| #ifndef REFS_H |
| #define REFS_H |
| |
| struct object_id; |
| struct ref_store; |
| struct strbuf; |
| struct string_list; |
| struct worktree; |
| |
| /* |
| * Resolve a reference, recursively following symbolic refererences. |
| * |
| * Return the name of the non-symbolic reference that ultimately pointed |
| * at the resolved object name. The return value, if not NULL, is a |
| * pointer into either a static buffer or the input ref. |
| * |
| * If oid is non-NULL, store the referred-to object's name in it. |
| * |
| * If the reference cannot be resolved to an object, the behavior |
| * depends on the RESOLVE_REF_READING flag: |
| * |
| * - If RESOLVE_REF_READING is set, return NULL. |
| * |
| * - If RESOLVE_REF_READING is not set, clear oid and return the name of |
| * the last reference name in the chain, which will either be a non-symbolic |
| * reference or an undefined reference. If this is a prelude to |
| * "writing" to the ref, the return value is the name of the ref |
| * that will actually be created or changed. |
| * |
| * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one |
| * level of symbolic reference. The value stored in oid for a symbolic |
| * reference will always be null_oid in this case, and the return |
| * value is the reference that the symref refers to directly. |
| * |
| * If flags is non-NULL, set the value that it points to the |
| * combination of REF_ISPACKED (if the reference was found among the |
| * packed references), REF_ISSYMREF (if the initial reference was a |
| * symbolic reference), REF_BAD_NAME (if the reference name is ill |
| * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN |
| * (if the ref is malformed or has a bad name). See refs.h for more detail |
| * on each flag. |
| * |
| * If ref is not a properly-formatted, normalized reference, return |
| * NULL. If more than MAXDEPTH recursive symbolic lookups are needed, |
| * give up and return NULL. |
| * |
| * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their |
| * name is invalid according to git-check-ref-format(1). If the name |
| * is bad then the value stored in oid will be null_oid and the two |
| * flags REF_ISBROKEN and REF_BAD_NAME will be set. |
| * |
| * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/ |
| * directory and do not consist of all caps and underscores cannot be |
| * resolved. The function returns NULL for such ref names. |
| * Caps and underscores refers to the special refs, such as HEAD, |
| * FETCH_HEAD and friends, that all live outside of the refs/ directory. |
| */ |
| #define RESOLVE_REF_READING 0x01 |
| #define RESOLVE_REF_NO_RECURSE 0x02 |
| #define RESOLVE_REF_ALLOW_BAD_NAME 0x04 |
| |
| const char *refs_resolve_ref_unsafe(struct ref_store *refs, |
| const char *refname, |
| int resolve_flags, |
| struct object_id *oid, |
| int *flags); |
| const char *resolve_ref_unsafe(const char *refname, int resolve_flags, |
| struct object_id *oid, int *flags); |
| |
| char *refs_resolve_refdup(struct ref_store *refs, |
| const char *refname, int resolve_flags, |
| struct object_id *oid, int *flags); |
| char *resolve_refdup(const char *refname, int resolve_flags, |
| struct object_id *oid, int *flags); |
| |
| int refs_read_ref_full(struct ref_store *refs, const char *refname, |
| int resolve_flags, struct object_id *oid, int *flags); |
| int read_ref_full(const char *refname, int resolve_flags, |
| struct object_id *oid, int *flags); |
| int read_ref(const char *refname, struct object_id *oid); |
| |
| /* |
| * Return 0 if a reference named refname could be created without |
| * conflicting with the name of an existing reference. Otherwise, |
| * return a negative value and write an explanation to err. If extras |
| * is non-NULL, it is a list of additional refnames with which refname |
| * is not allowed to conflict. If skip is non-NULL, ignore potential |
| * conflicts with refs in skip (e.g., because they are scheduled for |
| * deletion in the same operation). Behavior is undefined if the same |
| * name is listed in both extras and skip. |
| * |
| * Two reference names conflict if one of them exactly matches the |
| * leading components of the other; e.g., "foo/bar" conflicts with |
| * both "foo" and with "foo/bar/baz" but not with "foo/bar" or |
| * "foo/barbados". |
| * |
| * extras and skip must be sorted. |
| */ |
| |
| int refs_verify_refname_available(struct ref_store *refs, |
| const char *refname, |
| const struct string_list *extras, |
| const struct string_list *skip, |
| struct strbuf *err); |
| |
| int ref_exists(const char *refname); |
| |
| int should_autocreate_reflog(const char *refname); |
| |
| int is_branch(const char *refname); |
| |
| extern int refs_init_db(struct strbuf *err); |
| |
| /* |
| * If refname is a non-symbolic reference that refers to a tag object, |
| * and the tag can be (recursively) dereferenced to a non-tag object, |
| * store the object ID of the referred-to object to oid and return 0. |
| * If any of these conditions are not met, return a non-zero value. |
| * Symbolic references are considered unpeelable, even if they |
| * ultimately resolve to a peelable tag. |
| */ |
| int refs_peel_ref(struct ref_store *refs, const char *refname, |
| struct object_id *oid); |
| int peel_ref(const char *refname, struct object_id *oid); |
| |
| /** |
| * Resolve refname in the nested "gitlink" repository in the specified |
| * submodule (which must be non-NULL). If the resolution is |
| * successful, return 0 and set oid to the name of the object; |
| * otherwise, return a non-zero value. |
| */ |
| int resolve_gitlink_ref(const char *submodule, const char *refname, |
| struct object_id *oid); |
| |
| /* |
| * Return true iff abbrev_name is a possible abbreviation for |
| * full_name according to the rules defined by ref_rev_parse_rules in |
| * refs.c. |
| */ |
| int refname_match(const char *abbrev_name, const char *full_name); |
| |
| int expand_ref(const char *str, int len, struct object_id *oid, char **ref); |
| int dwim_ref(const char *str, int len, struct object_id *oid, char **ref); |
| int dwim_log(const char *str, int len, struct object_id *oid, char **ref); |
| |
| /* |
| * A ref_transaction represents a collection of reference updates that |
| * should succeed or fail together. |
| * |
| * Calling sequence |
| * ---------------- |
| * |
| * - Allocate and initialize a `struct ref_transaction` by calling |
| * `ref_transaction_begin()`. |
| * |
| * - Specify the intended ref updates by calling one or more of the |
| * following functions: |
| * - `ref_transaction_update()` |
| * - `ref_transaction_create()` |
| * - `ref_transaction_delete()` |
| * - `ref_transaction_verify()` |
| * |
| * - Then either: |
| * |
| * - Optionally call `ref_transaction_prepare()` to prepare the |
| * transaction. This locks all references, checks preconditions, |
| * etc. but doesn't finalize anything. If this step fails, the |
| * transaction has been closed and can only be freed. If this step |
| * succeeds, then `ref_transaction_commit()` is almost certain to |
| * succeed. However, you can still call `ref_transaction_abort()` |
| * if you decide not to commit the transaction after all. |
| * |
| * - Call `ref_transaction_commit()` to execute the transaction, |
| * make the changes permanent, and release all locks. If you |
| * haven't already called `ref_transaction_prepare()`, then |
| * `ref_transaction_commit()` calls it for you. |
| * |
| * Or |
| * |
| * - Call `initial_ref_transaction_commit()` if the ref database is |
| * known to be empty and have no other writers (e.g. during |
| * clone). This is likely to be much faster than |
| * `ref_transaction_commit()`. `ref_transaction_prepare()` should |
| * *not* be called before `initial_ref_transaction_commit()`. |
| * |
| * - Then finally, call `ref_transaction_free()` to free the |
| * `ref_transaction` data structure. |
| * |
| * At any time before calling `ref_transaction_commit()`, you can call |
| * `ref_transaction_abort()` to abort the transaction, rollback any |
| * locks, and free any associated resources (including the |
| * `ref_transaction` data structure). |
| * |
| * Putting it all together, a complete reference update looks like |
| * |
| * struct ref_transaction *transaction; |
| * struct strbuf err = STRBUF_INIT; |
| * int ret = 0; |
| * |
| * transaction = ref_store_transaction_begin(refs, &err); |
| * if (!transaction || |
| * ref_transaction_update(...) || |
| * ref_transaction_create(...) || |
| * ...etc... || |
| * ref_transaction_commit(transaction, &err)) { |
| * error("%s", err.buf); |
| * ret = -1; |
| * } |
| * ref_transaction_free(transaction); |
| * strbuf_release(&err); |
| * return ret; |
| * |
| * Error handling |
| * -------------- |
| * |
| * On error, transaction functions append a message about what |
| * went wrong to the 'err' argument. The message mentions what |
| * ref was being updated (if any) when the error occurred so it |
| * can be passed to 'die' or 'error' as-is. |
| * |
| * The message is appended to err without first clearing err. |
| * err will not be '\n' terminated. |
| * |
| * Caveats |
| * ------- |
| * |
| * Note that no locks are taken, and no refs are read, until |
| * `ref_transaction_prepare()` or `ref_transaction_commit()` is |
| * called. So, for example, `ref_transaction_verify()` won't report a |
| * verification failure until the commit is attempted. |
| */ |
| struct ref_transaction; |
| |
| /* |
| * Bit values set in the flags argument passed to each_ref_fn() and |
| * stored in ref_iterator::flags. Other bits are for internal use |
| * only: |
| */ |
| |
| /* Reference is a symbolic reference. */ |
| #define REF_ISSYMREF 0x01 |
| |
| /* Reference is a packed reference. */ |
| #define REF_ISPACKED 0x02 |
| |
| /* |
| * Reference cannot be resolved to an object name: dangling symbolic |
| * reference (directly or indirectly), corrupt reference file, |
| * reference exists but name is bad, or symbolic reference refers to |
| * ill-formatted reference name. |
| */ |
| #define REF_ISBROKEN 0x04 |
| |
| /* |
| * Reference name is not well formed. |
| * |
| * See git-check-ref-format(1) for the definition of well formed ref names. |
| */ |
| #define REF_BAD_NAME 0x08 |
| |
| /* |
| * The signature for the callback function for the for_each_*() |
| * functions below. The memory pointed to by the refname and oid |
| * arguments is only guaranteed to be valid for the duration of a |
| * single callback invocation. |
| */ |
| typedef int each_ref_fn(const char *refname, |
| const struct object_id *oid, int flags, void *cb_data); |
| |
| /* |
| * The following functions invoke the specified callback function for |
| * each reference indicated. If the function ever returns a nonzero |
| * value, stop the iteration and return that value. Please note that |
| * it is not safe to modify references while an iteration is in |
| * progress, unless the same callback function invocation that |
| * modifies the reference also returns a nonzero value to immediately |
| * stop the iteration. Returned references are sorted. |
| */ |
| int refs_head_ref(struct ref_store *refs, |
| each_ref_fn fn, void *cb_data); |
| int refs_for_each_ref(struct ref_store *refs, |
| each_ref_fn fn, void *cb_data); |
| int refs_for_each_ref_in(struct ref_store *refs, const char *prefix, |
| each_ref_fn fn, void *cb_data); |
| int refs_for_each_tag_ref(struct ref_store *refs, |
| each_ref_fn fn, void *cb_data); |
| int refs_for_each_branch_ref(struct ref_store *refs, |
| each_ref_fn fn, void *cb_data); |
| int refs_for_each_remote_ref(struct ref_store *refs, |
| each_ref_fn fn, void *cb_data); |
| |
| int head_ref(each_ref_fn fn, void *cb_data); |
| int for_each_ref(each_ref_fn fn, void *cb_data); |
| int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data); |
| int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix, |
| each_ref_fn fn, void *cb_data, |
| unsigned int broken); |
| int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, |
| unsigned int broken); |
| int for_each_tag_ref(each_ref_fn fn, void *cb_data); |
| int for_each_branch_ref(each_ref_fn fn, void *cb_data); |
| int for_each_remote_ref(each_ref_fn fn, void *cb_data); |
| int for_each_replace_ref(each_ref_fn fn, void *cb_data); |
| int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data); |
| int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
| const char *prefix, void *cb_data); |
| |
| int head_ref_namespaced(each_ref_fn fn, void *cb_data); |
| int for_each_namespaced_ref(each_ref_fn fn, void *cb_data); |
| |
| /* can be used to learn about broken ref and symref */ |
| int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data); |
| int for_each_rawref(each_ref_fn fn, void *cb_data); |
| |
| /* |
| * Normalizes partial refs to their fully qualified form. |
| * Will prepend <prefix> to the <pattern> if it doesn't start with 'refs/'. |
| * <prefix> will default to 'refs/' if NULL. |
| * |
| * item.string will be set to the result. |
| * item.util will be set to NULL if <pattern> contains glob characters, or |
| * non-NULL if it doesn't. |
| */ |
| void normalize_glob_ref(struct string_list_item *item, const char *prefix, |
| const char *pattern); |
| |
| /* |
| * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't |
| * match any of the include_patterns. Returns 1 otherwise. |
| * |
| * If pattern list is NULL or empty, matching against that list is skipped. |
| * This has the effect of matching everything by default, unless the user |
| * specifies rules otherwise. |
| */ |
| int ref_filter_match(const char *refname, |
| const struct string_list *include_patterns, |
| const struct string_list *exclude_patterns); |
| |
| static inline const char *has_glob_specials(const char *pattern) |
| { |
| return strpbrk(pattern, "?*["); |
| } |
| |
| void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname); |
| void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, |
| const struct string_list *refnames); |
| |
| /* |
| * Flags for controlling behaviour of pack_refs() |
| * PACK_REFS_PRUNE: Prune loose refs after packing |
| * PACK_REFS_ALL: Pack _all_ refs, not just tags and already packed refs |
| */ |
| #define PACK_REFS_PRUNE 0x0001 |
| #define PACK_REFS_ALL 0x0002 |
| |
| /* |
| * Write a packed-refs file for the current repository. |
| * flags: Combination of the above PACK_REFS_* flags. |
| */ |
| int refs_pack_refs(struct ref_store *refs, unsigned int flags); |
| |
| /* |
| * Setup reflog before using. Fill in err and return -1 on failure. |
| */ |
| int refs_create_reflog(struct ref_store *refs, const char *refname, |
| int force_create, struct strbuf *err); |
| int safe_create_reflog(const char *refname, int force_create, struct strbuf *err); |
| |
| /** Reads log for the value of ref during at_time. **/ |
| int read_ref_at(const char *refname, unsigned int flags, |
| timestamp_t at_time, int cnt, |
| struct object_id *oid, char **msg, |
| timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt); |
| |
| /** Check if a particular reflog exists */ |
| int refs_reflog_exists(struct ref_store *refs, const char *refname); |
| int reflog_exists(const char *refname); |
| |
| /* |
| * Delete the specified reference. If old_oid is non-NULL, then |
| * verify that the current value of the reference is old_oid before |
| * deleting it. If old_oid is NULL, delete the reference if it |
| * exists, regardless of its old value. It is an error for old_oid to |
| * be null_oid. msg and flags are passed through to |
| * ref_transaction_delete(). |
| */ |
| int refs_delete_ref(struct ref_store *refs, const char *msg, |
| const char *refname, |
| const struct object_id *old_oid, |
| unsigned int flags); |
| int delete_ref(const char *msg, const char *refname, |
| const struct object_id *old_oid, unsigned int flags); |
| |
| /* |
| * Delete the specified references. If there are any problems, emit |
| * errors but attempt to keep going (i.e., the deletes are not done in |
| * an all-or-nothing transaction). msg and flags are passed through to |
| * ref_transaction_delete(). |
| */ |
| int refs_delete_refs(struct ref_store *refs, const char *msg, |
| struct string_list *refnames, unsigned int flags); |
| int delete_refs(const char *msg, struct string_list *refnames, |
| unsigned int flags); |
| |
| /** Delete a reflog */ |
| int refs_delete_reflog(struct ref_store *refs, const char *refname); |
| int delete_reflog(const char *refname); |
| |
| /* iterate over reflog entries */ |
| typedef int each_reflog_ent_fn( |
| struct object_id *old_oid, struct object_id *new_oid, |
| const char *committer, timestamp_t timestamp, |
| int tz, const char *msg, void *cb_data); |
| |
| int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname, |
| each_reflog_ent_fn fn, void *cb_data); |
| int refs_for_each_reflog_ent_reverse(struct ref_store *refs, |
| const char *refname, |
| each_reflog_ent_fn fn, |
| void *cb_data); |
| int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
| int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data); |
| |
| /* |
| * Calls the specified function for each reflog file until it returns nonzero, |
| * and returns the value. Reflog file order is unspecified. |
| */ |
| int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data); |
| int for_each_reflog(each_ref_fn fn, void *cb_data); |
| |
| #define REFNAME_ALLOW_ONELEVEL 1 |
| #define REFNAME_REFSPEC_PATTERN 2 |
| |
| /* |
| * Return 0 iff refname has the correct format for a refname according |
| * to the rules described in Documentation/git-check-ref-format.txt. |
| * If REFNAME_ALLOW_ONELEVEL is set in flags, then accept one-level |
| * reference names. If REFNAME_REFSPEC_PATTERN is set in flags, then |
| * allow a single "*" wildcard character in the refspec. No leading or |
| * repeated slashes are accepted. |
| */ |
| int check_refname_format(const char *refname, int flags); |
| |
| const char *prettify_refname(const char *refname); |
| |
| char *shorten_unambiguous_ref(const char *refname, int strict); |
| |
| /** rename ref, return 0 on success **/ |
| int refs_rename_ref(struct ref_store *refs, const char *oldref, |
| const char *newref, const char *logmsg); |
| int rename_ref(const char *oldref, const char *newref, |
| const char *logmsg); |
| |
| /** copy ref, return 0 on success **/ |
| int refs_copy_existing_ref(struct ref_store *refs, const char *oldref, |
| const char *newref, const char *logmsg); |
| int copy_existing_ref(const char *oldref, const char *newref, |
| const char *logmsg); |
| |
| int refs_create_symref(struct ref_store *refs, const char *refname, |
| const char *target, const char *logmsg); |
| int create_symref(const char *refname, const char *target, const char *logmsg); |
| |
| enum action_on_err { |
| UPDATE_REFS_MSG_ON_ERR, |
| UPDATE_REFS_DIE_ON_ERR, |
| UPDATE_REFS_QUIET_ON_ERR |
| }; |
| |
| /* |
| * Begin a reference transaction. The reference transaction must |
| * be freed by calling ref_transaction_free(). |
| */ |
| struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs, |
| struct strbuf *err); |
| struct ref_transaction *ref_transaction_begin(struct strbuf *err); |
| |
| /* |
| * Reference transaction updates |
| * |
| * The following four functions add a reference check or update to a |
| * ref_transaction. They have some common similar parameters: |
| * |
| * transaction -- a pointer to an open ref_transaction, obtained |
| * from ref_transaction_begin(). |
| * |
| * refname -- the name of the reference to be affected. |
| * |
| * new_oid -- the object ID that should be set to be the new value |
| * of the reference. Some functions allow this parameter to be |
| * NULL, meaning that the reference is not changed, or |
| * null_oid, meaning that the reference should be deleted. A |
| * copy of this value is made in the transaction. |
| * |
| * old_oid -- the object ID that the reference must have before |
| * the update. Some functions allow this parameter to be NULL, |
| * meaning that the old value of the reference is not checked, |
| * or null_oid, meaning that the reference must not exist |
| * before the update. A copy of this value is made in the |
| * transaction. |
| * |
| * flags -- flags affecting the update, passed to |
| * update_ref_lock(). Possible flags: REF_NO_DEREF, |
| * REF_FORCE_CREATE_REFLOG. See those constants for more |
| * information. |
| * |
| * msg -- a message describing the change (for the reflog). |
| * |
| * err -- a strbuf for receiving a description of any error that |
| * might have occurred. |
| * |
| * The functions make internal copies of refname and msg, so the |
| * caller retains ownership of these parameters. |
| * |
| * The functions return 0 on success and non-zero on failure. A |
| * failure means that the transaction as a whole has failed and needs |
| * to be rolled back. |
| */ |
| |
| /* |
| * The following flags can be passed to ref_transaction_update() etc. |
| * Internally, they are stored in `ref_update::flags`, along with some |
| * internal flags. |
| */ |
| |
| /* |
| * Act on the ref directly; i.e., without dereferencing symbolic refs. |
| * If this flag is not specified, then symbolic references are |
| * dereferenced and the update is applied to the referent. |
| */ |
| #define REF_NO_DEREF (1 << 0) |
| |
| /* |
| * Force the creation of a reflog for this reference, even if it |
| * didn't previously have a reflog. |
| */ |
| #define REF_FORCE_CREATE_REFLOG (1 << 1) |
| |
| /* |
| * Bitmask of all of the flags that are allowed to be passed in to |
| * ref_transaction_update() and friends: |
| */ |
| #define REF_TRANSACTION_UPDATE_ALLOWED_FLAGS \ |
| (REF_NO_DEREF | REF_FORCE_CREATE_REFLOG) |
| |
| /* |
| * Add a reference update to transaction. `new_oid` is the value that |
| * the reference should have after the update, or `null_oid` if it |
| * should be deleted. If `new_oid` is NULL, then the reference is not |
| * changed at all. `old_oid` is the value that the reference must have |
| * before the update, or `null_oid` if it must not have existed |
| * beforehand. The old value is checked after the lock is taken to |
| * prevent races. If the old value doesn't agree with old_oid, the |
| * whole transaction fails. If old_oid is NULL, then the previous |
| * value is not checked. |
| * |
| * See the above comment "Reference transaction updates" for more |
| * information. |
| */ |
| int ref_transaction_update(struct ref_transaction *transaction, |
| const char *refname, |
| const struct object_id *new_oid, |
| const struct object_id *old_oid, |
| unsigned int flags, const char *msg, |
| struct strbuf *err); |
| |
| /* |
| * Add a reference creation to transaction. new_oid is the value that |
| * the reference should have after the update; it must not be |
| * null_oid. It is verified that the reference does not exist |
| * already. |
| * |
| * See the above comment "Reference transaction updates" for more |
| * information. |
| */ |
| int ref_transaction_create(struct ref_transaction *transaction, |
| const char *refname, |
| const struct object_id *new_oid, |
| unsigned int flags, const char *msg, |
| struct strbuf *err); |
| |
| /* |
| * Add a reference deletion to transaction. If old_oid is non-NULL, |
| * then it holds the value that the reference should have had before |
| * the update (which must not be null_oid). |
| * |
| * See the above comment "Reference transaction updates" for more |
| * information. |
| */ |
| int ref_transaction_delete(struct ref_transaction *transaction, |
| const char *refname, |
| const struct object_id *old_oid, |
| unsigned int flags, const char *msg, |
| struct strbuf *err); |
| |
| /* |
| * Verify, within a transaction, that refname has the value old_oid, |
| * or, if old_oid is null_oid, then verify that the reference |
| * doesn't exist. old_oid must be non-NULL. |
| * |
| * See the above comment "Reference transaction updates" for more |
| * information. |
| */ |
| int ref_transaction_verify(struct ref_transaction *transaction, |
| const char *refname, |
| const struct object_id *old_oid, |
| unsigned int flags, |
| struct strbuf *err); |
| |
| /* Naming conflict (for example, the ref names A and A/B conflict). */ |
| #define TRANSACTION_NAME_CONFLICT -1 |
| /* All other errors. */ |
| #define TRANSACTION_GENERIC_ERROR -2 |
| |
| /* |
| * Perform the preparatory stages of committing `transaction`. Acquire |
| * any needed locks, check preconditions, etc.; basically, do as much |
| * as possible to ensure that the transaction will be able to go |
| * through, stopping just short of making any irrevocable or |
| * user-visible changes. The updates that this function prepares can |
| * be finished up by calling `ref_transaction_commit()` or rolled back |
| * by calling `ref_transaction_abort()`. |
| * |
| * On success, return 0 and leave the transaction in "prepared" state. |
| * On failure, abort the transaction, write an error message to `err`, |
| * and return one of the `TRANSACTION_*` constants. |
| * |
| * Callers who don't need such fine-grained control over committing |
| * reference transactions should just call `ref_transaction_commit()`. |
| */ |
| int ref_transaction_prepare(struct ref_transaction *transaction, |
| struct strbuf *err); |
| |
| /* |
| * Commit all of the changes that have been queued in transaction, as |
| * atomically as possible. On success, return 0 and leave the |
| * transaction in "closed" state. On failure, roll back the |
| * transaction, write an error message to `err`, and return one of the |
| * `TRANSACTION_*` constants |
| */ |
| int ref_transaction_commit(struct ref_transaction *transaction, |
| struct strbuf *err); |
| |
| /* |
| * Abort `transaction`, which has been begun and possibly prepared, |
| * but not yet committed. |
| */ |
| int ref_transaction_abort(struct ref_transaction *transaction, |
| struct strbuf *err); |
| |
| /* |
| * Like ref_transaction_commit(), but optimized for creating |
| * references when originally initializing a repository (e.g., by "git |
| * clone"). It writes the new references directly to packed-refs |
| * without locking the individual references. |
| * |
| * It is a bug to call this function when there might be other |
| * processes accessing the repository or if there are existing |
| * references that might conflict with the ones being created. All |
| * old_oid values must either be absent or null_oid. |
| */ |
| int initial_ref_transaction_commit(struct ref_transaction *transaction, |
| struct strbuf *err); |
| |
| /* |
| * Free `*transaction` and all associated data. |
| */ |
| void ref_transaction_free(struct ref_transaction *transaction); |
| |
| /** |
| * Lock, update, and unlock a single reference. This function |
| * basically does a transaction containing a single call to |
| * ref_transaction_update(). The parameters to this function have the |
| * same meaning as the corresponding parameters to |
| * ref_transaction_update(). Handle errors as requested by the `onerr` |
| * argument. |
| */ |
| int refs_update_ref(struct ref_store *refs, const char *msg, const char *refname, |
| const struct object_id *new_oid, const struct object_id *old_oid, |
| unsigned int flags, enum action_on_err onerr); |
| int update_ref(const char *msg, const char *refname, |
| const struct object_id *new_oid, const struct object_id *old_oid, |
| unsigned int flags, enum action_on_err onerr); |
| |
| int parse_hide_refs_config(const char *var, const char *value, const char *); |
| |
| /* |
| * Check whether a ref is hidden. If no namespace is set, both the first and |
| * the second parameter point to the full ref name. If a namespace is set and |
| * the ref is inside that namespace, the first parameter is a pointer to the |
| * name of the ref with the namespace prefix removed. If a namespace is set and |
| * the ref is outside that namespace, the first parameter is NULL. The second |
| * parameter always points to the full ref name. |
| */ |
| int ref_is_hidden(const char *, const char *); |
| |
| enum ref_type { |
| REF_TYPE_PER_WORKTREE, |
| REF_TYPE_PSEUDOREF, |
| REF_TYPE_NORMAL, |
| }; |
| |
| enum ref_type ref_type(const char *refname); |
| |
| enum expire_reflog_flags { |
| EXPIRE_REFLOGS_DRY_RUN = 1 << 0, |
| EXPIRE_REFLOGS_UPDATE_REF = 1 << 1, |
| EXPIRE_REFLOGS_VERBOSE = 1 << 2, |
| EXPIRE_REFLOGS_REWRITE = 1 << 3 |
| }; |
| |
| /* |
| * The following interface is used for reflog expiration. The caller |
| * calls reflog_expire(), supplying it with three callback functions, |
| * of the following types. The callback functions define the |
| * expiration policy that is desired. |
| * |
| * reflog_expiry_prepare_fn -- Called once after the reference is |
| * locked. |
| * |
| * reflog_expiry_should_prune_fn -- Called once for each entry in the |
| * existing reflog. It should return true iff that entry should be |
| * pruned. |
| * |
| * reflog_expiry_cleanup_fn -- Called once before the reference is |
| * unlocked again. |
| */ |
| typedef void reflog_expiry_prepare_fn(const char *refname, |
| const struct object_id *oid, |
| void *cb_data); |
| typedef int reflog_expiry_should_prune_fn(struct object_id *ooid, |
| struct object_id *noid, |
| const char *email, |
| timestamp_t timestamp, int tz, |
| const char *message, void *cb_data); |
| typedef void reflog_expiry_cleanup_fn(void *cb_data); |
| |
| /* |
| * Expire reflog entries for the specified reference. oid is the old |
| * value of the reference. flags is a combination of the constants in |
| * enum expire_reflog_flags. The three function pointers are described |
| * above. On success, return zero. |
| */ |
| int refs_reflog_expire(struct ref_store *refs, |
| const char *refname, |
| const struct object_id *oid, |
| unsigned int flags, |
| reflog_expiry_prepare_fn prepare_fn, |
| reflog_expiry_should_prune_fn should_prune_fn, |
| reflog_expiry_cleanup_fn cleanup_fn, |
| void *policy_cb_data); |
| int reflog_expire(const char *refname, const struct object_id *oid, |
| unsigned int flags, |
| reflog_expiry_prepare_fn prepare_fn, |
| reflog_expiry_should_prune_fn should_prune_fn, |
| reflog_expiry_cleanup_fn cleanup_fn, |
| void *policy_cb_data); |
| |
| int ref_storage_backend_exists(const char *name); |
| |
| struct ref_store *get_main_ref_store(void); |
| /* |
| * Return the ref_store instance for the specified submodule. For the |
| * main repository, use submodule==NULL; such a call cannot fail. For |
| * a submodule, the submodule must exist and be a nonbare repository, |
| * otherwise return NULL. If the requested reference store has not yet |
| * been initialized, initialize it first. |
| * |
| * For backwards compatibility, submodule=="" is treated the same as |
| * submodule==NULL. |
| */ |
| struct ref_store *get_submodule_ref_store(const char *submodule); |
| struct ref_store *get_worktree_ref_store(const struct worktree *wt); |
| |
| #endif /* REFS_H */ |