git/git.git] / walker.c
CommitLineData
4250a5e5 1#include "cache.h"
30ae764b 2#include "walker.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
DB
8#include "refs.h"
9
b2d62f16 10static unsigned char current_commit_sha1[20];
4250a5e5 11
30ae764b 12void walker_say(struct walker *walker, const char *fmt, const char *hex)
1e8be59d 13{
30ae764b 14 if (walker->get_verbosely)
e78d9772
JH
15 fprintf(stderr, fmt, hex);
16}
17
0d7a6e4e 18static void report_missing(const struct object *obj)
b2d62f16
JH
19{
20 char missing_hex[41];
ba19a808 21 strcpy(missing_hex, sha1_to_hex(obj->sha1));
0d7a6e4e
AR
22 fprintf(stderr, "Cannot obtain needed %s %s\n",
23 obj->type ? typename(obj->type): "object", missing_hex);
24 if (!is_null_sha1(current_commit_sha1))
25 fprintf(stderr, "while processing commit %s.\n",
26 sha1_to_hex(current_commit_sha1));
b2d62f16
JH
27}
28
30ae764b 29static int process(struct walker *walker, struct object *obj);
3173bd49 30
30ae764b 31static int process_tree(struct walker *walker, struct tree *tree)
4250a5e5 32{
1bc995a3 33 struct tree_desc desc;
4c068a98 34 struct name_entry entry;
4250a5e5
DB
35
36 if (parse_tree(tree))
37 return -1;
38
6fda5e51 39 init_tree_desc(&desc, tree->buffer, tree->size);
4c068a98 40 while (tree_entry(&desc, &entry)) {
6f9012b6
JH
41 struct object *obj = NULL;
42
582c7393 43 /* submodule commits are not stored in the superproject */
68fb4650 44 if (S_ISGITLINK(entry.mode))
582c7393 45 continue;
4c068a98
LT
46 if (S_ISDIR(entry.mode)) {
47 struct tree *tree = lookup_tree(entry.sha1);
6f9012b6
JH
48 if (tree)
49 obj = &tree->object;
50 }
51 else {
4c068a98 52 struct blob *blob = lookup_blob(entry.sha1);
6f9012b6
JH
53 if (blob)
54 obj = &blob->object;
2d9c58c6 55 }
30ae764b 56 if (!obj || process(walker, obj))
4250a5e5 57 return -1;
4250a5e5 58 }
2d9c58c6
LT
59 free(tree->buffer);
60 tree->buffer = NULL;
1bc995a3 61 tree->size = 0;
541fc218 62 tree->object.parsed = 0;
4250a5e5
DB
63 return 0;
64}
65
24451c31
SV
66#define COMPLETE (1U << 0)
67#define SEEN (1U << 1)
68#define TO_SCAN (1U << 2)
85d106c2 69
d0ac30f2 70static struct commit_list *complete = NULL;
22c6e1d0 71
30ae764b 72static int process_commit(struct walker *walker, struct commit *commit)
4250a5e5 73{
1e8be59d 74 if (parse_commit(commit))
4250a5e5
DB
75 return -1;
76
22c6e1d0 77 while (complete && complete->item->date >= commit->date) {
d0ac30f2 78 pop_most_recent_commit(&complete, COMPLETE);
22c6e1d0 79 }
22c6e1d0 80
d0ac30f2 81 if (commit->object.flags & COMPLETE)
22c6e1d0
DB
82 return 0;
83
e702496e 84 hashcpy(current_commit_sha1, commit->object.sha1);
4250a5e5 85
30ae764b 86 walker_say(walker, "walk %s\n", sha1_to_hex(commit->object.sha1));
85d106c2 87
30ae764b
DB
88 if (walker->get_tree) {
89 if (process(walker, &commit->tree->object))
4250a5e5 90 return -1;
30ae764b
DB
91 if (!walker->get_all)
92 walker->get_tree = 0;
4250a5e5 93 }
30ae764b 94 if (walker->get_history) {
1e8be59d 95 struct commit_list *parents = commit->parents;
4250a5e5 96 for (; parents; parents = parents->next) {
30ae764b 97 if (process(walker, &parents->item->object))
4250a5e5
DB
98 return -1;
99 }
100 }
101 return 0;
102}
103
30ae764b 104static int process_tag(struct walker *walker, struct tag *tag)
3173bd49 105{
1e8be59d 106 if (parse_tag(tag))
3173bd49 107 return -1;
30ae764b 108 return process(walker, tag->tagged);
3173bd49
DB
109}
110
1e8be59d
DB
111static struct object_list *process_queue = NULL;
112static struct object_list **process_queue_end = &process_queue;
113
30ae764b 114static int process_object(struct walker *walker, struct object *obj)
3173bd49 115{
1974632c 116 if (obj->type == OBJ_COMMIT) {
30ae764b 117 if (process_commit(walker, (struct commit *)obj))
f88fcf8b
DB
118 return -1;
119 return 0;
120 }
1974632c 121 if (obj->type == OBJ_TREE) {
30ae764b 122 if (process_tree(walker, (struct tree *)obj))
f88fcf8b
DB
123 return -1;
124 return 0;
125 }
1974632c 126 if (obj->type == OBJ_BLOB) {
f88fcf8b
DB
127 return 0;
128 }
1974632c 129 if (obj->type == OBJ_TAG) {
30ae764b 130 if (process_tag(walker, (struct tag *)obj))
f88fcf8b 131 return -1;
3173bd49 132 return 0;
f88fcf8b
DB
133 }
134 return error("Unable to determine requirements "
135 "of type %s for %s",
885a86ab 136 typename(obj->type), sha1_to_hex(obj->sha1));
f88fcf8b
DB
137}
138
30ae764b 139static int process(struct walker *walker, struct object *obj)
f88fcf8b 140{
a82d07e5
SV
141 if (obj->flags & SEEN)
142 return 0;
143 obj->flags |= SEEN;
144
80077f07 145 if (has_sha1_file(obj->sha1)) {
f88fcf8b 146 /* We already have it, so we should scan it now. */
85d106c2 147 obj->flags |= TO_SCAN;
e5f38ec3
JH
148 }
149 else {
7b64d06b
SV
150 if (obj->flags & COMPLETE)
151 return 0;
30ae764b 152 walker->prefetch(walker, obj->sha1);
f88fcf8b 153 }
a6080a0a 154
1e8be59d
DB
155 object_list_insert(obj, process_queue_end);
156 process_queue_end = &(*process_queue_end)->next;
1e8be59d
DB
157 return 0;
158}
159
30ae764b 160static int loop(struct walker *walker)
1e8be59d 161{
85d106c2
JH
162 struct object_list *elem;
163
1e8be59d
DB
164 while (process_queue) {
165 struct object *obj = process_queue->item;
85d106c2
JH
166 elem = process_queue;
167 process_queue = elem->next;
168 free(elem);
1e8be59d
DB
169 if (!process_queue)
170 process_queue_end = &process_queue;
171
85d106c2
JH
172 /* If we are not scanning this object, we placed it in
173 * the queue because we needed to fetch it first.
174 */
175 if (! (obj->flags & TO_SCAN)) {
30ae764b 176 if (walker->fetch(walker, obj->sha1)) {
0d7a6e4e 177 report_missing(obj);
85d106c2
JH
178 return -1;
179 }
180 }
1e8be59d
DB
181 if (!obj->type)
182 parse_object(obj->sha1);
30ae764b 183 if (process_object(walker, obj))
f88fcf8b 184 return -1;
1e8be59d
DB
185 }
186 return 0;
3173bd49
DB
187}
188
30ae764b 189static int interpret_target(struct walker *walker, char *target, unsigned char *sha1)
cd541a68
DB
190{
191 if (!get_sha1_hex(target, sha1))
192 return 0;
8d9c5010 193 if (!check_refname_format(target, 0)) {
59c69c0c 194 struct ref *ref = alloc_ref(target);
c13b2633
DB
195 if (!walker->fetch_ref(walker, ref)) {
196 hashcpy(sha1, ref->old_sha1);
197 free(ref);
cd541a68
DB
198 return 0;
199 }
c13b2633 200 free(ref);
cd541a68
DB
201 }
202 return -1;
203}
204
8da19775 205static int mark_complete(const char *path, const unsigned char *sha1, int flag, void *cb_data)
22c6e1d0 206{
d0ac30f2
JH
207 struct commit *commit = lookup_commit_reference_gently(sha1, 1);
208 if (commit) {
209 commit->object.flags |= COMPLETE;
47e44ed1 210 commit_list_insert_by_date(commit, &complete);
22c6e1d0
DB
211 }
212 return 0;
213}
cd541a68 214
30ae764b 215int walker_targets_stdin(char ***target, const char ***write_ref)
8e87ca66
PB
216{
217 int targets = 0, targets_alloc = 0;
f285a2d7 218 struct strbuf buf = STRBUF_INIT;
8e87ca66 219 *target = NULL; *write_ref = NULL;
8e87ca66
PB
220 while (1) {
221 char *rf_one = NULL;
222 char *tg_one;
223
e6c019d0 224 if (strbuf_getline(&buf, stdin, '\n') == EOF)
8e87ca66
PB
225 break;
226 tg_one = buf.buf;
227 rf_one = strchr(tg_one, '\t');
228 if (rf_one)
229 *rf_one++ = 0;
230
231 if (targets >= targets_alloc) {
232 targets_alloc = targets_alloc ? targets_alloc * 2 : 64;
233 *target = xrealloc(*target, targets_alloc * sizeof(**target));
234 *write_ref = xrealloc(*write_ref, targets_alloc * sizeof(**write_ref));
235 }
9befac47
SP
236 (*target)[targets] = xstrdup(tg_one);
237 (*write_ref)[targets] = rf_one ? xstrdup(rf_one) : NULL;
8e87ca66
PB
238 targets++;
239 }
e6c019d0 240 strbuf_release(&buf);
8e87ca66
PB
241 return targets;
242}
243
30ae764b 244void walker_targets_free(int targets, char **target, const char **write_ref)
8e87ca66
PB
245{
246 while (targets--) {
247 free(target[targets]);
24deea52 248 if (write_ref)
8e87ca66
PB
249 free((char *) write_ref[targets]);
250 }
251}
252
30ae764b
DB
253int walker_fetch(struct walker *walker, int targets, char **target,
254 const char **write_ref, 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;
4211e4d1
PB
263
264 for (i = 0; i < targets; i++) {
1b03dfed 265 if (!write_ref || !write_ref[i])
4211e4d1
PB
266 continue;
267
4431fcc4 268 lock[i] = lock_ref_sha1(write_ref[i], NULL);
4211e4d1
PB
269 if (!lock[i]) {
270 error("Can't lock ref %s", write_ref[i]);
271 goto unlock_and_fail;
d0740d92 272 }
cd541a68
DB
273 }
274
30ae764b 275 if (!walker->get_recover)
cb5d709f 276 for_each_ref(mark_complete, NULL);
22c6e1d0 277
4211e4d1 278 for (i = 0; i < targets; i++) {
30ae764b 279 if (interpret_target(walker, target[i], &sha1[20 * i])) {
5f48741a 280 error("Could not interpret response from server '%s' as something to pull", target[i]);
4211e4d1
PB
281 goto unlock_and_fail;
282 }
30ae764b 283 if (process(walker, lookup_unknown_object(&sha1[20 * i])))
4211e4d1 284 goto unlock_and_fail;
4bd18c43 285 }
4211e4d1 286
30ae764b 287 if (loop(walker))
4211e4d1
PB
288 goto unlock_and_fail;
289
290 if (write_ref_log_details) {
291 msg = xmalloc(strlen(write_ref_log_details) + 12);
292 sprintf(msg, "fetch from %s", write_ref_log_details);
293 } else {
294 msg = NULL;
4bd18c43 295 }
4211e4d1 296 for (i = 0; i < targets; i++) {
1b03dfed 297 if (!write_ref || !write_ref[i])
4211e4d1
PB
298 continue;
299 ret = write_ref_sha1(lock[i], &sha1[20 * i], msg ? msg : "fetch (unknown)");
300 lock[i] = NULL;
301 if (ret)
302 goto unlock_and_fail;
4bd18c43 303 }
4cac42b1 304 free(msg);
4bd18c43 305
cd541a68 306 return 0;
4211e4d1 307
4211e4d1
PB
308unlock_and_fail:
309 for (i = 0; i < targets; i++)
310 if (lock[i])
311 unlock_ref(lock[i]);
30ae764b 312
4211e4d1 313 return -1;
4250a5e5 314}
30ae764b
DB
315
316void walker_free(struct walker *walker)
317{
318 walker->cleanup(walker);
319 free(walker);
320}