delete_ref() uses a different convention for its old_sha1 parameter
than, say, ref_transaction_delete(): NULL_SHA1 means not to check the
old value. Make this fact a little bit clearer in the code by handling
it in explicit, commented code rather than burying it in a conditional
expression.
Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
---
refs.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/refs.c b/refs.c
index b575bb8..f9d87b6 100644
--- a/refs.c
+++ b/refs.c
@@ -2795,10 +2795,13 @@ int delete_ref(const char *refname, const unsigned char *old_sha1,
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
+ /* Treat NULL_SHA1 as "don't care" */
+ if (old_sha1 && is_null_sha1(old_sha1))
+ old_sha1 = NULL;
+
transaction = ref_transaction_begin(&err);
if (!transaction ||
- ref_transaction_delete(transaction, refname,
- (old_sha1 && !is_null_sha1(old_sha1)) ? old_sha1 : NULL,
+ ref_transaction_delete(transaction, refname, old_sha1,
flags, NULL, &err) ||
ref_transaction_commit(transaction, &err)) {
error("%s", err.buf);
--
2.1.4
--
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