refs: improve documentation for ref iterator

Document some of the flag options in refs_ref_iterator_begin, and explain how
ref_iterator_advance_fn should handle them.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Han-Wen Nienhuys 2020-05-20 17:36:09 +00:00 committed by Junio C Hamano
parent cdb73ca56f
commit 84ee4ca10d

View File

@ -347,9 +347,13 @@ int is_empty_ref_iterator(struct ref_iterator *ref_iterator);
/*
* Return an iterator that goes over each reference in `refs` for
* which the refname begins with prefix. If trim is non-zero, then
* trim that many characters off the beginning of each refname. flags
* can be DO_FOR_EACH_INCLUDE_BROKEN to include broken references in
* the iteration. The output is ordered by refname.
* trim that many characters off the beginning of each refname.
* The output is ordered by refname. The following flags are supported:
*
* DO_FOR_EACH_INCLUDE_BROKEN: include broken references in
* the iteration.
*
* DO_FOR_EACH_PER_WORKTREE_ONLY: only produce REF_TYPE_PER_WORKTREE refs.
*/
struct ref_iterator *refs_ref_iterator_begin(
struct ref_store *refs,
@ -438,6 +442,14 @@ void base_ref_iterator_free(struct ref_iterator *iter);
/* Virtual function declarations for ref_iterators: */
/*
* backend-specific implementation of ref_iterator_advance. For symrefs, the
* function should set REF_ISSYMREF, and it should also dereference the symref
* to provide the OID referent. If DO_FOR_EACH_INCLUDE_BROKEN is set, symrefs
* with non-existent referents and refs pointing to non-existent object names
* should also be returned. If DO_FOR_EACH_PER_WORKTREE_ONLY, only
* REF_TYPE_PER_WORKTREE refs should be returned.
*/
typedef int ref_iterator_advance_fn(struct ref_iterator *ref_iterator);
typedef int ref_iterator_peel_fn(struct ref_iterator *ref_iterator,