3 #include "repository.h"
8 #include "cache-tree.h"
9 #include "unpack-trees.h"
13 #include "split-index.h"
14 #include "submodule.h"
15 #include "submodule-config.h"
16 #include "fsmonitor.h"
17 #include "object-store.h"
18 #include "promisor-remote.h"
20 #include "parallel-checkout.h"
23 * Error messages expected by scripts out of plumbing commands such as
24 * read-tree. Non-scripted Porcelain is not required to use these messages
25 * and in fact are encouraged to reword them to better suit their particular
26 * situation better. See how "git checkout" and "git merge" replaces
27 * them using setup_unpack_trees_porcelain(), for example.
29 static const char *unpack_plumbing_errors
[NB_UNPACK_TREES_WARNING_TYPES
] = {
30 /* ERROR_WOULD_OVERWRITE */
31 "Entry '%s' would be overwritten by merge. Cannot merge.",
33 /* ERROR_NOT_UPTODATE_FILE */
34 "Entry '%s' not uptodate. Cannot merge.",
36 /* ERROR_NOT_UPTODATE_DIR */
37 "Updating '%s' would lose untracked files in it",
39 /* ERROR_CWD_IN_THE_WAY */
40 "Refusing to remove '%s' since it is the current working directory.",
42 /* ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN */
43 "Untracked working tree file '%s' would be overwritten by merge.",
45 /* ERROR_WOULD_LOSE_UNTRACKED_REMOVED */
46 "Untracked working tree file '%s' would be removed by merge.",
48 /* ERROR_BIND_OVERLAP */
49 "Entry '%s' overlaps with '%s'. Cannot bind.",
51 /* ERROR_WOULD_LOSE_SUBMODULE */
52 "Submodule '%s' cannot checkout new HEAD.",
54 /* NB_UNPACK_TREES_ERROR_TYPES; just a meta value */
57 /* WARNING_SPARSE_NOT_UPTODATE_FILE */
58 "Path '%s' not uptodate; will not remove from working tree.",
60 /* WARNING_SPARSE_UNMERGED_FILE */
61 "Path '%s' unmerged; will not remove from working tree.",
63 /* WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN */
64 "Path '%s' already present; will not overwrite with sparse update.",
67 #define ERRORMSG(o,type) \
68 ( ((o) && (o)->msgs[(type)]) \
69 ? ((o)->msgs[(type)]) \
70 : (unpack_plumbing_errors[(type)]) )
72 static const char *super_prefixed(const char *path
)
75 * It is necessary and sufficient to have two static buffers
76 * here, as the return value of this function is fed to
77 * error() using the unpack_*_errors[] templates we see above.
79 static struct strbuf buf
[2] = {STRBUF_INIT
, STRBUF_INIT
};
80 static int super_prefix_len
= -1;
81 static unsigned idx
= ARRAY_SIZE(buf
) - 1;
83 if (super_prefix_len
< 0) {
84 const char *super_prefix
= get_super_prefix();
89 for (i
= 0; i
< ARRAY_SIZE(buf
); i
++)
90 strbuf_addstr(&buf
[i
], super_prefix
);
91 super_prefix_len
= buf
[0].len
;
95 if (!super_prefix_len
)
98 if (++idx
>= ARRAY_SIZE(buf
))
101 strbuf_setlen(&buf
[idx
], super_prefix_len
);
102 strbuf_addstr(&buf
[idx
], path
);
107 void setup_unpack_trees_porcelain(struct unpack_trees_options
*opts
,
111 const char **msgs
= opts
->msgs
;
114 strvec_init(&opts
->msgs_to_free
);
116 if (!strcmp(cmd
, "checkout"))
117 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
118 ? _("Your local changes to the following files would be overwritten by checkout:\n%%s"
119 "Please commit your changes or stash them before you switch branches.")
120 : _("Your local changes to the following files would be overwritten by checkout:\n%%s");
121 else if (!strcmp(cmd
, "merge"))
122 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
123 ? _("Your local changes to the following files would be overwritten by merge:\n%%s"
124 "Please commit your changes or stash them before you merge.")
125 : _("Your local changes to the following files would be overwritten by merge:\n%%s");
127 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
128 ? _("Your local changes to the following files would be overwritten by %s:\n%%s"
129 "Please commit your changes or stash them before you %s.")
130 : _("Your local changes to the following files would be overwritten by %s:\n%%s");
131 msgs
[ERROR_WOULD_OVERWRITE
] = msgs
[ERROR_NOT_UPTODATE_FILE
] =
132 strvec_pushf(&opts
->msgs_to_free
, msg
, cmd
, cmd
);
134 msgs
[ERROR_NOT_UPTODATE_DIR
] =
135 _("Updating the following directories would lose untracked files in them:\n%s");
137 msgs
[ERROR_CWD_IN_THE_WAY
] =
138 _("Refusing to remove the current working directory:\n%s");
140 if (!strcmp(cmd
, "checkout"))
141 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
142 ? _("The following untracked working tree files would be removed by checkout:\n%%s"
143 "Please move or remove them before you switch branches.")
144 : _("The following untracked working tree files would be removed by checkout:\n%%s");
145 else if (!strcmp(cmd
, "merge"))
146 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
147 ? _("The following untracked working tree files would be removed by merge:\n%%s"
148 "Please move or remove them before you merge.")
149 : _("The following untracked working tree files would be removed by merge:\n%%s");
151 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
152 ? _("The following untracked working tree files would be removed by %s:\n%%s"
153 "Please move or remove them before you %s.")
154 : _("The following untracked working tree files would be removed by %s:\n%%s");
155 msgs
[ERROR_WOULD_LOSE_UNTRACKED_REMOVED
] =
156 strvec_pushf(&opts
->msgs_to_free
, msg
, cmd
, cmd
);
158 if (!strcmp(cmd
, "checkout"))
159 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
160 ? _("The following untracked working tree files would be overwritten by checkout:\n%%s"
161 "Please move or remove them before you switch branches.")
162 : _("The following untracked working tree files would be overwritten by checkout:\n%%s");
163 else if (!strcmp(cmd
, "merge"))
164 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
165 ? _("The following untracked working tree files would be overwritten by merge:\n%%s"
166 "Please move or remove them before you merge.")
167 : _("The following untracked working tree files would be overwritten by merge:\n%%s");
169 msg
= advice_enabled(ADVICE_COMMIT_BEFORE_MERGE
)
170 ? _("The following untracked working tree files would be overwritten by %s:\n%%s"
171 "Please move or remove them before you %s.")
172 : _("The following untracked working tree files would be overwritten by %s:\n%%s");
173 msgs
[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN
] =
174 strvec_pushf(&opts
->msgs_to_free
, msg
, cmd
, cmd
);
177 * Special case: ERROR_BIND_OVERLAP refers to a pair of paths, we
178 * cannot easily display it as a list.
180 msgs
[ERROR_BIND_OVERLAP
] = _("Entry '%s' overlaps with '%s'. Cannot bind.");
182 msgs
[ERROR_WOULD_LOSE_SUBMODULE
] =
183 _("Cannot update submodule:\n%s");
185 msgs
[WARNING_SPARSE_NOT_UPTODATE_FILE
] =
186 _("The following paths are not up to date and were left despite sparse patterns:\n%s");
187 msgs
[WARNING_SPARSE_UNMERGED_FILE
] =
188 _("The following paths are unmerged and were left despite sparse patterns:\n%s");
189 msgs
[WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN
] =
190 _("The following paths were already present and thus not updated despite sparse patterns:\n%s");
192 opts
->show_all_errors
= 1;
193 /* rejected paths may not have a static buffer */
194 for (i
= 0; i
< ARRAY_SIZE(opts
->unpack_rejects
); i
++)
195 opts
->unpack_rejects
[i
].strdup_strings
= 1;
198 void clear_unpack_trees_porcelain(struct unpack_trees_options
*opts
)
200 strvec_clear(&opts
->msgs_to_free
);
201 memset(opts
->msgs
, 0, sizeof(opts
->msgs
));
204 static int do_add_entry(struct unpack_trees_options
*o
, struct cache_entry
*ce
,
205 unsigned int set
, unsigned int clear
)
212 ce
->ce_flags
= (ce
->ce_flags
& ~clear
) | set
;
213 return add_index_entry(&o
->result
, ce
,
214 ADD_CACHE_OK_TO_ADD
| ADD_CACHE_OK_TO_REPLACE
);
217 static void add_entry(struct unpack_trees_options
*o
,
218 const struct cache_entry
*ce
,
219 unsigned int set
, unsigned int clear
)
221 do_add_entry(o
, dup_cache_entry(ce
, &o
->result
), set
, clear
);
225 * add error messages on path <path>
226 * corresponding to the type <e> with the message <msg>
227 * indicating if it should be display in porcelain or not
229 static int add_rejected_path(struct unpack_trees_options
*o
,
230 enum unpack_trees_error_types e
,
236 if (!o
->show_all_errors
)
237 return error(ERRORMSG(o
, e
), super_prefixed(path
));
240 * Otherwise, insert in a list for future display by
241 * display_(error|warning)_msgs()
243 string_list_append(&o
->unpack_rejects
[e
], path
);
248 * display all the error messages stored in a nice way
250 static void display_error_msgs(struct unpack_trees_options
*o
)
253 unsigned error_displayed
= 0;
254 for (e
= 0; e
< NB_UNPACK_TREES_ERROR_TYPES
; e
++) {
255 struct string_list
*rejects
= &o
->unpack_rejects
[e
];
257 if (rejects
->nr
> 0) {
259 struct strbuf path
= STRBUF_INIT
;
262 for (i
= 0; i
< rejects
->nr
; i
++)
263 strbuf_addf(&path
, "\t%s\n", rejects
->items
[i
].string
);
264 error(ERRORMSG(o
, e
), super_prefixed(path
.buf
));
265 strbuf_release(&path
);
267 string_list_clear(rejects
, 0);
270 fprintf(stderr
, _("Aborting\n"));
274 * display all the warning messages stored in a nice way
276 static void display_warning_msgs(struct unpack_trees_options
*o
)
279 unsigned warning_displayed
= 0;
280 for (e
= NB_UNPACK_TREES_ERROR_TYPES
+ 1;
281 e
< NB_UNPACK_TREES_WARNING_TYPES
; e
++) {
282 struct string_list
*rejects
= &o
->unpack_rejects
[e
];
284 if (rejects
->nr
> 0) {
286 struct strbuf path
= STRBUF_INIT
;
288 warning_displayed
= 1;
289 for (i
= 0; i
< rejects
->nr
; i
++)
290 strbuf_addf(&path
, "\t%s\n", rejects
->items
[i
].string
);
291 warning(ERRORMSG(o
, e
), super_prefixed(path
.buf
));
292 strbuf_release(&path
);
294 string_list_clear(rejects
, 0);
296 if (warning_displayed
)
297 fprintf(stderr
, _("After fixing the above paths, you may want to run `git sparse-checkout reapply`.\n"));
299 static int check_submodule_move_head(const struct cache_entry
*ce
,
302 struct unpack_trees_options
*o
)
304 unsigned flags
= SUBMODULE_MOVE_HEAD_DRY_RUN
;
305 const struct submodule
*sub
= submodule_from_ce(ce
);
311 flags
|= SUBMODULE_MOVE_HEAD_FORCE
;
313 if (submodule_move_head(ce
->name
, old_id
, new_id
, flags
))
314 return add_rejected_path(o
, ERROR_WOULD_LOSE_SUBMODULE
, ce
->name
);
319 * Perform the loading of the repository's gitmodules file. This function is
320 * used by 'check_update()' to perform loading of the gitmodules file in two
321 * different situations:
322 * (1) before removing entries from the working tree if the gitmodules file has
323 * been marked for removal. This situation is specified by 'state' == NULL.
324 * (2) before checking out entries to the working tree if the gitmodules file
325 * has been marked for update. This situation is specified by 'state' != NULL.
327 static void load_gitmodules_file(struct index_state
*index
,
328 struct checkout
*state
)
330 int pos
= index_name_pos(index
, GITMODULES_FILE
, strlen(GITMODULES_FILE
));
333 struct cache_entry
*ce
= index
->cache
[pos
];
334 if (!state
&& ce
->ce_flags
& CE_WT_REMOVE
) {
335 repo_read_gitmodules(the_repository
, 0);
336 } else if (state
&& (ce
->ce_flags
& CE_UPDATE
)) {
337 submodule_free(the_repository
);
338 checkout_entry(ce
, state
, NULL
, NULL
);
339 repo_read_gitmodules(the_repository
, 0);
344 static struct progress
*get_progress(struct unpack_trees_options
*o
,
345 struct index_state
*index
)
347 unsigned cnt
= 0, total
= 0;
349 if (!o
->update
|| !o
->verbose_update
)
352 for (; cnt
< index
->cache_nr
; cnt
++) {
353 const struct cache_entry
*ce
= index
->cache
[cnt
];
354 if (ce
->ce_flags
& (CE_UPDATE
| CE_WT_REMOVE
))
358 return start_delayed_progress(_("Updating files"), total
);
361 static void setup_collided_checkout_detection(struct checkout
*state
,
362 struct index_state
*index
)
367 for (i
= 0; i
< index
->cache_nr
; i
++)
368 index
->cache
[i
]->ce_flags
&= ~CE_MATCHED
;
371 static void report_collided_checkout(struct index_state
*index
)
373 struct string_list list
= STRING_LIST_INIT_NODUP
;
376 for (i
= 0; i
< index
->cache_nr
; i
++) {
377 struct cache_entry
*ce
= index
->cache
[i
];
379 if (!(ce
->ce_flags
& CE_MATCHED
))
382 string_list_append(&list
, ce
->name
);
383 ce
->ce_flags
&= ~CE_MATCHED
;
386 list
.cmp
= fspathcmp
;
387 string_list_sort(&list
);
390 warning(_("the following paths have collided (e.g. case-sensitive paths\n"
391 "on a case-insensitive filesystem) and only one from the same\n"
392 "colliding group is in the working tree:\n"));
394 for (i
= 0; i
< list
.nr
; i
++)
395 fprintf(stderr
, " '%s'\n", list
.items
[i
].string
);
398 string_list_clear(&list
, 0);
401 static int must_checkout(const struct cache_entry
*ce
)
403 return ce
->ce_flags
& CE_UPDATE
;
406 static int check_updates(struct unpack_trees_options
*o
,
407 struct index_state
*index
)
411 struct progress
*progress
;
412 struct checkout state
= CHECKOUT_INIT
;
413 int i
, pc_workers
, pc_threshold
;
415 trace_performance_enter();
418 state
.refresh_cache
= 1;
419 state
.istate
= index
;
420 clone_checkout_metadata(&state
.meta
, &o
->meta
, NULL
);
422 if (!o
->update
|| o
->dry_run
) {
423 remove_marked_cache_entries(index
, 0);
424 trace_performance_leave("check_updates");
429 setup_collided_checkout_detection(&state
, index
);
431 progress
= get_progress(o
, index
);
433 /* Start with clean cache to avoid using any possibly outdated info. */
434 invalidate_lstat_cache();
436 git_attr_set_direction(GIT_ATTR_CHECKOUT
);
438 if (should_update_submodules())
439 load_gitmodules_file(index
, NULL
);
441 for (i
= 0; i
< index
->cache_nr
; i
++) {
442 const struct cache_entry
*ce
= index
->cache
[i
];
444 if (ce
->ce_flags
& CE_WT_REMOVE
) {
445 display_progress(progress
, ++cnt
);
450 remove_marked_cache_entries(index
, 0);
451 remove_scheduled_dirs();
453 if (should_update_submodules())
454 load_gitmodules_file(index
, &state
);
456 if (has_promisor_remote())
458 * Prefetch the objects that are to be checked out in the loop
461 prefetch_cache_entries(index
, must_checkout
);
463 get_parallel_checkout_configs(&pc_workers
, &pc_threshold
);
465 enable_delayed_checkout(&state
);
467 init_parallel_checkout();
468 for (i
= 0; i
< index
->cache_nr
; i
++) {
469 struct cache_entry
*ce
= index
->cache
[i
];
471 if (must_checkout(ce
)) {
472 size_t last_pc_queue_size
= pc_queue_size();
474 if (ce
->ce_flags
& CE_WT_REMOVE
)
475 BUG("both update and delete flags are set on %s",
477 ce
->ce_flags
&= ~CE_UPDATE
;
478 errs
|= checkout_entry(ce
, &state
, NULL
, NULL
);
480 if (last_pc_queue_size
== pc_queue_size())
481 display_progress(progress
, ++cnt
);
485 errs
|= run_parallel_checkout(&state
, pc_workers
, pc_threshold
,
487 stop_progress(&progress
);
488 errs
|= finish_delayed_checkout(&state
, NULL
, o
->verbose_update
);
489 git_attr_set_direction(GIT_ATTR_CHECKIN
);
492 report_collided_checkout(index
);
494 trace_performance_leave("check_updates");
498 static int verify_uptodate_sparse(const struct cache_entry
*ce
,
499 struct unpack_trees_options
*o
);
500 static int verify_absent_sparse(const struct cache_entry
*ce
,
501 enum unpack_trees_error_types
,
502 struct unpack_trees_options
*o
);
504 static int apply_sparse_checkout(struct index_state
*istate
,
505 struct cache_entry
*ce
,
506 struct unpack_trees_options
*o
)
508 int was_skip_worktree
= ce_skip_worktree(ce
);
510 if (ce
->ce_flags
& CE_NEW_SKIP_WORKTREE
)
511 ce
->ce_flags
|= CE_SKIP_WORKTREE
;
513 ce
->ce_flags
&= ~CE_SKIP_WORKTREE
;
514 if (was_skip_worktree
!= ce_skip_worktree(ce
)) {
515 ce
->ce_flags
|= CE_UPDATE_IN_BASE
;
516 mark_fsmonitor_invalid(istate
, ce
);
517 istate
->cache_changed
|= CE_ENTRY_CHANGED
;
521 * if (!was_skip_worktree && !ce_skip_worktree()) {
522 * This is perfectly normal. Move on;
527 * Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout
528 * area as a result of ce_skip_worktree() shortcuts in
529 * verify_absent() and verify_uptodate().
530 * Make sure they don't modify worktree if they are already
531 * outside checkout area
533 if (was_skip_worktree
&& ce_skip_worktree(ce
)) {
534 ce
->ce_flags
&= ~CE_UPDATE
;
537 * By default, when CE_REMOVE is on, CE_WT_REMOVE is also
538 * on to get that file removed from both index and worktree.
539 * If that file is already outside worktree area, don't
542 if (ce
->ce_flags
& CE_REMOVE
)
543 ce
->ce_flags
&= ~CE_WT_REMOVE
;
546 if (!was_skip_worktree
&& ce_skip_worktree(ce
)) {
548 * If CE_UPDATE is set, verify_uptodate() must be called already
549 * also stat info may have lost after merged_entry() so calling
550 * verify_uptodate() again may fail
552 if (!(ce
->ce_flags
& CE_UPDATE
) &&
553 verify_uptodate_sparse(ce
, o
)) {
554 ce
->ce_flags
&= ~CE_SKIP_WORKTREE
;
557 ce
->ce_flags
|= CE_WT_REMOVE
;
558 ce
->ce_flags
&= ~CE_UPDATE
;
560 if (was_skip_worktree
&& !ce_skip_worktree(ce
)) {
561 if (verify_absent_sparse(ce
, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN
, o
))
563 ce
->ce_flags
|= CE_UPDATE
;
568 static int warn_conflicted_path(struct index_state
*istate
,
570 struct unpack_trees_options
*o
)
572 char *conflicting_path
= istate
->cache
[i
]->name
;
575 add_rejected_path(o
, WARNING_SPARSE_UNMERGED_FILE
, conflicting_path
);
577 /* Find out how many higher stage entries are at same path */
578 while ((++count
) + i
< istate
->cache_nr
&&
579 !strcmp(conflicting_path
, istate
->cache
[count
+ i
]->name
))
585 static inline int call_unpack_fn(const struct cache_entry
* const *src
,
586 struct unpack_trees_options
*o
)
588 int ret
= o
->fn(src
, o
);
594 static void mark_ce_used(struct cache_entry
*ce
, struct unpack_trees_options
*o
)
596 ce
->ce_flags
|= CE_UNPACKED
;
599 * If this is a sparse directory, don't advance cache_bottom.
600 * That will be advanced later using the cache-tree data.
602 if (S_ISSPARSEDIR(ce
->ce_mode
))
605 if (o
->cache_bottom
< o
->src_index
->cache_nr
&&
606 o
->src_index
->cache
[o
->cache_bottom
] == ce
) {
607 int bottom
= o
->cache_bottom
;
608 while (bottom
< o
->src_index
->cache_nr
&&
609 o
->src_index
->cache
[bottom
]->ce_flags
& CE_UNPACKED
)
611 o
->cache_bottom
= bottom
;
615 static void mark_all_ce_unused(struct index_state
*index
)
618 for (i
= 0; i
< index
->cache_nr
; i
++)
619 index
->cache
[i
]->ce_flags
&= ~(CE_UNPACKED
| CE_ADDED
| CE_NEW_SKIP_WORKTREE
);
622 static int locate_in_src_index(const struct cache_entry
*ce
,
623 struct unpack_trees_options
*o
)
625 struct index_state
*index
= o
->src_index
;
626 int len
= ce_namelen(ce
);
627 int pos
= index_name_pos(index
, ce
->name
, len
);
634 * We call unpack_index_entry() with an unmerged cache entry
635 * only in diff-index, and it wants a single callback. Skip
636 * the other unmerged entry with the same name.
638 static void mark_ce_used_same_name(struct cache_entry
*ce
,
639 struct unpack_trees_options
*o
)
641 struct index_state
*index
= o
->src_index
;
642 int len
= ce_namelen(ce
);
645 for (pos
= locate_in_src_index(ce
, o
); pos
< index
->cache_nr
; pos
++) {
646 struct cache_entry
*next
= index
->cache
[pos
];
647 if (len
!= ce_namelen(next
) ||
648 memcmp(ce
->name
, next
->name
, len
))
650 mark_ce_used(next
, o
);
654 static struct cache_entry
*next_cache_entry(struct unpack_trees_options
*o
, int *hint
)
656 const struct index_state
*index
= o
->src_index
;
657 int pos
= o
->cache_bottom
;
662 while (pos
< index
->cache_nr
) {
663 struct cache_entry
*ce
= index
->cache
[pos
];
664 if (!(ce
->ce_flags
& CE_UNPACKED
)) {
675 static void add_same_unmerged(const struct cache_entry
*ce
,
676 struct unpack_trees_options
*o
)
678 struct index_state
*index
= o
->src_index
;
679 int len
= ce_namelen(ce
);
680 int pos
= index_name_pos(index
, ce
->name
, len
);
683 die("programming error in a caller of mark_ce_used_same_name");
684 for (pos
= -pos
- 1; pos
< index
->cache_nr
; pos
++) {
685 struct cache_entry
*next
= index
->cache
[pos
];
686 if (len
!= ce_namelen(next
) ||
687 memcmp(ce
->name
, next
->name
, len
))
689 add_entry(o
, next
, 0, 0);
690 mark_ce_used(next
, o
);
694 static int unpack_index_entry(struct cache_entry
*ce
,
695 struct unpack_trees_options
*o
)
697 const struct cache_entry
*src
[MAX_UNPACK_TREES
+ 1] = { NULL
, };
704 if (o
->skip_unmerged
) {
705 add_entry(o
, ce
, 0, 0);
709 ret
= call_unpack_fn(src
, o
);
711 mark_ce_used_same_name(ce
, o
);
715 static int find_cache_pos(struct traverse_info
*, const char *p
, size_t len
);
717 static void restore_cache_bottom(struct traverse_info
*info
, int bottom
)
719 struct unpack_trees_options
*o
= info
->data
;
721 if (o
->diff_index_cached
)
723 o
->cache_bottom
= bottom
;
726 static int switch_cache_bottom(struct traverse_info
*info
)
728 struct unpack_trees_options
*o
= info
->data
;
731 if (o
->diff_index_cached
)
733 ret
= o
->cache_bottom
;
734 pos
= find_cache_pos(info
->prev
, info
->name
, info
->namelen
);
737 o
->cache_bottom
= -2 - pos
;
739 o
->cache_bottom
= o
->src_index
->cache_nr
;
743 static inline int are_same_oid(struct name_entry
*name_j
, struct name_entry
*name_k
)
745 return !is_null_oid(&name_j
->oid
) && !is_null_oid(&name_k
->oid
) && oideq(&name_j
->oid
, &name_k
->oid
);
748 static int all_trees_same_as_cache_tree(int n
, unsigned long dirmask
,
749 struct name_entry
*names
,
750 struct traverse_info
*info
)
752 struct unpack_trees_options
*o
= info
->data
;
755 if (!o
->merge
|| dirmask
!= ((1 << n
) - 1))
758 for (i
= 1; i
< n
; i
++)
759 if (!are_same_oid(names
, names
+ i
))
762 return cache_tree_matches_traversal(o
->src_index
->cache_tree
, names
, info
);
765 static int index_pos_by_traverse_info(struct name_entry
*names
,
766 struct traverse_info
*info
)
768 struct unpack_trees_options
*o
= info
->data
;
769 struct strbuf name
= STRBUF_INIT
;
772 strbuf_make_traverse_path(&name
, info
, names
->path
, names
->pathlen
);
773 strbuf_addch(&name
, '/');
774 pos
= index_name_pos(o
->src_index
, name
.buf
, name
.len
);
776 if (!o
->src_index
->sparse_index
||
777 !(o
->src_index
->cache
[pos
]->ce_flags
& CE_SKIP_WORKTREE
))
778 BUG("This is a directory and should not exist in index");
782 if (pos
>= o
->src_index
->cache_nr
||
783 !starts_with(o
->src_index
->cache
[pos
]->name
, name
.buf
) ||
784 (pos
> 0 && starts_with(o
->src_index
->cache
[pos
-1]->name
, name
.buf
)))
785 BUG("pos %d doesn't point to the first entry of %s in index",
787 strbuf_release(&name
);
792 * Fast path if we detect that all trees are the same as cache-tree at this
793 * path. We'll walk these trees in an iterative loop using cache-tree/index
794 * instead of ODB since we already know what these trees contain.
796 static int traverse_by_cache_tree(int pos
, int nr_entries
, int nr_names
,
797 struct traverse_info
*info
)
799 struct cache_entry
*src
[MAX_UNPACK_TREES
+ 1] = { NULL
, };
800 struct unpack_trees_options
*o
= info
->data
;
801 struct cache_entry
*tree_ce
= NULL
;
806 BUG("We need cache-tree to do this optimization");
809 * Do what unpack_callback() and unpack_single_entry() normally
810 * do. But we walk all paths in an iterative loop instead.
812 * D/F conflicts and higher stage entries are not a concern
813 * because cache-tree would be invalidated and we would never
814 * get here in the first place.
816 for (i
= 0; i
< nr_entries
; i
++) {
817 int new_ce_len
, len
, rc
;
819 src
[0] = o
->src_index
->cache
[pos
+ i
];
821 len
= ce_namelen(src
[0]);
822 new_ce_len
= cache_entry_size(len
);
824 if (new_ce_len
> ce_len
) {
826 tree_ce
= xrealloc(tree_ce
, new_ce_len
);
827 memset(tree_ce
, 0, new_ce_len
);
830 tree_ce
->ce_flags
= create_ce_flags(0);
832 for (d
= 1; d
<= nr_names
; d
++)
836 tree_ce
->ce_mode
= src
[0]->ce_mode
;
837 tree_ce
->ce_namelen
= len
;
838 oidcpy(&tree_ce
->oid
, &src
[0]->oid
);
839 memcpy(tree_ce
->name
, src
[0]->name
, len
+ 1);
841 rc
= call_unpack_fn((const struct cache_entry
* const *)src
, o
);
847 mark_ce_used(src
[0], o
);
851 printf("Unpacked %d entries from %s to %s using cache-tree\n",
853 o
->src_index
->cache
[pos
]->name
,
854 o
->src_index
->cache
[pos
+ nr_entries
- 1]->name
);
858 static int traverse_trees_recursive(int n
, unsigned long dirmask
,
859 unsigned long df_conflicts
,
860 struct name_entry
*names
,
861 struct traverse_info
*info
)
863 struct unpack_trees_options
*o
= info
->data
;
866 struct tree_desc t
[MAX_UNPACK_TREES
];
867 void *buf
[MAX_UNPACK_TREES
];
868 struct traverse_info newinfo
;
869 struct name_entry
*p
;
872 nr_entries
= all_trees_same_as_cache_tree(n
, dirmask
, names
, info
);
873 if (nr_entries
> 0) {
874 int pos
= index_pos_by_traverse_info(names
, info
);
876 if (!o
->merge
|| df_conflicts
)
877 BUG("Wrong condition to get here buddy");
880 * All entries up to 'pos' must have been processed
881 * (i.e. marked CE_UNPACKED) at this point. But to be safe,
882 * save and restore cache_bottom anyway to not miss
883 * unprocessed entries before 'pos'.
885 bottom
= o
->cache_bottom
;
886 ret
= traverse_by_cache_tree(pos
, nr_entries
, n
, info
);
887 o
->cache_bottom
= bottom
;
897 newinfo
.pathspec
= info
->pathspec
;
898 newinfo
.name
= p
->path
;
899 newinfo
.namelen
= p
->pathlen
;
900 newinfo
.mode
= p
->mode
;
901 newinfo
.pathlen
= st_add3(newinfo
.pathlen
, tree_entry_len(p
), 1);
902 newinfo
.df_conflicts
|= df_conflicts
;
905 * Fetch the tree from the ODB for each peer directory in the
908 * For 2- and 3-way traversals, we try to avoid hitting the
909 * ODB twice for the same OID. This should yield a nice speed
910 * up in checkouts and merges when the commits are similar.
912 * We don't bother doing the full O(n^2) search for larger n,
913 * because wider traversals don't happen that often and we
914 * avoid the search setup.
916 * When 2 peer OIDs are the same, we just copy the tree
917 * descriptor data. This implicitly borrows the buffer
918 * data from the earlier cell.
920 for (i
= 0; i
< n
; i
++, dirmask
>>= 1) {
921 if (i
> 0 && are_same_oid(&names
[i
], &names
[i
- 1]))
923 else if (i
> 1 && are_same_oid(&names
[i
], &names
[i
- 2]))
926 const struct object_id
*oid
= NULL
;
929 buf
[nr_buf
++] = fill_tree_descriptor(the_repository
, t
+ i
, oid
);
933 bottom
= switch_cache_bottom(&newinfo
);
934 ret
= traverse_trees(o
->src_index
, n
, t
, &newinfo
);
935 restore_cache_bottom(&newinfo
, bottom
);
937 for (i
= 0; i
< nr_buf
; i
++)
944 * Compare the traverse-path to the cache entry without actually
945 * having to generate the textual representation of the traverse
948 * NOTE! This *only* compares up to the size of the traverse path
949 * itself - the caller needs to do the final check for the cache
950 * entry having more data at the end!
952 static int do_compare_entry_piecewise(const struct cache_entry
*ce
,
953 const struct traverse_info
*info
,
954 const char *name
, size_t namelen
,
961 int cmp
= do_compare_entry_piecewise(ce
, info
->prev
,
962 info
->name
, info
->namelen
,
967 pathlen
= info
->pathlen
;
968 ce_len
= ce_namelen(ce
);
970 /* If ce_len < pathlen then we must have previously hit "name == directory" entry */
971 if (ce_len
< pathlen
)
975 ce_name
= ce
->name
+ pathlen
;
977 return df_name_compare(ce_name
, ce_len
, S_IFREG
, name
, namelen
, mode
);
980 static int do_compare_entry(const struct cache_entry
*ce
,
981 const struct traverse_info
*info
,
982 const char *name
, size_t namelen
,
991 * If we have not precomputed the traverse path, it is quicker
992 * to avoid doing so. But if we have precomputed it,
993 * it is quicker to use the precomputed version.
995 if (!info
->traverse_path
)
996 return do_compare_entry_piecewise(ce
, info
, name
, namelen
, mode
);
998 cmp
= strncmp(ce
->name
, info
->traverse_path
, info
->pathlen
);
1002 pathlen
= info
->pathlen
;
1003 ce_len
= ce_namelen(ce
);
1005 if (ce_len
< pathlen
)
1009 ce_name
= ce
->name
+ pathlen
;
1011 ce_mode
= S_ISSPARSEDIR(ce
->ce_mode
) ? S_IFDIR
: S_IFREG
;
1012 return df_name_compare(ce_name
, ce_len
, ce_mode
, name
, namelen
, mode
);
1015 static int compare_entry(const struct cache_entry
*ce
, const struct traverse_info
*info
, const struct name_entry
*n
)
1017 int cmp
= do_compare_entry(ce
, info
, n
->path
, n
->pathlen
, n
->mode
);
1022 * At this point, we know that we have a prefix match. If ce
1023 * is a sparse directory, then allow an exact match. This only
1024 * works when the input name is a directory, since ce->name
1025 * ends in a directory separator.
1027 if (S_ISSPARSEDIR(ce
->ce_mode
) &&
1028 ce
->ce_namelen
== traverse_path_len(info
, tree_entry_len(n
)) + 1)
1032 * Even if the beginning compared identically, the ce should
1033 * compare as bigger than a directory leading up to it!
1035 return ce_namelen(ce
) > traverse_path_len(info
, tree_entry_len(n
));
1038 static int ce_in_traverse_path(const struct cache_entry
*ce
,
1039 const struct traverse_info
*info
)
1043 if (do_compare_entry(ce
, info
->prev
,
1044 info
->name
, info
->namelen
, info
->mode
))
1047 * If ce (blob) is the same name as the path (which is a tree
1048 * we will be descending into), it won't be inside it.
1050 return (info
->pathlen
< ce_namelen(ce
));
1053 static struct cache_entry
*create_ce_entry(const struct traverse_info
*info
,
1054 const struct name_entry
*n
,
1056 struct index_state
*istate
,
1058 int is_sparse_directory
)
1060 size_t len
= traverse_path_len(info
, tree_entry_len(n
));
1061 size_t alloc_len
= is_sparse_directory
? len
+ 1 : len
;
1062 struct cache_entry
*ce
=
1064 make_empty_transient_cache_entry(alloc_len
, NULL
) :
1065 make_empty_cache_entry(istate
, alloc_len
);
1067 ce
->ce_mode
= create_ce_mode(n
->mode
);
1068 ce
->ce_flags
= create_ce_flags(stage
);
1069 ce
->ce_namelen
= len
;
1070 oidcpy(&ce
->oid
, &n
->oid
);
1071 /* len+1 because the cache_entry allocates space for NUL */
1072 make_traverse_path(ce
->name
, len
+ 1, info
, n
->path
, n
->pathlen
);
1074 if (is_sparse_directory
) {
1075 ce
->name
[len
] = '/';
1076 ce
->name
[len
+ 1] = '\0';
1078 ce
->ce_flags
|= CE_SKIP_WORKTREE
;
1085 * Note that traverse_by_cache_tree() duplicates some logic in this function
1086 * without actually calling it. If you change the logic here you may need to
1087 * check and change there as well.
1089 static int unpack_single_entry(int n
, unsigned long mask
,
1090 unsigned long dirmask
,
1091 struct cache_entry
**src
,
1092 const struct name_entry
*names
,
1093 const struct traverse_info
*info
)
1096 struct unpack_trees_options
*o
= info
->data
;
1097 unsigned long conflicts
= info
->df_conflicts
| dirmask
;
1099 if (mask
== dirmask
&& !src
[0])
1103 * When we have a sparse directory entry for src[0],
1104 * then this isn't necessarily a directory-file conflict.
1106 if (mask
== dirmask
&& src
[0] &&
1107 S_ISSPARSEDIR(src
[0]->ce_mode
))
1111 * Ok, we've filled in up to any potential index entry in src[0],
1114 for (i
= 0; i
< n
; i
++) {
1116 unsigned int bit
= 1ul << i
;
1117 if (conflicts
& bit
) {
1118 src
[i
+ o
->merge
] = o
->df_conflict_entry
;
1125 else if (i
+ 1 < o
->head_idx
)
1127 else if (i
+ 1 > o
->head_idx
)
1133 * If the merge bit is set, then the cache entries are
1134 * discarded in the following block. In this case,
1135 * construct "transient" cache_entries, as they are
1136 * not stored in the index. otherwise construct the
1137 * cache entry from the index aware logic.
1139 src
[i
+ o
->merge
] = create_ce_entry(info
, names
+ i
, stage
,
1140 &o
->result
, o
->merge
,
1145 int rc
= call_unpack_fn((const struct cache_entry
* const *)src
,
1147 for (i
= 0; i
< n
; i
++) {
1148 struct cache_entry
*ce
= src
[i
+ o
->merge
];
1149 if (ce
!= o
->df_conflict_entry
)
1150 discard_cache_entry(ce
);
1155 for (i
= 0; i
< n
; i
++)
1156 if (src
[i
] && src
[i
] != o
->df_conflict_entry
)
1157 if (do_add_entry(o
, src
[i
], 0, 0))
1163 static int unpack_failed(struct unpack_trees_options
*o
, const char *message
)
1165 discard_index(&o
->result
);
1166 if (!o
->quiet
&& !o
->exiting_early
) {
1168 return error("%s", message
);
1175 * The tree traversal is looking at name p. If we have a matching entry,
1176 * return it. If name p is a directory in the index, do not return
1177 * anything, as we will want to match it when the traversal descends into
1180 static int find_cache_pos(struct traverse_info
*info
,
1181 const char *p
, size_t p_len
)
1184 struct unpack_trees_options
*o
= info
->data
;
1185 struct index_state
*index
= o
->src_index
;
1186 int pfxlen
= info
->pathlen
;
1188 for (pos
= o
->cache_bottom
; pos
< index
->cache_nr
; pos
++) {
1189 const struct cache_entry
*ce
= index
->cache
[pos
];
1190 const char *ce_name
, *ce_slash
;
1193 if (ce
->ce_flags
& CE_UNPACKED
) {
1195 * cache_bottom entry is already unpacked, so
1196 * we can never match it; don't check it
1199 if (pos
== o
->cache_bottom
)
1203 if (!ce_in_traverse_path(ce
, info
)) {
1205 * Check if we can skip future cache checks
1206 * (because we're already past all possible
1207 * entries in the traverse path).
1209 if (info
->traverse_path
) {
1210 if (strncmp(ce
->name
, info
->traverse_path
,
1216 ce_name
= ce
->name
+ pfxlen
;
1217 ce_slash
= strchr(ce_name
, '/');
1219 ce_len
= ce_slash
- ce_name
;
1221 ce_len
= ce_namelen(ce
) - pfxlen
;
1222 cmp
= name_compare(p
, p_len
, ce_name
, ce_len
);
1224 * Exact match; if we have a directory we need to
1225 * delay returning it.
1228 return ce_slash
? -2 - pos
: pos
;
1230 continue; /* keep looking */
1232 * ce_name sorts after p->path; could it be that we
1233 * have files under p->path directory in the index?
1234 * E.g. ce_name == "t-i", and p->path == "t"; we may
1235 * have "t/a" in the index.
1237 if (p_len
< ce_len
&& !memcmp(ce_name
, p
, p_len
) &&
1238 ce_name
[p_len
] < '/')
1239 continue; /* keep looking */
1246 * Given a sparse directory entry 'ce', compare ce->name to
1247 * info->traverse_path + p->path + '/' if info->traverse_path
1250 * Compare ce->name to p->path + '/' otherwise. Note that
1251 * ce->name must end in a trailing '/' because it is a sparse
1254 static int sparse_dir_matches_path(const struct cache_entry
*ce
,
1255 struct traverse_info
*info
,
1256 const struct name_entry
*p
)
1258 assert(S_ISSPARSEDIR(ce
->ce_mode
));
1259 assert(ce
->name
[ce
->ce_namelen
- 1] == '/');
1262 return ce
->ce_namelen
== info
->pathlen
+ p
->pathlen
+ 1 &&
1263 ce
->name
[info
->pathlen
- 1] == '/' &&
1264 !strncmp(ce
->name
, info
->traverse_path
, info
->pathlen
) &&
1265 !strncmp(ce
->name
+ info
->pathlen
, p
->path
, p
->pathlen
);
1266 return ce
->ce_namelen
== p
->pathlen
+ 1 &&
1267 !strncmp(ce
->name
, p
->path
, p
->pathlen
);
1270 static struct cache_entry
*find_cache_entry(struct traverse_info
*info
,
1271 const struct name_entry
*p
)
1274 int pos
= find_cache_pos(info
, p
->path
, p
->pathlen
);
1275 struct unpack_trees_options
*o
= info
->data
;
1278 return o
->src_index
->cache
[pos
];
1281 * Check for a sparse-directory entry named "path/".
1282 * Due to the input p->path not having a trailing
1283 * slash, the negative 'pos' value overshoots the
1284 * expected position, hence "-2" instead of "-1".
1288 if (pos
< 0 || pos
>= o
->src_index
->cache_nr
)
1292 * Due to lexicographic sorting and sparse directory
1293 * entries ending with a trailing slash, our path as a
1294 * sparse directory (e.g "subdir/") and our path as a
1295 * file (e.g. "subdir") might be separated by other
1296 * paths (e.g. "subdir-").
1299 struct cache_entry
*ce
= o
->src_index
->cache
[pos
];
1301 if (!skip_prefix(ce
->name
, info
->traverse_path
, &path
) ||
1302 strncmp(path
, p
->path
, p
->pathlen
) ||
1303 path
[p
->pathlen
] != '/')
1306 if (S_ISSPARSEDIR(ce
->ce_mode
) &&
1307 sparse_dir_matches_path(ce
, info
, p
))
1316 static void debug_path(struct traverse_info
*info
)
1319 debug_path(info
->prev
);
1320 if (*info
->prev
->name
)
1323 printf("%s", info
->name
);
1326 static void debug_name_entry(int i
, struct name_entry
*n
)
1328 printf("ent#%d %06o %s\n", i
,
1329 n
->path
? n
->mode
: 0,
1330 n
->path
? n
->path
: "(missing)");
1333 static void debug_unpack_callback(int n
,
1335 unsigned long dirmask
,
1336 struct name_entry
*names
,
1337 struct traverse_info
*info
)
1340 printf("* unpack mask %lu, dirmask %lu, cnt %d ",
1344 for (i
= 0; i
< n
; i
++)
1345 debug_name_entry(i
, names
+ i
);
1349 * Returns true if and only if the given cache_entry is a
1350 * sparse-directory entry that matches the given name_entry
1351 * from the tree walk at the given traverse_info.
1353 static int is_sparse_directory_entry(struct cache_entry
*ce
,
1354 struct name_entry
*name
,
1355 struct traverse_info
*info
)
1357 if (!ce
|| !name
|| !S_ISSPARSEDIR(ce
->ce_mode
))
1360 return sparse_dir_matches_path(ce
, info
, name
);
1363 static int unpack_sparse_callback(int n
, unsigned long mask
, unsigned long dirmask
, struct name_entry
*names
, struct traverse_info
*info
)
1365 struct cache_entry
*src
[MAX_UNPACK_TREES
+ 1] = { NULL
, };
1366 struct unpack_trees_options
*o
= info
->data
;
1372 * Unlike in 'unpack_callback', where src[0] is derived from the index when
1373 * merging, src[0] is a transient cache entry derived from the first tree
1374 * provided. Create the temporary entry as if it came from a non-sparse index.
1376 if (!is_null_oid(&names
[0].oid
)) {
1377 src
[0] = create_ce_entry(info
, &names
[0], 0,
1379 dirmask
& (1ul << 0));
1380 src
[0]->ce_flags
|= (CE_SKIP_WORKTREE
| CE_NEW_SKIP_WORKTREE
);
1384 * 'unpack_single_entry' assumes that src[0] is derived directly from
1385 * the index, rather than from an entry in 'names'. This is *not* true when
1386 * merging a sparse directory, in which case names[0] is the "index" source
1387 * entry. To match the expectations of 'unpack_single_entry', shift past the
1388 * "index" tree (i.e., names[0]) and adjust 'names', 'n', 'mask', and
1389 * 'dirmask' accordingly.
1391 ret
= unpack_single_entry(n
- 1, mask
>> 1, dirmask
>> 1, src
, names
+ 1, info
);
1394 discard_cache_entry(src
[0]);
1396 return ret
>= 0 ? mask
: -1;
1400 * Note that traverse_by_cache_tree() duplicates some logic in this function
1401 * without actually calling it. If you change the logic here you may need to
1402 * check and change there as well.
1404 static int unpack_callback(int n
, unsigned long mask
, unsigned long dirmask
, struct name_entry
*names
, struct traverse_info
*info
)
1406 struct cache_entry
*src
[MAX_UNPACK_TREES
+ 1] = { NULL
, };
1407 struct unpack_trees_options
*o
= info
->data
;
1408 const struct name_entry
*p
= names
;
1410 /* Find first entry with a real name (we could use "mask" too) */
1414 if (o
->debug_unpack
)
1415 debug_unpack_callback(n
, mask
, dirmask
, names
, info
);
1417 /* Are we supposed to look at the index too? */
1422 struct cache_entry
*ce
;
1424 if (o
->diff_index_cached
)
1425 ce
= next_cache_entry(o
, &hint
);
1427 ce
= find_cache_entry(info
, p
);
1431 cmp
= compare_entry(ce
, info
, p
);
1433 if (unpack_index_entry(ce
, o
) < 0)
1434 return unpack_failed(o
, NULL
);
1440 * If we skip unmerged index
1441 * entries, we'll skip this
1442 * entry *and* the tree
1443 * entries associated with it!
1445 if (o
->skip_unmerged
) {
1446 add_same_unmerged(ce
, o
);
1456 if (unpack_single_entry(n
, mask
, dirmask
, src
, names
, info
) < 0)
1459 if (o
->merge
&& src
[0]) {
1460 if (ce_stage(src
[0]))
1461 mark_ce_used_same_name(src
[0], o
);
1463 mark_ce_used(src
[0], o
);
1466 /* Now handle any directories.. */
1468 /* special case: "diff-index --cached" looking at a tree */
1469 if (o
->diff_index_cached
&&
1470 n
== 1 && dirmask
== 1 && S_ISDIR(names
->mode
)) {
1472 matches
= cache_tree_matches_traversal(o
->src_index
->cache_tree
,
1475 * Everything under the name matches; skip the
1476 * entire hierarchy. diff_index_cached codepath
1477 * special cases D/F conflicts in such a way that
1478 * it does not do any look-ahead, so this is safe.
1481 o
->cache_bottom
+= matches
;
1486 if (!is_sparse_directory_entry(src
[0], names
, info
) &&
1487 traverse_trees_recursive(n
, dirmask
, mask
& ~dirmask
,
1498 static int clear_ce_flags_1(struct index_state
*istate
,
1499 struct cache_entry
**cache
, int nr
,
1500 struct strbuf
*prefix
,
1501 int select_mask
, int clear_mask
,
1502 struct pattern_list
*pl
,
1503 enum pattern_match_result default_match
,
1506 /* Whole directory matching */
1507 static int clear_ce_flags_dir(struct index_state
*istate
,
1508 struct cache_entry
**cache
, int nr
,
1509 struct strbuf
*prefix
,
1511 int select_mask
, int clear_mask
,
1512 struct pattern_list
*pl
,
1513 enum pattern_match_result default_match
,
1516 struct cache_entry
**cache_end
;
1519 enum pattern_match_result ret
, orig_ret
;
1520 orig_ret
= path_matches_pattern_list(prefix
->buf
, prefix
->len
,
1521 basename
, &dtype
, pl
, istate
);
1523 strbuf_addch(prefix
, '/');
1525 /* If undecided, use matching result of parent dir in defval */
1526 if (orig_ret
== UNDECIDED
)
1527 ret
= default_match
;
1531 for (cache_end
= cache
; cache_end
!= cache
+ nr
; cache_end
++) {
1532 struct cache_entry
*ce
= *cache_end
;
1533 if (strncmp(ce
->name
, prefix
->buf
, prefix
->len
))
1537 if (pl
->use_cone_patterns
&& orig_ret
== MATCHED_RECURSIVE
) {
1538 struct cache_entry
**ce
= cache
;
1539 rc
= cache_end
- cache
;
1541 while (ce
< cache_end
) {
1542 (*ce
)->ce_flags
&= ~clear_mask
;
1545 } else if (pl
->use_cone_patterns
&& orig_ret
== NOT_MATCHED
) {
1546 rc
= cache_end
- cache
;
1548 rc
= clear_ce_flags_1(istate
, cache
, cache_end
- cache
,
1550 select_mask
, clear_mask
,
1555 strbuf_setlen(prefix
, prefix
->len
- 1);
1560 * Traverse the index, find every entry that matches according to
1561 * o->pl. Do "ce_flags &= ~clear_mask" on those entries. Return the
1562 * number of traversed entries.
1564 * If select_mask is non-zero, only entries whose ce_flags has on of
1565 * those bits enabled are traversed.
1567 * cache : pointer to an index entry
1568 * prefix_len : an offset to its path
1570 * The current path ("prefix") including the trailing '/' is
1571 * cache[0]->name[0..(prefix_len-1)]
1572 * Top level path has prefix_len zero.
1574 static int clear_ce_flags_1(struct index_state
*istate
,
1575 struct cache_entry
**cache
, int nr
,
1576 struct strbuf
*prefix
,
1577 int select_mask
, int clear_mask
,
1578 struct pattern_list
*pl
,
1579 enum pattern_match_result default_match
,
1582 struct cache_entry
**cache_end
= nr
? cache
+ nr
: cache
;
1585 * Process all entries that have the given prefix and meet
1586 * select_mask condition
1588 while(cache
!= cache_end
) {
1589 struct cache_entry
*ce
= *cache
;
1590 const char *name
, *slash
;
1592 enum pattern_match_result ret
;
1594 display_progress(istate
->progress
, progress_nr
);
1596 if (select_mask
&& !(ce
->ce_flags
& select_mask
)) {
1602 if (prefix
->len
&& strncmp(ce
->name
, prefix
->buf
, prefix
->len
))
1605 name
= ce
->name
+ prefix
->len
;
1606 slash
= strchr(name
, '/');
1608 /* If it's a directory, try whole directory match first */
1613 strbuf_add(prefix
, name
, len
);
1615 processed
= clear_ce_flags_dir(istate
, cache
, cache_end
- cache
,
1617 prefix
->buf
+ prefix
->len
- len
,
1618 select_mask
, clear_mask
,
1622 /* clear_c_f_dir eats a whole dir already? */
1625 progress_nr
+= processed
;
1626 strbuf_setlen(prefix
, prefix
->len
- len
);
1630 strbuf_addch(prefix
, '/');
1631 processed
= clear_ce_flags_1(istate
, cache
, cache_end
- cache
,
1633 select_mask
, clear_mask
, pl
,
1634 default_match
, progress_nr
);
1637 progress_nr
+= processed
;
1639 strbuf_setlen(prefix
, prefix
->len
- len
- 1);
1644 dtype
= ce_to_dtype(ce
);
1645 ret
= path_matches_pattern_list(ce
->name
,
1647 name
, &dtype
, pl
, istate
);
1648 if (ret
== UNDECIDED
)
1649 ret
= default_match
;
1650 if (ret
== MATCHED
|| ret
== MATCHED_RECURSIVE
)
1651 ce
->ce_flags
&= ~clear_mask
;
1656 display_progress(istate
->progress
, progress_nr
);
1657 return nr
- (cache_end
- cache
);
1660 static int clear_ce_flags(struct index_state
*istate
,
1661 int select_mask
, int clear_mask
,
1662 struct pattern_list
*pl
,
1665 static struct strbuf prefix
= STRBUF_INIT
;
1669 strbuf_reset(&prefix
);
1671 istate
->progress
= start_delayed_progress(
1672 _("Updating index flags"),
1675 xsnprintf(label
, sizeof(label
), "clear_ce_flags(0x%08lx,0x%08lx)",
1676 (unsigned long)select_mask
, (unsigned long)clear_mask
);
1677 trace2_region_enter("unpack_trees", label
, the_repository
);
1678 rval
= clear_ce_flags_1(istate
,
1682 select_mask
, clear_mask
,
1684 trace2_region_leave("unpack_trees", label
, the_repository
);
1686 stop_progress(&istate
->progress
);
1691 * Set/Clear CE_NEW_SKIP_WORKTREE according to $GIT_DIR/info/sparse-checkout
1693 static void mark_new_skip_worktree(struct pattern_list
*pl
,
1694 struct index_state
*istate
,
1695 int select_flag
, int skip_wt_flag
,
1701 * 1. Pretend the narrowest worktree: only unmerged entries
1704 for (i
= 0; i
< istate
->cache_nr
; i
++) {
1705 struct cache_entry
*ce
= istate
->cache
[i
];
1707 if (select_flag
&& !(ce
->ce_flags
& select_flag
))
1710 if (!ce_stage(ce
) && !(ce
->ce_flags
& CE_CONFLICTED
))
1711 ce
->ce_flags
|= skip_wt_flag
;
1713 ce
->ce_flags
&= ~skip_wt_flag
;
1717 * 2. Widen worktree according to sparse-checkout file.
1718 * Matched entries will have skip_wt_flag cleared (i.e. "in")
1720 clear_ce_flags(istate
, select_flag
, skip_wt_flag
, pl
, show_progress
);
1723 static void populate_from_existing_patterns(struct unpack_trees_options
*o
,
1724 struct pattern_list
*pl
)
1726 if (get_sparse_checkout_patterns(pl
) < 0)
1727 o
->skip_sparse_checkout
= 1;
1732 static void update_sparsity_for_prefix(const char *prefix
,
1733 struct index_state
*istate
)
1735 int prefix_len
= strlen(prefix
);
1736 struct strbuf ce_prefix
= STRBUF_INIT
;
1738 if (!istate
->sparse_index
)
1741 while (prefix_len
> 0 && prefix
[prefix_len
- 1] == '/')
1744 if (prefix_len
<= 0)
1745 BUG("Invalid prefix passed to update_sparsity_for_prefix");
1747 strbuf_grow(&ce_prefix
, prefix_len
+ 1);
1748 strbuf_add(&ce_prefix
, prefix
, prefix_len
);
1749 strbuf_addch(&ce_prefix
, '/');
1752 * If the prefix points to a sparse directory or a path inside a sparse
1753 * directory, the index should be expanded. This is accomplished in one
1755 * - if the prefix is inside a sparse directory, it will be expanded by
1756 * the 'ensure_full_index(...)' call in 'index_name_pos(...)'.
1757 * - if the prefix matches an existing sparse directory entry,
1758 * 'index_name_pos(...)' will return its index position, triggering
1759 * the 'ensure_full_index(...)' below.
1761 if (!path_in_cone_mode_sparse_checkout(ce_prefix
.buf
, istate
) &&
1762 index_name_pos(istate
, ce_prefix
.buf
, ce_prefix
.len
) >= 0)
1763 ensure_full_index(istate
);
1765 strbuf_release(&ce_prefix
);
1768 static int verify_absent(const struct cache_entry
*,
1769 enum unpack_trees_error_types
,
1770 struct unpack_trees_options
*);
1772 * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the
1773 * resulting index, -2 on failure to reflect the changes to the work tree.
1775 * CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally
1777 int unpack_trees(unsigned len
, struct tree_desc
*t
, struct unpack_trees_options
*o
)
1779 struct repository
*repo
= the_repository
;
1781 static struct cache_entry
*dfc
;
1782 struct pattern_list pl
;
1783 int free_pattern_list
= 0;
1784 struct dir_struct dir
= DIR_INIT
;
1786 if (o
->reset
== UNPACK_RESET_INVALID
)
1787 BUG("o->reset had a value of 1; should be UNPACK_TREES_*_UNTRACKED");
1789 if (len
> MAX_UNPACK_TREES
)
1790 die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES
);
1792 BUG("o->dir is for internal use only");
1794 trace_performance_enter();
1795 trace2_region_enter("unpack_trees", "unpack_trees", the_repository
);
1797 prepare_repo_settings(repo
);
1798 if (repo
->settings
.command_requires_full_index
) {
1799 ensure_full_index(o
->src_index
);
1800 ensure_full_index(o
->dst_index
);
1803 if (o
->reset
== UNPACK_RESET_OVERWRITE_UNTRACKED
&&
1804 o
->preserve_ignored
)
1805 BUG("UNPACK_RESET_OVERWRITE_UNTRACKED incompatible with preserved ignored files");
1807 if (!o
->preserve_ignored
) {
1809 o
->dir
->flags
|= DIR_SHOW_IGNORED
;
1810 setup_standard_excludes(o
->dir
);
1814 update_sparsity_for_prefix(o
->prefix
, o
->src_index
);
1816 if (!core_apply_sparse_checkout
|| !o
->update
)
1817 o
->skip_sparse_checkout
= 1;
1818 if (!o
->skip_sparse_checkout
&& !o
->pl
) {
1819 memset(&pl
, 0, sizeof(pl
));
1820 free_pattern_list
= 1;
1821 populate_from_existing_patterns(o
, &pl
);
1824 memset(&o
->result
, 0, sizeof(o
->result
));
1825 o
->result
.initialized
= 1;
1826 o
->result
.timestamp
.sec
= o
->src_index
->timestamp
.sec
;
1827 o
->result
.timestamp
.nsec
= o
->src_index
->timestamp
.nsec
;
1828 o
->result
.version
= o
->src_index
->version
;
1829 if (!o
->src_index
->split_index
) {
1830 o
->result
.split_index
= NULL
;
1831 } else if (o
->src_index
== o
->dst_index
) {
1833 * o->dst_index (and thus o->src_index) will be discarded
1834 * and overwritten with o->result at the end of this function,
1835 * so just use src_index's split_index to avoid having to
1838 o
->result
.split_index
= o
->src_index
->split_index
;
1839 o
->result
.split_index
->refcount
++;
1841 o
->result
.split_index
= init_split_index(&o
->result
);
1843 oidcpy(&o
->result
.oid
, &o
->src_index
->oid
);
1844 o
->merge_size
= len
;
1845 mark_all_ce_unused(o
->src_index
);
1847 o
->result
.fsmonitor_last_update
=
1848 xstrdup_or_null(o
->src_index
->fsmonitor_last_update
);
1851 * Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries
1853 if (!o
->skip_sparse_checkout
)
1854 mark_new_skip_worktree(o
->pl
, o
->src_index
, 0,
1855 CE_NEW_SKIP_WORKTREE
, o
->verbose_update
);
1858 dfc
= xcalloc(1, cache_entry_size(0));
1859 o
->df_conflict_entry
= dfc
;
1862 const char *prefix
= o
->prefix
? o
->prefix
: "";
1863 struct traverse_info info
;
1865 setup_traverse_info(&info
, prefix
);
1866 info
.fn
= unpack_callback
;
1868 info
.show_all_errors
= o
->show_all_errors
;
1869 info
.pathspec
= o
->pathspec
;
1875 * Unpack existing index entries that sort before the
1876 * prefix the tree is spliced into. Note that o->merge
1877 * is always true in this case.
1880 struct cache_entry
*ce
= next_cache_entry(o
, &hint
);
1883 if (ce_in_traverse_path(ce
, &info
))
1885 if (unpack_index_entry(ce
, o
) < 0)
1890 trace_performance_enter();
1891 trace2_region_enter("unpack_trees", "traverse_trees", the_repository
);
1892 ret
= traverse_trees(o
->src_index
, len
, t
, &info
);
1893 trace2_region_leave("unpack_trees", "traverse_trees", the_repository
);
1894 trace_performance_leave("traverse_trees");
1899 /* Any left-over entries in the index? */
1903 struct cache_entry
*ce
= next_cache_entry(o
, &hint
);
1906 if (unpack_index_entry(ce
, o
) < 0)
1910 mark_all_ce_unused(o
->src_index
);
1912 if (o
->trivial_merges_only
&& o
->nontrivial_merge
) {
1913 ret
= unpack_failed(o
, "Merge requires file-level merging");
1917 if (!o
->skip_sparse_checkout
) {
1919 * Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1
1920 * If they will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE
1921 * so apply_sparse_checkout() won't attempt to remove it from worktree
1923 mark_new_skip_worktree(o
->pl
, &o
->result
,
1924 CE_ADDED
, CE_SKIP_WORKTREE
| CE_NEW_SKIP_WORKTREE
,
1928 for (i
= 0; i
< o
->result
.cache_nr
; i
++) {
1929 struct cache_entry
*ce
= o
->result
.cache
[i
];
1932 * Entries marked with CE_ADDED in merged_entry() do not have
1933 * verify_absent() check (the check is effectively disabled
1934 * because CE_NEW_SKIP_WORKTREE is set unconditionally).
1936 * Do the real check now because we have had
1937 * correct CE_NEW_SKIP_WORKTREE
1939 if (ce
->ce_flags
& CE_ADDED
&&
1940 verify_absent(ce
, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN
, o
))
1943 if (apply_sparse_checkout(&o
->result
, ce
, o
))
1948 * Inability to sparsify or de-sparsify individual
1949 * paths is not an error, but just a warning.
1951 if (o
->show_all_errors
)
1952 display_warning_msgs(o
);
1957 ret
= check_updates(o
, &o
->result
) ? (-2) : 0;
1959 move_index_extensions(&o
->result
, o
->src_index
);
1961 if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0))
1962 cache_tree_verify(the_repository
, &o
->result
);
1963 if (!cache_tree_fully_valid(o
->result
.cache_tree
))
1964 cache_tree_update(&o
->result
,
1969 o
->result
.updated_workdir
= 1;
1970 discard_index(o
->dst_index
);
1971 *o
->dst_index
= o
->result
;
1973 discard_index(&o
->result
);
1975 o
->src_index
= NULL
;
1978 if (free_pattern_list
)
1979 clear_pattern_list(&pl
);
1984 trace2_region_leave("unpack_trees", "unpack_trees", the_repository
);
1985 trace_performance_leave("unpack_trees");
1989 if (o
->show_all_errors
)
1990 display_error_msgs(o
);
1991 mark_all_ce_unused(o
->src_index
);
1992 ret
= unpack_failed(o
, NULL
);
1993 if (o
->exiting_early
)
1999 * Update SKIP_WORKTREE bits according to sparsity patterns, and update
2000 * working directory to match.
2002 * CE_NEW_SKIP_WORKTREE is used internally.
2004 enum update_sparsity_result
update_sparsity(struct unpack_trees_options
*o
)
2006 enum update_sparsity_result ret
= UPDATE_SPARSITY_SUCCESS
;
2007 struct pattern_list pl
;
2009 unsigned old_show_all_errors
;
2010 int free_pattern_list
= 0;
2012 old_show_all_errors
= o
->show_all_errors
;
2013 o
->show_all_errors
= 1;
2016 if (!o
->update
|| o
->index_only
|| o
->skip_sparse_checkout
)
2017 BUG("update_sparsity() is for reflecting sparsity patterns in working directory");
2018 if (o
->src_index
!= o
->dst_index
|| o
->fn
)
2019 BUG("update_sparsity() called wrong");
2021 trace_performance_enter();
2023 /* If we weren't given patterns, use the recorded ones */
2025 memset(&pl
, 0, sizeof(pl
));
2026 free_pattern_list
= 1;
2027 populate_from_existing_patterns(o
, &pl
);
2028 if (o
->skip_sparse_checkout
)
2029 goto skip_sparse_checkout
;
2032 /* Set NEW_SKIP_WORKTREE on existing entries. */
2033 mark_all_ce_unused(o
->src_index
);
2034 mark_new_skip_worktree(o
->pl
, o
->src_index
, 0,
2035 CE_NEW_SKIP_WORKTREE
, o
->verbose_update
);
2037 /* Then loop over entries and update/remove as needed */
2038 ret
= UPDATE_SPARSITY_SUCCESS
;
2039 for (i
= 0; i
< o
->src_index
->cache_nr
; i
++) {
2040 struct cache_entry
*ce
= o
->src_index
->cache
[i
];
2044 /* -1 because for loop will increment by 1 */
2045 i
+= warn_conflicted_path(o
->src_index
, i
, o
) - 1;
2046 ret
= UPDATE_SPARSITY_WARNINGS
;
2050 if (apply_sparse_checkout(o
->src_index
, ce
, o
))
2051 ret
= UPDATE_SPARSITY_WARNINGS
;
2054 skip_sparse_checkout
:
2055 if (check_updates(o
, o
->src_index
))
2056 ret
= UPDATE_SPARSITY_WORKTREE_UPDATE_FAILURES
;
2058 display_warning_msgs(o
);
2059 o
->show_all_errors
= old_show_all_errors
;
2060 if (free_pattern_list
)
2061 clear_pattern_list(&pl
);
2062 trace_performance_leave("update_sparsity");
2066 /* Here come the merge functions */
2068 static int reject_merge(const struct cache_entry
*ce
,
2069 struct unpack_trees_options
*o
)
2071 return add_rejected_path(o
, ERROR_WOULD_OVERWRITE
, ce
->name
);
2074 static int same(const struct cache_entry
*a
, const struct cache_entry
*b
)
2080 if ((a
->ce_flags
| b
->ce_flags
) & CE_CONFLICTED
)
2082 return a
->ce_mode
== b
->ce_mode
&&
2083 oideq(&a
->oid
, &b
->oid
);
2088 * When a CE gets turned into an unmerged entry, we
2089 * want it to be up-to-date
2091 static int verify_uptodate_1(const struct cache_entry
*ce
,
2092 struct unpack_trees_options
*o
,
2093 enum unpack_trees_error_types error_type
)
2101 * CE_VALID and CE_SKIP_WORKTREE cheat, we better check again
2102 * if this entry is truly up-to-date because this file may be
2105 if ((ce
->ce_flags
& CE_VALID
) || ce_skip_worktree(ce
))
2106 ; /* keep checking */
2107 else if (o
->reset
|| ce_uptodate(ce
))
2110 if (!lstat(ce
->name
, &st
)) {
2111 int flags
= CE_MATCH_IGNORE_VALID
|CE_MATCH_IGNORE_SKIP_WORKTREE
;
2112 unsigned changed
= ie_match_stat(o
->src_index
, ce
, &st
, flags
);
2114 if (submodule_from_ce(ce
)) {
2115 int r
= check_submodule_move_head(ce
,
2116 "HEAD", oid_to_hex(&ce
->oid
), o
);
2118 return add_rejected_path(o
, error_type
, ce
->name
);
2125 * Historic default policy was to allow submodule to be out
2126 * of sync wrt the superproject index. If the submodule was
2127 * not considered interesting above, we don't care here.
2129 if (S_ISGITLINK(ce
->ce_mode
))
2134 if (errno
== ENOENT
)
2136 return add_rejected_path(o
, error_type
, ce
->name
);
2139 int verify_uptodate(const struct cache_entry
*ce
,
2140 struct unpack_trees_options
*o
)
2142 if (!o
->skip_sparse_checkout
&&
2143 (ce
->ce_flags
& CE_SKIP_WORKTREE
) &&
2144 (ce
->ce_flags
& CE_NEW_SKIP_WORKTREE
))
2146 return verify_uptodate_1(ce
, o
, ERROR_NOT_UPTODATE_FILE
);
2149 static int verify_uptodate_sparse(const struct cache_entry
*ce
,
2150 struct unpack_trees_options
*o
)
2152 return verify_uptodate_1(ce
, o
, WARNING_SPARSE_NOT_UPTODATE_FILE
);
2156 * TODO: We should actually invalidate o->result, not src_index [1].
2157 * But since cache tree and untracked cache both are not copied to
2158 * o->result until unpacking is complete, we invalidate them on
2159 * src_index instead with the assumption that they will be copied to
2160 * dst_index at the end.
2162 * [1] src_index->cache_tree is also used in unpack_callback() so if
2163 * we invalidate o->result, we need to update it to use
2164 * o->result.cache_tree as well.
2166 static void invalidate_ce_path(const struct cache_entry
*ce
,
2167 struct unpack_trees_options
*o
)
2171 cache_tree_invalidate_path(o
->src_index
, ce
->name
);
2172 untracked_cache_invalidate_path(o
->src_index
, ce
->name
, 1);
2176 * Check that checking out ce->sha1 in subdir ce->name is not
2177 * going to overwrite any working files.
2179 static int verify_clean_submodule(const char *old_sha1
,
2180 const struct cache_entry
*ce
,
2181 struct unpack_trees_options
*o
)
2183 if (!submodule_from_ce(ce
))
2186 return check_submodule_move_head(ce
, old_sha1
,
2187 oid_to_hex(&ce
->oid
), o
);
2190 static int verify_clean_subdirectory(const struct cache_entry
*ce
,
2191 struct unpack_trees_options
*o
)
2194 * we are about to extract "ce->name"; we would not want to lose
2195 * anything in the existing directory there.
2199 struct dir_struct d
;
2203 if (S_ISGITLINK(ce
->ce_mode
)) {
2204 struct object_id oid
;
2205 int sub_head
= resolve_gitlink_ref(ce
->name
, "HEAD", &oid
);
2207 * If we are not going to update the submodule, then
2210 if (!sub_head
&& oideq(&oid
, &ce
->oid
))
2212 return verify_clean_submodule(sub_head
? NULL
: oid_to_hex(&oid
),
2217 * First let's make sure we do not have a local modification
2218 * in that directory.
2220 namelen
= ce_namelen(ce
);
2221 for (i
= locate_in_src_index(ce
, o
);
2222 i
< o
->src_index
->cache_nr
;
2224 struct cache_entry
*ce2
= o
->src_index
->cache
[i
];
2225 int len
= ce_namelen(ce2
);
2226 if (len
< namelen
||
2227 strncmp(ce
->name
, ce2
->name
, namelen
) ||
2228 ce2
->name
[namelen
] != '/')
2231 * ce2->name is an entry in the subdirectory to be
2234 if (!ce_stage(ce2
)) {
2235 if (verify_uptodate(ce2
, o
))
2237 add_entry(o
, ce2
, CE_REMOVE
, 0);
2238 invalidate_ce_path(ce
, o
);
2239 mark_ce_used(ce2
, o
);
2244 /* Do not lose a locally present file that is not ignored. */
2245 pathbuf
= xstrfmt("%.*s/", namelen
, ce
->name
);
2247 memset(&d
, 0, sizeof(d
));
2249 d
.exclude_per_dir
= o
->dir
->exclude_per_dir
;
2250 i
= read_directory(&d
, o
->src_index
, pathbuf
, namelen
+1, NULL
);
2254 return add_rejected_path(o
, ERROR_NOT_UPTODATE_DIR
, ce
->name
);
2256 /* Do not lose startup_info->original_cwd */
2257 if (startup_info
->original_cwd
&&
2258 !strcmp(startup_info
->original_cwd
, ce
->name
))
2259 return add_rejected_path(o
, ERROR_CWD_IN_THE_WAY
, ce
->name
);
2265 * This gets called when there was no index entry for the tree entry 'dst',
2266 * but we found a file in the working tree that 'lstat()' said was fine,
2267 * and we're on a case-insensitive filesystem.
2269 * See if we can find a case-insensitive match in the index that also
2270 * matches the stat information, and assume it's that other file!
2272 static int icase_exists(struct unpack_trees_options
*o
, const char *name
, int len
, struct stat
*st
)
2274 const struct cache_entry
*src
;
2276 src
= index_file_exists(o
->src_index
, name
, len
, 1);
2277 return src
&& !ie_match_stat(o
->src_index
, src
, st
, CE_MATCH_IGNORE_VALID
|CE_MATCH_IGNORE_SKIP_WORKTREE
);
2280 enum absent_checking_type
{
2282 ABSENT_ANY_DIRECTORY
2285 static int check_ok_to_remove(const char *name
, int len
, int dtype
,
2286 const struct cache_entry
*ce
, struct stat
*st
,
2287 enum unpack_trees_error_types error_type
,
2288 enum absent_checking_type absent_type
,
2289 struct unpack_trees_options
*o
)
2291 const struct cache_entry
*result
;
2294 * It may be that the 'lstat()' succeeded even though
2295 * target 'ce' was absent, because there is an old
2296 * entry that is different only in case..
2298 * Ignore that lstat() if it matches.
2300 if (ignore_case
&& icase_exists(o
, name
, len
, st
))
2304 is_excluded(o
->dir
, o
->src_index
, name
, &dtype
))
2306 * ce->name is explicitly excluded, so it is Ok to
2310 if (S_ISDIR(st
->st_mode
)) {
2312 * We are checking out path "foo" and
2313 * found "foo/." in the working tree.
2314 * This is tricky -- if we have modified
2315 * files that are in "foo/" we would lose
2318 if (verify_clean_subdirectory(ce
, o
) < 0)
2323 /* If we only care about directories, then we can remove */
2324 if (absent_type
== ABSENT_ANY_DIRECTORY
)
2328 * The previous round may already have decided to
2329 * delete this path, which is in a subdirectory that
2330 * is being replaced with a blob.
2332 result
= index_file_exists(&o
->result
, name
, len
, 0);
2334 if (result
->ce_flags
& CE_REMOVE
)
2338 return add_rejected_path(o
, error_type
, name
);
2342 * We do not want to remove or overwrite a working tree file that
2343 * is not tracked, unless it is ignored.
2345 static int verify_absent_1(const struct cache_entry
*ce
,
2346 enum unpack_trees_error_types error_type
,
2347 enum absent_checking_type absent_type
,
2348 struct unpack_trees_options
*o
)
2353 if (o
->index_only
|| !o
->update
)
2356 if (o
->reset
== UNPACK_RESET_OVERWRITE_UNTRACKED
) {
2357 /* Avoid nuking startup_info->original_cwd... */
2358 if (startup_info
->original_cwd
&&
2359 !strcmp(startup_info
->original_cwd
, ce
->name
))
2360 return add_rejected_path(o
, ERROR_CWD_IN_THE_WAY
,
2362 /* ...but nuke anything else. */
2366 len
= check_leading_path(ce
->name
, ce_namelen(ce
), 0);
2373 path
= xmemdupz(ce
->name
, len
);
2374 if (lstat(path
, &st
))
2375 ret
= error_errno("cannot stat '%s'", path
);
2377 if (submodule_from_ce(ce
))
2378 ret
= check_submodule_move_head(ce
,
2379 oid_to_hex(&ce
->oid
),
2382 ret
= check_ok_to_remove(path
, len
, DT_UNKNOWN
, NULL
,
2388 } else if (lstat(ce
->name
, &st
)) {
2389 if (errno
!= ENOENT
)
2390 return error_errno("cannot stat '%s'", ce
->name
);
2393 if (submodule_from_ce(ce
))
2394 return check_submodule_move_head(ce
, oid_to_hex(&ce
->oid
),
2397 return check_ok_to_remove(ce
->name
, ce_namelen(ce
),
2398 ce_to_dtype(ce
), ce
, &st
,
2399 error_type
, absent_type
, o
);
2403 static int verify_absent(const struct cache_entry
*ce
,
2404 enum unpack_trees_error_types error_type
,
2405 struct unpack_trees_options
*o
)
2407 if (!o
->skip_sparse_checkout
&& (ce
->ce_flags
& CE_NEW_SKIP_WORKTREE
))
2409 return verify_absent_1(ce
, error_type
, COMPLETELY_ABSENT
, o
);
2412 static int verify_absent_if_directory(const struct cache_entry
*ce
,
2413 enum unpack_trees_error_types error_type
,
2414 struct unpack_trees_options
*o
)
2416 if (!o
->skip_sparse_checkout
&& (ce
->ce_flags
& CE_NEW_SKIP_WORKTREE
))
2418 return verify_absent_1(ce
, error_type
, ABSENT_ANY_DIRECTORY
, o
);
2421 static int verify_absent_sparse(const struct cache_entry
*ce
,
2422 enum unpack_trees_error_types error_type
,
2423 struct unpack_trees_options
*o
)
2425 return verify_absent_1(ce
, error_type
, COMPLETELY_ABSENT
, o
);
2428 static int merged_entry(const struct cache_entry
*ce
,
2429 const struct cache_entry
*old
,
2430 struct unpack_trees_options
*o
)
2432 int update
= CE_UPDATE
;
2433 struct cache_entry
*merge
= dup_cache_entry(ce
, &o
->result
);
2437 * New index entries. In sparse checkout, the following
2438 * verify_absent() will be delayed until after
2439 * traverse_trees() finishes in unpack_trees(), then:
2441 * - CE_NEW_SKIP_WORKTREE will be computed correctly
2442 * - verify_absent() be called again, this time with
2443 * correct CE_NEW_SKIP_WORKTREE
2445 * verify_absent() call here does nothing in sparse
2446 * checkout (i.e. o->skip_sparse_checkout == 0)
2449 merge
->ce_flags
|= CE_NEW_SKIP_WORKTREE
;
2451 if (verify_absent(merge
,
2452 ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN
, o
)) {
2453 discard_cache_entry(merge
);
2456 invalidate_ce_path(merge
, o
);
2458 if (submodule_from_ce(ce
) && file_exists(ce
->name
)) {
2459 int ret
= check_submodule_move_head(ce
, NULL
,
2460 oid_to_hex(&ce
->oid
),
2466 } else if (!(old
->ce_flags
& CE_CONFLICTED
)) {
2468 * See if we can re-use the old CE directly?
2469 * That way we get the uptodate stat info.
2471 * This also removes the UPDATE flag on a match; otherwise
2472 * we will end up overwriting local changes in the work tree.
2474 if (same(old
, merge
)) {
2475 copy_cache_entry(merge
, old
);
2478 if (verify_uptodate(old
, o
)) {
2479 discard_cache_entry(merge
);
2482 /* Migrate old flags over */
2483 update
|= old
->ce_flags
& (CE_SKIP_WORKTREE
| CE_NEW_SKIP_WORKTREE
);
2484 invalidate_ce_path(old
, o
);
2487 if (submodule_from_ce(ce
) && file_exists(ce
->name
)) {
2488 int ret
= check_submodule_move_head(ce
, oid_to_hex(&old
->oid
),
2489 oid_to_hex(&ce
->oid
),
2496 * Previously unmerged entry left as an existence
2497 * marker by read_index_unmerged();
2499 if (verify_absent_if_directory(merge
,
2500 ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN
, o
)) {
2501 discard_cache_entry(merge
);
2505 invalidate_ce_path(old
, o
);
2508 if (do_add_entry(o
, merge
, update
, CE_STAGEMASK
) < 0)
2513 static int merged_sparse_dir(const struct cache_entry
* const *src
, int n
,
2514 struct unpack_trees_options
*o
)
2516 struct tree_desc t
[MAX_UNPACK_TREES
+ 1];
2517 void * tree_bufs
[MAX_UNPACK_TREES
+ 1];
2518 struct traverse_info info
;
2522 * Create the tree traversal information for traversing into *only* the
2525 setup_traverse_info(&info
, src
[0]->name
);
2526 info
.fn
= unpack_sparse_callback
;
2528 info
.show_all_errors
= o
->show_all_errors
;
2529 info
.pathspec
= o
->pathspec
;
2531 /* Get the tree descriptors of the sparse directory in each of the merging trees */
2532 for (i
= 0; i
< n
; i
++)
2533 tree_bufs
[i
] = fill_tree_descriptor(o
->src_index
->repo
, &t
[i
],
2534 src
[i
] && !is_null_oid(&src
[i
]->oid
) ? &src
[i
]->oid
: NULL
);
2536 ret
= traverse_trees(o
->src_index
, n
, t
, &info
);
2538 for (i
= 0; i
< n
; i
++)
2544 static int deleted_entry(const struct cache_entry
*ce
,
2545 const struct cache_entry
*old
,
2546 struct unpack_trees_options
*o
)
2548 /* Did it exist in the index? */
2550 if (verify_absent(ce
, ERROR_WOULD_LOSE_UNTRACKED_REMOVED
, o
))
2553 } else if (verify_absent_if_directory(ce
, ERROR_WOULD_LOSE_UNTRACKED_REMOVED
, o
)) {
2557 if (!(old
->ce_flags
& CE_CONFLICTED
) && verify_uptodate(old
, o
))
2559 add_entry(o
, ce
, CE_REMOVE
, 0);
2560 invalidate_ce_path(ce
, o
);
2564 static int keep_entry(const struct cache_entry
*ce
,
2565 struct unpack_trees_options
*o
)
2567 add_entry(o
, ce
, 0, 0);
2569 invalidate_ce_path(ce
, o
);
2574 static void show_stage_entry(FILE *o
,
2575 const char *label
, const struct cache_entry
*ce
)
2578 fprintf(o
, "%s (missing)\n", label
);
2580 fprintf(o
, "%s%06o %s %d\t%s\n",
2583 oid_to_hex(&ce
->oid
),
2589 int threeway_merge(const struct cache_entry
* const *stages
,
2590 struct unpack_trees_options
*o
)
2592 const struct cache_entry
*index
;
2593 const struct cache_entry
*head
;
2594 const struct cache_entry
*remote
= stages
[o
->head_idx
+ 1];
2597 int remote_match
= 0;
2599 int df_conflict_head
= 0;
2600 int df_conflict_remote
= 0;
2602 int any_anc_missing
= 0;
2603 int no_anc_exists
= 1;
2606 for (i
= 1; i
< o
->head_idx
; i
++) {
2607 if (!stages
[i
] || stages
[i
] == o
->df_conflict_entry
)
2608 any_anc_missing
= 1;
2614 head
= stages
[o
->head_idx
];
2616 if (head
== o
->df_conflict_entry
) {
2617 df_conflict_head
= 1;
2621 if (remote
== o
->df_conflict_entry
) {
2622 df_conflict_remote
= 1;
2627 * First, if there's a #16 situation, note that to prevent #13
2630 if (!same(remote
, head
)) {
2631 for (i
= 1; i
< o
->head_idx
; i
++) {
2632 if (same(stages
[i
], head
)) {
2635 if (same(stages
[i
], remote
)) {
2642 * We start with cases where the index is allowed to match
2643 * something other than the head: #14(ALT) and #2ALT, where it
2644 * is permitted to match the result instead.
2646 /* #14, #14ALT, #2ALT */
2647 if (remote
&& !df_conflict_head
&& head_match
&& !remote_match
) {
2648 if (index
&& !same(index
, remote
) && !same(index
, head
)) {
2649 if (S_ISSPARSEDIR(index
->ce_mode
))
2650 return merged_sparse_dir(stages
, 4, o
);
2652 return reject_merge(index
, o
);
2654 return merged_entry(remote
, index
, o
);
2657 * If we have an entry in the index cache, then we want to
2658 * make sure that it matches head.
2660 if (index
&& !same(index
, head
)) {
2661 if (S_ISSPARSEDIR(index
->ce_mode
))
2662 return merged_sparse_dir(stages
, 4, o
);
2664 return reject_merge(index
, o
);
2669 if (same(head
, remote
))
2670 return merged_entry(head
, index
, o
);
2672 if (!df_conflict_remote
&& remote_match
&& !head_match
)
2673 return merged_entry(head
, index
, o
);
2677 if (!head
&& !remote
&& any_anc_missing
)
2681 * Under the "aggressive" rule, we resolve mostly trivial
2682 * cases that we historically had git-merge-one-file resolve.
2684 if (o
->aggressive
) {
2685 int head_deleted
= !head
;
2686 int remote_deleted
= !remote
;
2687 const struct cache_entry
*ce
= NULL
;
2696 for (i
= 1; i
< o
->head_idx
; i
++) {
2697 if (stages
[i
] && stages
[i
] != o
->df_conflict_entry
) {
2706 * Deleted in one and unchanged in the other.
2708 if ((head_deleted
&& remote_deleted
) ||
2709 (head_deleted
&& remote
&& remote_match
) ||
2710 (remote_deleted
&& head
&& head_match
)) {
2712 return deleted_entry(index
, index
, o
);
2713 if (ce
&& !head_deleted
) {
2714 if (verify_absent(ce
, ERROR_WOULD_LOSE_UNTRACKED_REMOVED
, o
))
2720 * Added in both, identically.
2722 if (no_anc_exists
&& head
&& remote
&& same(head
, remote
))
2723 return merged_entry(head
, index
, o
);
2727 /* Handle "no merge" cases (see t/t1000-read-tree-m-3way.sh) */
2730 * If we've reached the "no merge" cases and we're merging
2731 * a sparse directory, we may have an "edit/edit" conflict that
2732 * can be resolved by individually merging directory contents.
2734 if (S_ISSPARSEDIR(index
->ce_mode
))
2735 return merged_sparse_dir(stages
, 4, o
);
2738 * If we're not merging a sparse directory, ensure the index is
2739 * up-to-date to avoid files getting overwritten with conflict
2742 if (verify_uptodate(index
, o
))
2746 o
->nontrivial_merge
= 1;
2748 /* #2, #3, #4, #6, #7, #9, #10, #11. */
2750 if (!head_match
|| !remote_match
) {
2751 for (i
= 1; i
< o
->head_idx
; i
++) {
2752 if (stages
[i
] && stages
[i
] != o
->df_conflict_entry
) {
2753 keep_entry(stages
[i
], o
);
2761 fprintf(stderr
, "read-tree: warning #16 detected\n");
2762 show_stage_entry(stderr
, "head ", stages
[head_match
]);
2763 show_stage_entry(stderr
, "remote ", stages
[remote_match
]);
2766 if (head
) { count
+= keep_entry(head
, o
); }
2767 if (remote
) { count
+= keep_entry(remote
, o
); }
2774 * The rule is to "carry forward" what is in the index without losing
2775 * information across a "fast-forward", favoring a successful merge
2776 * over a merge failure when it makes sense. For details of the
2777 * "carry forward" rule, please see <Documentation/git-read-tree.txt>.
2780 int twoway_merge(const struct cache_entry
* const *src
,
2781 struct unpack_trees_options
*o
)
2783 const struct cache_entry
*current
= src
[0];
2784 const struct cache_entry
*oldtree
= src
[1];
2785 const struct cache_entry
*newtree
= src
[2];
2787 if (o
->merge_size
!= 2)
2788 return error("Cannot do a twoway merge of %d trees",
2791 if (oldtree
== o
->df_conflict_entry
)
2793 if (newtree
== o
->df_conflict_entry
)
2797 if (current
->ce_flags
& CE_CONFLICTED
) {
2798 if (same(oldtree
, newtree
) || o
->reset
) {
2800 return deleted_entry(current
, current
, o
);
2802 return merged_entry(newtree
, current
, o
);
2804 return reject_merge(current
, o
);
2805 } else if ((!oldtree
&& !newtree
) || /* 4 and 5 */
2806 (!oldtree
&& newtree
&&
2807 same(current
, newtree
)) || /* 6 and 7 */
2808 (oldtree
&& newtree
&&
2809 same(oldtree
, newtree
)) || /* 14 and 15 */
2810 (oldtree
&& newtree
&&
2811 !same(oldtree
, newtree
) && /* 18 and 19 */
2812 same(current
, newtree
))) {
2813 return keep_entry(current
, o
);
2814 } else if (oldtree
&& !newtree
&& same(current
, oldtree
)) {
2816 return deleted_entry(oldtree
, current
, o
);
2817 } else if (oldtree
&& newtree
&&
2818 same(current
, oldtree
) && !same(current
, newtree
)) {
2820 return merged_entry(newtree
, current
, o
);
2821 } else if (current
&& !oldtree
&& newtree
&&
2822 S_ISSPARSEDIR(current
->ce_mode
) != S_ISSPARSEDIR(newtree
->ce_mode
) &&
2823 ce_stage(current
) == 0) {
2825 * This case is a directory/file conflict across the sparse-index
2826 * boundary. When we are changing from one path to another via
2827 * 'git checkout', then we want to replace one entry with another
2828 * via merged_entry(). If there are staged changes, then we should
2829 * reject the merge instead.
2831 return merged_entry(newtree
, current
, o
);
2832 } else if (S_ISSPARSEDIR(current
->ce_mode
)) {
2834 * The sparse directories differ, but we don't know whether that's
2835 * because of two different files in the directory being modified
2836 * (can be trivially merged) or if there is a real file conflict.
2837 * Merge the sparse directory by OID to compare file-by-file.
2839 return merged_sparse_dir(src
, 3, o
);
2841 return reject_merge(current
, o
);
2844 if (oldtree
&& !o
->initial_checkout
) {
2846 * deletion of the path was staged;
2848 if (same(oldtree
, newtree
))
2850 return reject_merge(oldtree
, o
);
2852 return merged_entry(newtree
, current
, o
);
2854 return deleted_entry(oldtree
, current
, o
);
2860 * Keep the index entries at stage0, collapse stage1 but make sure
2861 * stage0 does not have anything there.
2863 int bind_merge(const struct cache_entry
* const *src
,
2864 struct unpack_trees_options
*o
)
2866 const struct cache_entry
*old
= src
[0];
2867 const struct cache_entry
*a
= src
[1];
2869 if (o
->merge_size
!= 1)
2870 return error("Cannot do a bind merge of %d trees",
2873 return o
->quiet
? -1 :
2874 error(ERRORMSG(o
, ERROR_BIND_OVERLAP
),
2875 super_prefixed(a
->name
),
2876 super_prefixed(old
->name
));
2878 return keep_entry(old
, o
);
2880 return merged_entry(a
, NULL
, o
);
2887 * - take the stat information from stage0, take the data from stage1
2889 int oneway_merge(const struct cache_entry
* const *src
,
2890 struct unpack_trees_options
*o
)
2892 const struct cache_entry
*old
= src
[0];
2893 const struct cache_entry
*a
= src
[1];
2895 if (o
->merge_size
!= 1)
2896 return error("Cannot do a oneway merge of %d trees",
2899 if (!a
|| a
== o
->df_conflict_entry
)
2900 return deleted_entry(old
, old
, o
);
2902 if (old
&& same(old
, a
)) {
2904 if (o
->reset
&& o
->update
&& !ce_uptodate(old
) && !ce_skip_worktree(old
) &&
2905 !(old
->ce_flags
& CE_FSMONITOR_VALID
)) {
2907 if (lstat(old
->name
, &st
) ||
2908 ie_match_stat(o
->src_index
, old
, &st
, CE_MATCH_IGNORE_VALID
|CE_MATCH_IGNORE_SKIP_WORKTREE
))
2909 update
|= CE_UPDATE
;
2911 if (o
->update
&& S_ISGITLINK(old
->ce_mode
) &&
2912 should_update_submodules() && !verify_uptodate(old
, o
))
2913 update
|= CE_UPDATE
;
2914 add_entry(o
, old
, update
, CE_STAGEMASK
);
2917 return merged_entry(a
, old
, o
);
2921 * Merge worktree and untracked entries in a stash entry.
2923 * Ignore all index entries. Collapse remaining trees but make sure that they
2924 * don't have any conflicting files.
2926 int stash_worktree_untracked_merge(const struct cache_entry
* const *src
,
2927 struct unpack_trees_options
*o
)
2929 const struct cache_entry
*worktree
= src
[1];
2930 const struct cache_entry
*untracked
= src
[2];
2932 if (o
->merge_size
!= 2)
2933 BUG("invalid merge_size: %d", o
->merge_size
);
2935 if (worktree
&& untracked
)
2936 return error(_("worktree and untracked commit have duplicate entries: %s"),
2937 super_prefixed(worktree
->name
));
2939 return merged_entry(worktree
? worktree
: untracked
, NULL
, o
);