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95fc7512 DB |
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 | ||
55 | extern const char *resolve_ref_unsafe(const char *refname, int resolve_flags, | |
56 | unsigned char *sha1, int *flags); | |
57 | ||
58 | extern char *resolve_refdup(const char *refname, int resolve_flags, | |
59 | unsigned char *sha1, int *flags); | |
60 | ||
61 | extern int read_ref_full(const char *refname, int resolve_flags, | |
62 | unsigned char *sha1, int *flags); | |
63 | extern int read_ref(const char *refname, unsigned char *sha1); | |
64 | ||
24337102 | 65 | extern int ref_exists(const char *refname); |
fb58c8d5 MH |
66 | |
67 | extern int is_branch(const char *refname); | |
68 | ||
69 | /* | |
70 | * If refname is a non-symbolic reference that refers to a tag object, | |
71 | * and the tag can be (recursively) dereferenced to a non-tag object, | |
72 | * store the SHA1 of the referred-to object to sha1 and return 0. If | |
73 | * any of these conditions are not met, return a non-zero value. | |
74 | * Symbolic references are considered unpeelable, even if they | |
75 | * ultimately resolve to a peelable tag. | |
76 | */ | |
77 | extern int peel_ref(const char *refname, unsigned char *sha1); | |
78 | ||
79 | /** | |
80 | * Resolve refname in the nested "gitlink" repository that is located | |
81 | * at path. If the resolution is successful, return 0 and set sha1 to | |
82 | * the name of the object; otherwise, return a non-zero value. | |
83 | */ | |
84 | extern int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1); | |
85 | ||
86 | /* | |
87 | * Return true iff abbrev_name is a possible abbreviation for | |
88 | * full_name according to the rules defined by ref_rev_parse_rules in | |
89 | * refs.c. | |
90 | */ | |
91 | extern int refname_match(const char *abbrev_name, const char *full_name); | |
92 | ||
93 | extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref); | |
94 | extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref); | |
95 | ||
b416af5b RS |
96 | /* |
97 | * A ref_transaction represents a collection of ref updates | |
98 | * that should succeed or fail together. | |
99 | * | |
100 | * Calling sequence | |
101 | * ---------------- | |
102 | * - Allocate and initialize a `struct ref_transaction` by calling | |
103 | * `ref_transaction_begin()`. | |
104 | * | |
105 | * - List intended ref updates by calling functions like | |
106 | * `ref_transaction_update()` and `ref_transaction_create()`. | |
107 | * | |
108 | * - Call `ref_transaction_commit()` to execute the transaction. | |
109 | * If this succeeds, the ref updates will have taken place and | |
110 | * the transaction cannot be rolled back. | |
111 | * | |
112 | * - At any time call `ref_transaction_free()` to discard the | |
113 | * transaction and free associated resources. In particular, | |
114 | * this rolls back the transaction if it has not been | |
115 | * successfully committed. | |
116 | * | |
117 | * Error handling | |
118 | * -------------- | |
119 | * | |
120 | * On error, transaction functions append a message about what | |
121 | * went wrong to the 'err' argument. The message mentions what | |
122 | * ref was being updated (if any) when the error occurred so it | |
123 | * can be passed to 'die' or 'error' as-is. | |
124 | * | |
125 | * The message is appended to err without first clearing err. | |
126 | * err will not be '\n' terminated. | |
127 | */ | |
caa4046c MH |
128 | struct ref_transaction; |
129 | ||
89df9c84 MH |
130 | /* |
131 | * Bit values set in the flags argument passed to each_ref_fn(): | |
132 | */ | |
133 | ||
134 | /* Reference is a symbolic reference. */ | |
98ac34b2 | 135 | #define REF_ISSYMREF 0x01 |
89df9c84 MH |
136 | |
137 | /* Reference is a packed reference. */ | |
98ac34b2 | 138 | #define REF_ISPACKED 0x02 |
89df9c84 MH |
139 | |
140 | /* | |
141 | * Reference cannot be resolved to an object name: dangling symbolic | |
d0f810f0 RS |
142 | * reference (directly or indirectly), corrupt reference file, |
143 | * reference exists but name is bad, or symbolic reference refers to | |
144 | * ill-formatted reference name. | |
89df9c84 | 145 | */ |
98ac34b2 | 146 | #define REF_ISBROKEN 0x04 |
f4204ab9 | 147 | |
d0f810f0 RS |
148 | /* |
149 | * Reference name is not well formed. | |
150 | * | |
151 | * See git-check-ref-format(1) for the definition of well formed ref names. | |
152 | */ | |
153 | #define REF_BAD_NAME 0x08 | |
154 | ||
8a65ff76 | 155 | /* |
4f78c24c MH |
156 | * The signature for the callback function for the for_each_*() |
157 | * functions below. The memory pointed to by the refname and sha1 | |
158 | * arguments is only guaranteed to be valid for the duration of a | |
159 | * single callback invocation. | |
160 | */ | |
161 | typedef int each_ref_fn(const char *refname, | |
2b2a5be3 MH |
162 | const struct object_id *oid, int flags, void *cb_data); |
163 | ||
4f78c24c MH |
164 | /* |
165 | * The following functions invoke the specified callback function for | |
166 | * each reference indicated. If the function ever returns a nonzero | |
167 | * value, stop the iteration and return that value. Please note that | |
168 | * it is not safe to modify references while an iteration is in | |
169 | * progress, unless the same callback function invocation that | |
170 | * modifies the reference also returns a nonzero value to immediately | |
171 | * stop the iteration. | |
8a65ff76 | 172 | */ |
24337102 MH |
173 | extern int head_ref(each_ref_fn fn, void *cb_data); |
174 | extern int for_each_ref(each_ref_fn fn, void *cb_data); | |
175 | extern int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data); | |
5b4f2851 | 176 | extern int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken); |
24337102 MH |
177 | extern int for_each_tag_ref(each_ref_fn fn, void *cb_data); |
178 | extern int for_each_branch_ref(each_ref_fn fn, void *cb_data); | |
179 | extern int for_each_remote_ref(each_ref_fn fn, void *cb_data); | |
180 | extern int for_each_replace_ref(each_ref_fn fn, void *cb_data); | |
181 | extern int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data); | |
182 | extern int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, const char *prefix, void *cb_data); | |
8a65ff76 | 183 | |
9ef6aeb0 HV |
184 | extern int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); |
185 | extern int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
186 | extern int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
187 | each_ref_fn fn, void *cb_data); | |
188 | extern int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
189 | extern int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
190 | extern int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
191 | ||
a1bea2c1 JT |
192 | extern int head_ref_namespaced(each_ref_fn fn, void *cb_data); |
193 | extern int for_each_namespaced_ref(each_ref_fn fn, void *cb_data); | |
194 | ||
fb58c8d5 | 195 | /* can be used to learn about broken ref and symref */ |
24337102 | 196 | extern int for_each_rawref(each_ref_fn fn, void *cb_data); |
fb58c8d5 | 197 | |
894a9d33 TR |
198 | static inline const char *has_glob_specials(const char *pattern) |
199 | { | |
200 | return strpbrk(pattern, "?*["); | |
201 | } | |
202 | ||
3cf6134a | 203 | extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname); |
24d36f14 | 204 | extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames); |
f8948e2f | 205 | |
32d462ce MH |
206 | /* |
207 | * Flags for controlling behaviour of pack_refs() | |
208 | * PACK_REFS_PRUNE: Prune loose refs after packing | |
209 | * PACK_REFS_ALL: Pack _all_ refs, not just tags and already packed refs | |
210 | */ | |
211 | #define PACK_REFS_PRUNE 0x0001 | |
212 | #define PACK_REFS_ALL 0x0002 | |
213 | ||
214 | /* | |
215 | * Write a packed-refs file for the current repository. | |
216 | * flags: Combination of the above PACK_REFS_* flags. | |
217 | */ | |
218 | int pack_refs(unsigned int flags); | |
219 | ||
835e3c99 | 220 | /* |
31e07f76 | 221 | * Flags controlling ref_transaction_update(), ref_transaction_create(), etc. |
029cdb4a RS |
222 | * REF_NODEREF: act on the ref directly, instead of dereferencing |
223 | * symbolic references. | |
224 | * | |
581d4e0c | 225 | * Other flags are reserved for internal use. |
835e3c99 | 226 | */ |
68db31cc | 227 | #define REF_NODEREF 0x01 |
0f2a71d9 | 228 | #define REF_FORCE_CREATE_REFLOG 0x40 |
95fc7512 | 229 | |
bd3b02da | 230 | /* |
a4c653df | 231 | * Setup reflog before using. Fill in err and return -1 on failure. |
bd3b02da | 232 | */ |
abd0cd3a | 233 | int safe_create_reflog(const char *refname, int force_create, struct strbuf *err); |
859c3017 | 234 | |
d556fae2 | 235 | /** Reads log for the value of ref during at_time. **/ |
c41a87dd DA |
236 | extern int read_ref_at(const char *refname, unsigned int flags, |
237 | unsigned long at_time, int cnt, | |
dfefa935 MH |
238 | unsigned char *sha1, char **msg, |
239 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt); | |
d556fae2 | 240 | |
4da58835 RS |
241 | /** Check if a particular reflog exists */ |
242 | extern int reflog_exists(const char *refname); | |
243 | ||
fc1c2168 | 244 | /* |
1c03c4d3 MH |
245 | * Delete the specified reference. If old_sha1 is non-NULL, then |
246 | * verify that the current value of the reference is old_sha1 before | |
247 | * deleting it. If old_sha1 is NULL, delete the reference if it | |
248 | * exists, regardless of its old value. It is an error for old_sha1 to | |
249 | * be NULL_SHA1. flags is passed through to ref_transaction_delete(). | |
fc1c2168 MH |
250 | */ |
251 | extern int delete_ref(const char *refname, const unsigned char *old_sha1, | |
252 | unsigned int flags); | |
253 | ||
98ffd5ff MH |
254 | /* |
255 | * Delete the specified references. If there are any problems, emit | |
256 | * errors but attempt to keep going (i.e., the deletes are not done in | |
257 | * an all-or-nothing transaction). | |
258 | */ | |
259 | extern int delete_refs(struct string_list *refnames); | |
260 | ||
4da58835 RS |
261 | /** Delete a reflog */ |
262 | extern int delete_reflog(const char *refname); | |
263 | ||
2ff81662 | 264 | /* iterate over reflog entries */ |
883d60fa | 265 | typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *); |
dfefa935 | 266 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
98f85ff4 | 267 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
2ff81662 | 268 | |
eb8381c8 NP |
269 | /* |
270 | * Calls the specified function for each reflog file until it returns nonzero, | |
271 | * and returns the value | |
272 | */ | |
273 | extern int for_each_reflog(each_ref_fn, void *); | |
274 | ||
8d9c5010 MH |
275 | #define REFNAME_ALLOW_ONELEVEL 1 |
276 | #define REFNAME_REFSPEC_PATTERN 2 | |
277 | ||
278 | /* | |
dfefa935 MH |
279 | * Return 0 iff refname has the correct format for a refname according |
280 | * to the rules described in Documentation/git-check-ref-format.txt. | |
281 | * If REFNAME_ALLOW_ONELEVEL is set in flags, then accept one-level | |
8d9c5010 | 282 | * reference names. If REFNAME_REFSPEC_PATTERN is set in flags, then |
cd377f45 JK |
283 | * allow a single "*" wildcard character in the refspec. No leading or |
284 | * repeated slashes are accepted. | |
8d9c5010 | 285 | */ |
dfefa935 | 286 | extern int check_refname_format(const char *refname, int flags); |
95fc7512 | 287 | |
4577e483 | 288 | extern const char *prettify_refname(const char *refname); |
fb58c8d5 | 289 | |
dfefa935 | 290 | extern char *shorten_unambiguous_ref(const char *refname, int strict); |
a9c37a72 | 291 | |
c976d415 | 292 | /** rename ref, return 0 on success **/ |
678d0f4c | 293 | extern int rename_ref(const char *oldref, const char *newref, const char *logmsg); |
c976d415 | 294 | |
b9badadd | 295 | extern int create_symref(const char *refname, const char *target, const char *logmsg); |
0ebde32c | 296 | |
f4124112 MH |
297 | enum action_on_err { |
298 | UPDATE_REFS_MSG_ON_ERR, | |
299 | UPDATE_REFS_DIE_ON_ERR, | |
300 | UPDATE_REFS_QUIET_ON_ERR | |
301 | }; | |
302 | ||
caa4046c MH |
303 | /* |
304 | * Begin a reference transaction. The reference transaction must | |
33f9fc59 | 305 | * be freed by calling ref_transaction_free(). |
caa4046c | 306 | */ |
93a644ea | 307 | struct ref_transaction *ref_transaction_begin(struct strbuf *err); |
caa4046c | 308 | |
caa4046c | 309 | /* |
d1dd721f MH |
310 | * Reference transaction updates |
311 | * | |
312 | * The following four functions add a reference check or update to a | |
313 | * ref_transaction. They have some common similar parameters: | |
314 | * | |
315 | * transaction -- a pointer to an open ref_transaction, obtained | |
316 | * from ref_transaction_begin(). | |
317 | * | |
318 | * refname -- the name of the reference to be affected. | |
319 | * | |
320 | * flags -- flags affecting the update, passed to | |
321 | * update_ref_lock(). Can be REF_NODEREF, which means that | |
322 | * symbolic references should not be followed. | |
323 | * | |
324 | * msg -- a message describing the change (for the reflog). | |
325 | * | |
326 | * err -- a strbuf for receiving a description of any error that | |
327 | * might have occured. | |
328 | * | |
329 | * The functions make internal copies of refname and msg, so the | |
330 | * caller retains ownership of these parameters. | |
331 | * | |
332 | * The functions return 0 on success and non-zero on failure. A | |
333 | * failure means that the transaction as a whole has failed and needs | |
334 | * to be rolled back. | |
caa4046c MH |
335 | */ |
336 | ||
caa4046c | 337 | /* |
16180334 MH |
338 | * Add a reference update to transaction. new_sha1 is the value that |
339 | * the reference should have after the update, or null_sha1 if it | |
340 | * should be deleted. If new_sha1 is NULL, then the reference is not | |
341 | * changed at all. old_sha1 is the value that the reference must have | |
342 | * before the update, or null_sha1 if it must not have existed | |
343 | * beforehand. The old value is checked after the lock is taken to | |
344 | * prevent races. If the old value doesn't agree with old_sha1, the | |
345 | * whole transaction fails. If old_sha1 is NULL, then the previous | |
346 | * value is not checked. | |
347 | * | |
d1dd721f MH |
348 | * See the above comment "Reference transaction updates" for more |
349 | * information. | |
caa4046c | 350 | */ |
8e34800e RS |
351 | int ref_transaction_update(struct ref_transaction *transaction, |
352 | const char *refname, | |
353 | const unsigned char *new_sha1, | |
354 | const unsigned char *old_sha1, | |
1d147bdf | 355 | unsigned int flags, const char *msg, |
8e34800e | 356 | struct strbuf *err); |
caa4046c MH |
357 | |
358 | /* | |
d1dd721f MH |
359 | * Add a reference creation to transaction. new_sha1 is the value that |
360 | * the reference should have after the update; it must not be | |
361 | * null_sha1. It is verified that the reference does not exist | |
caa4046c | 362 | * already. |
d1dd721f MH |
363 | * |
364 | * See the above comment "Reference transaction updates" for more | |
365 | * information. | |
caa4046c | 366 | */ |
b416af5b RS |
367 | int ref_transaction_create(struct ref_transaction *transaction, |
368 | const char *refname, | |
369 | const unsigned char *new_sha1, | |
fec14ec3 | 370 | unsigned int flags, const char *msg, |
b416af5b | 371 | struct strbuf *err); |
caa4046c MH |
372 | |
373 | /* | |
d1dd721f MH |
374 | * Add a reference deletion to transaction. If old_sha1 is non-NULL, |
375 | * then it holds the value that the reference should have had before | |
376 | * the update (which must not be null_sha1). | |
377 | * | |
378 | * See the above comment "Reference transaction updates" for more | |
379 | * information. | |
caa4046c | 380 | */ |
8c8bdc0d RS |
381 | int ref_transaction_delete(struct ref_transaction *transaction, |
382 | const char *refname, | |
383 | const unsigned char *old_sha1, | |
fb5a6bb6 | 384 | unsigned int flags, const char *msg, |
8c8bdc0d | 385 | struct strbuf *err); |
caa4046c | 386 | |
16180334 MH |
387 | /* |
388 | * Verify, within a transaction, that refname has the value old_sha1, | |
389 | * or, if old_sha1 is null_sha1, then verify that the reference | |
d1dd721f MH |
390 | * doesn't exist. old_sha1 must be non-NULL. |
391 | * | |
392 | * See the above comment "Reference transaction updates" for more | |
393 | * information. | |
16180334 MH |
394 | */ |
395 | int ref_transaction_verify(struct ref_transaction *transaction, | |
396 | const char *refname, | |
397 | const unsigned char *old_sha1, | |
398 | unsigned int flags, | |
399 | struct strbuf *err); | |
400 | ||
caa4046c MH |
401 | /* |
402 | * Commit all of the changes that have been queued in transaction, as | |
28e6a97e RS |
403 | * atomically as possible. |
404 | * | |
405 | * Returns 0 for success, or one of the below error codes for errors. | |
caa4046c | 406 | */ |
28e6a97e RS |
407 | /* Naming conflict (for example, the ref names A and A/B conflict). */ |
408 | #define TRANSACTION_NAME_CONFLICT -1 | |
409 | /* All other errors. */ | |
410 | #define TRANSACTION_GENERIC_ERROR -2 | |
caa4046c | 411 | int ref_transaction_commit(struct ref_transaction *transaction, |
db7516ab | 412 | struct strbuf *err); |
caa4046c | 413 | |
58f233ce MH |
414 | /* |
415 | * Like ref_transaction_commit(), but optimized for creating | |
416 | * references when originally initializing a repository (e.g., by "git | |
417 | * clone"). It writes the new references directly to packed-refs | |
418 | * without locking the individual references. | |
419 | * | |
420 | * It is a bug to call this function when there might be other | |
421 | * processes accessing the repository or if there are existing | |
422 | * references that might conflict with the ones being created. All | |
423 | * old_sha1 values must either be absent or NULL_SHA1. | |
424 | */ | |
425 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
426 | struct strbuf *err); | |
427 | ||
026bd1d3 RS |
428 | /* |
429 | * Free an existing transaction and all associated data. | |
430 | */ | |
431 | void ref_transaction_free(struct ref_transaction *transaction); | |
432 | ||
4b7b520b MH |
433 | /** |
434 | * Lock, update, and unlock a single reference. This function | |
435 | * basically does a transaction containing a single call to | |
436 | * ref_transaction_update(). The parameters to this function have the | |
437 | * same meaning as the corresponding parameters to | |
438 | * ref_transaction_update(). Handle errors as requested by the `onerr` | |
439 | * argument. | |
440 | */ | |
441 | int update_ref(const char *msg, const char *refname, | |
442 | const unsigned char *new_sha1, const unsigned char *old_sha1, | |
fec14ec3 | 443 | unsigned int flags, enum action_on_err onerr); |
3d9f037c | 444 | |
daebaa78 | 445 | extern int parse_hide_refs_config(const char *var, const char *value, const char *); |
fb58c8d5 | 446 | |
78a766ab LF |
447 | /* |
448 | * Check whether a ref is hidden. If no namespace is set, both the first and | |
449 | * the second parameter point to the full ref name. If a namespace is set and | |
450 | * the ref is inside that namespace, the first parameter is a pointer to the | |
451 | * name of the ref with the namespace prefix removed. If a namespace is set and | |
452 | * the ref is outside that namespace, the first parameter is NULL. The second | |
453 | * parameter always points to the full ref name. | |
454 | */ | |
455 | extern int ref_is_hidden(const char *, const char *); | |
daebaa78 | 456 | |
266b1827 DT |
457 | enum ref_type { |
458 | REF_TYPE_PER_WORKTREE, | |
459 | REF_TYPE_PSEUDOREF, | |
460 | REF_TYPE_NORMAL, | |
461 | }; | |
462 | ||
463 | enum ref_type ref_type(const char *refname); | |
464 | ||
fa5b1830 MH |
465 | enum expire_reflog_flags { |
466 | EXPIRE_REFLOGS_DRY_RUN = 1 << 0, | |
467 | EXPIRE_REFLOGS_UPDATE_REF = 1 << 1, | |
468 | EXPIRE_REFLOGS_VERBOSE = 1 << 2, | |
469 | EXPIRE_REFLOGS_REWRITE = 1 << 3 | |
470 | }; | |
471 | ||
472 | /* | |
473 | * The following interface is used for reflog expiration. The caller | |
474 | * calls reflog_expire(), supplying it with three callback functions, | |
475 | * of the following types. The callback functions define the | |
476 | * expiration policy that is desired. | |
477 | * | |
478 | * reflog_expiry_prepare_fn -- Called once after the reference is | |
479 | * locked. | |
480 | * | |
481 | * reflog_expiry_should_prune_fn -- Called once for each entry in the | |
482 | * existing reflog. It should return true iff that entry should be | |
483 | * pruned. | |
484 | * | |
485 | * reflog_expiry_cleanup_fn -- Called once before the reference is | |
486 | * unlocked again. | |
487 | */ | |
488 | typedef void reflog_expiry_prepare_fn(const char *refname, | |
489 | const unsigned char *sha1, | |
490 | void *cb_data); | |
491 | typedef int reflog_expiry_should_prune_fn(unsigned char *osha1, | |
492 | unsigned char *nsha1, | |
493 | const char *email, | |
494 | unsigned long timestamp, int tz, | |
495 | const char *message, void *cb_data); | |
496 | typedef void reflog_expiry_cleanup_fn(void *cb_data); | |
497 | ||
498 | /* | |
499 | * Expire reflog entries for the specified reference. sha1 is the old | |
500 | * value of the reference. flags is a combination of the constants in | |
501 | * enum expire_reflog_flags. The three function pointers are described | |
502 | * above. On success, return zero. | |
503 | */ | |
504 | extern int reflog_expire(const char *refname, const unsigned char *sha1, | |
505 | unsigned int flags, | |
506 | reflog_expiry_prepare_fn prepare_fn, | |
507 | reflog_expiry_should_prune_fn should_prune_fn, | |
508 | reflog_expiry_cleanup_fn cleanup_fn, | |
509 | void *policy_cb_data); | |
510 | ||
95fc7512 | 511 | #endif /* REFS_H */ |