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95fc7512 DB |
1 | #ifndef REFS_H |
2 | #define REFS_H | |
3 | ||
4bd18c43 | 4 | struct ref_lock { |
434cd0cd | 5 | char *ref_name; |
1655707c | 6 | char *orig_ref_name; |
c33d5174 | 7 | struct lock_file *lk; |
4bd18c43 SP |
8 | unsigned char old_sha1[20]; |
9 | int lock_fd; | |
732232a1 | 10 | int force_write; |
4bd18c43 SP |
11 | }; |
12 | ||
caa4046c MH |
13 | struct ref_transaction; |
14 | ||
89df9c84 MH |
15 | /* |
16 | * Bit values set in the flags argument passed to each_ref_fn(): | |
17 | */ | |
18 | ||
19 | /* Reference is a symbolic reference. */ | |
98ac34b2 | 20 | #define REF_ISSYMREF 0x01 |
89df9c84 MH |
21 | |
22 | /* Reference is a packed reference. */ | |
98ac34b2 | 23 | #define REF_ISPACKED 0x02 |
89df9c84 MH |
24 | |
25 | /* | |
26 | * Reference cannot be resolved to an object name: dangling symbolic | |
27 | * reference (directly or indirectly), corrupt reference file, or | |
28 | * symbolic reference refers to ill-formatted reference name. | |
29 | */ | |
98ac34b2 | 30 | #define REF_ISBROKEN 0x04 |
f4204ab9 | 31 | |
8a65ff76 | 32 | /* |
4f78c24c MH |
33 | * The signature for the callback function for the for_each_*() |
34 | * functions below. The memory pointed to by the refname and sha1 | |
35 | * arguments is only guaranteed to be valid for the duration of a | |
36 | * single callback invocation. | |
37 | */ | |
38 | typedef int each_ref_fn(const char *refname, | |
39 | const unsigned char *sha1, int flags, void *cb_data); | |
40 | ||
41 | /* | |
42 | * The following functions invoke the specified callback function for | |
43 | * each reference indicated. If the function ever returns a nonzero | |
44 | * value, stop the iteration and return that value. Please note that | |
45 | * it is not safe to modify references while an iteration is in | |
46 | * progress, unless the same callback function invocation that | |
47 | * modifies the reference also returns a nonzero value to immediately | |
48 | * stop the iteration. | |
8a65ff76 | 49 | */ |
cb5d709f JH |
50 | extern int head_ref(each_ref_fn, void *); |
51 | extern int for_each_ref(each_ref_fn, void *); | |
2a8177b6 | 52 | extern int for_each_ref_in(const char *, each_ref_fn, void *); |
cb5d709f JH |
53 | extern int for_each_tag_ref(each_ref_fn, void *); |
54 | extern int for_each_branch_ref(each_ref_fn, void *); | |
55 | extern int for_each_remote_ref(each_ref_fn, void *); | |
29268700 | 56 | extern int for_each_replace_ref(each_ref_fn, void *); |
d08bae7e | 57 | extern int for_each_glob_ref(each_ref_fn, const char *pattern, void *); |
b09fe971 | 58 | extern int for_each_glob_ref_in(each_ref_fn, const char *pattern, const char* prefix, void *); |
8a65ff76 | 59 | |
9ef6aeb0 HV |
60 | extern int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); |
61 | extern int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
62 | extern int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
63 | each_ref_fn fn, void *cb_data); | |
64 | extern int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
65 | extern int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
66 | extern int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data); | |
67 | ||
a1bea2c1 JT |
68 | extern int head_ref_namespaced(each_ref_fn fn, void *cb_data); |
69 | extern int for_each_namespaced_ref(each_ref_fn fn, void *cb_data); | |
70 | ||
894a9d33 TR |
71 | static inline const char *has_glob_specials(const char *pattern) |
72 | { | |
73 | return strpbrk(pattern, "?*["); | |
74 | } | |
75 | ||
f8948e2f JH |
76 | /* can be used to learn about broken ref and symref */ |
77 | extern int for_each_rawref(each_ref_fn, void *); | |
78 | ||
3cf6134a | 79 | extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname); |
e6bea66d | 80 | extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list* refnames); |
f8948e2f | 81 | |
30249ee6 | 82 | /* |
9f69d297 MH |
83 | * Lock the packed-refs file for writing. Flags is passed to |
84 | * hold_lock_file_for_update(). Return 0 on success. | |
85 | */ | |
86 | extern int lock_packed_refs(int flags); | |
87 | ||
88 | /* | |
89 | * Add a reference to the in-memory packed reference cache. This may | |
90 | * only be called while the packed-refs file is locked (see | |
91 | * lock_packed_refs()). To actually write the packed-refs file, call | |
92 | * commit_packed_refs(). | |
30249ee6 MH |
93 | */ |
94 | extern void add_packed_ref(const char *refname, const unsigned char *sha1); | |
95 | ||
9f69d297 MH |
96 | /* |
97 | * Write the current version of the packed refs cache from memory to | |
98 | * disk. The packed-refs file must already be locked for writing (see | |
99 | * lock_packed_refs()). Return zero on success. | |
100 | */ | |
101 | extern int commit_packed_refs(void); | |
102 | ||
103 | /* | |
104 | * Rollback the lockfile for the packed-refs file, and discard the | |
105 | * in-memory packed reference cache. (The packed-refs file will be | |
106 | * read anew if it is needed again after this function is called.) | |
107 | */ | |
108 | extern void rollback_packed_refs(void); | |
109 | ||
32d462ce MH |
110 | /* |
111 | * Flags for controlling behaviour of pack_refs() | |
112 | * PACK_REFS_PRUNE: Prune loose refs after packing | |
113 | * PACK_REFS_ALL: Pack _all_ refs, not just tags and already packed refs | |
114 | */ | |
115 | #define PACK_REFS_PRUNE 0x0001 | |
116 | #define PACK_REFS_ALL 0x0002 | |
117 | ||
118 | /* | |
119 | * Write a packed-refs file for the current repository. | |
120 | * flags: Combination of the above PACK_REFS_* flags. | |
121 | */ | |
122 | int pack_refs(unsigned int flags); | |
123 | ||
c9e768bb JL |
124 | extern int repack_without_refs(const char **refnames, int n); |
125 | ||
2c5c66be | 126 | extern int ref_exists(const char *); |
e142a3c6 | 127 | |
2312a793 MH |
128 | /* |
129 | * If refname is a non-symbolic reference that refers to a tag object, | |
130 | * and the tag can be (recursively) dereferenced to a non-tag object, | |
131 | * store the SHA1 of the referred-to object to sha1 and return 0. If | |
132 | * any of these conditions are not met, return a non-zero value. | |
133 | * Symbolic references are considered unpeelable, even if they | |
134 | * ultimately resolve to a peelable tag. | |
135 | */ | |
dfefa935 | 136 | extern int peel_ref(const char *refname, unsigned char *sha1); |
cf0adba7 | 137 | |
4bd18c43 | 138 | /** Locks a "refs/" ref returning the lock on success and NULL on failure. **/ |
dfefa935 | 139 | extern struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1); |
4bd18c43 SP |
140 | |
141 | /** Locks any ref (for 'HEAD' type refs). */ | |
68db31cc | 142 | #define REF_NODEREF 0x01 |
dfefa935 MH |
143 | extern struct ref_lock *lock_any_ref_for_update(const char *refname, |
144 | const unsigned char *old_sha1, | |
9bbb0fa1 | 145 | int flags, int *type_p); |
95fc7512 | 146 | |
435fc852 BC |
147 | /** Close the file descriptor owned by a lock and return the status */ |
148 | extern int close_ref(struct ref_lock *lock); | |
149 | ||
150 | /** Close and commit the ref locked by the lock */ | |
151 | extern int commit_ref(struct ref_lock *lock); | |
152 | ||
4bd18c43 | 153 | /** Release any lock taken but not written. **/ |
e5f38ec3 | 154 | extern void unlock_ref(struct ref_lock *lock); |
95fc7512 | 155 | |
4bd18c43 SP |
156 | /** Writes sha1 into the ref specified by the lock. **/ |
157 | extern int write_ref_sha1(struct ref_lock *lock, const unsigned char *sha1, const char *msg); | |
95fc7512 | 158 | |
859c3017 | 159 | /** Setup reflog before using. **/ |
5524e241 | 160 | int log_ref_setup(const char *refname, char *logfile, int bufsize); |
859c3017 | 161 | |
d556fae2 | 162 | /** Reads log for the value of ref during at_time. **/ |
dfefa935 MH |
163 | extern int read_ref_at(const char *refname, unsigned long at_time, int cnt, |
164 | unsigned char *sha1, char **msg, | |
165 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt); | |
d556fae2 | 166 | |
4da58835 RS |
167 | /** Check if a particular reflog exists */ |
168 | extern int reflog_exists(const char *refname); | |
169 | ||
170 | /** Delete a reflog */ | |
171 | extern int delete_reflog(const char *refname); | |
172 | ||
2ff81662 | 173 | /* iterate over reflog entries */ |
883d60fa | 174 | typedef int each_reflog_ent_fn(unsigned char *osha1, unsigned char *nsha1, const char *, unsigned long, int, const char *, void *); |
dfefa935 | 175 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
98f85ff4 | 176 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
2ff81662 | 177 | |
eb8381c8 NP |
178 | /* |
179 | * Calls the specified function for each reflog file until it returns nonzero, | |
180 | * and returns the value | |
181 | */ | |
182 | extern int for_each_reflog(each_ref_fn, void *); | |
183 | ||
8d9c5010 MH |
184 | #define REFNAME_ALLOW_ONELEVEL 1 |
185 | #define REFNAME_REFSPEC_PATTERN 2 | |
dce4bab6 | 186 | #define REFNAME_DOT_COMPONENT 4 |
8d9c5010 MH |
187 | |
188 | /* | |
dfefa935 MH |
189 | * Return 0 iff refname has the correct format for a refname according |
190 | * to the rules described in Documentation/git-check-ref-format.txt. | |
191 | * If REFNAME_ALLOW_ONELEVEL is set in flags, then accept one-level | |
8d9c5010 MH |
192 | * reference names. If REFNAME_REFSPEC_PATTERN is set in flags, then |
193 | * allow a "*" wildcard character in place of one of the name | |
dce4bab6 MH |
194 | * components. No leading or repeated slashes are accepted. If |
195 | * REFNAME_DOT_COMPONENT is set in flags, then allow refname | |
196 | * components to start with "." (but not a whole component equal to | |
197 | * "." or ".."). | |
8d9c5010 | 198 | */ |
dfefa935 | 199 | extern int check_refname_format(const char *refname, int flags); |
95fc7512 | 200 | |
4577e483 | 201 | extern const char *prettify_refname(const char *refname); |
dfefa935 | 202 | extern char *shorten_unambiguous_ref(const char *refname, int strict); |
a9c37a72 | 203 | |
c976d415 | 204 | /** rename ref, return 0 on success **/ |
678d0f4c | 205 | extern int rename_ref(const char *oldref, const char *newref, const char *logmsg); |
c976d415 | 206 | |
7f820bd9 MH |
207 | /** |
208 | * Resolve refname in the nested "gitlink" repository that is located | |
209 | * at path. If the resolution is successful, return 0 and set sha1 to | |
210 | * the name of the object; otherwise, return a non-zero value. | |
211 | */ | |
212 | extern int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1); | |
0ebde32c | 213 | |
f4124112 MH |
214 | enum action_on_err { |
215 | UPDATE_REFS_MSG_ON_ERR, | |
216 | UPDATE_REFS_DIE_ON_ERR, | |
217 | UPDATE_REFS_QUIET_ON_ERR | |
218 | }; | |
219 | ||
caa4046c MH |
220 | /* |
221 | * Begin a reference transaction. The reference transaction must | |
222 | * eventually be commited using ref_transaction_commit() or rolled | |
223 | * back using ref_transaction_rollback(). | |
224 | */ | |
225 | struct ref_transaction *ref_transaction_begin(void); | |
226 | ||
227 | /* | |
228 | * Roll back a ref_transaction and free all associated data. | |
229 | */ | |
230 | void ref_transaction_rollback(struct ref_transaction *transaction); | |
231 | ||
232 | ||
233 | /* | |
234 | * The following functions add a reference check or update to a | |
235 | * ref_transaction. In all of them, refname is the name of the | |
236 | * reference to be affected. The functions make internal copies of | |
237 | * refname, so the caller retains ownership of the parameter. flags | |
238 | * can be REF_NODEREF; it is passed to update_ref_lock(). | |
239 | */ | |
240 | ||
241 | ||
242 | /* | |
243 | * Add a reference update to transaction. new_sha1 is the value that | |
244 | * the reference should have after the update, or zeros if it should | |
245 | * be deleted. If have_old is true, then old_sha1 holds the value | |
246 | * that the reference should have had before the update, or zeros if | |
247 | * it must not have existed beforehand. | |
248 | */ | |
249 | void ref_transaction_update(struct ref_transaction *transaction, | |
250 | const char *refname, | |
251 | unsigned char *new_sha1, unsigned char *old_sha1, | |
252 | int flags, int have_old); | |
253 | ||
254 | /* | |
255 | * Add a reference creation to transaction. new_sha1 is the value | |
256 | * that the reference should have after the update; it must not be the | |
257 | * null SHA-1. It is verified that the reference does not exist | |
258 | * already. | |
259 | */ | |
260 | void ref_transaction_create(struct ref_transaction *transaction, | |
261 | const char *refname, | |
262 | unsigned char *new_sha1, | |
263 | int flags); | |
264 | ||
265 | /* | |
266 | * Add a reference deletion to transaction. If have_old is true, then | |
267 | * old_sha1 holds the value that the reference should have had before | |
268 | * the update (which must not be the null SHA-1). | |
269 | */ | |
270 | void ref_transaction_delete(struct ref_transaction *transaction, | |
271 | const char *refname, | |
272 | unsigned char *old_sha1, | |
273 | int flags, int have_old); | |
274 | ||
275 | /* | |
276 | * Commit all of the changes that have been queued in transaction, as | |
277 | * atomically as possible. Return a nonzero value if there is a | |
278 | * problem. The ref_transaction is freed by this function. | |
279 | */ | |
280 | int ref_transaction_commit(struct ref_transaction *transaction, | |
281 | const char *msg, enum action_on_err onerr); | |
282 | ||
f4124112 | 283 | /** Lock a ref and then write its file */ |
3d9f037c CR |
284 | int update_ref(const char *action, const char *refname, |
285 | const unsigned char *sha1, const unsigned char *oldval, | |
286 | int flags, enum action_on_err onerr); | |
287 | ||
daebaa78 JH |
288 | extern int parse_hide_refs_config(const char *var, const char *value, const char *); |
289 | extern int ref_is_hidden(const char *); | |
290 | ||
95fc7512 | 291 | #endif /* REFS_H */ |