files.exists relies on SSH commands

[powerriegel]

Hello,
I'm using patchwork 1.0.1 with python 3.10.12 and Fabric 2.7.1.

I want to check if a file exists on a pure SFTP server (no SSH). This fails because files.exists uses test-e to check wether the file exists. This command is not available on pure sftp via openssh.