diff options
Diffstat (limited to 'refs.c')
| -rw-r--r-- | refs.c | 142 |
1 files changed, 94 insertions, 48 deletions
@@ -3,6 +3,7 @@ */ #include "cache.h" +#include "hashmap.h" #include "lockfile.h" #include "refs.h" #include "refs/refs-internal.h" @@ -591,8 +592,8 @@ static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1 return 0; } -int delete_ref(const char *refname, const unsigned char *old_sha1, - unsigned int flags) +int delete_ref(const char *msg, const char *refname, + const unsigned char *old_sha1, unsigned int flags) { struct ref_transaction *transaction; struct strbuf err = STRBUF_INIT; @@ -603,7 +604,7 @@ int delete_ref(const char *refname, const unsigned char *old_sha1, transaction = ref_transaction_begin(&err); if (!transaction || ref_transaction_delete(transaction, refname, old_sha1, - flags, NULL, &err) || + flags, msg, &err) || ref_transaction_commit(transaction, &err)) { error("%s", err.buf); ref_transaction_free(transaction); @@ -638,12 +639,17 @@ int copy_reflog_msg(char *buf, const char *msg) int should_autocreate_reflog(const char *refname) { - if (!log_all_ref_updates) + switch (log_all_ref_updates) { + case LOG_REFS_ALWAYS: + return 1; + case LOG_REFS_NORMAL: + return starts_with(refname, "refs/heads/") || + starts_with(refname, "refs/remotes/") || + starts_with(refname, "refs/notes/") || + !strcmp(refname, "HEAD"); + default: return 0; - return starts_with(refname, "refs/heads/") || - starts_with(refname, "refs/remotes/") || - starts_with(refname, "refs/notes/") || - !strcmp(refname, "HEAD"); + } } int is_branch(const char *refname) @@ -1230,10 +1236,10 @@ int for_each_rawref(each_ref_fn fn, void *cb_data) } /* This function needs to return a meaningful errno on failure */ -static const char *resolve_ref_recursively(struct ref_store *refs, - const char *refname, - int resolve_flags, - unsigned char *sha1, int *flags) +const char *resolve_ref_recursively(struct ref_store *refs, + const char *refname, + int resolve_flags, + unsigned char *sha1, int *flags) { static struct strbuf sb_refname = STRBUF_INIT; int unused_flags; @@ -1353,62 +1359,102 @@ int resolve_gitlink_ref(const char *submodule, const char *refname, return 0; } +struct submodule_hash_entry +{ + struct hashmap_entry ent; /* must be the first member! */ + + struct ref_store *refs; + + /* NUL-terminated name of submodule: */ + char submodule[FLEX_ARRAY]; +}; + +static int submodule_hash_cmp(const void *entry, const void *entry_or_key, + const void *keydata) +{ + const struct submodule_hash_entry *e1 = entry, *e2 = entry_or_key; + const char *submodule = keydata ? keydata : e2->submodule; + + return strcmp(e1->submodule, submodule); +} + +static struct submodule_hash_entry *alloc_submodule_hash_entry( + const char *submodule, struct ref_store *refs) +{ + struct submodule_hash_entry *entry; + + FLEX_ALLOC_STR(entry, submodule, submodule); + hashmap_entry_init(entry, strhash(submodule)); + entry->refs = refs; + return entry; +} + /* A pointer to the ref_store for the main repository: */ static struct ref_store *main_ref_store; -/* A linked list of ref_stores for submodules: */ -static struct ref_store *submodule_ref_stores; +/* A hashmap of ref_stores, stored by submodule name: */ +static struct hashmap submodule_ref_stores; -void base_ref_store_init(struct ref_store *refs, - const struct ref_storage_be *be, - const char *submodule) +/* + * Return the ref_store instance for the specified submodule (or the + * main repository if submodule is NULL). If that ref_store hasn't + * been initialized yet, return NULL. + */ +static struct ref_store *lookup_ref_store(const char *submodule) +{ + struct submodule_hash_entry *entry; + + if (!submodule) + return main_ref_store; + + if (!submodule_ref_stores.tablesize) + /* It's initialized on demand in register_ref_store(). */ + return NULL; + + entry = hashmap_get_from_hash(&submodule_ref_stores, + strhash(submodule), submodule); + return entry ? entry->refs : NULL; +} + +/* + * Register the specified ref_store to be the one that should be used + * for submodule (or the main repository if submodule is NULL). It is + * a fatal error to call this function twice for the same submodule. + */ +static void register_ref_store(struct ref_store *refs, const char *submodule) { - refs->be = be; if (!submodule) { if (main_ref_store) die("BUG: main_ref_store initialized twice"); - refs->submodule = ""; - refs->next = NULL; main_ref_store = refs; } else { - if (lookup_ref_store(submodule)) + if (!submodule_ref_stores.tablesize) + hashmap_init(&submodule_ref_stores, submodule_hash_cmp, 0); + + if (hashmap_put(&submodule_ref_stores, + alloc_submodule_hash_entry(submodule, refs))) die("BUG: ref_store for submodule '%s' initialized twice", submodule); - - refs->submodule = xstrdup(submodule); - refs->next = submodule_ref_stores; - submodule_ref_stores = refs; } } -struct ref_store *ref_store_init(const char *submodule) +/* + * Create, record, and return a ref_store instance for the specified + * submodule (or the main repository if submodule is NULL). + */ +static struct ref_store *ref_store_init(const char *submodule) { const char *be_name = "files"; struct ref_storage_be *be = find_ref_storage_backend(be_name); + struct ref_store *refs; if (!be) die("BUG: reference backend %s is unknown", be_name); - if (!submodule || !*submodule) - return be->init(NULL); - else - return be->init(submodule); -} - -struct ref_store *lookup_ref_store(const char *submodule) -{ - struct ref_store *refs; - - if (!submodule || !*submodule) - return main_ref_store; - - for (refs = submodule_ref_stores; refs; refs = refs->next) { - if (!strcmp(submodule, refs->submodule)) - return refs; - } - - return NULL; + refs = be->init(submodule); + register_ref_store(refs, submodule); + return refs; } struct ref_store *get_ref_store(const char *submodule) @@ -1436,10 +1482,10 @@ struct ref_store *get_ref_store(const char *submodule) return refs; } -void assert_main_repository(struct ref_store *refs, const char *caller) +void base_ref_store_init(struct ref_store *refs, + const struct ref_storage_be *be) { - if (*refs->submodule) - die("BUG: %s called for a submodule", caller); + refs->be = be; } /* backend functions */ |