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[thirdparty/git.git] / builtin / fsck.c
1 #define USE_THE_INDEX_COMPATIBILITY_MACROS
2 #include "builtin.h"
3 #include "cache.h"
4 #include "repository.h"
5 #include "config.h"
6 #include "commit.h"
7 #include "tree.h"
8 #include "blob.h"
9 #include "tag.h"
10 #include "refs.h"
11 #include "pack.h"
12 #include "cache-tree.h"
13 #include "tree-walk.h"
14 #include "fsck.h"
15 #include "parse-options.h"
16 #include "dir.h"
17 #include "progress.h"
18 #include "streaming.h"
19 #include "decorate.h"
20 #include "packfile.h"
21 #include "object-store.h"
22 #include "run-command.h"
23 #include "worktree.h"
24
25 #define REACHABLE 0x0001
26 #define SEEN 0x0002
27 #define HAS_OBJ 0x0004
28 /* This flag is set if something points to this object. */
29 #define USED 0x0008
30
31 static int show_root;
32 static int show_tags;
33 static int show_unreachable;
34 static int include_reflogs = 1;
35 static int check_full = 1;
36 static int connectivity_only;
37 static int check_strict;
38 static int keep_cache_objects;
39 static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
40 static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
41 static int errors_found;
42 static int write_lost_and_found;
43 static int verbose;
44 static int show_progress = -1;
45 static int show_dangling = 1;
46 static 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 #define ERROR_MULTI_PACK_INDEX 040
53
54 static const char *describe_object(const struct object_id *oid)
55 {
56 return fsck_describe_object(&fsck_walk_options, oid);
57 }
58
59 static const char *printable_type(const struct object_id *oid,
60 enum object_type type)
61 {
62 const char *ret;
63
64 if (type == OBJ_NONE)
65 type = oid_object_info(the_repository, oid, NULL);
66
67 ret = type_name(type);
68 if (!ret)
69 ret = _("unknown");
70
71 return ret;
72 }
73
74 static int fsck_config(const char *var, const char *value, void *cb)
75 {
76 if (strcmp(var, "fsck.skiplist") == 0) {
77 const char *path;
78 struct strbuf sb = STRBUF_INIT;
79
80 if (git_config_pathname(&path, var, value))
81 return 1;
82 strbuf_addf(&sb, "skiplist=%s", path);
83 free((char *)path);
84 fsck_set_msg_types(&fsck_obj_options, sb.buf);
85 strbuf_release(&sb);
86 return 0;
87 }
88
89 if (skip_prefix(var, "fsck.", &var)) {
90 fsck_set_msg_type(&fsck_obj_options, var, value);
91 return 0;
92 }
93
94 return git_default_config(var, value, cb);
95 }
96
97 static int objerror(struct object *obj, const char *err)
98 {
99 errors_found |= ERROR_OBJECT;
100 /* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
101 fprintf_ln(stderr, _("error in %s %s: %s"),
102 printable_type(&obj->oid, obj->type),
103 describe_object(&obj->oid), err);
104 return -1;
105 }
106
107 static int fsck_error_func(struct fsck_options *o,
108 const struct object_id *oid,
109 enum object_type object_type,
110 int msg_type, const char *message)
111 {
112 switch (msg_type) {
113 case FSCK_WARN:
114 /* TRANSLATORS: e.g. warning in tree 01bfda: <more explanation> */
115 fprintf_ln(stderr, _("warning in %s %s: %s"),
116 printable_type(oid, object_type),
117 describe_object(oid), message);
118 return 0;
119 case FSCK_ERROR:
120 /* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
121 fprintf_ln(stderr, _("error in %s %s: %s"),
122 printable_type(oid, object_type),
123 describe_object(oid), message);
124 return 1;
125 default:
126 BUG("%d (FSCK_IGNORE?) should never trigger this callback",
127 msg_type);
128 }
129 }
130
131 static struct object_array pending;
132
133 static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
134 {
135 struct object *parent = data;
136
137 /*
138 * The only case data is NULL or type is OBJ_ANY is when
139 * mark_object_reachable() calls us. All the callers of
140 * that function has non-NULL obj hence ...
141 */
142 if (!obj) {
143 /* ... these references to parent->fld are safe here */
144 printf_ln(_("broken link from %7s %s"),
145 printable_type(&parent->oid, parent->type),
146 describe_object(&parent->oid));
147 printf_ln(_("broken link from %7s %s"),
148 (type == OBJ_ANY ? _("unknown") : type_name(type)),
149 _("unknown"));
150 errors_found |= ERROR_REACHABLE;
151 return 1;
152 }
153
154 if (type != OBJ_ANY && obj->type != type)
155 /* ... and the reference to parent is safe here */
156 objerror(parent, _("wrong object type in link"));
157
158 if (obj->flags & REACHABLE)
159 return 0;
160 obj->flags |= REACHABLE;
161
162 if (is_promisor_object(&obj->oid))
163 /*
164 * Further recursion does not need to be performed on this
165 * object since it is a promisor object (so it does not need to
166 * be added to "pending").
167 */
168 return 0;
169
170 if (!(obj->flags & HAS_OBJ)) {
171 if (parent && !has_object(the_repository, &obj->oid, 1)) {
172 printf_ln(_("broken link from %7s %s\n"
173 " to %7s %s"),
174 printable_type(&parent->oid, parent->type),
175 describe_object(&parent->oid),
176 printable_type(&obj->oid, obj->type),
177 describe_object(&obj->oid));
178 errors_found |= ERROR_REACHABLE;
179 }
180 return 1;
181 }
182
183 add_object_array(obj, NULL, &pending);
184 return 0;
185 }
186
187 static void mark_object_reachable(struct object *obj)
188 {
189 mark_object(obj, OBJ_ANY, NULL, NULL);
190 }
191
192 static int traverse_one_object(struct object *obj)
193 {
194 int result = fsck_walk(obj, obj, &fsck_walk_options);
195
196 if (obj->type == OBJ_TREE) {
197 struct tree *tree = (struct tree *)obj;
198 free_tree_buffer(tree);
199 }
200 return result;
201 }
202
203 static int traverse_reachable(void)
204 {
205 struct progress *progress = NULL;
206 unsigned int nr = 0;
207 int result = 0;
208 if (show_progress)
209 progress = start_delayed_progress(_("Checking connectivity"), 0);
210 while (pending.nr) {
211 result |= traverse_one_object(object_array_pop(&pending));
212 display_progress(progress, ++nr);
213 }
214 stop_progress(&progress);
215 return !!result;
216 }
217
218 static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
219 {
220 if (!obj)
221 return 1;
222 obj->flags |= USED;
223 return 0;
224 }
225
226 static void mark_unreachable_referents(const struct object_id *oid)
227 {
228 struct fsck_options options = FSCK_OPTIONS_DEFAULT;
229 struct object *obj = lookup_object(the_repository, oid);
230
231 if (!obj || !(obj->flags & HAS_OBJ))
232 return; /* not part of our original set */
233 if (obj->flags & REACHABLE)
234 return; /* reachable objects already traversed */
235
236 /*
237 * Avoid passing OBJ_NONE to fsck_walk, which will parse the object
238 * (and we want to avoid parsing blobs).
239 */
240 if (obj->type == OBJ_NONE) {
241 enum object_type type = oid_object_info(the_repository,
242 &obj->oid, NULL);
243 if (type > 0)
244 object_as_type(obj, type, 0);
245 }
246
247 options.walk = mark_used;
248 fsck_walk(obj, NULL, &options);
249 }
250
251 static int mark_loose_unreachable_referents(const struct object_id *oid,
252 const char *path,
253 void *data)
254 {
255 mark_unreachable_referents(oid);
256 return 0;
257 }
258
259 static int mark_packed_unreachable_referents(const struct object_id *oid,
260 struct packed_git *pack,
261 uint32_t pos,
262 void *data)
263 {
264 mark_unreachable_referents(oid);
265 return 0;
266 }
267
268 /*
269 * Check a single reachable object
270 */
271 static void check_reachable_object(struct object *obj)
272 {
273 /*
274 * We obviously want the object to be parsed,
275 * except if it was in a pack-file and we didn't
276 * do a full fsck
277 */
278 if (!(obj->flags & HAS_OBJ)) {
279 if (is_promisor_object(&obj->oid))
280 return;
281 if (has_object_pack(&obj->oid))
282 return; /* it is in pack - forget about it */
283 printf_ln(_("missing %s %s"),
284 printable_type(&obj->oid, obj->type),
285 describe_object(&obj->oid));
286 errors_found |= ERROR_REACHABLE;
287 return;
288 }
289 }
290
291 /*
292 * Check a single unreachable object
293 */
294 static void check_unreachable_object(struct object *obj)
295 {
296 /*
297 * Missing unreachable object? Ignore it. It's not like
298 * we miss it (since it can't be reached), nor do we want
299 * to complain about it being unreachable (since it does
300 * not exist).
301 */
302 if (!(obj->flags & HAS_OBJ))
303 return;
304
305 /*
306 * Unreachable object that exists? Show it if asked to,
307 * since this is something that is prunable.
308 */
309 if (show_unreachable) {
310 printf_ln(_("unreachable %s %s"),
311 printable_type(&obj->oid, obj->type),
312 describe_object(&obj->oid));
313 return;
314 }
315
316 /*
317 * "!USED" means that nothing at all points to it, including
318 * other unreachable objects. In other words, it's the "tip"
319 * of some set of unreachable objects, usually a commit that
320 * got dropped.
321 *
322 * Such starting points are more interesting than some random
323 * set of unreachable objects, so we show them even if the user
324 * hasn't asked for _all_ unreachable objects. If you have
325 * deleted a branch by mistake, this is a prime candidate to
326 * start looking at, for example.
327 */
328 if (!(obj->flags & USED)) {
329 if (show_dangling)
330 printf_ln(_("dangling %s %s"),
331 printable_type(&obj->oid, obj->type),
332 describe_object(&obj->oid));
333 if (write_lost_and_found) {
334 char *filename = git_pathdup("lost-found/%s/%s",
335 obj->type == OBJ_COMMIT ? "commit" : "other",
336 describe_object(&obj->oid));
337 FILE *f;
338
339 if (safe_create_leading_directories_const(filename)) {
340 error(_("could not create lost-found"));
341 free(filename);
342 return;
343 }
344 f = xfopen(filename, "w");
345 if (obj->type == OBJ_BLOB) {
346 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
347 die_errno(_("could not write '%s'"), filename);
348 } else
349 fprintf(f, "%s\n", describe_object(&obj->oid));
350 if (fclose(f))
351 die_errno(_("could not finish '%s'"),
352 filename);
353 free(filename);
354 }
355 return;
356 }
357
358 /*
359 * Otherwise? It's there, it's unreachable, and some other unreachable
360 * object points to it. Ignore it - it's not interesting, and we showed
361 * all the interesting cases above.
362 */
363 }
364
365 static void check_object(struct object *obj)
366 {
367 if (verbose)
368 fprintf_ln(stderr, _("Checking %s"), describe_object(&obj->oid));
369
370 if (obj->flags & REACHABLE)
371 check_reachable_object(obj);
372 else
373 check_unreachable_object(obj);
374 }
375
376 static void check_connectivity(void)
377 {
378 int i, max;
379
380 /* Traverse the pending reachable objects */
381 traverse_reachable();
382
383 /*
384 * With --connectivity-only, we won't have actually opened and marked
385 * unreachable objects with USED. Do that now to make --dangling, etc
386 * accurate.
387 */
388 if (connectivity_only && (show_dangling || write_lost_and_found)) {
389 /*
390 * Even though we already have a "struct object" for each of
391 * these in memory, we must not iterate over the internal
392 * object hash as we do below. Our loop would potentially
393 * resize the hash, making our iteration invalid.
394 *
395 * Instead, we'll just go back to the source list of objects,
396 * and ignore any that weren't present in our earlier
397 * traversal.
398 */
399 for_each_loose_object(mark_loose_unreachable_referents, NULL, 0);
400 for_each_packed_object(mark_packed_unreachable_referents, NULL, 0);
401 }
402
403 /* Look up all the requirements, warn about missing objects.. */
404 max = get_max_object_index();
405 if (verbose)
406 fprintf_ln(stderr, _("Checking connectivity (%d objects)"), max);
407
408 for (i = 0; i < max; i++) {
409 struct object *obj = get_indexed_object(i);
410
411 if (obj)
412 check_object(obj);
413 }
414 }
415
416 static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
417 {
418 int err;
419
420 if (obj->flags & SEEN)
421 return 0;
422 obj->flags |= SEEN;
423
424 if (verbose)
425 fprintf_ln(stderr, _("Checking %s %s"),
426 printable_type(&obj->oid, obj->type),
427 describe_object(&obj->oid));
428
429 if (fsck_walk(obj, NULL, &fsck_obj_options))
430 objerror(obj, _("broken links"));
431 err = fsck_object(obj, buffer, size, &fsck_obj_options);
432 if (err)
433 goto out;
434
435 if (obj->type == OBJ_COMMIT) {
436 struct commit *commit = (struct commit *) obj;
437
438 if (!commit->parents && show_root)
439 printf_ln(_("root %s"),
440 describe_object(&commit->object.oid));
441 }
442
443 if (obj->type == OBJ_TAG) {
444 struct tag *tag = (struct tag *) obj;
445
446 if (show_tags && tag->tagged) {
447 printf_ln(_("tagged %s %s (%s) in %s"),
448 printable_type(&tag->tagged->oid, tag->tagged->type),
449 describe_object(&tag->tagged->oid),
450 tag->tag,
451 describe_object(&tag->object.oid));
452 }
453 }
454
455 out:
456 if (obj->type == OBJ_TREE)
457 free_tree_buffer((struct tree *)obj);
458 if (obj->type == OBJ_COMMIT)
459 free_commit_buffer(the_repository->parsed_objects,
460 (struct commit *)obj);
461 return err;
462 }
463
464 static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
465 unsigned long size, void *buffer, int *eaten)
466 {
467 /*
468 * Note, buffer may be NULL if type is OBJ_BLOB. See
469 * verify_packfile(), data_valid variable for details.
470 */
471 struct object *obj;
472 obj = parse_object_buffer(the_repository, oid, type, size, buffer,
473 eaten);
474 if (!obj) {
475 errors_found |= ERROR_OBJECT;
476 return error(_("%s: object corrupt or missing"),
477 oid_to_hex(oid));
478 }
479 obj->flags &= ~(REACHABLE | SEEN);
480 obj->flags |= HAS_OBJ;
481 return fsck_obj(obj, buffer, size);
482 }
483
484 static int default_refs;
485
486 static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
487 timestamp_t timestamp)
488 {
489 struct object *obj;
490
491 if (!is_null_oid(oid)) {
492 obj = lookup_object(the_repository, oid);
493 if (obj && (obj->flags & HAS_OBJ)) {
494 if (timestamp)
495 fsck_put_object_name(&fsck_walk_options, oid,
496 "%s@{%"PRItime"}",
497 refname, timestamp);
498 obj->flags |= USED;
499 mark_object_reachable(obj);
500 } else if (!is_promisor_object(oid)) {
501 error(_("%s: invalid reflog entry %s"),
502 refname, oid_to_hex(oid));
503 errors_found |= ERROR_REACHABLE;
504 }
505 }
506 }
507
508 static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
509 const char *email, timestamp_t timestamp, int tz,
510 const char *message, void *cb_data)
511 {
512 const char *refname = cb_data;
513
514 if (verbose)
515 fprintf_ln(stderr, _("Checking reflog %s->%s"),
516 oid_to_hex(ooid), oid_to_hex(noid));
517
518 fsck_handle_reflog_oid(refname, ooid, 0);
519 fsck_handle_reflog_oid(refname, noid, timestamp);
520 return 0;
521 }
522
523 static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
524 int flag, void *cb_data)
525 {
526 struct strbuf refname = STRBUF_INIT;
527
528 strbuf_worktree_ref(cb_data, &refname, logname);
529 for_each_reflog_ent(refname.buf, fsck_handle_reflog_ent, refname.buf);
530 strbuf_release(&refname);
531 return 0;
532 }
533
534 static int fsck_handle_ref(const char *refname, const struct object_id *oid,
535 int flag, void *cb_data)
536 {
537 struct object *obj;
538
539 obj = parse_object(the_repository, oid);
540 if (!obj) {
541 if (is_promisor_object(oid)) {
542 /*
543 * Increment default_refs anyway, because this is a
544 * valid ref.
545 */
546 default_refs++;
547 return 0;
548 }
549 error(_("%s: invalid sha1 pointer %s"),
550 refname, oid_to_hex(oid));
551 errors_found |= ERROR_REACHABLE;
552 /* We'll continue with the rest despite the error.. */
553 return 0;
554 }
555 if (obj->type != OBJ_COMMIT && is_branch(refname)) {
556 error(_("%s: not a commit"), refname);
557 errors_found |= ERROR_REFS;
558 }
559 default_refs++;
560 obj->flags |= USED;
561 fsck_put_object_name(&fsck_walk_options,
562 oid, "%s", refname);
563 mark_object_reachable(obj);
564
565 return 0;
566 }
567
568 static int fsck_head_link(const char *head_ref_name,
569 const char **head_points_at,
570 struct object_id *head_oid);
571
572 static void get_default_heads(void)
573 {
574 struct worktree **worktrees, **p;
575 const char *head_points_at;
576 struct object_id head_oid;
577
578 for_each_rawref(fsck_handle_ref, NULL);
579
580 worktrees = get_worktrees();
581 for (p = worktrees; *p; p++) {
582 struct worktree *wt = *p;
583 struct strbuf ref = STRBUF_INIT;
584
585 strbuf_worktree_ref(wt, &ref, "HEAD");
586 fsck_head_link(ref.buf, &head_points_at, &head_oid);
587 if (head_points_at && !is_null_oid(&head_oid))
588 fsck_handle_ref(ref.buf, &head_oid, 0, NULL);
589 strbuf_release(&ref);
590
591 if (include_reflogs)
592 refs_for_each_reflog(get_worktree_ref_store(wt),
593 fsck_handle_reflog, wt);
594 }
595 free_worktrees(worktrees);
596
597 /*
598 * Not having any default heads isn't really fatal, but
599 * it does mean that "--unreachable" no longer makes any
600 * sense (since in this case everything will obviously
601 * be unreachable by definition.
602 *
603 * Showing dangling objects is valid, though (as those
604 * dangling objects are likely lost heads).
605 *
606 * So we just print a warning about it, and clear the
607 * "show_unreachable" flag.
608 */
609 if (!default_refs) {
610 fprintf_ln(stderr, _("notice: No default references"));
611 show_unreachable = 0;
612 }
613 }
614
615 static int fsck_loose(const struct object_id *oid, const char *path, void *data)
616 {
617 struct object *obj;
618 enum object_type type;
619 unsigned long size;
620 void *contents;
621 int eaten;
622
623 if (read_loose_object(path, oid, &type, &size, &contents) < 0) {
624 errors_found |= ERROR_OBJECT;
625 error(_("%s: object corrupt or missing: %s"),
626 oid_to_hex(oid), path);
627 return 0; /* keep checking other objects */
628 }
629
630 if (!contents && type != OBJ_BLOB)
631 BUG("read_loose_object streamed a non-blob");
632
633 obj = parse_object_buffer(the_repository, oid, type, size,
634 contents, &eaten);
635
636 if (!obj) {
637 errors_found |= ERROR_OBJECT;
638 error(_("%s: object could not be parsed: %s"),
639 oid_to_hex(oid), path);
640 if (!eaten)
641 free(contents);
642 return 0; /* keep checking other objects */
643 }
644
645 obj->flags &= ~(REACHABLE | SEEN);
646 obj->flags |= HAS_OBJ;
647 if (fsck_obj(obj, contents, size))
648 errors_found |= ERROR_OBJECT;
649
650 if (!eaten)
651 free(contents);
652 return 0; /* keep checking other objects, even if we saw an error */
653 }
654
655 static int fsck_cruft(const char *basename, const char *path, void *data)
656 {
657 if (!starts_with(basename, "tmp_obj_"))
658 fprintf_ln(stderr, _("bad sha1 file: %s"), path);
659 return 0;
660 }
661
662 static int fsck_subdir(unsigned int nr, const char *path, void *progress)
663 {
664 display_progress(progress, nr + 1);
665 return 0;
666 }
667
668 static void fsck_object_dir(const char *path)
669 {
670 struct progress *progress = NULL;
671
672 if (verbose)
673 fprintf_ln(stderr, _("Checking object directory"));
674
675 if (show_progress)
676 progress = start_progress(_("Checking object directories"), 256);
677
678 for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
679 progress);
680 display_progress(progress, 256);
681 stop_progress(&progress);
682 }
683
684 static int fsck_head_link(const char *head_ref_name,
685 const char **head_points_at,
686 struct object_id *head_oid)
687 {
688 int null_is_error = 0;
689
690 if (verbose)
691 fprintf_ln(stderr, _("Checking %s link"), head_ref_name);
692
693 *head_points_at = resolve_ref_unsafe(head_ref_name, 0, head_oid, NULL);
694 if (!*head_points_at) {
695 errors_found |= ERROR_REFS;
696 return error(_("invalid %s"), head_ref_name);
697 }
698 if (!strcmp(*head_points_at, head_ref_name))
699 /* detached HEAD */
700 null_is_error = 1;
701 else if (!starts_with(*head_points_at, "refs/heads/")) {
702 errors_found |= ERROR_REFS;
703 return error(_("%s points to something strange (%s)"),
704 head_ref_name, *head_points_at);
705 }
706 if (is_null_oid(head_oid)) {
707 if (null_is_error) {
708 errors_found |= ERROR_REFS;
709 return error(_("%s: detached HEAD points at nothing"),
710 head_ref_name);
711 }
712 fprintf_ln(stderr,
713 _("notice: %s points to an unborn branch (%s)"),
714 head_ref_name, *head_points_at + 11);
715 }
716 return 0;
717 }
718
719 static int fsck_cache_tree(struct cache_tree *it)
720 {
721 int i;
722 int err = 0;
723
724 if (verbose)
725 fprintf_ln(stderr, _("Checking cache tree"));
726
727 if (0 <= it->entry_count) {
728 struct object *obj = parse_object(the_repository, &it->oid);
729 if (!obj) {
730 error(_("%s: invalid sha1 pointer in cache-tree"),
731 oid_to_hex(&it->oid));
732 errors_found |= ERROR_REFS;
733 return 1;
734 }
735 obj->flags |= USED;
736 fsck_put_object_name(&fsck_walk_options, &it->oid, ":");
737 mark_object_reachable(obj);
738 if (obj->type != OBJ_TREE)
739 err |= objerror(obj, _("non-tree in cache-tree"));
740 }
741 for (i = 0; i < it->subtree_nr; i++)
742 err |= fsck_cache_tree(it->down[i]->cache_tree);
743 return err;
744 }
745
746 static void mark_object_for_connectivity(const struct object_id *oid)
747 {
748 struct object *obj = lookup_unknown_object(oid);
749 obj->flags |= HAS_OBJ;
750 }
751
752 static int mark_loose_for_connectivity(const struct object_id *oid,
753 const char *path,
754 void *data)
755 {
756 mark_object_for_connectivity(oid);
757 return 0;
758 }
759
760 static int mark_packed_for_connectivity(const struct object_id *oid,
761 struct packed_git *pack,
762 uint32_t pos,
763 void *data)
764 {
765 mark_object_for_connectivity(oid);
766 return 0;
767 }
768
769 static char const * const fsck_usage[] = {
770 N_("git fsck [<options>] [<object>...]"),
771 NULL
772 };
773
774 static struct option fsck_opts[] = {
775 OPT__VERBOSE(&verbose, N_("be verbose")),
776 OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
777 OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
778 OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
779 OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
780 OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
781 OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
782 OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
783 OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
784 OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
785 OPT_BOOL(0, "lost-found", &write_lost_and_found,
786 N_("write dangling objects in .git/lost-found")),
787 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
788 OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
789 OPT_END(),
790 };
791
792 int cmd_fsck(int argc, const char **argv, const char *prefix)
793 {
794 int i;
795 struct object_directory *odb;
796
797 /* fsck knows how to handle missing promisor objects */
798 fetch_if_missing = 0;
799
800 errors_found = 0;
801 read_replace_refs = 0;
802
803 argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
804
805 fsck_walk_options.walk = mark_object;
806 fsck_obj_options.walk = mark_used;
807 fsck_obj_options.error_func = fsck_error_func;
808 if (check_strict)
809 fsck_obj_options.strict = 1;
810
811 if (show_progress == -1)
812 show_progress = isatty(2);
813 if (verbose)
814 show_progress = 0;
815
816 if (write_lost_and_found) {
817 check_full = 1;
818 include_reflogs = 0;
819 }
820
821 if (name_objects)
822 fsck_enable_object_names(&fsck_walk_options);
823
824 git_config(fsck_config, NULL);
825
826 if (connectivity_only) {
827 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
828 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
829 } else {
830 prepare_alt_odb(the_repository);
831 for (odb = the_repository->objects->odb; odb; odb = odb->next)
832 fsck_object_dir(odb->path);
833
834 if (check_full) {
835 struct packed_git *p;
836 uint32_t total = 0, count = 0;
837 struct progress *progress = NULL;
838
839 if (show_progress) {
840 for (p = get_all_packs(the_repository); p;
841 p = p->next) {
842 if (open_pack_index(p))
843 continue;
844 total += p->num_objects;
845 }
846
847 progress = start_progress(_("Checking objects"), total);
848 }
849 for (p = get_all_packs(the_repository); p;
850 p = p->next) {
851 /* verify gives error messages itself */
852 if (verify_pack(the_repository,
853 p, fsck_obj_buffer,
854 progress, count))
855 errors_found |= ERROR_PACK;
856 count += p->num_objects;
857 }
858 stop_progress(&progress);
859 }
860
861 if (fsck_finish(&fsck_obj_options))
862 errors_found |= ERROR_OBJECT;
863 }
864
865 for (i = 0; i < argc; i++) {
866 const char *arg = argv[i];
867 struct object_id oid;
868 if (!get_oid(arg, &oid)) {
869 struct object *obj = lookup_object(the_repository,
870 &oid);
871
872 if (!obj || !(obj->flags & HAS_OBJ)) {
873 if (is_promisor_object(&oid))
874 continue;
875 error(_("%s: object missing"), oid_to_hex(&oid));
876 errors_found |= ERROR_OBJECT;
877 continue;
878 }
879
880 obj->flags |= USED;
881 fsck_put_object_name(&fsck_walk_options, &oid,
882 "%s", arg);
883 mark_object_reachable(obj);
884 continue;
885 }
886 error(_("invalid parameter: expected sha1, got '%s'"), arg);
887 errors_found |= ERROR_OBJECT;
888 }
889
890 /*
891 * If we've not been given any explicit head information, do the
892 * default ones from .git/refs. We also consider the index file
893 * in this case (ie this implies --cache).
894 */
895 if (!argc) {
896 get_default_heads();
897 keep_cache_objects = 1;
898 }
899
900 if (keep_cache_objects) {
901 verify_index_checksum = 1;
902 verify_ce_order = 1;
903 read_cache();
904 for (i = 0; i < active_nr; i++) {
905 unsigned int mode;
906 struct blob *blob;
907 struct object *obj;
908
909 mode = active_cache[i]->ce_mode;
910 if (S_ISGITLINK(mode))
911 continue;
912 blob = lookup_blob(the_repository,
913 &active_cache[i]->oid);
914 if (!blob)
915 continue;
916 obj = &blob->object;
917 obj->flags |= USED;
918 fsck_put_object_name(&fsck_walk_options, &obj->oid,
919 ":%s", active_cache[i]->name);
920 mark_object_reachable(obj);
921 }
922 if (active_cache_tree)
923 fsck_cache_tree(active_cache_tree);
924 }
925
926 check_connectivity();
927
928 if (!git_config_get_bool("core.commitgraph", &i) && i) {
929 struct child_process commit_graph_verify = CHILD_PROCESS_INIT;
930 const char *verify_argv[] = { "commit-graph", "verify", NULL, NULL, NULL };
931
932 prepare_alt_odb(the_repository);
933 for (odb = the_repository->objects->odb; odb; odb = odb->next) {
934 child_process_init(&commit_graph_verify);
935 commit_graph_verify.argv = verify_argv;
936 commit_graph_verify.git_cmd = 1;
937 verify_argv[2] = "--object-dir";
938 verify_argv[3] = odb->path;
939 if (run_command(&commit_graph_verify))
940 errors_found |= ERROR_COMMIT_GRAPH;
941 }
942 }
943
944 if (!git_config_get_bool("core.multipackindex", &i) && i) {
945 struct child_process midx_verify = CHILD_PROCESS_INIT;
946 const char *midx_argv[] = { "multi-pack-index", "verify", NULL, NULL, NULL };
947
948 prepare_alt_odb(the_repository);
949 for (odb = the_repository->objects->odb; odb; odb = odb->next) {
950 child_process_init(&midx_verify);
951 midx_verify.argv = midx_argv;
952 midx_verify.git_cmd = 1;
953 midx_argv[2] = "--object-dir";
954 midx_argv[3] = odb->path;
955 if (run_command(&midx_verify))
956 errors_found |= ERROR_MULTI_PACK_INDEX;
957 }
958 }
959
960 return errors_found;
961 }