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refs: rename struct ref_cache to files_ref_store

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The greater goal of this patch series is to develop the concept of a
reference store, which is a place that references, their values, and
their reflogs are stored, and to virtualize the reference interface so
that different types of ref_stores can be implemented. We will then, for
example, use ref_store instances to access submodule references and
worktree references.

Currently, we keep a ref_cache for each submodule that has had its
references iterated over. It is a far cry from a ref_store, but they are
stored the way we will want to store ref_stores, and ref_stores will
eventually have to hold the reference caches. So let's treat ref_caches
as embryo ref_stores, and build them out from there.

As the first step, simply rename `ref_cache` to `files_ref_store`, and
rename some functions and attributes correspondingly.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2016-09-04 18:08:09 +02:00 committed by Junio C Hamano
parent ff3a299c45
commit 65a0a8e5fa
1 changed files with 63 additions and 63 deletions
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126
refs/files-backend.c
View File

@ -39,7 +39,7 @@ struct ref_value {
struct object_id peeled;
};
struct ref_cache;
struct files_ref_store;
/*
* Information used (along with the information in ref_entry) to
@ -78,8 +78,8 @@ struct ref_dir {
*/
int sorted;
/* A pointer to the ref_cache that contains this ref_dir. */
struct ref_cache *ref_cache;
/* A pointer to the files_ref_store that contains this ref_dir. */
struct files_ref_store *ref_store;
struct ref_entry **entries;
};
@ -161,7 +161,7 @@ struct ref_entry {
static void read_loose_refs(const char *dirname, struct ref_dir *dir);
static int search_ref_dir(struct ref_dir *dir, const char *refname, size_t len);
static struct ref_entry *create_dir_entry(struct ref_cache *ref_cache,
static struct ref_entry *create_dir_entry(struct files_ref_store *ref_store,
const char *dirname, size_t len,
int incomplete);
static void add_entry_to_dir(struct ref_dir *dir, struct ref_entry *entry);
@ -183,7 +183,7 @@ static struct ref_dir *get_ref_dir(struct ref_entry *entry)
int pos = search_ref_dir(dir, "refs/bisect/", 12);
if (pos < 0) {
struct ref_entry *child_entry;
child_entry = create_dir_entry(dir->ref_cache,
child_entry = create_dir_entry(dir->ref_store,
"refs/bisect/",
12, 1);
add_entry_to_dir(dir, child_entry);
@ -261,13 +261,13 @@ static void clear_ref_dir(struct ref_dir *dir)
* dirname is the name of the directory with a trailing slash (e.g.,
* "refs/heads/") or "" for the top-level directory.
*/
static struct ref_entry *create_dir_entry(struct ref_cache *ref_cache,
static struct ref_entry *create_dir_entry(struct files_ref_store *ref_store,
const char *dirname, size_t len,
int incomplete)
{
struct ref_entry *direntry;
FLEX_ALLOC_MEM(direntry, name, dirname, len);
direntry->u.subdir.ref_cache = ref_cache;
direntry->u.subdir.ref_store = ref_store;
direntry->flag = REF_DIR | (incomplete ? REF_INCOMPLETE : 0);
return direntry;
}
@ -343,7 +343,7 @@ static struct ref_dir *search_for_subdir(struct ref_dir *dir,
* therefore, create an empty record for it but mark
* the record complete.
*/
entry = create_dir_entry(dir->ref_cache, subdirname, len, 0);
entry = create_dir_entry(dir->ref_store, subdirname, len, 0);
add_entry_to_dir(dir, entry);
} else {
entry = dir->entries[entry_index];
@ -887,9 +887,9 @@ struct packed_ref_cache {
/*
* Count of references to the data structure in this instance,
* including the pointer from ref_cache::packed if any. The
* data will not be freed as long as the reference count is
* nonzero.
* including the pointer from files_ref_store::packed if any.
* The data will not be freed as long as the reference count
* is nonzero.
*/
unsigned int referrers;
@ -910,17 +910,17 @@ struct packed_ref_cache {
* Future: need to be in "struct repository"
* when doing a full libification.
*/
static struct ref_cache {
struct ref_cache *next;
static struct files_ref_store {
struct files_ref_store *next;
struct ref_entry *loose;
struct packed_ref_cache *packed;
/*
* The submodule name, or "" for the main repo. We allocate
* length 1 rather than FLEX_ARRAY so that the main ref_cache
* is initialized correctly.
* The submodule name, or "" for the main repo. We allocate
* length 1 rather than FLEX_ARRAY so that the main
* files_ref_store is initialized correctly.
*/
char name[1];
} ref_cache, *submodule_ref_caches;
} ref_store, *submodule_ref_stores;
/* Lock used for the main packed-refs file: */
static struct lock_file packlock;
@ -949,7 +949,7 @@ static int release_packed_ref_cache(struct packed_ref_cache *packed_refs)
}
}
static void clear_packed_ref_cache(struct ref_cache *refs)
static void clear_packed_ref_cache(struct files_ref_store *refs)
{
if (refs->packed) {
struct packed_ref_cache *packed_refs = refs->packed;
@ -961,7 +961,7 @@ static void clear_packed_ref_cache(struct ref_cache *refs)
}
}
static void clear_loose_ref_cache(struct ref_cache *refs)
static void clear_loose_ref_cache(struct files_ref_store *refs)
{
if (refs->loose) {
free_ref_entry(refs->loose);
@ -973,32 +973,32 @@ static void clear_loose_ref_cache(struct ref_cache *refs)
* Create a new submodule ref cache and add it to the internal
* set of caches.
*/
static struct ref_cache *create_ref_cache(const char *submodule)
static struct files_ref_store *create_ref_store(const char *submodule)
{
struct ref_cache *refs;
struct files_ref_store *refs;
if (!submodule)
submodule = "";
FLEX_ALLOC_STR(refs, name, submodule);
refs->next = submodule_ref_caches;
submodule_ref_caches = refs;
refs->next = submodule_ref_stores;
submodule_ref_stores = refs;
return refs;
}
static struct ref_cache *lookup_ref_cache(const char *submodule)
static struct files_ref_store *lookup_ref_store(const char *submodule)
{
struct ref_cache *refs;
struct files_ref_store *refs;
if (!submodule || !*submodule)
return &ref_cache;
return &ref_store;
for (refs = submodule_ref_caches; refs; refs = refs->next)
for (refs = submodule_ref_stores; refs; refs = refs->next)
if (!strcmp(submodule, refs->name))
return refs;
return NULL;
}
/*
* Return a pointer to a ref_cache for the specified submodule. For
* Return a pointer to a files_ref_store 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.
@ -1006,16 +1006,16 @@ static struct ref_cache *lookup_ref_cache(const char *submodule)
* The returned structure will be allocated and initialized but not
* necessarily populated; it should not be freed.
*/
static struct ref_cache *get_ref_cache(const char *submodule)
static struct files_ref_store *get_ref_store(const char *submodule)
{
struct ref_cache *refs = lookup_ref_cache(submodule);
struct files_ref_store *refs = lookup_ref_store(submodule);
if (!refs) {
struct strbuf submodule_sb = STRBUF_INIT;
strbuf_addstr(&submodule_sb, submodule);
if (is_nonbare_repository_dir(&submodule_sb))
refs = create_ref_cache(submodule);
refs = create_ref_store(submodule);
strbuf_release(&submodule_sb);
}
@ -1151,10 +1151,10 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
}
/*
* Get the packed_ref_cache for the specified ref_cache, creating it
* if necessary.
* Get the packed_ref_cache for the specified files_ref_store,
* creating it if necessary.
*/
static struct packed_ref_cache *get_packed_ref_cache(struct ref_cache *refs)
static struct packed_ref_cache *get_packed_ref_cache(struct files_ref_store *refs)
{
char *packed_refs_file;
@ -1189,7 +1189,7 @@ static struct ref_dir *get_packed_ref_dir(struct packed_ref_cache *packed_ref_ca
return get_ref_dir(packed_ref_cache->root);
}
static struct ref_dir *get_packed_refs(struct ref_cache *refs)
static struct ref_dir *get_packed_refs(struct files_ref_store *refs)
{
return get_packed_ref_dir(get_packed_ref_cache(refs));
}
@ -1203,7 +1203,7 @@ static struct ref_dir *get_packed_refs(struct ref_cache *refs)
static void add_packed_ref(const char *refname, const unsigned char *sha1)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
get_packed_ref_cache(&ref_store);
if (!packed_ref_cache->lock)
die("internal error: packed refs not locked");
@ -1218,7 +1218,7 @@ static void add_packed_ref(const char *refname, const unsigned char *sha1)
*/
static void read_loose_refs(const char *dirname, struct ref_dir *dir)
{
struct ref_cache *refs = dir->ref_cache;
struct files_ref_store *refs = dir->ref_store;
DIR *d;
struct dirent *de;
int dirnamelen = strlen(dirname);
@ -1306,7 +1306,7 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir)
closedir(d);
}
static struct ref_dir *get_loose_refs(struct ref_cache *refs)
static struct ref_dir *get_loose_refs(struct files_ref_store *refs)
{
if (!refs->loose) {
/*
@ -1328,10 +1328,10 @@ static struct ref_dir *get_loose_refs(struct ref_cache *refs)
/*
* Called by resolve_gitlink_ref_recursive() after it failed to read
* from the loose refs in ref_cache refs. Find <refname> in the
* packed-refs file for the submodule.
* from the loose refs in refs. Find <refname> in the packed-refs file
* for the submodule.
*/
static int resolve_gitlink_packed_ref(struct ref_cache *refs,
static int resolve_gitlink_packed_ref(struct files_ref_store *refs,
const char *refname, unsigned char *sha1)
{
struct ref_entry *ref;
@ -1345,7 +1345,7 @@ static int resolve_gitlink_packed_ref(struct ref_cache *refs,
return 0;
}
static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
static int resolve_gitlink_ref_recursive(struct files_ref_store *refs,
const char *refname, unsigned char *sha1,
int recursion)
{
@ -1389,7 +1389,7 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sh
{
int len = strlen(path);
struct strbuf submodule = STRBUF_INIT;
struct ref_cache *refs;
struct files_ref_store *refs;
while (len && path[len-1] == '/')
len--;
@ -1397,7 +1397,7 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sh
return -1;
strbuf_add(&submodule, path, len);
refs = get_ref_cache(submodule.buf);
refs = get_ref_store(submodule.buf);
if (!refs) {
strbuf_release(&submodule);
return -1;
@ -1413,7 +1413,7 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sh
*/
static struct ref_entry *get_packed_ref(const char *refname)
{
return find_ref(get_packed_refs(&ref_cache), refname);
return find_ref(get_packed_refs(&ref_store), refname);
}
/*
@ -1745,7 +1745,7 @@ retry:
REMOVE_DIR_EMPTY_ONLY)) {
if (verify_refname_available_dir(
refname, extras, skip,
get_loose_refs(&ref_cache),
get_loose_refs(&ref_store),
err)) {
/*
* The error message set by
@ -1784,7 +1784,7 @@ retry:
*/
if (verify_refname_available_dir(
refname, extras, skip,
get_packed_refs(&ref_cache),
get_packed_refs(&ref_store),
err)) {
goto error_return;
}
@ -1942,7 +1942,7 @@ struct ref_iterator *files_ref_iterator_begin(
const char *submodule,
const char *prefix, unsigned int flags)
{
struct ref_cache *refs = get_ref_cache(submodule);
struct files_ref_store *refs = get_ref_store(submodule);
struct ref_dir *loose_dir, *packed_dir;
struct ref_iterator *loose_iter, *packed_iter;
struct files_ref_iterator *iter;
@ -2096,7 +2096,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
if (remove_empty_directories(&ref_file)) {
last_errno = errno;
if (!verify_refname_available_dir(refname, extras, skip,
get_loose_refs(&ref_cache), err))
get_loose_refs(&ref_store), err))
strbuf_addf(err, "there are still refs under '%s'",
refname);
goto error_return;
@ -2108,7 +2108,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
last_errno = errno;
if (last_errno != ENOTDIR ||
!verify_refname_available_dir(refname, extras, skip,
get_loose_refs(&ref_cache), err))
get_loose_refs(&ref_store), err))
strbuf_addf(err, "unable to resolve reference '%s': %s",
refname, strerror(last_errno));
@ -2123,7 +2123,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
*/
if (is_null_oid(&lock->old_oid) &&
verify_refname_available_dir(refname, extras, skip,
get_packed_refs(&ref_cache), err)) {
get_packed_refs(&ref_store), err)) {
last_errno = ENOTDIR;
goto error_return;
}
@ -2232,7 +2232,7 @@ static int lock_packed_refs(int flags)
* this will automatically invalidate the cache and re-read
* the packed-refs file.
*/
packed_ref_cache = get_packed_ref_cache(&ref_cache);
packed_ref_cache = get_packed_ref_cache(&ref_store);
packed_ref_cache->lock = &packlock;
/* Increment the reference count to prevent it from being freed: */
acquire_packed_ref_cache(packed_ref_cache);
@ -2248,7 +2248,7 @@ static int lock_packed_refs(int flags)
static int commit_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
get_packed_ref_cache(&ref_store);
int error = 0;
int save_errno = 0;
FILE *out;
@ -2282,14 +2282,14 @@ static int commit_packed_refs(void)
static void rollback_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
get_packed_ref_cache(&ref_store);
if (!packed_ref_cache->lock)
die("internal error: packed-refs not locked");
rollback_lock_file(packed_ref_cache->lock);
packed_ref_cache->lock = NULL;
release_packed_ref_cache(packed_ref_cache);
clear_packed_ref_cache(&ref_cache);
clear_packed_ref_cache(&ref_store);
}
struct ref_to_prune {
@ -2428,9 +2428,9 @@ int pack_refs(unsigned int flags)
cbdata.flags = flags;
lock_packed_refs(LOCK_DIE_ON_ERROR);
cbdata.packed_refs = get_packed_refs(&ref_cache);
cbdata.packed_refs = get_packed_refs(&ref_store);
do_for_each_entry_in_dir(get_loose_refs(&ref_cache), 0,
do_for_each_entry_in_dir(get_loose_refs(&ref_store), 0,
pack_if_possible_fn, &cbdata);
if (commit_packed_refs())
@ -2471,7 +2471,7 @@ static int repack_without_refs(struct string_list *refnames, struct strbuf *err)
unable_to_lock_message(git_path("packed-refs"), errno, err);
return -1;
}
packed = get_packed_refs(&ref_cache);
packed = get_packed_refs(&ref_store);
/* Remove refnames from the cache */
for_each_string_list_item(refname, refnames)
@ -2616,8 +2616,8 @@ int verify_refname_available(const char *newname,
const struct string_list *skip,
struct strbuf *err)
{
struct ref_dir *packed_refs = get_packed_refs(&ref_cache);
struct ref_dir *loose_refs = get_loose_refs(&ref_cache);
struct ref_dir *packed_refs = get_packed_refs(&ref_store);
struct ref_dir *loose_refs = get_loose_refs(&ref_store);
if (verify_refname_available_dir(newname, extras, skip,
packed_refs, err) ||
@ -2968,7 +2968,7 @@ static int commit_ref_update(struct ref_lock *lock,
const unsigned char *sha1, const char *logmsg,
struct strbuf *err)
{
clear_loose_ref_cache(&ref_cache);
clear_loose_ref_cache(&ref_store);
if (log_ref_write(lock->ref_name, lock->old_oid.hash, sha1, logmsg, 0, err)) {
char *old_msg = strbuf_detach(err, NULL);
strbuf_addf(err, "cannot update the ref '%s': %s",
@ -3790,7 +3790,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
}
}
if (update->flags & REF_NEEDS_COMMIT) {
clear_loose_ref_cache(&ref_cache);
clear_loose_ref_cache(&ref_store);
if (commit_ref(lock)) {
strbuf_addf(err, "couldn't set '%s'", lock->ref_name);
unlock_ref(lock);
@ -3823,7 +3823,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
}
for_each_string_list_item(ref_to_delete, &refs_to_delete)
unlink_or_warn(git_path("logs/%s", ref_to_delete->string));
clear_loose_ref_cache(&ref_cache);
clear_loose_ref_cache(&ref_store);
cleanup:
transaction->state = REF_TRANSACTION_CLOSED;