object_info: change member name from 'typename' to 'type_name'
[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
94f5a121 10static struct object_id current_commit_oid;
4250a5e5 11
fa262cac 12void walker_say(struct walker *walker, const char *fmt, ...)
1e8be59d 13{
fa262cac
JK
14 if (walker->get_verbosely) {
15 va_list ap;
16 va_start(ap, fmt);
17 vfprintf(stderr, fmt, ap);
18 va_end(ap);
19 }
e78d9772
JH
20}
21
0d7a6e4e 22static void report_missing(const struct object *obj)
b2d62f16 23{
0d7a6e4e 24 fprintf(stderr, "Cannot obtain needed %s %s\n",
2b87d3a8 25 obj->type ? typename(obj->type): "object",
f2fd0760 26 oid_to_hex(&obj->oid));
94f5a121 27 if (!is_null_oid(&current_commit_oid))
0d7a6e4e 28 fprintf(stderr, "while processing commit %s.\n",
94f5a121 29 oid_to_hex(&current_commit_oid));
b2d62f16
JH
30}
31
30ae764b 32static int process(struct walker *walker, struct object *obj);
3173bd49 33
30ae764b 34static int process_tree(struct walker *walker, struct tree *tree)
4250a5e5 35{
1bc995a3 36 struct tree_desc desc;
4c068a98 37 struct name_entry entry;
4250a5e5
DB
38
39 if (parse_tree(tree))
40 return -1;
41
6fda5e51 42 init_tree_desc(&desc, tree->buffer, tree->size);
4c068a98 43 while (tree_entry(&desc, &entry)) {
6f9012b6
JH
44 struct object *obj = NULL;
45
582c7393 46 /* submodule commits are not stored in the superproject */
68fb4650 47 if (S_ISGITLINK(entry.mode))
582c7393 48 continue;
4c068a98 49 if (S_ISDIR(entry.mode)) {
740ee055 50 struct tree *tree = lookup_tree(entry.oid);
6f9012b6
JH
51 if (tree)
52 obj = &tree->object;
53 }
54 else {
3aca1fc6 55 struct blob *blob = lookup_blob(entry.oid);
6f9012b6
JH
56 if (blob)
57 obj = &blob->object;
2d9c58c6 58 }
30ae764b 59 if (!obj || process(walker, obj))
4250a5e5 60 return -1;
4250a5e5 61 }
6e454b9a 62 free_tree_buffer(tree);
4250a5e5
DB
63 return 0;
64}
65
208acbfb 66/* Remember to update object flag allocation in object.h */
24451c31
SV
67#define COMPLETE (1U << 0)
68#define SEEN (1U << 1)
69#define TO_SCAN (1U << 2)
85d106c2 70
d0ac30f2 71static struct commit_list *complete = NULL;
22c6e1d0 72
30ae764b 73static int process_commit(struct walker *walker, struct commit *commit)
4250a5e5 74{
1e8be59d 75 if (parse_commit(commit))
4250a5e5
DB
76 return -1;
77
22c6e1d0 78 while (complete && complete->item->date >= commit->date) {
d0ac30f2 79 pop_most_recent_commit(&complete, COMPLETE);
22c6e1d0 80 }
22c6e1d0 81
d0ac30f2 82 if (commit->object.flags & COMPLETE)
22c6e1d0
DB
83 return 0;
84
94f5a121 85 oidcpy(&current_commit_oid, &commit->object.oid);
4250a5e5 86
f2fd0760 87 walker_say(walker, "walk %s\n", oid_to_hex(&commit->object.oid));
85d106c2 88
30ae764b
DB
89 if (walker->get_tree) {
90 if (process(walker, &commit->tree->object))
4250a5e5 91 return -1;
30ae764b
DB
92 if (!walker->get_all)
93 walker->get_tree = 0;
4250a5e5 94 }
30ae764b 95 if (walker->get_history) {
1e8be59d 96 struct commit_list *parents = commit->parents;
4250a5e5 97 for (; parents; parents = parents->next) {
30ae764b 98 if (process(walker, &parents->item->object))
4250a5e5
DB
99 return -1;
100 }
101 }
102 return 0;
103}
104
30ae764b 105static int process_tag(struct walker *walker, struct tag *tag)
3173bd49 106{
1e8be59d 107 if (parse_tag(tag))
3173bd49 108 return -1;
30ae764b 109 return process(walker, tag->tagged);
3173bd49
DB
110}
111
1e8be59d
DB
112static struct object_list *process_queue = NULL;
113static struct object_list **process_queue_end = &process_queue;
114
30ae764b 115static int process_object(struct walker *walker, struct object *obj)
3173bd49 116{
1974632c 117 if (obj->type == OBJ_COMMIT) {
30ae764b 118 if (process_commit(walker, (struct commit *)obj))
f88fcf8b
DB
119 return -1;
120 return 0;
121 }
1974632c 122 if (obj->type == OBJ_TREE) {
30ae764b 123 if (process_tree(walker, (struct tree *)obj))
f88fcf8b
DB
124 return -1;
125 return 0;
126 }
1974632c 127 if (obj->type == OBJ_BLOB) {
f88fcf8b
DB
128 return 0;
129 }
1974632c 130 if (obj->type == OBJ_TAG) {
30ae764b 131 if (process_tag(walker, (struct tag *)obj))
f88fcf8b 132 return -1;
3173bd49 133 return 0;
f88fcf8b
DB
134 }
135 return error("Unable to determine requirements "
136 "of type %s for %s",
f2fd0760 137 typename(obj->type), oid_to_hex(&obj->oid));
f88fcf8b
DB
138}
139
30ae764b 140static int process(struct walker *walker, struct object *obj)
f88fcf8b 141{
a82d07e5
SV
142 if (obj->flags & SEEN)
143 return 0;
144 obj->flags |= SEEN;
145
f2fd0760 146 if (has_object_file(&obj->oid)) {
f88fcf8b 147 /* We already have it, so we should scan it now. */
85d106c2 148 obj->flags |= TO_SCAN;
e5f38ec3
JH
149 }
150 else {
7b64d06b
SV
151 if (obj->flags & COMPLETE)
152 return 0;
ed1c9977 153 walker->prefetch(walker, obj->oid.hash);
f88fcf8b 154 }
a6080a0a 155
1e8be59d
DB
156 object_list_insert(obj, process_queue_end);
157 process_queue_end = &(*process_queue_end)->next;
1e8be59d
DB
158 return 0;
159}
160
30ae764b 161static int loop(struct walker *walker)
1e8be59d 162{
85d106c2
JH
163 struct object_list *elem;
164
1e8be59d
DB
165 while (process_queue) {
166 struct object *obj = process_queue->item;
85d106c2
JH
167 elem = process_queue;
168 process_queue = elem->next;
169 free(elem);
1e8be59d
DB
170 if (!process_queue)
171 process_queue_end = &process_queue;
172
85d106c2
JH
173 /* If we are not scanning this object, we placed it in
174 * the queue because we needed to fetch it first.
175 */
176 if (! (obj->flags & TO_SCAN)) {
ed1c9977 177 if (walker->fetch(walker, obj->oid.hash)) {
0d7a6e4e 178 report_missing(obj);
85d106c2
JH
179 return -1;
180 }
181 }
1e8be59d 182 if (!obj->type)
c251c83d 183 parse_object(&obj->oid);
30ae764b 184 if (process_object(walker, obj))
f88fcf8b 185 return -1;
1e8be59d
DB
186 }
187 return 0;
3173bd49
DB
188}
189
94f5a121 190static int interpret_target(struct walker *walker, char *target, struct object_id *oid)
cd541a68 191{
94f5a121 192 if (!get_oid_hex(target, oid))
cd541a68 193 return 0;
8d9c5010 194 if (!check_refname_format(target, 0)) {
59c69c0c 195 struct ref *ref = alloc_ref(target);
c13b2633 196 if (!walker->fetch_ref(walker, ref)) {
94f5a121 197 oidcpy(oid, &ref->old_oid);
c13b2633 198 free(ref);
cd541a68
DB
199 return 0;
200 }
c13b2633 201 free(ref);
cd541a68
DB
202 }
203 return -1;
204}
205
b4ebaf9e
MH
206static int mark_complete(const char *path, const struct object_id *oid,
207 int flag, void *cb_data)
22c6e1d0 208{
bc83266a 209 struct commit *commit = lookup_commit_reference_gently(oid, 1);
b4ebaf9e 210
d0ac30f2
JH
211 if (commit) {
212 commit->object.flags |= COMPLETE;
3bc7a05b 213 commit_list_insert(commit, &complete);
22c6e1d0
DB
214 }
215 return 0;
216}
cd541a68 217
30ae764b 218int walker_targets_stdin(char ***target, const char ***write_ref)
8e87ca66
PB
219{
220 int targets = 0, targets_alloc = 0;
f285a2d7 221 struct strbuf buf = STRBUF_INIT;
8e87ca66 222 *target = NULL; *write_ref = NULL;
8e87ca66
PB
223 while (1) {
224 char *rf_one = NULL;
225 char *tg_one;
226
8f309aeb 227 if (strbuf_getline_lf(&buf, stdin) == EOF)
8e87ca66
PB
228 break;
229 tg_one = buf.buf;
230 rf_one = strchr(tg_one, '\t');
231 if (rf_one)
232 *rf_one++ = 0;
233
234 if (targets >= targets_alloc) {
235 targets_alloc = targets_alloc ? targets_alloc * 2 : 64;
2756ca43
RS
236 REALLOC_ARRAY(*target, targets_alloc);
237 REALLOC_ARRAY(*write_ref, targets_alloc);
8e87ca66 238 }
9befac47 239 (*target)[targets] = xstrdup(tg_one);
8c53f071 240 (*write_ref)[targets] = xstrdup_or_null(rf_one);
8e87ca66
PB
241 targets++;
242 }
e6c019d0 243 strbuf_release(&buf);
8e87ca66
PB
244 return targets;
245}
246
30ae764b 247void walker_targets_free(int targets, char **target, const char **write_ref)
8e87ca66
PB
248{
249 while (targets--) {
250 free(target[targets]);
24deea52 251 if (write_ref)
8e87ca66
PB
252 free((char *) write_ref[targets]);
253 }
254}
255
30ae764b
DB
256int walker_fetch(struct walker *walker, int targets, char **target,
257 const char **write_ref, const char *write_ref_log_details)
4250a5e5 258{
b6b10bb4
RS
259 struct strbuf refname = STRBUF_INIT;
260 struct strbuf err = STRBUF_INIT;
261 struct ref_transaction *transaction = NULL;
94f5a121 262 struct object_id *oids = xmalloc(targets * sizeof(struct object_id));
b6b10bb4
RS
263 char *msg = NULL;
264 int i, ret = -1;
cd541a68 265
98533b90 266 save_commit_buffer = 0;
4211e4d1 267
b6b10bb4
RS
268 if (write_ref) {
269 transaction = ref_transaction_begin(&err);
270 if (!transaction) {
271 error("%s", err.buf);
272 goto done;
d0740d92 273 }
cd541a68
DB
274 }
275
3bc7a05b 276 if (!walker->get_recover) {
b4ebaf9e 277 for_each_ref(mark_complete, NULL);
3bc7a05b
RS
278 commit_list_sort_by_date(&complete);
279 }
22c6e1d0 280
4211e4d1 281 for (i = 0; i < targets; i++) {
94f5a121 282 if (interpret_target(walker, target[i], oids + i)) {
5f48741a 283 error("Could not interpret response from server '%s' as something to pull", target[i]);
b6b10bb4 284 goto done;
4211e4d1 285 }
94f5a121 286 if (process(walker, lookup_unknown_object(oids[i].hash)))
b6b10bb4 287 goto done;
4bd18c43 288 }
4211e4d1 289
30ae764b 290 if (loop(walker))
b6b10bb4
RS
291 goto done;
292 if (!write_ref) {
293 ret = 0;
294 goto done;
295 }
4211e4d1 296 if (write_ref_log_details) {
01d678a2 297 msg = xstrfmt("fetch from %s", write_ref_log_details);
4211e4d1
PB
298 } else {
299 msg = NULL;
4bd18c43 300 }
4211e4d1 301 for (i = 0; i < targets; i++) {
b6b10bb4 302 if (!write_ref[i])
4211e4d1 303 continue;
b6b10bb4
RS
304 strbuf_reset(&refname);
305 strbuf_addf(&refname, "refs/%s", write_ref[i]);
306 if (ref_transaction_update(transaction, refname.buf,
89f3bbdd 307 oids + i, NULL, 0,
db7516ab 308 msg ? msg : "fetch (unknown)",
b6b10bb4
RS
309 &err)) {
310 error("%s", err.buf);
311 goto done;
312 }
313 }
db7516ab 314 if (ref_transaction_commit(transaction, &err)) {
b6b10bb4
RS
315 error("%s", err.buf);
316 goto done;
4bd18c43 317 }
4211e4d1 318
b6b10bb4 319 ret = 0;
30ae764b 320
b6b10bb4
RS
321done:
322 ref_transaction_free(transaction);
323 free(msg);
94f5a121 324 free(oids);
b6b10bb4
RS
325 strbuf_release(&err);
326 strbuf_release(&refname);
327 return ret;
4250a5e5 328}
30ae764b
DB
329
330void walker_free(struct walker *walker)
331{
332 walker->cleanup(walker);
333 free(walker);
334}