Automatically swap your tmux window to a vim file if an newer swap file already exists. If an older swap file exists, it is deleted. If no matching session is found, open read-only.

This is based on this talk from Damian Conway and derived from the autoswap_mac code that can be downloaded here

This works by looking at all tmux panes and checking their child processes to look for vim <filename>. As such, this won't work if you open a file in a buffer and is unlikely to work well for opening multiple files, files with arguments etc.