object: convert parse_object* to take struct object_id
[git/git.git] / builtin / fsck.c
CommitLineData
baffc0e7 1#include "builtin.h"
4b182421 2#include "cache.h"
ff5ebe39
DB
3#include "commit.h"
4#include "tree.h"
5#include "blob.h"
c418eda4 6#include "tag.h"
944d8589 7#include "refs.h"
f9253394 8#include "pack.h"
53dc3f3e 9#include "cache-tree.h"
e9a95bef 10#include "tree-walk.h"
271b8d25 11#include "fsck.h"
5ac0a206 12#include "parse-options.h"
8ca12c0d 13#include "dir.h"
1e49f22f 14#include "progress.h"
6f7f3beb 15#include "streaming.h"
90cf590f 16#include "decorate.h"
ff5ebe39
DB
17
18#define REACHABLE 0x0001
2d9c58c6 19#define SEEN 0x0002
6e454b9a 20#define HAS_OBJ 0x0004
d9839e03 21
96f1e58f
DR
22static int show_root;
23static int show_tags;
24static int show_unreachable;
566842f6 25static int include_reflogs = 1;
f29cd393 26static int check_full = 1;
02976bf8 27static int connectivity_only;
96f1e58f
DR
28static int check_strict;
29static int keep_cache_objects;
22410549
JS
30static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
31static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
635b99a0 32static struct object_id head_oid;
469e2ebf 33static const char *head_points_at;
e2b4f635 34static int errors_found;
68f6c019 35static int write_lost_and_found;
20f1eb6b 36static int verbose;
1e49f22f 37static int show_progress = -1;
c6a13b2c 38static int show_dangling = 1;
90cf590f 39static int name_objects;
e2b4f635
JH
40#define ERROR_OBJECT 01
41#define ERROR_REACHABLE 02
a3ed7552 42#define ERROR_PACK 04
122f76f5 43#define ERROR_REFS 010
d9839e03 44
993a21b0
JS
45static const char *describe_object(struct object *obj)
46{
90cf590f
JS
47 static struct strbuf buf = STRBUF_INIT;
48 char *name = name_objects ?
49 lookup_decoration(fsck_walk_options.object_names, obj) : NULL;
50
51 strbuf_reset(&buf);
52 strbuf_addstr(&buf, oid_to_hex(&obj->oid));
53 if (name)
54 strbuf_addf(&buf, " (%s)", name);
55
56 return buf.buf;
993a21b0
JS
57}
58
97ca7ca8
JK
59static const char *printable_type(struct object *obj)
60{
61 const char *ret;
62
a2b22854
JK
63 if (obj->type == OBJ_NONE) {
64 enum object_type type = sha1_object_info(obj->oid.hash, NULL);
65 if (type > 0)
66 object_as_type(obj, type, 0);
67 }
68
97ca7ca8
JK
69 ret = typename(obj->type);
70 if (!ret)
71 ret = "unknown";
72
73 return ret;
74}
75
2becf00f 76static int fsck_config(const char *var, const char *value, void *cb)
f1f0d088 77{
1335f732
JS
78 if (strcmp(var, "fsck.skiplist") == 0) {
79 const char *path;
80 struct strbuf sb = STRBUF_INIT;
81
82 if (git_config_pathname(&path, var, value))
83 return 1;
84 strbuf_addf(&sb, "skiplist=%s", path);
85 free((char *)path);
86 fsck_set_msg_types(&fsck_obj_options, sb.buf);
87 strbuf_release(&sb);
88 return 0;
89 }
90
2becf00f
JS
91 if (skip_prefix(var, "fsck.", &var)) {
92 fsck_set_msg_type(&fsck_obj_options, var, value);
93 return 0;
94 }
95
96 return git_default_config(var, value, cb);
97}
98
c99ba492
JS
99static void objreport(struct object *obj, const char *msg_type,
100 const char *err)
f1f0d088 101{
c99ba492 102 fprintf(stderr, "%s in %s %s: %s\n",
97ca7ca8 103 msg_type, printable_type(obj), describe_object(obj), err);
f1f0d088
PB
104}
105
c99ba492 106static int objerror(struct object *obj, const char *err)
f1f0d088 107{
e2b4f635 108 errors_found |= ERROR_OBJECT;
c99ba492 109 objreport(obj, "error", err);
f1f0d088
PB
110 return -1;
111}
112
1cd772cc
JS
113static int fsck_error_func(struct fsck_options *o,
114 struct object *obj, int type, const char *message)
f1f0d088 115{
c99ba492 116 objreport(obj, (type == FSCK_WARN) ? "warning" : "error", message);
ba002f3b 117 return (type == FSCK_WARN) ? 0 : 1;
f1f0d088
PB
118}
119
04d39759
LT
120static struct object_array pending;
121
22410549 122static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
271b8d25 123{
271b8d25 124 struct object *parent = data;
271b8d25 125
a1cdc251
JH
126 /*
127 * The only case data is NULL or type is OBJ_ANY is when
128 * mark_object_reachable() calls us. All the callers of
129 * that function has non-NULL obj hence ...
130 */
271b8d25 131 if (!obj) {
a1cdc251 132 /* ... these references to parent->fld are safe here */
271b8d25 133 printf("broken link from %7s %s\n",
97ca7ca8 134 printable_type(parent), describe_object(parent));
271b8d25
MK
135 printf("broken link from %7s %s\n",
136 (type == OBJ_ANY ? "unknown" : typename(type)), "unknown");
137 errors_found |= ERROR_REACHABLE;
138 return 1;
139 }
140
141 if (type != OBJ_ANY && obj->type != type)
a1cdc251 142 /* ... and the reference to parent is safe here */
271b8d25
MK
143 objerror(parent, "wrong object type in link");
144
145 if (obj->flags & REACHABLE)
146 return 0;
147 obj->flags |= REACHABLE;
6e454b9a 148 if (!(obj->flags & HAS_OBJ)) {
f2fd0760 149 if (parent && !has_object_file(&obj->oid)) {
271b8d25 150 printf("broken link from %7s %s\n",
97ca7ca8 151 printable_type(parent), describe_object(parent));
271b8d25 152 printf(" to %7s %s\n",
97ca7ca8 153 printable_type(obj), describe_object(obj));
271b8d25
MK
154 errors_found |= ERROR_REACHABLE;
155 }
156 return 1;
157 }
158
16aa3bfc 159 add_object_array(obj, NULL, &pending);
04d39759
LT
160 return 0;
161}
162
163static void mark_object_reachable(struct object *obj)
164{
22410549 165 mark_object(obj, OBJ_ANY, NULL, NULL);
04d39759
LT
166}
167
a1cdc251 168static int traverse_one_object(struct object *obj)
04d39759
LT
169{
170 int result;
171 struct tree *tree = NULL;
172
271b8d25 173 if (obj->type == OBJ_TREE) {
271b8d25
MK
174 tree = (struct tree *)obj;
175 if (parse_tree(tree) < 0)
176 return 1; /* error already displayed */
177 }
22410549 178 result = fsck_walk(obj, obj, &fsck_walk_options);
6e454b9a
JK
179 if (tree)
180 free_tree_buffer(tree);
271b8d25
MK
181 return result;
182}
183
04d39759 184static int traverse_reachable(void)
271b8d25 185{
1e49f22f
NTND
186 struct progress *progress = NULL;
187 unsigned int nr = 0;
04d39759 188 int result = 0;
1e49f22f 189 if (show_progress)
754dbc43 190 progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
04d39759
LT
191 while (pending.nr) {
192 struct object_array_entry *entry;
c0aa335c 193 struct object *obj;
04d39759
LT
194
195 entry = pending.objects + --pending.nr;
196 obj = entry->item;
a1cdc251 197 result |= traverse_one_object(obj);
1e49f22f 198 display_progress(progress, ++nr);
04d39759 199 }
1e49f22f 200 stop_progress(&progress);
04d39759 201 return !!result;
271b8d25
MK
202}
203
22410549 204static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
271b8d25
MK
205{
206 if (!obj)
207 return 1;
208 obj->used = 1;
209 return 0;
f1f0d088
PB
210}
211
18af29f2
LT
212/*
213 * Check a single reachable object
214 */
215static void check_reachable_object(struct object *obj)
216{
18af29f2
LT
217 /*
218 * We obviously want the object to be parsed,
219 * except if it was in a pack-file and we didn't
220 * do a full fsck
221 */
6e454b9a 222 if (!(obj->flags & HAS_OBJ)) {
ed1c9977 223 if (has_sha1_pack(obj->oid.hash))
18af29f2 224 return; /* it is in pack - forget about it */
97ca7ca8 225 printf("missing %s %s\n", printable_type(obj),
993a21b0 226 describe_object(obj));
e2b4f635 227 errors_found |= ERROR_REACHABLE;
18af29f2
LT
228 return;
229 }
18af29f2
LT
230}
231
232/*
233 * Check a single unreachable object
234 */
235static void check_unreachable_object(struct object *obj)
236{
237 /*
238 * Missing unreachable object? Ignore it. It's not like
239 * we miss it (since it can't be reached), nor do we want
240 * to complain about it being unreachable (since it does
241 * not exist).
242 */
b4584e4f 243 if (!(obj->flags & HAS_OBJ))
18af29f2
LT
244 return;
245
246 /*
247 * Unreachable object that exists? Show it if asked to,
248 * since this is something that is prunable.
249 */
250 if (show_unreachable) {
97ca7ca8 251 printf("unreachable %s %s\n", printable_type(obj),
993a21b0 252 describe_object(obj));
18af29f2
LT
253 return;
254 }
255
256 /*
257 * "!used" means that nothing at all points to it, including
3dff5379 258 * other unreachable objects. In other words, it's the "tip"
18af29f2
LT
259 * of some set of unreachable objects, usually a commit that
260 * got dropped.
261 *
262 * Such starting points are more interesting than some random
263 * set of unreachable objects, so we show them even if the user
264 * hasn't asked for _all_ unreachable objects. If you have
265 * deleted a branch by mistake, this is a prime candidate to
266 * start looking at, for example.
267 */
268 if (!obj->used) {
c6a13b2c 269 if (show_dangling)
97ca7ca8 270 printf("dangling %s %s\n", printable_type(obj),
993a21b0 271 describe_object(obj));
68f6c019 272 if (write_lost_and_found) {
fcd12db6 273 char *filename = git_pathdup("lost-found/%s/%s",
68f6c019 274 obj->type == OBJ_COMMIT ? "commit" : "other",
993a21b0 275 describe_object(obj));
68f6c019
JS
276 FILE *f;
277
dcf69262 278 if (safe_create_leading_directories_const(filename)) {
68f6c019 279 error("Could not create lost-found");
fcd12db6 280 free(filename);
68f6c019
JS
281 return;
282 }
283 if (!(f = fopen(filename, "w")))
0721c314 284 die_errno("Could not open '%s'", filename);
16a7fcfe 285 if (obj->type == OBJ_BLOB) {
7eda0e4f 286 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
eb726f2d 287 die_errno("Could not write '%s'", filename);
16a7fcfe 288 } else
993a21b0 289 fprintf(f, "%s\n", describe_object(obj));
47d32af2 290 if (fclose(f))
d824cbba
TR
291 die_errno("Could not finish '%s'",
292 filename);
fcd12db6 293 free(filename);
68f6c019 294 }
18af29f2
LT
295 return;
296 }
297
298 /*
299 * Otherwise? It's there, it's unreachable, and some other unreachable
300 * object points to it. Ignore it - it's not interesting, and we showed
301 * all the interesting cases above.
302 */
303}
304
305static void check_object(struct object *obj)
306{
20f1eb6b 307 if (verbose)
993a21b0 308 fprintf(stderr, "Checking %s\n", describe_object(obj));
20f1eb6b 309
18af29f2
LT
310 if (obj->flags & REACHABLE)
311 check_reachable_object(obj);
312 else
313 check_unreachable_object(obj);
314}
f1f0d088 315
8ba0bbb2
LT
316static void check_connectivity(void)
317{
fc046a75 318 int i, max;
8ba0bbb2 319
04d39759
LT
320 /* Traverse the pending reachable objects */
321 traverse_reachable();
322
8ba0bbb2 323 /* Look up all the requirements, warn about missing objects.. */
fc046a75 324 max = get_max_object_index();
20f1eb6b
JS
325 if (verbose)
326 fprintf(stderr, "Checking connectivity (%d objects)\n", max);
327
fc046a75 328 for (i = 0; i < max; i++) {
fc046a75 329 struct object *obj = get_indexed_object(i);
8ba0bbb2 330
18af29f2
LT
331 if (obj)
332 check_object(obj);
8ba0bbb2
LT
333 }
334}
335
c9486eb0 336static int fsck_obj(struct object *obj)
85003492 337{
ba002f3b 338 if (obj->flags & SEEN)
85003492 339 return 0;
ba002f3b 340 obj->flags |= SEEN;
85003492 341
20f1eb6b 342 if (verbose)
ba002f3b 343 fprintf(stderr, "Checking %s %s\n",
97ca7ca8 344 printable_type(obj), describe_object(obj));
42ea9cb2 345
22410549 346 if (fsck_walk(obj, NULL, &fsck_obj_options))
ba002f3b 347 objerror(obj, "broken links");
22410549 348 if (fsck_object(obj, NULL, 0, &fsck_obj_options))
ba002f3b 349 return -1;
85003492 350
ba002f3b
MK
351 if (obj->type == OBJ_TREE) {
352 struct tree *item = (struct tree *) obj;
85003492 353
6e454b9a 354 free_tree_buffer(item);
1ea34e36 355 }
1ea34e36 356
ba002f3b
MK
357 if (obj->type == OBJ_COMMIT) {
358 struct commit *commit = (struct commit *) obj;
de2eb7f6 359
0fb370da 360 free_commit_buffer(commit);
4728b861 361
ba002f3b 362 if (!commit->parents && show_root)
993a21b0 363 printf("root %s\n", describe_object(&commit->object));
ba002f3b 364 }
92d4c85d 365
ba002f3b
MK
366 if (obj->type == OBJ_TAG) {
367 struct tag *tag = (struct tag *) obj;
20f1eb6b 368
ba002f3b 369 if (show_tags && tag->tagged) {
97ca7ca8 370 printf("tagged %s %s", printable_type(tag->tagged),
993a21b0
JS
371 describe_object(tag->tagged));
372 printf(" (%s) in %s\n", tag->tag,
373 describe_object(&tag->object));
ba002f3b 374 }
92d4c85d 375 }
889262ea 376
ff5ebe39 377 return 0;
20222118
LT
378}
379
9fd75046 380static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
c9486eb0
NTND
381 unsigned long size, void *buffer, int *eaten)
382{
ec9d2249
NTND
383 /*
384 * Note, buffer may be NULL if type is OBJ_BLOB. See
385 * verify_packfile(), data_valid variable for details.
386 */
c9486eb0 387 struct object *obj;
c251c83d 388 obj = parse_object_buffer(oid, type, size, buffer, eaten);
c9486eb0
NTND
389 if (!obj) {
390 errors_found |= ERROR_OBJECT;
9fd75046 391 return error("%s: object corrupt or missing", oid_to_hex(oid));
c9486eb0 392 }
6e454b9a 393 obj->flags = HAS_OBJ;
c9486eb0
NTND
394 return fsck_obj(obj);
395}
396
96f1e58f 397static int default_refs;
944d8589 398
9461d272 399static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
90cf590f 400 unsigned long timestamp)
55dd5526
JH
401{
402 struct object *obj;
403
9461d272 404 if (!is_null_oid(oid)) {
405 obj = lookup_object(oid->hash);
c2d17b3b 406 if (obj && (obj->flags & HAS_OBJ)) {
90cf590f
JS
407 if (timestamp && name_objects)
408 add_decoration(fsck_walk_options.object_names,
409 obj,
410 xstrfmt("%s@{%ld}", refname, timestamp));
55dd5526 411 obj->used = 1;
271b8d25 412 mark_object_reachable(obj);
19bf6c9b 413 } else {
9461d272 414 error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
19bf6c9b 415 errors_found |= ERROR_REACHABLE;
55dd5526
JH
416 }
417 }
d66ae59b
MH
418}
419
9461d272 420static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
883d60fa
JS
421 const char *email, unsigned long timestamp, int tz,
422 const char *message, void *cb_data)
55dd5526 423{
19bf6c9b 424 const char *refname = cb_data;
55dd5526 425
20f1eb6b
JS
426 if (verbose)
427 fprintf(stderr, "Checking reflog %s->%s\n",
9461d272 428 oid_to_hex(ooid), oid_to_hex(noid));
20f1eb6b 429
9461d272 430 fsck_handle_reflog_oid(refname, ooid, 0);
431 fsck_handle_reflog_oid(refname, noid, timestamp);
55dd5526
JH
432 return 0;
433}
434
635b99a0
MH
435static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
436 int flag, void *cb_data)
eb8381c8 437{
19bf6c9b 438 for_each_reflog_ent(logname, fsck_handle_reflog_ent, (void *)logname);
eb8381c8
NP
439 return 0;
440}
441
635b99a0
MH
442static int fsck_handle_ref(const char *refname, const struct object_id *oid,
443 int flag, void *cb_data)
1024932f 444{
1024932f
LT
445 struct object *obj;
446
c251c83d 447 obj = parse_object(oid);
8a498a05 448 if (!obj) {
635b99a0 449 error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
30d1038d 450 errors_found |= ERROR_REACHABLE;
944d8589
LT
451 /* We'll continue with the rest despite the error.. */
452 return 0;
8a498a05 453 }
122f76f5 454 if (obj->type != OBJ_COMMIT && is_branch(refname)) {
6232f62b 455 error("%s: not a commit", refname);
122f76f5
JH
456 errors_found |= ERROR_REFS;
457 }
944d8589 458 default_refs++;
1024932f 459 obj->used = 1;
90cf590f
JS
460 if (name_objects)
461 add_decoration(fsck_walk_options.object_names,
462 obj, xstrdup(refname));
271b8d25 463 mark_object_reachable(obj);
55dd5526 464
7c4d07c7 465 return 0;
1024932f
LT
466}
467
1024932f
LT
468static void get_default_heads(void)
469{
635b99a0
MH
470 if (head_points_at && !is_null_oid(&head_oid))
471 fsck_handle_ref("HEAD", &head_oid, 0, NULL);
472 for_each_rawref(fsck_handle_ref, NULL);
566842f6 473 if (include_reflogs)
635b99a0 474 for_each_reflog(fsck_handle_reflog, NULL);
071fa89e
LT
475
476 /*
477 * Not having any default heads isn't really fatal, but
478 * it does mean that "--unreachable" no longer makes any
479 * sense (since in this case everything will obviously
480 * be unreachable by definition.
481 *
482 * Showing dangling objects is valid, though (as those
483 * dangling objects are likely lost heads).
484 *
485 * So we just print a warning about it, and clear the
486 * "show_unreachable" flag.
487 */
488 if (!default_refs) {
8eb2d0be 489 fprintf(stderr, "notice: No default references\n");
071fa89e
LT
490 show_unreachable = 0;
491 }
1024932f
LT
492}
493
76c1d9a0 494static struct object *parse_loose_object(const struct object_id *oid,
c68b489e
JK
495 const char *path)
496{
497 struct object *obj;
498 void *contents;
499 enum object_type type;
500 unsigned long size;
501 int eaten;
502
76c1d9a0 503 if (read_loose_object(path, oid->hash, &type, &size, &contents) < 0)
c68b489e
JK
504 return NULL;
505
506 if (!contents && type != OBJ_BLOB)
507 die("BUG: read_loose_object streamed a non-blob");
508
c251c83d 509 obj = parse_object_buffer(oid, type, size, contents, &eaten);
c68b489e
JK
510
511 if (!eaten)
512 free(contents);
513 return obj;
514}
515
76c1d9a0 516static int fsck_loose(const struct object_id *oid, const char *path, void *data)
f0766bf9 517{
76c1d9a0 518 struct object *obj = parse_loose_object(oid, path);
c68b489e
JK
519
520 if (!obj) {
521 errors_found |= ERROR_OBJECT;
522 error("%s: object corrupt or missing: %s",
76c1d9a0 523 oid_to_hex(oid), path);
c68b489e
JK
524 return 0; /* keep checking other objects */
525 }
526
527 obj->flags = HAS_OBJ;
528 if (fsck_obj(obj))
f0766bf9
JK
529 errors_found |= ERROR_OBJECT;
530 return 0;
531}
532
533static int fsck_cruft(const char *basename, const char *path, void *data)
534{
535 if (!starts_with(basename, "tmp_obj_"))
536 fprintf(stderr, "bad sha1 file: %s\n", path);
537 return 0;
538}
539
540static int fsck_subdir(int nr, const char *path, void *progress)
541{
542 display_progress(progress, nr + 1);
543 return 0;
544}
545
8a498a05
JH
546static void fsck_object_dir(const char *path)
547{
1e49f22f 548 struct progress *progress = NULL;
20f1eb6b
JS
549
550 if (verbose)
551 fprintf(stderr, "Checking object directory\n");
552
1e49f22f 553 if (show_progress)
754dbc43 554 progress = start_progress(_("Checking object directories"), 256);
f0766bf9
JK
555
556 for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
557 progress);
558 display_progress(progress, 256);
1e49f22f 559 stop_progress(&progress);
8a498a05
JH
560}
561
c3330383
LT
562static int fsck_head_link(void)
563{
8eb2d0be 564 int null_is_error = 0;
8eb2d0be 565
20f1eb6b
JS
566 if (verbose)
567 fprintf(stderr, "Checking HEAD link\n");
568
95ae2c74 569 head_points_at = resolve_ref_unsafe("HEAD", 0, head_oid.hash, NULL);
122f76f5
JH
570 if (!head_points_at) {
571 errors_found |= ERROR_REFS;
8eb2d0be 572 return error("Invalid HEAD");
122f76f5 573 }
8eb2d0be
JH
574 if (!strcmp(head_points_at, "HEAD"))
575 /* detached HEAD */
576 null_is_error = 1;
122f76f5
JH
577 else if (!starts_with(head_points_at, "refs/heads/")) {
578 errors_found |= ERROR_REFS;
8098a178 579 return error("HEAD points to something strange (%s)",
5b10b091 580 head_points_at);
122f76f5 581 }
635b99a0 582 if (is_null_oid(&head_oid)) {
122f76f5
JH
583 if (null_is_error) {
584 errors_found |= ERROR_REFS;
8eb2d0be 585 return error("HEAD: detached HEAD points at nothing");
122f76f5 586 }
8eb2d0be
JH
587 fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
588 head_points_at + 11);
589 }
c3330383
LT
590 return 0;
591}
592
53dc3f3e
JH
593static int fsck_cache_tree(struct cache_tree *it)
594{
595 int i;
596 int err = 0;
597
20f1eb6b
JS
598 if (verbose)
599 fprintf(stderr, "Checking cache tree\n");
600
53dc3f3e 601 if (0 <= it->entry_count) {
c251c83d 602 struct object *obj = parse_object(&it->oid);
6d60bbef
JH
603 if (!obj) {
604 error("%s: invalid sha1 pointer in cache-tree",
e0a92804 605 oid_to_hex(&it->oid));
122f76f5 606 errors_found |= ERROR_REFS;
6d60bbef
JH
607 return 1;
608 }
cdc08b33 609 obj->used = 1;
90cf590f
JS
610 if (name_objects)
611 add_decoration(fsck_walk_options.object_names,
612 obj, xstrdup(":"));
a1cdc251 613 mark_object_reachable(obj);
1974632c 614 if (obj->type != OBJ_TREE)
53dc3f3e
JH
615 err |= objerror(obj, "non-tree in cache-tree");
616 }
617 for (i = 0; i < it->subtree_nr; i++)
618 err |= fsck_cache_tree(it->down[i]->cache_tree);
619 return err;
620}
621
76c1d9a0 622static void mark_object_for_connectivity(const struct object_id *oid)
3e3f8bd6 623{
76c1d9a0 624 struct object *obj = lookup_unknown_object(oid->hash);
3e3f8bd6
JK
625 obj->flags |= HAS_OBJ;
626}
627
76c1d9a0 628static int mark_loose_for_connectivity(const struct object_id *oid,
3e3f8bd6
JK
629 const char *path,
630 void *data)
631{
76c1d9a0 632 mark_object_for_connectivity(oid);
3e3f8bd6
JK
633 return 0;
634}
635
76c1d9a0 636static int mark_packed_for_connectivity(const struct object_id *oid,
3e3f8bd6
JK
637 struct packed_git *pack,
638 uint32_t pos,
639 void *data)
640{
76c1d9a0 641 mark_object_for_connectivity(oid);
3e3f8bd6
JK
642 return 0;
643}
644
5ac0a206 645static char const * const fsck_usage[] = {
9c9b4f2f 646 N_("git fsck [<options>] [<object>...]"),
5ac0a206
PH
647 NULL
648};
649
650static struct option fsck_opts[] = {
cf8fe315 651 OPT__VERBOSE(&verbose, N_("be verbose")),
d5d09d47 652 OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
cf8fe315 653 OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
d5d09d47
SB
654 OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
655 OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
656 OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
657 OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
658 OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
02976bf8 659 OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
d5d09d47
SB
660 OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
661 OPT_BOOL(0, "lost-found", &write_lost_and_found,
cf8fe315
NTND
662 N_("write dangling objects in .git/lost-found")),
663 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
90cf590f 664 OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
5ac0a206
PH
665 OPT_END(),
666};
e2b4f635 667
baffc0e7 668int cmd_fsck(int argc, const char **argv, const char *prefix)
20222118 669{
bcee6fd8 670 int i, heads;
e15ef669 671 struct alternate_object_database *alt;
20222118 672
e2b4f635 673 errors_found = 0;
afc711b8 674 check_replace_refs = 0;
61e2b015 675
37782920 676 argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
1e49f22f 677
22410549
JS
678 fsck_walk_options.walk = mark_object;
679 fsck_obj_options.walk = mark_used;
680 fsck_obj_options.error_func = fsck_error_func;
681 if (check_strict)
682 fsck_obj_options.strict = 1;
683
1e49f22f
NTND
684 if (show_progress == -1)
685 show_progress = isatty(2);
686 if (verbose)
687 show_progress = 0;
688
5ac0a206
PH
689 if (write_lost_and_found) {
690 check_full = 1;
691 include_reflogs = 0;
889262ea
LT
692 }
693
90cf590f
JS
694 if (name_objects)
695 fsck_walk_options.object_names =
696 xcalloc(1, sizeof(struct decoration));
697
2becf00f
JS
698 git_config(fsck_config, NULL);
699
c3330383 700 fsck_head_link();
3e3f8bd6
JK
701 if (connectivity_only) {
702 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
703 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
704 } else {
02976bf8 705 fsck_object_dir(get_object_directory());
e15ef669 706
fbe85e73 707 prepare_alt_odb();
597f9134
JK
708 for (alt = alt_odb_list; alt; alt = alt->next)
709 fsck_object_dir(alt->path);
e15ef669 710
3e3f8bd6
JK
711 if (check_full) {
712 struct packed_git *p;
713 uint32_t total = 0, count = 0;
714 struct progress *progress = NULL;
e15ef669 715
3e3f8bd6 716 prepare_packed_git();
1e49f22f 717
3e3f8bd6
JK
718 if (show_progress) {
719 for (p = packed_git; p; p = p->next) {
720 if (open_pack_index(p))
721 continue;
722 total += p->num_objects;
723 }
1e49f22f 724
3e3f8bd6
JK
725 progress = start_progress(_("Checking objects"), total);
726 }
1e49f22f 727 for (p = packed_git; p; p = p->next) {
3e3f8bd6
JK
728 /* verify gives error messages itself */
729 if (verify_pack(p, fsck_obj_buffer,
730 progress, count))
731 errors_found |= ERROR_PACK;
732 count += p->num_objects;
1e49f22f 733 }
3e3f8bd6 734 stop_progress(&progress);
1e49f22f 735 }
bcee6fd8
LT
736 }
737
738 heads = 0;
3aed2fda 739 for (i = 0; i < argc; i++) {
a6080a0a 740 const char *arg = argv[i];
469e2ebf
JH
741 unsigned char sha1[20];
742 if (!get_sha1(arg, sha1)) {
743 struct object *obj = lookup_object(sha1);
e1a1388d 744
c2d17b3b 745 if (!obj || !(obj->flags & HAS_OBJ)) {
c6c7b16d
JK
746 error("%s: object missing", sha1_to_hex(sha1));
747 errors_found |= ERROR_OBJECT;
e1a1388d 748 continue;
c6c7b16d 749 }
e1a1388d 750
ff5ebe39 751 obj->used = 1;
90cf590f
JS
752 if (name_objects)
753 add_decoration(fsck_walk_options.object_names,
754 obj, xstrdup(arg));
271b8d25 755 mark_object_reachable(obj);
bcee6fd8 756 heads++;
d9839e03
LT
757 continue;
758 }
f1f0d088 759 error("invalid parameter: expected sha1, got '%s'", arg);
c6c7b16d 760 errors_found |= ERROR_OBJECT;
d9839e03 761 }
d9839e03 762
1024932f 763 /*
d1af002d 764 * If we've not been given any explicit head information, do the
e7bd907d
LT
765 * default ones from .git/refs. We also consider the index file
766 * in this case (ie this implies --cache).
1024932f 767 */
c3271a0e 768 if (!argc) {
1024932f
LT
769 get_default_heads();
770 keep_cache_objects = 1;
771 }
772
ae7c0c92 773 if (keep_cache_objects) {
a33fc72f 774 verify_index_checksum = 1;
ae7c0c92
JH
775 read_cache();
776 for (i = 0; i < active_nr; i++) {
8d9721c8
LT
777 unsigned int mode;
778 struct blob *blob;
ae7c0c92 779 struct object *obj;
8d9721c8 780
7a51ed66 781 mode = active_cache[i]->ce_mode;
302b9282 782 if (S_ISGITLINK(mode))
8d9721c8 783 continue;
3aca1fc6 784 blob = lookup_blob(&active_cache[i]->oid);
ae7c0c92
JH
785 if (!blob)
786 continue;
787 obj = &blob->object;
788 obj->used = 1;
90cf590f
JS
789 if (name_objects)
790 add_decoration(fsck_walk_options.object_names,
791 obj,
792 xstrfmt(":%s", active_cache[i]->name));
271b8d25 793 mark_object_reachable(obj);
ae7c0c92 794 }
53dc3f3e
JH
795 if (active_cache_tree)
796 fsck_cache_tree(active_cache_tree);
ae7c0c92
JH
797 }
798
8ba0bbb2 799 check_connectivity();
e2b4f635 800 return errors_found;
20222118 801}