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files-backend: avoid ref api targeting main ref store

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A small step towards making files-backend work as a non-main ref store
using the newly added store-aware API.

For the record, `join` and `nm` on refs.o and files-backend.o tell me
that files-backend no longer uses functions that default to
get_main_ref_store().

I'm not yet comfortable at the idea of removing
files_assert_main_repository() (or converting REF_STORE_MAIN to
REF_STORE_WRITE). More staring and testing is required before that can
happen. Well, except peel_ref(). I'm pretty sure that function is safe.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2017-03-26 09:42:36 +07:00 committed by Junio C Hamano
parent c0fe4e8ba3
commit 2f40e95472
1 changed files with 49 additions and 35 deletions
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84
refs/files-backend.c
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@ -1829,8 +1829,6 @@ static int files_peel_ref(struct ref_store *ref_store,
int flag;
unsigned char base[20];
files_assert_main_repository(refs, "peel_ref");
if (current_ref_iter && current_ref_iter->refname == refname) {
struct object_id peeled;
@ -1840,7 +1838,8 @@ static int files_peel_ref(struct ref_store *ref_store,
return 0;
}
if (read_ref_full(refname, RESOLVE_REF_READING, base, &flag))
if (refs_read_ref_full(ref_store, refname,
RESOLVE_REF_READING, base, &flag))
return -1;
/*
@ -2008,15 +2007,15 @@ static struct ref_iterator *files_ref_iterator_begin(
* on success. On error, write an error message to err, set errno, and
* return a negative value.
*/
static int verify_lock(struct ref_lock *lock,
static int verify_lock(struct ref_store *ref_store, struct ref_lock *lock,
const unsigned char *old_sha1, int mustexist,
struct strbuf *err)
{
assert(err);
if (read_ref_full(lock->ref_name,
mustexist ? RESOLVE_REF_READING : 0,
lock->old_oid.hash, NULL)) {
if (refs_read_ref_full(ref_store, lock->ref_name,
mustexist ? RESOLVE_REF_READING : 0,
lock->old_oid.hash, NULL)) {
if (old_sha1) {
int save_errno = errno;
strbuf_addf(err, "can't verify ref '%s'", lock->ref_name);
@ -2085,8 +2084,9 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs,
resolve_flags |= RESOLVE_REF_ALLOW_BAD_NAME;
files_ref_path(refs, &ref_file, refname);
resolved = !!resolve_ref_unsafe(refname, resolve_flags,
lock->old_oid.hash, type);
resolved = !!refs_resolve_ref_unsafe(&refs->base,
refname, resolve_flags,
lock->old_oid.hash, type);
if (!resolved && errno == EISDIR) {
/*
* we are trying to lock foo but we used to
@ -2103,8 +2103,9 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs,
refname);
goto error_return;
}
resolved = !!resolve_ref_unsafe(refname, resolve_flags,
lock->old_oid.hash, type);
resolved = !!refs_resolve_ref_unsafe(&refs->base,
refname, resolve_flags,
lock->old_oid.hash, type);
}
if (!resolved) {
last_errno = errno;
@ -2142,7 +2143,7 @@ static struct ref_lock *lock_ref_sha1_basic(struct files_ref_store *refs,
goto error_return;
}
if (verify_lock(lock, old_sha1, mustexist, err)) {
if (verify_lock(&refs->base, lock, old_sha1, mustexist, err)) {
last_errno = errno;
goto error_return;
}
@ -2397,7 +2398,7 @@ static void try_remove_empty_parents(struct files_ref_store *refs,
}
/* make sure nobody touched the ref, and unlink */
static void prune_ref(struct ref_to_prune *r)
static void prune_ref(struct files_ref_store *refs, struct ref_to_prune *r)
{
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
@ -2405,7 +2406,7 @@ static void prune_ref(struct ref_to_prune *r)
if (check_refname_format(r->name, 0))
return;
transaction = ref_transaction_begin(&err);
transaction = ref_store_transaction_begin(&refs->base, &err);
if (!transaction ||
ref_transaction_delete(transaction, r->name, r->sha1,
REF_ISPRUNING | REF_NODEREF, NULL, &err) ||
@ -2419,10 +2420,10 @@ static void prune_ref(struct ref_to_prune *r)
strbuf_release(&err);
}
static void prune_refs(struct ref_to_prune *r)
static void prune_refs(struct files_ref_store *refs, struct ref_to_prune *r)
{
while (r) {
prune_ref(r);
prune_ref(refs, r);
r = r->next;
}
}
@ -2446,7 +2447,7 @@ static int files_pack_refs(struct ref_store *ref_store, unsigned int flags)
if (commit_packed_refs(refs))
die_errno("unable to overwrite old ref-pack file");
prune_refs(cbdata.ref_to_prune);
prune_refs(refs, cbdata.ref_to_prune);
return 0;
}
@ -2538,7 +2539,7 @@ static int files_delete_refs(struct ref_store *ref_store,
for (i = 0; i < refnames->nr; i++) {
const char *refname = refnames->items[i].string;
if (delete_ref(NULL, refname, NULL, flags))
if (refs_delete_ref(&refs->base, NULL, refname, NULL, flags))
result |= error(_("could not remove reference %s"), refname);
}
@ -2660,7 +2661,8 @@ static int files_rename_ref(struct ref_store *ref_store,
goto out;
}
if (!resolve_ref_unsafe(oldrefname, RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
if (!refs_resolve_ref_unsafe(&refs->base, oldrefname,
RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
orig_sha1, &flag)) {
ret = error("refname %s not found", oldrefname);
goto out;
@ -2682,7 +2684,8 @@ static int files_rename_ref(struct ref_store *ref_store,
goto out;
}
if (delete_ref(logmsg, oldrefname, orig_sha1, REF_NODEREF)) {
if (refs_delete_ref(&refs->base, logmsg, oldrefname,
orig_sha1, REF_NODEREF)) {
error("unable to delete old %s", oldrefname);
goto rollback;
}
@ -2694,9 +2697,11 @@ static int files_rename_ref(struct ref_store *ref_store,
* the safety anyway; we want to delete the reference whatever
* its current value.
*/
if (!read_ref_full(newrefname, RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
sha1, NULL) &&
delete_ref(NULL, newrefname, NULL, REF_NODEREF)) {
if (!refs_read_ref_full(&refs->base, newrefname,
RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
sha1, NULL) &&
refs_delete_ref(&refs->base, NULL, newrefname,
NULL, REF_NODEREF)) {
if (errno == EISDIR) {
struct strbuf path = STRBUF_INIT;
int result;
@ -3052,8 +3057,9 @@ static int commit_ref_update(struct files_ref_store *refs,
int head_flag;
const char *head_ref;
head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
head_sha1, &head_flag);
head_ref = refs_resolve_ref_unsafe(&refs->base, "HEAD",
RESOLVE_REF_READING,
head_sha1, &head_flag);
if (head_ref && (head_flag & REF_ISSYMREF) &&
!strcmp(head_ref, lock->ref_name)) {
struct strbuf log_err = STRBUF_INIT;
@ -3097,7 +3103,9 @@ static void update_symref_reflog(struct files_ref_store *refs,
{
struct strbuf err = STRBUF_INIT;
unsigned char new_sha1[20];
if (logmsg && !read_ref(target, new_sha1) &&
if (logmsg &&
!refs_read_ref_full(&refs->base, target,
RESOLVE_REF_READING, new_sha1, NULL) &&
files_log_ref_write(refs, refname, lock->old_oid.hash,
new_sha1, logmsg, 0, &err)) {
error("%s", err.buf);
@ -3402,6 +3410,7 @@ static int files_for_each_reflog_ent(struct ref_store *ref_store,
struct files_reflog_iterator {
struct ref_iterator base;
struct ref_store *ref_store;
struct dir_iterator *dir_iterator;
struct object_id oid;
};
@ -3423,8 +3432,9 @@ static int files_reflog_iterator_advance(struct ref_iterator *ref_iterator)
if (ends_with(diter->basename, ".lock"))
continue;
if (read_ref_full(diter->relative_path, 0,
iter->oid.hash, &flags)) {
if (refs_read_ref_full(iter->ref_store,
diter->relative_path, 0,
iter->oid.hash, &flags)) {
error("bad ref for %s", diter->path.buf);
continue;
}
@ -3478,6 +3488,7 @@ static struct ref_iterator *files_reflog_iterator_begin(struct ref_store *ref_st
base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable);
files_reflog_path(refs, &sb, NULL);
iter->dir_iterator = dir_iterator_begin(sb.buf);
iter->ref_store = ref_store;
strbuf_release(&sb);
return ref_iterator;
}
@ -3717,8 +3728,9 @@ static int lock_ref_for_update(struct files_ref_store *refs,
* the transaction, so we have to read it here
* to record and possibly check old_sha1:
*/
if (read_ref_full(referent.buf, 0,
lock->old_oid.hash, NULL)) {
if (refs_read_ref_full(&refs->base,
referent.buf, 0,
lock->old_oid.hash, NULL)) {
if (update->flags & REF_HAVE_OLD) {
strbuf_addf(err, "cannot lock ref '%s': "
"error reading reference",
@ -3872,8 +3884,9 @@ static int files_transaction_commit(struct ref_store *ref_store,
* head_ref within the transaction, then split_head_update()
* arranges for the reflog of HEAD to be updated, too.
*/
head_ref = resolve_refdup("HEAD", RESOLVE_REF_NO_RECURSE,
head_oid.hash, &head_type);
head_ref = refs_resolve_refdup(ref_store, "HEAD",
RESOLVE_REF_NO_RECURSE,
head_oid.hash, &head_type);
if (head_ref && !(head_type & REF_ISSYMREF)) {
free(head_ref);
@ -4046,7 +4059,8 @@ static int files_initial_transaction_commit(struct ref_store *ref_store,
* so here we really only check that none of the references
* that we are creating already exists.
*/
if (for_each_rawref(ref_present, &affected_refnames))
if (refs_for_each_rawref(&refs->base, ref_present,
&affected_refnames))
die("BUG: initial ref transaction called with existing refs");
for (i = 0; i < transaction->nr; i++) {
@ -4165,7 +4179,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
strbuf_release(&err);
return -1;
}
if (!reflog_exists(refname)) {
if (!refs_reflog_exists(ref_store, refname)) {
unlock_ref(lock);
return 0;
}
@ -4196,7 +4210,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
}
(*prepare_fn)(refname, sha1, cb.policy_cb);
for_each_reflog_ent(refname, expire_reflog_ent, &cb);
refs_for_each_reflog_ent(ref_store, refname, expire_reflog_ent, &cb);
(*cleanup_fn)(cb.policy_cb);
if (!(flags & EXPIRE_REFLOGS_DRY_RUN)) {