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refs: pass NULL to resolve_ref_unsafe() if hash is not needed

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This allows us to get rid of some write-only variables, among them seven
SHA1 buffers.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe
2017-09-23 11:45:04 +02:00
committed by Junio C Hamano
parent e691b027b6
commit 744c040b19
14 changed files with 19 additions and 38 deletions
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3
builtin/log.c
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@ -1660,10 +1660,9 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
check_head = 1;
if (check_head) {
struct object_id oid;
const char *ref, *v;
ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
oid.hash, NULL);
NULL, NULL);
if (ref && skip_prefix(ref, "refs/heads/", &v))
branch_name = xstrdup(v);
else