New command: activate

[eproxus]

I want a new command, activate (or similar name) that activates a given installation:

$ kerl list installations
r14b03_hipe_native /Users/alind/Applications/erlang/r14b03_hipe_native
r13b04_hipe /Users/alind/Applications/erlang/r13b04_hipe
r13b04 /Users/alind/Applications/erlang/r13b04

kerl activate r13b04 would call activate in the /Users/alind/Applications/erlang/r13b04 folder:

$ kerl activate r13b04
$ kerl active
The current active installation is:
/Users/alind/Applications/erlang/r13b04

[evax]

This would require spawning a new nested shell with an updated environment, and kerl makes no assumption on the shell being used.

[eproxus]

I see, I was afraid of that. There's no other shell trickery that can be used to avoid that?

[evax]

The only thing I can think of at the moment would be to allow the command only if you specified your favorite shell in you .kerlrc file, something like KERL_SHELL_COMMAND="/bin/bash" or whatever.
Would that suit you?

[eproxus]

It would create some nested shells, but that would be fine for me. If you want to avoid that you could just use the normal activation command.