eval (rbenv init -) is broken on fish

[davidcelis]

I have the following in my config.fish file, running with the latest versions of fish and rbenv from homebrew:

if test -d ~/.rbenv
  eval (rbenv init -)
end

When I start a shell, I get the following error:

rbenv: no such command `sh-'

Based on what rbenv init - returns for fish shell…

setenv PATH '/Users/davidcelis/.rbenv/shims' $PATH
setenv RBENV_SHELL fish
. '/usr/local/Cellar/rbenv/1.0.0/libexec/../completions/rbenv.fish'
command rbenv rehash 2>/dev/null
function rbenv
  set command $argv[1]
  set -e argv[1]

  switch "$command"
  case rehash shell
    . (rbenv "sh-$command" $argv|psub)
  case '*'
    command rbenv "$command" $argv
  end
end

… I'm wondering if something is wrong in setting $command for fish.

[davidcelis]

A workaround is directly calling

source (rbenv init - | psub)

like the above output seems to intend

[mislav]

This is known and documented. If you run rbenv init fish, you will get instructions how to add rbenv init to your shell rc file:

$ rbenv init fish
# Load rbenv automatically by appending
# the following to ~/.config/fish/config.fish:

status --is-interactive; and . (rbenv init -|psub)

[davidcelis]

Hmmm, I pored through the README and Wiki but I didn't see any instructions like that for fish, and nothing about passing the name of the shell to rbenv init anywhere… Not findable enough, maybe? The most I saw consistently were bash and zsh instructions…

[mislav]

It's true that we should be telling people to run rbenv init to get instructions for their current shell, instead of giving people instructions for bash only. Maybe change step (3) of installation to suggest that you should run ~/.rbenv/bin/rbenv init and follow the instructions given?

[davidcelis]

Yeah, that'd do it! 👍

[ElijahLynn]

Current shell instructions were added to the README.md in this commit 35ca51f