`rbenv shell` and fish
Last time I switched to fish shell and have some problems with rbenv shell command. So I needed to write own wrapper that simulate function provided by rbenv init - and here it go:
set -x PATH $HOME/.rbenv/shims $PATH
rbenv rehash >/dev/null ^&1
function rbenv_shell
set -l vers $argv[1]
switch "$vers"
case '--complete'
echo '--unset'
echo 'system'
exec rbenv-versions --bare
return
case '--unset'
set -e RBENV_VERSION
case ''
if [ -z "$RBENV_VERSION" ]
echo "rbenv: no shell-specific version configured" >&2
return 1
else
echo "$RBENV_VERSION"
end
case '*'
rbenv prefix "$vers" > /dev/null
set -g -x RBENV_VERSION "$vers"
end
end
function rbenv
set -l command $argv[1]
[ (count $argv) -gt 1 ]; and set -l args $argv[2..-1]
switch "$command"
case shell
rbenv_shell $args
case '*'
command rbenv $command $args
end
endWritten by Łukasz Niemier
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11 Responses
Thanks, I spent an hour on this.
Minor bug: you can add [ (count $argv) -eq 0 ]; and set -l command '' at 32th line to prevent bug on invoking rbenv without an argument =P
@jtomaszewski There is no need to do that. In fish (like in any other shell) when you try to access to non-existent variable then you get empty value.
Well, yes, but even that, it triggers an error on switch command. f.e. switch $idontexist; end
@jtomaszewski give example when this snippet doesn't work. I cannot found that one. But if it really bother you then you can write set -l command "$argv[1]".
Yeah, your way is better. The example is this and only this: rbenv. Ofcourse, unless you're not lazy as me, you can always write rbenv help.
Anyway, nevermind, the problem is unimportant.
@jtomaszewski Fish allow setting empty variables so there is no need to create fallback to empty string, so if there is no arguments then rbenv will be called without any arguments. Everything works as expected.
@hauleth It is not in the creation that the error happens, but in the switch. It doesn't matter if the variable exists or is empty because the variable is expanded and the result is a switch call without arguments. If you enclose it in quotes, like you did in the rbenv_shell function then you have one argument that happens to be empty. ;D
Thanks for this. It is great. Have you considered submitting it to oh-my-fish?
@hauleth Ok, one more problem: You are returning 1 after --unset. Also, unless I am misunderstanding the way return and switch work on fish, empty returns don't seem necessary since they are each the last command of the function.
rbenv master now supports fish:
$ rbenv init fish
# Load rbenv automatically by adding
# the following to ~/.config/fish/config.fish:
. (rbenv init -|psub)
Thank you, this worked.
