Merge branch 'rs/ref-transaction'

The API to update refs have been restructured to allow introducing
a true transactional updates later.  We would even allow storing
refs in backends other than the traditional filesystem-based one.

* rs/ref-transaction: (25 commits)
  ref_transaction_commit: bail out on failure to remove a ref
  lockfile: remove unable_to_lock_error
  refs.c: do not permit err == NULL
  remote rm/prune: print a message when writing packed-refs fails
  for-each-ref: skip and warn about broken ref names
  refs.c: allow listing and deleting badly named refs
  test: put tests for handling of bad ref names in one place
  packed-ref cache: forbid dot-components in refnames
  branch -d: simplify by using RESOLVE_REF_READING
  branch -d: avoid repeated symref resolution
  reflog test: test interaction with detached HEAD
  refs.c: change resolve_ref_unsafe reading argument to be a flags field
  refs.c: make write_ref_sha1 static
  fetch.c: change s_update_ref to use a ref transaction
  refs.c: ref_transaction_commit: distinguish name conflicts from other errors
  refs.c: pass a list of names to skip to is_refname_available
  refs.c: call lock_ref_sha1_basic directly from commit
  refs.c: refuse to lock badly named refs in lock_ref_sha1_basic
  rename_ref: don't ask read_ref_full where the ref came from
  refs.c: pass the ref log message to _create/delete/update instead of _commit
  ...

1 files changed, 9 insertions, 2 deletions

diff --git a/builtin/for-each-ref.c b/builtin/for-each-ref.c
index 7ee86b3ae1f..603a90e29b8 100644
--- a/builtin/for-each-ref.c
+++ b/builtin/for-each-ref.c
@@ -635,7 +635,8 @@ static void populate_value(struct refinfo *ref)
 
 	if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
 		unsigned char unused1[20];
-		ref->symref = resolve_refdup(ref->refname, unused1, 1, NULL);
+		ref->symref = resolve_refdup(ref->refname, RESOLVE_REF_READING,
+					     unused1, NULL);
 		if (!ref->symref)
 			ref->symref = "";
 	}
@@ -694,7 +695,8 @@ static void populate_value(struct refinfo *ref)
 			const char *head;
 			unsigned char sha1[20];
 
-			head = resolve_ref_unsafe("HEAD", sha1, 1, NULL);
+			head = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
+						  sha1, NULL);
 			if (!strcmp(ref->refname, head))
 				v->s = "*";
 			else
@@ -838,6 +840,11 @@ static int grab_single_ref(const char *refname, const unsigned char *sha1, int f
 	struct refinfo *ref;
 	int cnt;
 
+	if (flag & REF_BAD_NAME) {
+		  warning("ignoring ref with broken name %s", refname);
+		  return 0;
+	}
+
 	if (*cb->grab_pattern) {
 		const char **pattern;
 		int namelen = strlen(refname);