Fifth batch for 2.13
[git/git.git] / refs.h
CommitLineData
95fc7512
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1#ifndef REFS_H
2#define REFS_H
3
fb58c8d5
MH
4/*
5 * Resolve a reference, recursively following symbolic refererences.
6 *
7 * Store the referred-to object's name in sha1 and return the name of
8 * the non-symbolic reference that ultimately pointed at it. The
9 * return value, if not NULL, is a pointer into either a static buffer
10 * or the input ref.
11 *
12 * If the reference cannot be resolved to an object, the behavior
13 * depends on the RESOLVE_REF_READING flag:
14 *
15 * - If RESOLVE_REF_READING is set, return NULL.
16 *
17 * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of
18 * the last reference name in the chain, which will either be a non-symbolic
19 * reference or an undefined reference. If this is a prelude to
20 * "writing" to the ref, the return value is the name of the ref
21 * that will actually be created or changed.
22 *
23 * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one
24 * level of symbolic reference. The value stored in sha1 for a symbolic
25 * reference will always be null_sha1 in this case, and the return
26 * value is the reference that the symref refers to directly.
27 *
28 * If flags is non-NULL, set the value that it points to the
29 * combination of REF_ISPACKED (if the reference was found among the
30 * packed references), REF_ISSYMREF (if the initial reference was a
31 * symbolic reference), REF_BAD_NAME (if the reference name is ill
32 * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN
33 * (if the ref is malformed or has a bad name). See refs.h for more detail
34 * on each flag.
35 *
36 * If ref is not a properly-formatted, normalized reference, return
37 * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
38 * give up and return NULL.
39 *
40 * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their
41 * name is invalid according to git-check-ref-format(1). If the name
42 * is bad then the value stored in sha1 will be null_sha1 and the two
43 * flags REF_ISBROKEN and REF_BAD_NAME will be set.
44 *
45 * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/
46 * directory and do not consist of all caps and underscores cannot be
47 * resolved. The function returns NULL for such ref names.
48 * Caps and underscores refers to the special refs, such as HEAD,
49 * FETCH_HEAD and friends, that all live outside of the refs/ directory.
50 */
51#define RESOLVE_REF_READING 0x01
52#define RESOLVE_REF_NO_RECURSE 0x02
53#define RESOLVE_REF_ALLOW_BAD_NAME 0x04
54
1354c9b2
MH
55const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
56 unsigned char *sha1, int *flags);
fb58c8d5 57
1354c9b2
MH
58char *resolve_refdup(const char *refname, int resolve_flags,
59 unsigned char *sha1, int *flags);
fb58c8d5 60
1354c9b2
MH
61int read_ref_full(const char *refname, int resolve_flags,
62 unsigned char *sha1, int *flags);
63int read_ref(const char *refname, unsigned char *sha1);
fb58c8d5 64
1354c9b2 65int ref_exists(const char *refname);
fb58c8d5 66
341fb286
CW
67int should_autocreate_reflog(const char *refname);
68
1354c9b2 69int is_branch(const char *refname);
fb58c8d5 70
6fb5acfd
DT
71extern int refs_init_db(struct strbuf *err);
72
fb58c8d5
MH
73/*
74 * If refname is a non-symbolic reference that refers to a tag object,
75 * and the tag can be (recursively) dereferenced to a non-tag object,
76 * store the SHA1 of the referred-to object to sha1 and return 0. If
77 * any of these conditions are not met, return a non-zero value.
78 * Symbolic references are considered unpeelable, even if they
79 * ultimately resolve to a peelable tag.
80 */
1354c9b2 81int peel_ref(const char *refname, unsigned char *sha1);
fb58c8d5
MH
82
83/**
a8355bb7
MH
84 * Resolve refname in the nested "gitlink" repository in the specified
85 * submodule (which must be non-NULL). If the resolution is
86 * successful, return 0 and set sha1 to the name of the object;
87 * otherwise, return a non-zero value.
fb58c8d5 88 */
a8355bb7 89int resolve_gitlink_ref(const char *submodule, const char *refname,
1354c9b2 90 unsigned char *sha1);
fb58c8d5
MH
91
92/*
93 * Return true iff abbrev_name is a possible abbreviation for
94 * full_name according to the rules defined by ref_rev_parse_rules in
95 * refs.c.
96 */
1354c9b2 97int refname_match(const char *abbrev_name, const char *full_name);
fb58c8d5 98
a460ea4a 99int expand_ref(const char *str, int len, unsigned char *sha1, char **ref);
1354c9b2
MH
100int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
101int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
fb58c8d5 102
b416af5b
RS
103/*
104 * A ref_transaction represents a collection of ref updates
105 * that should succeed or fail together.
106 *
107 * Calling sequence
108 * ----------------
109 * - Allocate and initialize a `struct ref_transaction` by calling
110 * `ref_transaction_begin()`.
111 *
112 * - List intended ref updates by calling functions like
113 * `ref_transaction_update()` and `ref_transaction_create()`.
114 *
115 * - Call `ref_transaction_commit()` to execute the transaction.
116 * If this succeeds, the ref updates will have taken place and
117 * the transaction cannot be rolled back.
118 *
49386868
DT
119 * - Instead of `ref_transaction_commit`, use
120 * `initial_ref_transaction_commit()` if the ref database is known
121 * to be empty (e.g. during clone). This is likely to be much
122 * faster.
123 *
b416af5b
RS
124 * - At any time call `ref_transaction_free()` to discard the
125 * transaction and free associated resources. In particular,
126 * this rolls back the transaction if it has not been
127 * successfully committed.
128 *
129 * Error handling
130 * --------------
131 *
132 * On error, transaction functions append a message about what
133 * went wrong to the 'err' argument. The message mentions what
134 * ref was being updated (if any) when the error occurred so it
135 * can be passed to 'die' or 'error' as-is.
136 *
137 * The message is appended to err without first clearing err.
138 * err will not be '\n' terminated.
49386868
DT
139 *
140 * Caveats
141 * -------
142 *
143 * Note that no locks are taken, and no refs are read, until
144 * `ref_transaction_commit` is called. So `ref_transaction_verify`
145 * won't report a verification failure until the commit is attempted.
b416af5b 146 */
caa4046c
MH
147struct ref_transaction;
148
89df9c84 149/*
3bc581b9
MH
150 * Bit values set in the flags argument passed to each_ref_fn() and
151 * stored in ref_iterator::flags. Other bits are for internal use
152 * only:
89df9c84
MH
153 */
154
155/* Reference is a symbolic reference. */
98ac34b2 156#define REF_ISSYMREF 0x01
89df9c84
MH
157
158/* Reference is a packed reference. */
98ac34b2 159#define REF_ISPACKED 0x02
89df9c84
MH
160
161/*
162 * Reference cannot be resolved to an object name: dangling symbolic
d0f810f0
RS
163 * reference (directly or indirectly), corrupt reference file,
164 * reference exists but name is bad, or symbolic reference refers to
165 * ill-formatted reference name.
89df9c84 166 */
98ac34b2 167#define REF_ISBROKEN 0x04
f4204ab9 168
d0f810f0
RS
169/*
170 * Reference name is not well formed.
171 *
172 * See git-check-ref-format(1) for the definition of well formed ref names.
173 */
174#define REF_BAD_NAME 0x08
175
8a65ff76 176/*
4f78c24c
MH
177 * The signature for the callback function for the for_each_*()
178 * functions below. The memory pointed to by the refname and sha1
179 * arguments is only guaranteed to be valid for the duration of a
180 * single callback invocation.
181 */
182typedef int each_ref_fn(const char *refname,
2b2a5be3
MH
183 const struct object_id *oid, int flags, void *cb_data);
184
4f78c24c
MH
185/*
186 * The following functions invoke the specified callback function for
187 * each reference indicated. If the function ever returns a nonzero
188 * value, stop the iteration and return that value. Please note that
189 * it is not safe to modify references while an iteration is in
190 * progress, unless the same callback function invocation that
191 * modifies the reference also returns a nonzero value to immediately
192 * stop the iteration.
8a65ff76 193 */
1354c9b2
MH
194int head_ref(each_ref_fn fn, void *cb_data);
195int for_each_ref(each_ref_fn fn, void *cb_data);
196int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data);
197int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data,
198 unsigned int broken);
199int for_each_tag_ref(each_ref_fn fn, void *cb_data);
200int for_each_branch_ref(each_ref_fn fn, void *cb_data);
201int for_each_remote_ref(each_ref_fn fn, void *cb_data);
202int for_each_replace_ref(each_ref_fn fn, void *cb_data);
203int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data);
204int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
205 const char *prefix, void *cb_data);
206
207int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data);
208int for_each_ref_submodule(const char *submodule,
209 each_ref_fn fn, void *cb_data);
210int for_each_ref_in_submodule(const char *submodule, const char *prefix,
9ef6aeb0 211 each_ref_fn fn, void *cb_data);
1354c9b2
MH
212int for_each_tag_ref_submodule(const char *submodule,
213 each_ref_fn fn, void *cb_data);
214int for_each_branch_ref_submodule(const char *submodule,
215 each_ref_fn fn, void *cb_data);
216int for_each_remote_ref_submodule(const char *submodule,
217 each_ref_fn fn, void *cb_data);
9ef6aeb0 218
1354c9b2
MH
219int head_ref_namespaced(each_ref_fn fn, void *cb_data);
220int for_each_namespaced_ref(each_ref_fn fn, void *cb_data);
a1bea2c1 221
fb58c8d5 222/* can be used to learn about broken ref and symref */
1354c9b2 223int for_each_rawref(each_ref_fn fn, void *cb_data);
fb58c8d5 224
894a9d33
TR
225static inline const char *has_glob_specials(const char *pattern)
226{
227 return strpbrk(pattern, "?*[");
228}
229
1354c9b2
MH
230void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname);
231void warn_dangling_symrefs(FILE *fp, const char *msg_fmt,
232 const struct string_list *refnames);
f8948e2f 233
32d462ce
MH
234/*
235 * Flags for controlling behaviour of pack_refs()
236 * PACK_REFS_PRUNE: Prune loose refs after packing
237 * PACK_REFS_ALL: Pack _all_ refs, not just tags and already packed refs
238 */
239#define PACK_REFS_PRUNE 0x0001
240#define PACK_REFS_ALL 0x0002
241
242/*
243 * Write a packed-refs file for the current repository.
244 * flags: Combination of the above PACK_REFS_* flags.
245 */
246int pack_refs(unsigned int flags);
247
835e3c99 248/*
31e07f76 249 * Flags controlling ref_transaction_update(), ref_transaction_create(), etc.
029cdb4a
RS
250 * REF_NODEREF: act on the ref directly, instead of dereferencing
251 * symbolic references.
252 *
581d4e0c 253 * Other flags are reserved for internal use.
835e3c99 254 */
68db31cc 255#define REF_NODEREF 0x01
0f2a71d9 256#define REF_FORCE_CREATE_REFLOG 0x40
95fc7512 257
bd3b02da 258/*
a4c653df 259 * Setup reflog before using. Fill in err and return -1 on failure.
bd3b02da 260 */
abd0cd3a 261int safe_create_reflog(const char *refname, int force_create, struct strbuf *err);
859c3017 262
d556fae2 263/** Reads log for the value of ref during at_time. **/
1354c9b2
MH
264int read_ref_at(const char *refname, unsigned int flags,
265 unsigned long at_time, int cnt,
266 unsigned char *sha1, char **msg,
267 unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt);
d556fae2 268
4da58835 269/** Check if a particular reflog exists */
1354c9b2 270int reflog_exists(const char *refname);
4da58835 271
fc1c2168 272/*
1c03c4d3
MH
273 * Delete the specified reference. If old_sha1 is non-NULL, then
274 * verify that the current value of the reference is old_sha1 before
275 * deleting it. If old_sha1 is NULL, delete the reference if it
276 * exists, regardless of its old value. It is an error for old_sha1 to
277 * be NULL_SHA1. flags is passed through to ref_transaction_delete().
fc1c2168 278 */
755b49ae
KM
279int delete_ref(const char *msg, const char *refname,
280 const unsigned char *old_sha1, unsigned int flags);
fc1c2168 281
98ffd5ff
MH
282/*
283 * Delete the specified references. If there are any problems, emit
284 * errors but attempt to keep going (i.e., the deletes are not done in
c5f04ddd
MH
285 * an all-or-nothing transaction). flags is passed through to
286 * ref_transaction_delete().
98ffd5ff 287 */
c5f04ddd 288int delete_refs(struct string_list *refnames, unsigned int flags);
98ffd5ff 289
4da58835 290/** Delete a reflog */
1354c9b2 291int delete_reflog(const char *refname);
4da58835 292
2ff81662 293/* iterate over reflog entries */
1354c9b2 294typedef int each_reflog_ent_fn(
9461d272 295 struct object_id *old_oid, struct object_id *new_oid,
1354c9b2
MH
296 const char *committer, unsigned long timestamp,
297 int tz, const char *msg, void *cb_data);
298
dfefa935 299int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data);
98f85ff4 300int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data);
2ff81662 301
eb8381c8
NP
302/*
303 * Calls the specified function for each reflog file until it returns nonzero,
304 * and returns the value
305 */
1354c9b2 306int for_each_reflog(each_ref_fn fn, void *cb_data);
eb8381c8 307
8d9c5010
MH
308#define REFNAME_ALLOW_ONELEVEL 1
309#define REFNAME_REFSPEC_PATTERN 2
310
311/*
dfefa935
MH
312 * Return 0 iff refname has the correct format for a refname according
313 * to the rules described in Documentation/git-check-ref-format.txt.
314 * If REFNAME_ALLOW_ONELEVEL is set in flags, then accept one-level
8d9c5010 315 * reference names. If REFNAME_REFSPEC_PATTERN is set in flags, then
cd377f45
JK
316 * allow a single "*" wildcard character in the refspec. No leading or
317 * repeated slashes are accepted.
8d9c5010 318 */
1354c9b2 319int check_refname_format(const char *refname, int flags);
95fc7512 320
1354c9b2 321const char *prettify_refname(const char *refname);
fb58c8d5 322
1354c9b2 323char *shorten_unambiguous_ref(const char *refname, int strict);
a9c37a72 324
c976d415 325/** rename ref, return 0 on success **/
1354c9b2 326int rename_ref(const char *oldref, const char *newref, const char *logmsg);
c976d415 327
1354c9b2 328int create_symref(const char *refname, const char *target, const char *logmsg);
0ebde32c 329
2233066e
KY
330/*
331 * Update HEAD of the specified gitdir.
332 * Similar to create_symref("relative-git-dir/HEAD", target, NULL), but
333 * this can update the main working tree's HEAD regardless of where
334 * $GIT_DIR points to.
335 * Return 0 if successful, non-zero otherwise.
336 * */
39ee4c6c
KM
337int set_worktree_head_symref(const char *gitdir, const char *target,
338 const char *logmsg);
2233066e 339
f4124112
MH
340enum action_on_err {
341 UPDATE_REFS_MSG_ON_ERR,
342 UPDATE_REFS_DIE_ON_ERR,
343 UPDATE_REFS_QUIET_ON_ERR
344};
345
caa4046c
MH
346/*
347 * Begin a reference transaction. The reference transaction must
33f9fc59 348 * be freed by calling ref_transaction_free().
caa4046c 349 */
93a644ea 350struct ref_transaction *ref_transaction_begin(struct strbuf *err);
caa4046c 351
caa4046c 352/*
d1dd721f
MH
353 * Reference transaction updates
354 *
355 * The following four functions add a reference check or update to a
356 * ref_transaction. They have some common similar parameters:
357 *
358 * transaction -- a pointer to an open ref_transaction, obtained
359 * from ref_transaction_begin().
360 *
361 * refname -- the name of the reference to be affected.
362 *
363 * flags -- flags affecting the update, passed to
364 * update_ref_lock(). Can be REF_NODEREF, which means that
365 * symbolic references should not be followed.
366 *
367 * msg -- a message describing the change (for the reflog).
368 *
369 * err -- a strbuf for receiving a description of any error that
dc72b500 370 * might have occurred.
d1dd721f
MH
371 *
372 * The functions make internal copies of refname and msg, so the
373 * caller retains ownership of these parameters.
374 *
375 * The functions return 0 on success and non-zero on failure. A
376 * failure means that the transaction as a whole has failed and needs
377 * to be rolled back.
caa4046c
MH
378 */
379
caa4046c 380/*
16180334
MH
381 * Add a reference update to transaction. new_sha1 is the value that
382 * the reference should have after the update, or null_sha1 if it
383 * should be deleted. If new_sha1 is NULL, then the reference is not
384 * changed at all. old_sha1 is the value that the reference must have
385 * before the update, or null_sha1 if it must not have existed
386 * beforehand. The old value is checked after the lock is taken to
387 * prevent races. If the old value doesn't agree with old_sha1, the
388 * whole transaction fails. If old_sha1 is NULL, then the previous
389 * value is not checked.
390 *
d1dd721f
MH
391 * See the above comment "Reference transaction updates" for more
392 * information.
caa4046c 393 */
8e34800e
RS
394int ref_transaction_update(struct ref_transaction *transaction,
395 const char *refname,
396 const unsigned char *new_sha1,
397 const unsigned char *old_sha1,
1d147bdf 398 unsigned int flags, const char *msg,
8e34800e 399 struct strbuf *err);
caa4046c
MH
400
401/*
d1dd721f
MH
402 * Add a reference creation to transaction. new_sha1 is the value that
403 * the reference should have after the update; it must not be
404 * null_sha1. It is verified that the reference does not exist
caa4046c 405 * already.
d1dd721f
MH
406 *
407 * See the above comment "Reference transaction updates" for more
408 * information.
caa4046c 409 */
b416af5b
RS
410int ref_transaction_create(struct ref_transaction *transaction,
411 const char *refname,
412 const unsigned char *new_sha1,
fec14ec3 413 unsigned int flags, const char *msg,
b416af5b 414 struct strbuf *err);
caa4046c
MH
415
416/*
d1dd721f
MH
417 * Add a reference deletion to transaction. If old_sha1 is non-NULL,
418 * then it holds the value that the reference should have had before
419 * the update (which must not be null_sha1).
420 *
421 * See the above comment "Reference transaction updates" for more
422 * information.
caa4046c 423 */
8c8bdc0d
RS
424int ref_transaction_delete(struct ref_transaction *transaction,
425 const char *refname,
426 const unsigned char *old_sha1,
fb5a6bb6 427 unsigned int flags, const char *msg,
8c8bdc0d 428 struct strbuf *err);
caa4046c 429
16180334
MH
430/*
431 * Verify, within a transaction, that refname has the value old_sha1,
432 * or, if old_sha1 is null_sha1, then verify that the reference
d1dd721f
MH
433 * doesn't exist. old_sha1 must be non-NULL.
434 *
435 * See the above comment "Reference transaction updates" for more
436 * information.
16180334
MH
437 */
438int ref_transaction_verify(struct ref_transaction *transaction,
439 const char *refname,
440 const unsigned char *old_sha1,
441 unsigned int flags,
442 struct strbuf *err);
443
caa4046c
MH
444/*
445 * Commit all of the changes that have been queued in transaction, as
28e6a97e
RS
446 * atomically as possible.
447 *
448 * Returns 0 for success, or one of the below error codes for errors.
caa4046c 449 */
28e6a97e
RS
450/* Naming conflict (for example, the ref names A and A/B conflict). */
451#define TRANSACTION_NAME_CONFLICT -1
452/* All other errors. */
453#define TRANSACTION_GENERIC_ERROR -2
caa4046c 454int ref_transaction_commit(struct ref_transaction *transaction,
db7516ab 455 struct strbuf *err);
caa4046c 456
58f233ce
MH
457/*
458 * Like ref_transaction_commit(), but optimized for creating
459 * references when originally initializing a repository (e.g., by "git
460 * clone"). It writes the new references directly to packed-refs
461 * without locking the individual references.
462 *
463 * It is a bug to call this function when there might be other
464 * processes accessing the repository or if there are existing
465 * references that might conflict with the ones being created. All
466 * old_sha1 values must either be absent or NULL_SHA1.
467 */
468int initial_ref_transaction_commit(struct ref_transaction *transaction,
469 struct strbuf *err);
470
026bd1d3
RS
471/*
472 * Free an existing transaction and all associated data.
473 */
474void ref_transaction_free(struct ref_transaction *transaction);
475
4b7b520b
MH
476/**
477 * Lock, update, and unlock a single reference. This function
478 * basically does a transaction containing a single call to
479 * ref_transaction_update(). The parameters to this function have the
480 * same meaning as the corresponding parameters to
481 * ref_transaction_update(). Handle errors as requested by the `onerr`
482 * argument.
483 */
484int update_ref(const char *msg, const char *refname,
485 const unsigned char *new_sha1, const unsigned char *old_sha1,
fec14ec3 486 unsigned int flags, enum action_on_err onerr);
8f6dc7e3 487int update_ref_oid(const char *msg, const char *refname,
488 const struct object_id *new_oid, const struct object_id *old_oid,
489 unsigned int flags, enum action_on_err onerr);
3d9f037c 490
1354c9b2 491int parse_hide_refs_config(const char *var, const char *value, const char *);
fb58c8d5 492
78a766ab
LF
493/*
494 * Check whether a ref is hidden. If no namespace is set, both the first and
495 * the second parameter point to the full ref name. If a namespace is set and
496 * the ref is inside that namespace, the first parameter is a pointer to the
497 * name of the ref with the namespace prefix removed. If a namespace is set and
498 * the ref is outside that namespace, the first parameter is NULL. The second
499 * parameter always points to the full ref name.
500 */
1354c9b2 501int ref_is_hidden(const char *, const char *);
daebaa78 502
266b1827
DT
503enum ref_type {
504 REF_TYPE_PER_WORKTREE,
505 REF_TYPE_PSEUDOREF,
506 REF_TYPE_NORMAL,
507};
508
509enum ref_type ref_type(const char *refname);
510
fa5b1830
MH
511enum expire_reflog_flags {
512 EXPIRE_REFLOGS_DRY_RUN = 1 << 0,
513 EXPIRE_REFLOGS_UPDATE_REF = 1 << 1,
514 EXPIRE_REFLOGS_VERBOSE = 1 << 2,
515 EXPIRE_REFLOGS_REWRITE = 1 << 3
516};
517
518/*
519 * The following interface is used for reflog expiration. The caller
520 * calls reflog_expire(), supplying it with three callback functions,
521 * of the following types. The callback functions define the
522 * expiration policy that is desired.
523 *
524 * reflog_expiry_prepare_fn -- Called once after the reference is
525 * locked.
526 *
527 * reflog_expiry_should_prune_fn -- Called once for each entry in the
528 * existing reflog. It should return true iff that entry should be
529 * pruned.
530 *
531 * reflog_expiry_cleanup_fn -- Called once before the reference is
532 * unlocked again.
533 */
534typedef void reflog_expiry_prepare_fn(const char *refname,
535 const unsigned char *sha1,
536 void *cb_data);
537typedef int reflog_expiry_should_prune_fn(unsigned char *osha1,
538 unsigned char *nsha1,
539 const char *email,
540 unsigned long timestamp, int tz,
541 const char *message, void *cb_data);
542typedef void reflog_expiry_cleanup_fn(void *cb_data);
543
544/*
545 * Expire reflog entries for the specified reference. sha1 is the old
546 * value of the reference. flags is a combination of the constants in
547 * enum expire_reflog_flags. The three function pointers are described
548 * above. On success, return zero.
549 */
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MH
550int reflog_expire(const char *refname, const unsigned char *sha1,
551 unsigned int flags,
552 reflog_expiry_prepare_fn prepare_fn,
553 reflog_expiry_should_prune_fn should_prune_fn,
554 reflog_expiry_cleanup_fn cleanup_fn,
555 void *policy_cb_data);
fa5b1830 556
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RS
557int ref_storage_backend_exists(const char *name);
558
95fc7512 559#endif /* REFS_H */