refs: add option core.logAllRefUpdates = always

When core.logallrefupdates is true, we only create a new reflog for refs
that are under certain well-known hierarchies. The reason is that we
know that some hierarchies (like refs/tags) are not meant to change, and
that unknown hierarchies might not want reflogs at all (e.g., a
hypothetical refs/foo might be meant to change often and drop old
history immediately).

However, sometimes it is useful to override this decision and simply log
for all refs, because the safety and audit trail is more important than
the performance implications of keeping the log around.

This patch introduces a new "always" mode for the core.logallrefupdates
option which will log updates to everything under refs/, regardless
where in the hierarchy it is (we still will not log things like
ORIG_HEAD and FETCH_HEAD, which are known to be transient).

Based-on-patch-by: Jeff King <peff@peff.net>
Signed-off-by: Cornelius Weig <cornelius.weig@tngtech.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index 5055a96..2ac25a9 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -150,7 +150,8 @@ This option is only applicable when listing tags without annotation lines.
 	'strip' removes both whitespace and commentary.
 
 --create-reflog::
-	Create a reflog for the tag.
+	Create a reflog for the tag. To globally enable reflogs for tags, see
+	`core.logAllRefUpdates` in linkgit:git-config[1].
 
 <tagname>::
 	The name of the tag to create, delete, or describe.