The match_explicit_lhs function has all of the logic
necessary to verify the refspecs without actually doing any
work. This patch lets callers pass a NULL "match" pointer to
indicate they want a "verify only" operation.
For the most part, we just need to avoid writing to the NULL
pointer. However, we also have to refactor the
try_explicit_object_name sub-function; it indicates success by
allocating and returning a new ref. Instead, we give it an
"out" parameter for the match and return a numeric status.
Signed-off-by: Jeff King <p...@peff.net>
---
remote.c | 38 ++++++++++++++++++++++++--------------
1 file changed, 24 insertions(+), 14 deletions(-)
diff --git a/remote.c b/remote.c
index 6aa9dd2..b6586c0 100644
--- a/remote.c
+++ b/remote.c
@@ -1031,11 +1031,13 @@ int count_refspec_match(const char *pattern,
}
}
if (!matched) {
- *matched_ref = matched_weak;
+ if (matched_ref)
+ *matched_ref = matched_weak;
return weak_match;
}
else {
- *matched_ref = matched;
+ if (matched_ref)
+ *matched_ref = matched;
return match;
}
}
@@ -1055,18 +1057,25 @@ static struct ref *alloc_delete_ref(void)
return ref;
}
-static struct ref *try_explicit_object_name(const char *name)
+static int try_explicit_object_name(const char *name,
+ struct ref **match)
{
unsigned char sha1[20];
- struct ref *ref;
- if (!*name)
- return alloc_delete_ref();
+ if (!*name) {
+ if (match)
+ *match = alloc_delete_ref();
+ return 0;
+ }
+
if (get_sha1(name, sha1))
- return NULL;
- ref = alloc_ref(name);
- hashcpy(ref->new_sha1, sha1);
- return ref;
+ return -1;
+
+ if (match) {
+ *match = alloc_ref(name);
+ hashcpy((*match)->new_sha1, sha1);
+ }
+ return 0;
}
static struct ref *make_linked_ref(const char *name, struct ref ***tail)
@@ -1103,17 +1112,18 @@ static int match_explicit_lhs(struct ref *src,
{
switch (count_refspec_match(rs->src, src, match)) {
case 1:
- *allocated_match = 0;
+ if (allocated_match)
+ *allocated_match = 0;
return 0;
case 0:
/* The source could be in the get_sha1() format
* not a reference name. :refs/other is a
* way to delete 'other' ref at the remote end.
*/
- *match = try_explicit_object_name(rs->src);
- if (!*match)
+ if (try_explicit_object_name(rs->src, match) < 0)
return error("src refspec %s does not match any.",
rs->src);
- *allocated_match = 1;
+ if (allocated_match)
+ *allocated_match = 1;
return 0;
default:
return error("src refspec %s matches more than one.", rs->src);
--
1.8.5.2.500.g8060133
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