From: Jim Hill <gjthill@gmail.com>
Date: Sun, 31 May 2015 18:15:21 GMT
Subject: [PATCH 0/2] don't add duplicate paths to info/alternates
Message-ID: <1433096123-14420-1-git-send-email-gjthill@gmail.com>

These patches address
http://thread.gmane.org/gmane.comp.version-control.git/269050/focus=269415
linked from the git blame page, avoiding adding duplicates to info/alternates
and removing hold_lock_file_for_append which is too heavyweight for logging and
too limited for anything else.

There's an argument to be made that since a-t-a-f is only used by clone, it
shouldn't even bother taking a lock -- but then it should be moved to
builtin/clone.c and reduced to a single write of the pre-deduped list, followed
by a single read_info_alternates call. One thing at a time.  Taking out the
locking in the incremental version here doesn't really simplify the code much
anyway.