Support Rubinius gems binstubs location

[mislav]

Rubinius 2.0 configures RubyGems to install gem binstubs in PREFIX/gems/bin instead of just PREFIX/bin.

The reason given by evanphx is that Rubinius wants to avoid RubyGems' binstubs conflating with those from other Rubies. http://git.io/XBWGew

Fixes #178
/cc @sstephenson

[dstrelau]

This doesn't seem to work for me. This is rbenv installed via homebrew with this patch applied.

$ echo $RBENV_ROOT
/usr/local/var/rbenv
$ grep 'make_shims ' /usr/local/Cellar/rbenv/HEAD/libexec/rbenv-rehash
make_shims ../versions/*/{,gems/}bin/*
$ ls $RBENV_ROOT/versions/rbx-2.0.0/gems/bin/bundle
/usr/local/var/rbenv/versions/rbx-2.0.0/gems/bin/bundle*
$ rbenv rehash
$ rbenv shell rbx-2.0.0
$ bundle
rbenv: bundle: command not found

I'm not super familiar with rbenv internals or how to debug this. Am I missing something?

[mislav]

@dstrelau Thanks for checking this out. It turns out my brain is broken, as I just solved the Rubinius issue half way and never actually made a change that actually makes the shims work for Rubinius.

I've just pushed an additional commit that should take care of that. Running bundle should work for you now. Thanks for your feedback!

[dstrelau]

Awesome. This is working for me now. Thanks!

[ka8725]

When are you going to make release? Or how can I update rbenv through brew now to get this change?

[mislav]

@ka8725 Not sure if this will make it in the rbenv release. This is just an idea. If you want to use it, maybe @dstrelau can share steps to patching the Homebrew formula

[dstrelau]

@ka8725 I'm using this formula with brew install rbenv --HEAD. This is probably all sorts of wrong, but seems to work for me.

https://gist.github.com/dstrelau/6892770

[ka8725]

It's not suitable to install all ruby versions and their gems after upgrading... If I understand correctly after upgrading rbenv I can just move old rubies to new rbenv version's folder and it should work. Right? Also I applied this patch locally and I can approve that it works. 👍 for merge

[mislav]

@ka8725 If you have Ruby versions installed in different locations on your system and want to make them available in rbenv without re-installing, you can symlink them into rbenv's version directory:

ln -s /opt/rubies/ruby-2.0.0 ~/.rbenv/versions/2.0.0-p0

Don't move them with mv because that might break the Ruby installation.

[sferik]

@sstephenson Any thoughts on this?

[mislav]

Note that this PR is incomplete: I haven't patched whence yet. However, I'm not liking where this is going. It just burdens rbenv with unnecessary complexity.

I'd rather patch ruby-build instead to symlink gems/bin to point to bin. WDYT?

[sstephenson]

+1 to fixing this in ruby-build instead.

[mislav]

Nuking this with 🔥