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refs.c: change resolve_ref_unsafe reading argument to be a flags field

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resolve_ref_unsafe takes a boolean argument for reading (a nonexistent ref
resolves successfully for writing but not for reading).  Change this to be
a flags field instead, and pass the new constant RESOLVE_REF_READING when
we want this behaviour.

While at it, swap two of the arguments in the function to put output
arguments at the end.  As a nice side effect, this ensures that we can
catch callers that were unaware of the new API so they can be audited.

Give the wrapper functions resolve_refdup and read_ref_full the same
treatment for consistency.

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ronnie Sahlberg
2014-07-15 12:59:36 -07:00
committed by Junio C Hamano
parent aae383db8c
commit 7695d118e5
28 changed files with 124 additions and 92 deletions
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9
builtin/branch.c
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@ -131,7 +131,8 @@ static int branch_merged(int kind, const char *name,
branch->merge[0] &&
branch->merge[0]->dst &&
(reference_name = reference_name_to_free =
resolve_refdup(branch->merge[0]->dst, sha1, 1, NULL)) != NULL)
resolve_refdup(branch->merge[0]->dst, RESOLVE_REF_READING,
sha1, NULL)) != NULL)
reference_rev = lookup_commit_reference(sha1);
}
if (!reference_rev)
@ -235,7 +236,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
free(name);
name = mkpathdup(fmt, bname.buf);
target = resolve_ref_unsafe(name, sha1, 0, &flags);
target = resolve_ref_unsafe(name, 0, sha1, &flags);
if (!target ||
(!(flags & REF_ISSYMREF) && is_null_sha1(sha1))) {
error(remote_branch
@ -299,7 +300,7 @@ static char *resolve_symref(const char *src, const char *prefix)
int flag;
const char *dst;
dst = resolve_ref_unsafe(src, sha1, 0, &flag);
dst = resolve_ref_unsafe(src, 0, sha1, &flag);
if (!(dst && (flag & REF_ISSYMREF)))
return NULL;
if (prefix)
@ -869,7 +870,7 @@ int cmd_branch(int argc, const char **argv, const char *prefix)
track = git_branch_track;
head = resolve_refdup("HEAD", head_sha1, 0, NULL);
head = resolve_refdup("HEAD", 0, head_sha1, NULL);
if (!head)
die(_("Failed to resolve HEAD as a valid ref."));
if (!strcmp(head, "HEAD"))