Load RUBIES from common directories

[postmodern]

We should load RUBIES from common directories where Rubies are commonly installed.

• /usr/local/rubies/
• /opt/rubies/
• ~/.rubies/

[postmodern]

This can be done with:

RUBIES=({/usr/local,/opt,$HOME}/rubies/*)

[postmodern]

Hmm nope:

   jruby-1.7.0
   rubinius-2.0.0-rc1
   ruby-1.9.3-p327
   ruby-2.0.0-preview2
   *
   *

[postmodern]

Better solution from @havenwood:

RUBIES=$(for path in {/usr/local/rubies,/opt/rubies,$HOME/.rubies}/*; do echo $path; done)

[postmodern]

or we could just append them to an empty Array:

RUBIES=()

for path in {/usr/local/rubies,/opt/rubies,$HOME/.rubies}/*; do
  [[ -x $path/bin/ruby ]] && RUBIES+=($path)
done

[postmodern]

Arg, zsh strikes again:

>>> Running tests under /usr/bin/zsh ...
./share/chruby/chruby.sh:3: no matches found: /opt/rubies/*

[postmodern]

for rubies in /usr/rubies /usr/local/rubies /opt/rubies "$HOME"/.rubies; do
    [[ -d "$rubies" ]] && RUBIES+=("$rubies"/*)
done

I removed the [[ -x $path/bin/ruby ]] check, since a user could set RUBIES to any list of directories and no error would be raised. Better to fail consistently.

[havenwood]

for rubies in /opt/rubies /usr/rubies /usr/local/rubies "$HOME"/.rubies "$HOME"/.rvm/rubies "$HOME"/.rbfu/rubies "$HOME"/.rbenv/versions; do
  [[ -d "$rubies" ]] && RUBIES+=("$rubies"/*)
done

Too much to include migration directories as common directories? Would allow us to autodetect existing installed Rubies for users migrating to chruby.

[postmodern]

I think that should be an explicit choice by the user. That way they don't forget about ~/.rvm/rubies or ~/.rbenv/versions while using chruby. Also, I'm guessing most users will rvm implode or rm -rf ~/.rbenv beforehand.

[postmodern]

Merged into the 0.3.0.

[postmodern]

This has been released in 0.3.0.