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refs.h: clarify docstring for the ref_transaction_update()-related fns

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In particular, make it clear that they make copies of the sha1
arguments.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Michael Haggerty 2017-05-22 16:17:32 +02:00 committed by Junio C Hamano
parent 23739aa2b3
commit fd2ce9c01c
1 changed files with 13 additions and 0 deletions
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refs.h
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@ -427,6 +427,19 @@ struct ref_transaction *ref_transaction_begin(struct strbuf *err);
*
* refname -- the name of the reference to be affected.
*
* new_sha1 -- the SHA-1 that should be set to be the new value of
* the reference. Some functions allow this parameter to be
* NULL, meaning that the reference is not changed, or
* null_sha1, meaning that the reference should be deleted. A
* copy of this value is made in the transaction.
*
* old_sha1 -- the SHA-1 value that the reference must have before
* the update. Some functions allow this parameter to be NULL,
* meaning that the old value of the reference is not checked,
* or null_sha1, meaning that the reference must not exist
* before the update. A copy of this value is made in the
* transaction.
*
* flags -- flags affecting the update, passed to
* update_ref_lock(). Can be REF_NODEREF, which means that
* symbolic references should not be followed.