How to make fish shell use an rvm ruby by default

问题

I'm using fish shell 2.10 on Mac OS X 10.9.1. I would like to use a Ruby that I have installed using RVM as the default in my terminals, however I can't seem to make this work.

I've tried rvm use 2.1.0 --default but upon opening a new terminal I still get the following:

> which ruby
/usr/bin/ruby

Running the rvm command causes the ruby to be loaded:

> which ruby
/usr/bin/ruby
> rvm
[...]
> which ruby
/Users/alex/.rvm/rubies/ruby-2.1.0/bin/ruby

But it's annoying to have to do this every time I open a new terminal.

回答1:

Firstly install rvm fish functions from rvm.io

curl -L --create-dirs -o ~/.config/fish/functions/rvm.fish https://raw.github.com/lunks/fish-nuggets/master/functions/rvm.fish

You should now be able to use rvm command in fish after reopening terminal.

Run the following to add the line rvm default to your fish config file.

echo 'rvm default' >> ~/.config/fish/config.fish

You should now be able to use ruby related binaries and gems after reopening terminal.

回答2:

Install oh-my-fish very useful tools, have rvm plugin and many cool another.

Framework for managing your fish shell configuration

回答3:

I think to make it easier, you can add a rvm plugin to fish shell via fisher.

For install fisher:

curl -Lo ~/.config/fish/functions/fisher.fish --create-dirs git.io/fisher

After, install rvm plugin for Fish Shell:

fisher add jorgebucaran/fish-nvm

After that, rvm runs perfect.

(was fisher rvm previously)

回答4:

This below worked for me from the fish google group forum. credit eggegg for this solution below:

The original support for fish shell requires converting bash script to a fish script. As it mentioned here: https://rvm.io/integration/fish.

I found there's a simpler solution: let bash do the bash scripts, we only need the result of the environment variables.

Code: https://gist.github.com/eggegg/6077153

Just insert the first one into your own config.fish, then copy rvm.fish to ~/.config/fish/functions/ will do the tricks.

回答5:

This occurs because, out of the box, the Rubies installed through RVM aren't added to your path. When you run any RVM command, it adds the paths relative to the ruby version you're using to $PATH. RVM seems to take care of bash and zsh but doesn't have built-in support for correcting the paths for your dot files.

Here's an example of my path before an RVM command:

/Users/grant/pear/bin /usr/local/sbin/ /Users/grant/.rvm/bin /usr/local/bin /usr/bin /bin /usr/sbin /sbin /usr/local/git/bin /usr/local/go/bin

Here's an example of my path after running 'rvm':

/Users/grant/.rvm/gems/ruby-2.2.0/bin /Users/grant/.rvm/gems/ruby-2.2.0@global/bin /Users/grant/.rvm/rubies/ruby-2.2.0/bin /Users/grant/pear/bin /usr/local/sbin/ /Users/grant/.rvm/bin /usr/local/bin /usr/bin /bin /usr/sbin /sbin /usr/local/git/bin /usr/local/go/bin

The bottom line is that you'll want to add the .rvm files to your path depending on the version you default to. This post helped me figure out how to do that. You can append the paths that RVM adds to your fish profile with:

set -g -x PATH $PATH <paths_to_add>

Example from above:

set -g -x PATH $PATH /Users/grant/.rvm/gems/ruby-2.2.0/bin /Users/grant/.rvm/gems/ruby-2.2.0@global/bin /Users/grant/.rvm/rubies/ruby-2.2.0/bin

To have this run every time you load fish, add the above command to ~/.config/fish/config.fish. Alternatively, you can add the rvm command to your fish config and have it load it for you.

Hope this helps! -Grant