From c1bc825facd8cb404ef6c42017973c5dbe00630e Mon Sep 17 00:00:00 2001
From: Avi Drissman <avi@drissman.com>
Date: Tue, 9 Apr 2024 19:03:25 -0400
Subject: [PATCH] Ignore unexpected file modes (#549)

Ignore unexpected file modes

On the Mac, git fsmonitor uses a domain socket in the .git/ folder to keep track of the fsmonitor process. cas chokes on that (see https://crbug.com/40270112).

Therefore, ignore domain sockets.
---
 go/pkg/cas/upload.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/go/pkg/cas/upload.go b/go/pkg/cas/upload.go
index 9a9f3188a..991c1c2f7 100644
--- a/go/pkg/cas/upload.go
+++ b/go/pkg/cas/upload.go
@@ -559,8 +559,10 @@ func (u *uploader) visitPath(ctx context.Context, absPath string, info os.FileIn
 			node, err := u.visitRegularFile(ctx, absPath, info)
 			return &digested{dirEntry: node, digest: node.GetDigest()}, err
 
+		// Ignore all non-expected modes (e.g. domain sockets as used by git
+		// fsmonitor).
 		default:
-			return nil, fmt.Errorf("unexpected file mode %s", info.Mode())
+			return nil, nil
 		}
 	})
 	if err != nil {