Merge branch 'nd/parseopt-completion'

Teach parse-options API an option to help the completion script,
and make use of the mechanism in command line completion.

* nd/parseopt-completion: (45 commits)
  completion: more subcommands in _git_notes()
  completion: complete --{reuse,reedit}-message= for all notes subcmds
  completion: simplify _git_notes
  completion: don't set PARSE_OPT_NOCOMPLETE on --rerere-autoupdate
  completion: use __gitcomp_builtin in _git_worktree
  completion: use __gitcomp_builtin in _git_tag
  completion: use __gitcomp_builtin in _git_status
  completion: use __gitcomp_builtin in _git_show_branch
  completion: use __gitcomp_builtin in _git_rm
  completion: use __gitcomp_builtin in _git_revert
  completion: use __gitcomp_builtin in _git_reset
  completion: use __gitcomp_builtin in _git_replace
  remote: force completing --mirror= instead of --mirror
  completion: use __gitcomp_builtin in _git_remote
  completion: use __gitcomp_builtin in _git_push
  completion: use __gitcomp_builtin in _git_pull
  completion: use __gitcomp_builtin in _git_notes
  completion: use __gitcomp_builtin in _git_name_rev
  completion: use __gitcomp_builtin in _git_mv
  completion: use __gitcomp_builtin in _git_merge_base
  ...

1 files changed, 1 insertions, 1 deletions

diff --git a/builtin/remote.c b/builtin/remote.c
index 6487d92abd..805ffc05cd 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -168,7 +168,7 @@ static int add(int argc, const char **argv)
 		OPT_STRING('m', "master", &master, N_("branch"), N_("master branch")),
 		{ OPTION_CALLBACK, 0, "mirror", &mirror, N_("push|fetch"),
 			N_("set up remote as a mirror to push to or fetch from"),
-			PARSE_OPT_OPTARG, parse_mirror_opt },
+			PARSE_OPT_OPTARG | PARSE_OPT_COMP_ARG, parse_mirror_opt },
 		OPT_END()
 	};