There's one but there was a problem for fish on mac until a few minutes ago...

(I made a new release)

works for me now, thanks!

+1; the documentation says fish is supported, but the shell command fails with "I found neither .bashrc nor .zshrc."

Also: might want to fall back to .profile if .bashrc isn't found...

Works for me. The "Installation" page includes the phrase " (supported shells today are bash, zsh and fish)," for it in the section on the shell function.