[PATCH 1/1] add--interactive: skip index refresh in reset patch mode

["Nika Layzell via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Nika Layzell <nika@xxxxxxxxxxxxxxx>

Uses the FILTER flag on patch flavours in git-add--interactive to
determine if the initial index refresh call is required. It is not
required for the reset patch modes, which use the 'index-only' filter,
as they do not interact with the worktree, so do not need up-to-date
stat information.

The refresh call can be quite expensive, especially on larger
checkouts or with a freshly created index file.

Signed-off-by: Nika Layzell <nika@xxxxxxxxxxxxxxx>
---
 git-add--interactive.perl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/git-add--interactive.perl b/git-add--interactive.perl
index c20ae9e210..cd435b197f 100755
--- a/git-add--interactive.perl
+++ b/git-add--interactive.perl
@@ -1861,7 +1861,9 @@ sub main_loop {
 }
 
 process_args();
-refresh();
+if ($patch_mode_flavour{FILTER} ne 'index-only') {
+	refresh();
+}
 if ($patch_mode_only) {
 	patch_update_cmd();
 }
-- 
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