Is there any way to run bash/zsh scripts that set environment
variables under fish?  I was hoping there'd be a function that did
something like:

1. Run printenv under fish, capture the output.
2. Run the script under bash, capture the output of printenv.
3. Diff the two printenv outputs, and run set commands within fish as
appropriate.

The script I'm especially trying to get working with fish at the moment is

https://github.com/postmodern/chruby/blob/master/share/chruby/chruby.sh

but it's a somewhat general problem.




Cheers,
Michael

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