[PATCH v4 1/3] refs: keep track of unresolved reference value in iterators
- From
John Cai via GitGitGadget <gitgitgadget@gmail.com>
- Date
- Aug 9, 2024, 15:37 UTC
- Message-ID
- <c4f5f5b7dd8dad4f17201611faee14dd1b882bff.1723217871.git.gitgitgadget@gmail.com>
- In-Reply-To
- <pull.1712.v4.git.git.1723217871.gitgitgadget@gmail.com>
From: John Cai <johncai86@gmail.com>
Since ref iterators do not hold onto the direct value of a reference without resolving it, the only way to get ahold of a direct value of a symbolic ref is to make a separate call to refs_read_symbolic_ref.
To make accessing the direct value of a symbolic ref more efficient, let's save the direct value of the ref in the iterators for both the files backend and the reftable backend.
Signed-off-by: John Cai <johncai86@gmail.com> --- refs/files-backend.c | 15 ++++++++++++--- refs/iterator.c | 2 ++ refs/ref-cache.c | 5 +++++ refs/ref-cache.h | 2 ++ refs/refs-internal.h | 1 + refs/reftable-backend.c | 10 ++++++++-- 6 files changed, 30 insertions(+), 5 deletions(-)
diff --git a/refs/files-backend.c b/refs/files-backend.c index aa52d9be7c7..210adf644fa 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -245,9 +245,12 @@ static void loose_fill_ref_dir_regular_file(struct files_ref_store *refs, { struct object_id oid; int flag; + const char *referent = refs_resolve_ref_unsafe(&refs->base, + refname, + RESOLVE_REF_READING, + &oid, &flag); - if (!refs_resolve_ref_unsafe(&refs->base, refname, RESOLVE_REF_READING, - &oid, &flag)) { + if (!referent) { oidclr(&oid, the_repository->hash_algo); flag |= REF_ISBROKEN; } else if (is_null_oid(&oid)) { @@ -268,7 +271,11 @@ static void loose_fill_ref_dir_regular_file(struct files_ref_store *refs, oidclr(&oid, the_repository->hash_algo); flag |= REF_BAD_NAME | REF_ISBROKEN; } - add_entry_to_dir(dir, create_ref_entry(refname, &oid, flag)); + + if (!(flag & REF_ISSYMREF)) + referent = NULL; + + add_entry_to_dir(dir, create_ref_entry(refname, referent, &oid, flag)); } /* @@ -886,6 +893,8 @@ static int files_ref_iterator_advance(struct ref_iterator *ref_iterator) iter->base.refname = iter->iter0->refname; iter->base.oid = iter->iter0->oid; iter->base.flags = iter->iter0->flags; + iter->base.referent = iter->iter0->referent; + return ITER_OK; } diff --git a/refs/iterator.c b/refs/iterator.c index d355ebf0d59..75fbe5d72ab 100644 --- a/refs/iterator.c +++ b/refs/iterator.c @@ -29,6 +29,7 @@ void base_ref_iterator_init(struct ref_iterator *iter, { iter->vtable = vtable; iter->refname = NULL; + iter->referent = NULL; iter->oid = NULL; iter->flags = 0; } @@ -199,6 +200,7 @@ static int merge_ref_iterator_advance(struct ref_iterator *ref_iterator) } if (selection & ITER_YIELD_CURRENT) { + iter->base.referent = (*iter->current)->referent; iter->base.refname = (*iter->current)->refname; iter->base.oid = (*iter->current)->oid; iter->base.flags = (*iter->current)->flags; diff --git a/refs/ref-cache.c b/refs/ref-cache.c index 4ce519bbc85..35bae7e05de 100644 --- a/refs/ref-cache.c +++ b/refs/ref-cache.c @@ -34,6 +34,7 @@ struct ref_dir *get_ref_dir(struct ref_entry *entry) } struct ref_entry *create_ref_entry(const char *refname, + const char *referent, const struct object_id *oid, int flag) { struct ref_entry *ref; @@ -41,6 +42,8 @@ struct ref_entry *create_ref_entry(const char *refname, FLEX_ALLOC_STR(ref, name, refname); oidcpy(&ref->u.value.oid, oid); ref->flag = flag; + ref->u.value.referent = xstrdup_or_null(referent); + return ref; } @@ -66,6 +69,7 @@ static void free_ref_entry(struct ref_entry *entry) */ clear_ref_dir(&entry->u.subdir); } + free(entry->u.value.referent); free(entry); } @@ -431,6 +435,7 @@ static int cache_ref_iterator_advance(struct ref_iterator *ref_iterator) level->index = -1; } else { iter->base.refname = entry->name; + iter->base.referent = entry->u.value.referent; iter->base.oid = &entry->u.value.oid; iter->base.flags = entry->flag; return ITER_OK; diff --git a/refs/ref-cache.h b/refs/ref-cache.h index 31ebe24f6cf..5f04e518c37 100644 --- a/refs/ref-cache.h +++ b/refs/ref-cache.h @@ -42,6 +42,7 @@ struct ref_value { * referred to by the last reference in the symlink chain. */ struct object_id oid; + char *referent; }; /* @@ -173,6 +174,7 @@ struct ref_entry *create_dir_entry(struct ref_cache *cache, const char *dirname, size_t len); struct ref_entry *create_ref_entry(const char *refname, + const char *referent, const struct object_id *oid, int flag); /* diff --git a/refs/refs-internal.h b/refs/refs-internal.h index fa975d69aaa..117ec233848 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -299,6 +299,7 @@ enum do_for_each_ref_flags { struct ref_iterator { struct ref_iterator_vtable *vtable; const char *refname; + const char *referent; const struct object_id *oid; unsigned int flags; }; diff --git a/refs/reftable-backend.c b/refs/reftable-backend.c index fbe74c239d3..50a072b97b0 100644 --- a/refs/reftable-backend.c +++ b/refs/reftable-backend.c @@ -455,6 +455,7 @@ static int reftable_ref_iterator_advance(struct ref_iterator *ref_iterator) struct reftable_ref_iterator *iter = (struct reftable_ref_iterator *)ref_iterator; struct reftable_ref_store *refs = iter->refs; + const char *referent = NULL; while (!iter->err) { int flags = 0; @@ -494,8 +495,12 @@ static int reftable_ref_iterator_advance(struct ref_iterator *ref_iterator) the_repository->hash_algo); break; case REFTABLE_REF_SYMREF: - if (!refs_resolve_ref_unsafe(&iter->refs->base, iter->ref.refname, - RESOLVE_REF_READING, &iter->oid, &flags)) + referent = refs_resolve_ref_unsafe(&iter->refs->base, + iter->ref.refname, + RESOLVE_REF_READING, + &iter->oid, + &flags); + if (!referent) oidclr(&iter->oid, the_repository->hash_algo); break; default: @@ -523,6 +528,7 @@ static int reftable_ref_iterator_advance(struct ref_iterator *ref_iterator) continue; iter->base.refname = iter->ref.refname; + iter->base.referent = referent; iter->base.oid = &iter->oid; iter->base.flags = flags;
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