1#include "builtin.h"
2#include "cache.h"
3#include "repository.h"
4#include "config.h"
5#include "commit.h"
6#include "tree.h"
7#include "blob.h"
8#include "tag.h"
9#include "refs.h"
10#include "pack.h"
11#include "cache-tree.h"
12#include "tree-walk.h"
13#include "fsck.h"
14#include "parse-options.h"
15#include "dir.h"
16#include "progress.h"
17#include "streaming.h"
18#include "decorate.h"
19#include "packfile.h"
20#include "object-store.h"
21#include "run-command.h"
22
23#define REACHABLE 0x0001
24#define SEEN 0x0002
25#define HAS_OBJ 0x0004
26/* This flag is set if something points to this object. */
27#define USED 0x0008
28
29static int show_root;
30static int show_tags;
31static int show_unreachable;
32static int include_reflogs = 1;
33static int check_full = 1;
34static int connectivity_only;
35static int check_strict;
36static int keep_cache_objects;
37static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
38static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
39static struct object_id head_oid;
40static const char *head_points_at;
41static int errors_found;
42static int write_lost_and_found;
43static int verbose;
44static int show_progress = -1;
45static int show_dangling = 1;
46static int name_objects;
47#define ERROR_OBJECT 01
48#define ERROR_REACHABLE 02
49#define ERROR_PACK 04
50#define ERROR_REFS 010
51#define ERROR_COMMIT_GRAPH 020
52
53static const char *describe_object(struct object *obj)
54{
55 static struct strbuf buf = STRBUF_INIT;
56 char *name = name_objects ?
57 lookup_decoration(fsck_walk_options.object_names, obj) : NULL;
58
59 strbuf_reset(&buf);
60 strbuf_addstr(&buf, oid_to_hex(&obj->oid));
61 if (name)
62 strbuf_addf(&buf, " (%s)", name);
63
64 return buf.buf;
65}
66
67static const char *printable_type(struct object *obj)
68{
69 const char *ret;
70
71 if (obj->type == OBJ_NONE) {
72 enum object_type type = oid_object_info(the_repository,
73 &obj->oid, NULL);
74 if (type > 0)
75 object_as_type(obj, type, 0);
76 }
77
78 ret = type_name(obj->type);
79 if (!ret)
80 ret = "unknown";
81
82 return ret;
83}
84
85static int fsck_config(const char *var, const char *value, void *cb)
86{
87 if (strcmp(var, "fsck.skiplist") == 0) {
88 const char *path;
89 struct strbuf sb = STRBUF_INIT;
90
91 if (git_config_pathname(&path, var, value))
92 return 1;
93 strbuf_addf(&sb, "skiplist=%s", path);
94 free((char *)path);
95 fsck_set_msg_types(&fsck_obj_options, sb.buf);
96 strbuf_release(&sb);
97 return 0;
98 }
99
100 if (skip_prefix(var, "fsck.", &var)) {
101 fsck_set_msg_type(&fsck_obj_options, var, value);
102 return 0;
103 }
104
105 return git_default_config(var, value, cb);
106}
107
108static void objreport(struct object *obj, const char *msg_type,
109 const char *err)
110{
111 fprintf(stderr, "%s in %s %s: %s\n",
112 msg_type, printable_type(obj), describe_object(obj), err);
113}
114
115static int objerror(struct object *obj, const char *err)
116{
117 errors_found |= ERROR_OBJECT;
118 objreport(obj, "error", err);
119 return -1;
120}
121
122static int fsck_error_func(struct fsck_options *o,
123 struct object *obj, int type, const char *message)
124{
125 objreport(obj, (type == FSCK_WARN) ? "warning" : "error", message);
126 return (type == FSCK_WARN) ? 0 : 1;
127}
128
129static struct object_array pending;
130
131static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
132{
133 struct object *parent = data;
134
135 /*
136 * The only case data is NULL or type is OBJ_ANY is when
137 * mark_object_reachable() calls us. All the callers of
138 * that function has non-NULL obj hence ...
139 */
140 if (!obj) {
141 /* ... these references to parent->fld are safe here */
142 printf("broken link from %7s %s\n",
143 printable_type(parent), describe_object(parent));
144 printf("broken link from %7s %s\n",
145 (type == OBJ_ANY ? "unknown" : type_name(type)), "unknown");
146 errors_found |= ERROR_REACHABLE;
147 return 1;
148 }
149
150 if (type != OBJ_ANY && obj->type != type)
151 /* ... and the reference to parent is safe here */
152 objerror(parent, "wrong object type in link");
153
154 if (obj->flags & REACHABLE)
155 return 0;
156 obj->flags |= REACHABLE;
157
158 if (is_promisor_object(&obj->oid))
159 /*
160 * Further recursion does not need to be performed on this
161 * object since it is a promisor object (so it does not need to
162 * be added to "pending").
163 */
164 return 0;
165
166 if (!(obj->flags & HAS_OBJ)) {
167 if (parent && !has_object_file(&obj->oid)) {
168 printf("broken link from %7s %s\n",
169 printable_type(parent), describe_object(parent));
170 printf(" to %7s %s\n",
171 printable_type(obj), describe_object(obj));
172 errors_found |= ERROR_REACHABLE;
173 }
174 return 1;
175 }
176
177 add_object_array(obj, NULL, &pending);
178 return 0;
179}
180
181static void mark_object_reachable(struct object *obj)
182{
183 mark_object(obj, OBJ_ANY, NULL, NULL);
184}
185
186static int traverse_one_object(struct object *obj)
187{
188 int result = fsck_walk(obj, obj, &fsck_walk_options);
189
190 if (obj->type == OBJ_TREE) {
191 struct tree *tree = (struct tree *)obj;
192 free_tree_buffer(tree);
193 }
194 return result;
195}
196
197static int traverse_reachable(void)
198{
199 struct progress *progress = NULL;
200 unsigned int nr = 0;
201 int result = 0;
202 if (show_progress)
203 progress = start_delayed_progress(_("Checking connectivity"), 0);
204 while (pending.nr) {
205 result |= traverse_one_object(object_array_pop(&pending));
206 display_progress(progress, ++nr);
207 }
208 stop_progress(&progress);
209 return !!result;
210}
211
212static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
213{
214 if (!obj)
215 return 1;
216 obj->flags |= USED;
217 return 0;
218}
219
220/*
221 * Check a single reachable object
222 */
223static void check_reachable_object(struct object *obj)
224{
225 /*
226 * We obviously want the object to be parsed,
227 * except if it was in a pack-file and we didn't
228 * do a full fsck
229 */
230 if (!(obj->flags & HAS_OBJ)) {
231 if (is_promisor_object(&obj->oid))
232 return;
233 if (has_object_pack(&obj->oid))
234 return; /* it is in pack - forget about it */
235 printf("missing %s %s\n", printable_type(obj),
236 describe_object(obj));
237 errors_found |= ERROR_REACHABLE;
238 return;
239 }
240}
241
242/*
243 * Check a single unreachable object
244 */
245static void check_unreachable_object(struct object *obj)
246{
247 /*
248 * Missing unreachable object? Ignore it. It's not like
249 * we miss it (since it can't be reached), nor do we want
250 * to complain about it being unreachable (since it does
251 * not exist).
252 */
253 if (!(obj->flags & HAS_OBJ))
254 return;
255
256 /*
257 * Unreachable object that exists? Show it if asked to,
258 * since this is something that is prunable.
259 */
260 if (show_unreachable) {
261 printf("unreachable %s %s\n", printable_type(obj),
262 describe_object(obj));
263 return;
264 }
265
266 /*
267 * "!USED" means that nothing at all points to it, including
268 * other unreachable objects. In other words, it's the "tip"
269 * of some set of unreachable objects, usually a commit that
270 * got dropped.
271 *
272 * Such starting points are more interesting than some random
273 * set of unreachable objects, so we show them even if the user
274 * hasn't asked for _all_ unreachable objects. If you have
275 * deleted a branch by mistake, this is a prime candidate to
276 * start looking at, for example.
277 */
278 if (!(obj->flags & USED)) {
279 if (show_dangling)
280 printf("dangling %s %s\n", printable_type(obj),
281 describe_object(obj));
282 if (write_lost_and_found) {
283 char *filename = git_pathdup("lost-found/%s/%s",
284 obj->type == OBJ_COMMIT ? "commit" : "other",
285 describe_object(obj));
286 FILE *f;
287
288 if (safe_create_leading_directories_const(filename)) {
289 error("Could not create lost-found");
290 free(filename);
291 return;
292 }
293 f = xfopen(filename, "w");
294 if (obj->type == OBJ_BLOB) {
295 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
296 die_errno("Could not write '%s'", filename);
297 } else
298 fprintf(f, "%s\n", describe_object(obj));
299 if (fclose(f))
300 die_errno("Could not finish '%s'",
301 filename);
302 free(filename);
303 }
304 return;
305 }
306
307 /*
308 * Otherwise? It's there, it's unreachable, and some other unreachable
309 * object points to it. Ignore it - it's not interesting, and we showed
310 * all the interesting cases above.
311 */
312}
313
314static void check_object(struct object *obj)
315{
316 if (verbose)
317 fprintf(stderr, "Checking %s\n", describe_object(obj));
318
319 if (obj->flags & REACHABLE)
320 check_reachable_object(obj);
321 else
322 check_unreachable_object(obj);
323}
324
325static void check_connectivity(void)
326{
327 int i, max;
328
329 /* Traverse the pending reachable objects */
330 traverse_reachable();
331
332 /* Look up all the requirements, warn about missing objects.. */
333 max = get_max_object_index();
334 if (verbose)
335 fprintf(stderr, "Checking connectivity (%d objects)\n", max);
336
337 for (i = 0; i < max; i++) {
338 struct object *obj = get_indexed_object(i);
339
340 if (obj)
341 check_object(obj);
342 }
343}
344
345static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
346{
347 int err;
348
349 if (obj->flags & SEEN)
350 return 0;
351 obj->flags |= SEEN;
352
353 if (verbose)
354 fprintf(stderr, "Checking %s %s\n",
355 printable_type(obj), describe_object(obj));
356
357 if (fsck_walk(obj, NULL, &fsck_obj_options))
358 objerror(obj, "broken links");
359 err = fsck_object(obj, buffer, size, &fsck_obj_options);
360 if (err)
361 goto out;
362
363 if (obj->type == OBJ_COMMIT) {
364 struct commit *commit = (struct commit *) obj;
365
366 if (!commit->parents && show_root)
367 printf("root %s\n", describe_object(&commit->object));
368 }
369
370 if (obj->type == OBJ_TAG) {
371 struct tag *tag = (struct tag *) obj;
372
373 if (show_tags && tag->tagged) {
374 printf("tagged %s %s", printable_type(tag->tagged),
375 describe_object(tag->tagged));
376 printf(" (%s) in %s\n", tag->tag,
377 describe_object(&tag->object));
378 }
379 }
380
381out:
382 if (obj->type == OBJ_TREE)
383 free_tree_buffer((struct tree *)obj);
384 if (obj->type == OBJ_COMMIT)
385 free_commit_buffer((struct commit *)obj);
386 return err;
387}
388
389static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
390 unsigned long size, void *buffer, int *eaten)
391{
392 /*
393 * Note, buffer may be NULL if type is OBJ_BLOB. See
394 * verify_packfile(), data_valid variable for details.
395 */
396 struct object *obj;
397 obj = parse_object_buffer(oid, type, size, buffer, eaten);
398 if (!obj) {
399 errors_found |= ERROR_OBJECT;
400 return error("%s: object corrupt or missing", oid_to_hex(oid));
401 }
402 obj->flags &= ~(REACHABLE | SEEN);
403 obj->flags |= HAS_OBJ;
404 return fsck_obj(obj, buffer, size);
405}
406
407static int default_refs;
408
409static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
410 timestamp_t timestamp)
411{
412 struct object *obj;
413
414 if (!is_null_oid(oid)) {
415 obj = lookup_object(oid->hash);
416 if (obj && (obj->flags & HAS_OBJ)) {
417 if (timestamp && name_objects)
418 add_decoration(fsck_walk_options.object_names,
419 obj,
420 xstrfmt("%s@{%"PRItime"}", refname, timestamp));
421 obj->flags |= USED;
422 mark_object_reachable(obj);
423 } else if (!is_promisor_object(oid)) {
424 error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
425 errors_found |= ERROR_REACHABLE;
426 }
427 }
428}
429
430static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
431 const char *email, timestamp_t timestamp, int tz,
432 const char *message, void *cb_data)
433{
434 const char *refname = cb_data;
435
436 if (verbose)
437 fprintf(stderr, "Checking reflog %s->%s\n",
438 oid_to_hex(ooid), oid_to_hex(noid));
439
440 fsck_handle_reflog_oid(refname, ooid, 0);
441 fsck_handle_reflog_oid(refname, noid, timestamp);
442 return 0;
443}
444
445static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
446 int flag, void *cb_data)
447{
448 for_each_reflog_ent(logname, fsck_handle_reflog_ent, (void *)logname);
449 return 0;
450}
451
452static int fsck_handle_ref(const char *refname, const struct object_id *oid,
453 int flag, void *cb_data)
454{
455 struct object *obj;
456
457 obj = parse_object(oid);
458 if (!obj) {
459 if (is_promisor_object(oid)) {
460 /*
461 * Increment default_refs anyway, because this is a
462 * valid ref.
463 */
464 default_refs++;
465 return 0;
466 }
467 error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
468 errors_found |= ERROR_REACHABLE;
469 /* We'll continue with the rest despite the error.. */
470 return 0;
471 }
472 if (obj->type != OBJ_COMMIT && is_branch(refname)) {
473 error("%s: not a commit", refname);
474 errors_found |= ERROR_REFS;
475 }
476 default_refs++;
477 obj->flags |= USED;
478 if (name_objects)
479 add_decoration(fsck_walk_options.object_names,
480 obj, xstrdup(refname));
481 mark_object_reachable(obj);
482
483 return 0;
484}
485
486static void get_default_heads(void)
487{
488 if (head_points_at && !is_null_oid(&head_oid))
489 fsck_handle_ref("HEAD", &head_oid, 0, NULL);
490 for_each_rawref(fsck_handle_ref, NULL);
491 if (include_reflogs)
492 for_each_reflog(fsck_handle_reflog, NULL);
493
494 /*
495 * Not having any default heads isn't really fatal, but
496 * it does mean that "--unreachable" no longer makes any
497 * sense (since in this case everything will obviously
498 * be unreachable by definition.
499 *
500 * Showing dangling objects is valid, though (as those
501 * dangling objects are likely lost heads).
502 *
503 * So we just print a warning about it, and clear the
504 * "show_unreachable" flag.
505 */
506 if (!default_refs) {
507 fprintf(stderr, "notice: No default references\n");
508 show_unreachable = 0;
509 }
510}
511
512static int fsck_loose(const struct object_id *oid, const char *path, void *data)
513{
514 struct object *obj;
515 enum object_type type;
516 unsigned long size;
517 void *contents;
518 int eaten;
519
520 if (read_loose_object(path, oid, &type, &size, &contents) < 0) {
521 errors_found |= ERROR_OBJECT;
522 error("%s: object corrupt or missing: %s",
523 oid_to_hex(oid), path);
524 return 0; /* keep checking other objects */
525 }
526
527 if (!contents && type != OBJ_BLOB)
528 BUG("read_loose_object streamed a non-blob");
529
530 obj = parse_object_buffer(oid, type, size, contents, &eaten);
531 if (!obj) {
532 errors_found |= ERROR_OBJECT;
533 error("%s: object could not be parsed: %s",
534 oid_to_hex(oid), path);
535 if (!eaten)
536 free(contents);
537 return 0; /* keep checking other objects */
538 }
539
540 obj->flags &= ~(REACHABLE | SEEN);
541 obj->flags |= HAS_OBJ;
542 if (fsck_obj(obj, contents, size))
543 errors_found |= ERROR_OBJECT;
544
545 if (!eaten)
546 free(contents);
547 return 0; /* keep checking other objects, even if we saw an error */
548}
549
550static int fsck_cruft(const char *basename, const char *path, void *data)
551{
552 if (!starts_with(basename, "tmp_obj_"))
553 fprintf(stderr, "bad sha1 file: %s\n", path);
554 return 0;
555}
556
557static int fsck_subdir(unsigned int nr, const char *path, void *progress)
558{
559 display_progress(progress, nr + 1);
560 return 0;
561}
562
563static void fsck_object_dir(const char *path)
564{
565 struct progress *progress = NULL;
566
567 if (verbose)
568 fprintf(stderr, "Checking object directory\n");
569
570 if (show_progress)
571 progress = start_progress(_("Checking object directories"), 256);
572
573 for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
574 progress);
575 display_progress(progress, 256);
576 stop_progress(&progress);
577}
578
579static int fsck_head_link(void)
580{
581 int null_is_error = 0;
582
583 if (verbose)
584 fprintf(stderr, "Checking HEAD link\n");
585
586 head_points_at = resolve_ref_unsafe("HEAD", 0, &head_oid, NULL);
587 if (!head_points_at) {
588 errors_found |= ERROR_REFS;
589 return error("Invalid HEAD");
590 }
591 if (!strcmp(head_points_at, "HEAD"))
592 /* detached HEAD */
593 null_is_error = 1;
594 else if (!starts_with(head_points_at, "refs/heads/")) {
595 errors_found |= ERROR_REFS;
596 return error("HEAD points to something strange (%s)",
597 head_points_at);
598 }
599 if (is_null_oid(&head_oid)) {
600 if (null_is_error) {
601 errors_found |= ERROR_REFS;
602 return error("HEAD: detached HEAD points at nothing");
603 }
604 fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
605 head_points_at + 11);
606 }
607 return 0;
608}
609
610static int fsck_cache_tree(struct cache_tree *it)
611{
612 int i;
613 int err = 0;
614
615 if (verbose)
616 fprintf(stderr, "Checking cache tree\n");
617
618 if (0 <= it->entry_count) {
619 struct object *obj = parse_object(&it->oid);
620 if (!obj) {
621 error("%s: invalid sha1 pointer in cache-tree",
622 oid_to_hex(&it->oid));
623 errors_found |= ERROR_REFS;
624 return 1;
625 }
626 obj->flags |= USED;
627 if (name_objects)
628 add_decoration(fsck_walk_options.object_names,
629 obj, xstrdup(":"));
630 mark_object_reachable(obj);
631 if (obj->type != OBJ_TREE)
632 err |= objerror(obj, "non-tree in cache-tree");
633 }
634 for (i = 0; i < it->subtree_nr; i++)
635 err |= fsck_cache_tree(it->down[i]->cache_tree);
636 return err;
637}
638
639static void mark_object_for_connectivity(const struct object_id *oid)
640{
641 struct object *obj = lookup_unknown_object(oid->hash);
642 obj->flags |= HAS_OBJ;
643}
644
645static int mark_loose_for_connectivity(const struct object_id *oid,
646 const char *path,
647 void *data)
648{
649 mark_object_for_connectivity(oid);
650 return 0;
651}
652
653static int mark_packed_for_connectivity(const struct object_id *oid,
654 struct packed_git *pack,
655 uint32_t pos,
656 void *data)
657{
658 mark_object_for_connectivity(oid);
659 return 0;
660}
661
662static char const * const fsck_usage[] = {
663 N_("git fsck [<options>] [<object>...]"),
664 NULL
665};
666
667static struct option fsck_opts[] = {
668 OPT__VERBOSE(&verbose, N_("be verbose")),
669 OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
670 OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
671 OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
672 OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
673 OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
674 OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
675 OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
676 OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
677 OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
678 OPT_BOOL(0, "lost-found", &write_lost_and_found,
679 N_("write dangling objects in .git/lost-found")),
680 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
681 OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
682 OPT_END(),
683};
684
685int cmd_fsck(int argc, const char **argv, const char *prefix)
686{
687 int i;
688 struct alternate_object_database *alt;
689
690 /* fsck knows how to handle missing promisor objects */
691 fetch_if_missing = 0;
692
693 errors_found = 0;
694 check_replace_refs = 0;
695
696 argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
697
698 fsck_walk_options.walk = mark_object;
699 fsck_obj_options.walk = mark_used;
700 fsck_obj_options.error_func = fsck_error_func;
701 if (check_strict)
702 fsck_obj_options.strict = 1;
703
704 if (show_progress == -1)
705 show_progress = isatty(2);
706 if (verbose)
707 show_progress = 0;
708
709 if (write_lost_and_found) {
710 check_full = 1;
711 include_reflogs = 0;
712 }
713
714 if (name_objects)
715 fsck_walk_options.object_names =
716 xcalloc(1, sizeof(struct decoration));
717
718 git_config(fsck_config, NULL);
719
720 fsck_head_link();
721 if (connectivity_only) {
722 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
723 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
724 } else {
725 struct alternate_object_database *alt_odb_list;
726
727 fsck_object_dir(get_object_directory());
728
729 prepare_alt_odb(the_repository);
730 alt_odb_list = the_repository->objects->alt_odb_list;
731 for (alt = alt_odb_list; alt; alt = alt->next)
732 fsck_object_dir(alt->path);
733
734 if (check_full) {
735 struct packed_git *p;
736 uint32_t total = 0, count = 0;
737 struct progress *progress = NULL;
738
739 if (show_progress) {
740 for (p = get_packed_git(the_repository); p;
741 p = p->next) {
742 if (open_pack_index(p))
743 continue;
744 total += p->num_objects;
745 }
746
747 progress = start_progress(_("Checking objects"), total);
748 }
749 for (p = get_packed_git(the_repository); p;
750 p = p->next) {
751 /* verify gives error messages itself */
752 if (verify_pack(p, fsck_obj_buffer,
753 progress, count))
754 errors_found |= ERROR_PACK;
755 count += p->num_objects;
756 }
757 stop_progress(&progress);
758 }
759
760 if (fsck_finish(&fsck_obj_options))
761 errors_found |= ERROR_OBJECT;
762 }
763
764 for (i = 0; i < argc; i++) {
765 const char *arg = argv[i];
766 struct object_id oid;
767 if (!get_oid(arg, &oid)) {
768 struct object *obj = lookup_object(oid.hash);
769
770 if (!obj || !(obj->flags & HAS_OBJ)) {
771 if (is_promisor_object(&oid))
772 continue;
773 error("%s: object missing", oid_to_hex(&oid));
774 errors_found |= ERROR_OBJECT;
775 continue;
776 }
777
778 obj->flags |= USED;
779 if (name_objects)
780 add_decoration(fsck_walk_options.object_names,
781 obj, xstrdup(arg));
782 mark_object_reachable(obj);
783 continue;
784 }
785 error("invalid parameter: expected sha1, got '%s'", arg);
786 errors_found |= ERROR_OBJECT;
787 }
788
789 /*
790 * If we've not been given any explicit head information, do the
791 * default ones from .git/refs. We also consider the index file
792 * in this case (ie this implies --cache).
793 */
794 if (!argc) {
795 get_default_heads();
796 keep_cache_objects = 1;
797 }
798
799 if (keep_cache_objects) {
800 verify_index_checksum = 1;
801 verify_ce_order = 1;
802 read_cache();
803 for (i = 0; i < active_nr; i++) {
804 unsigned int mode;
805 struct blob *blob;
806 struct object *obj;
807
808 mode = active_cache[i]->ce_mode;
809 if (S_ISGITLINK(mode))
810 continue;
811 blob = lookup_blob(&active_cache[i]->oid);
812 if (!blob)
813 continue;
814 obj = &blob->object;
815 obj->flags |= USED;
816 if (name_objects)
817 add_decoration(fsck_walk_options.object_names,
818 obj,
819 xstrfmt(":%s", active_cache[i]->name));
820 mark_object_reachable(obj);
821 }
822 if (active_cache_tree)
823 fsck_cache_tree(active_cache_tree);
824 }
825
826 check_connectivity();
827
828 if (core_commit_graph) {
829 struct child_process commit_graph_verify = CHILD_PROCESS_INIT;
830 const char *verify_argv[] = { "commit-graph", "verify", NULL, NULL, NULL };
831
832 commit_graph_verify.argv = verify_argv;
833 commit_graph_verify.git_cmd = 1;
834 if (run_command(&commit_graph_verify))
835 errors_found |= ERROR_COMMIT_GRAPH;
836
837 prepare_alt_odb(the_repository);
838 for (alt = the_repository->objects->alt_odb_list; alt; alt = alt->next) {
839 verify_argv[2] = "--object-dir";
840 verify_argv[3] = alt->path;
841 if (run_command(&commit_graph_verify))
842 errors_found |= ERROR_COMMIT_GRAPH;
843 }
844 }
845
846 return errors_found;
847}