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refs: introduce refs_for_each_include_root_refs()

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Introduce a new ref iteration flag `DO_FOR_EACH_INCLUDE_ROOT_REFS`,
which will be used to iterate over regular refs plus pseudorefs and
HEAD.

Refs which fall outside the `refs/` and aren't either pseudorefs or HEAD
are more of a grey area. This is because we don't block the users from
creating such refs but they are not officially supported.

Introduce `refs_for_each_include_root_refs()` which calls
`do_for_each_ref()` with this newly introduced flag.

In `refs/files-backend.c`, introduce a new function
`add_pseudoref_and_head_entries()` to add pseudorefs and HEAD to the
`ref_dir`. We then finally call `add_pseudoref_and_head_entries()`
whenever the `DO_FOR_EACH_INCLUDE_ROOT_REFS` flag is set. Any new ref
backend will also have to implement similar changes on its end.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karthik Nayak
2024-02-23 11:01:10 +01:00
committed by Junio C Hamano
parent f768296cf1
commit d0f00c1ac1
4 changed files with 79 additions and 5 deletions
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6
refs.h
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@ -398,6 +398,12 @@ int for_each_namespaced_ref(const char **exclude_patterns,
int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data);
int for_each_rawref(each_ref_fn fn, void *cb_data);
/*
* Iterates over all refs including root refs, i.e. pseudorefs and HEAD.
*/
int refs_for_each_include_root_refs(struct ref_store *refs, each_ref_fn fn,
void *cb_data);
/*
* Normalizes partial refs to their fully qualified form.
* Will prepend <prefix> to the <pattern> if it doesn't start with 'refs/'.