When trying to install pg gem: Brew bad interpreter error and not existing ruby version

Question

I've really made something wrong when re-installing ruby, rails, xcode etc. (maybe even I've deleted my system Ruby installation :/ ) Here's what I have now:

System: OSX 10.8.2 (64-bit)

which ruby gives me /usr/local/bin/ruby

I have installed ruby 1.9.3p286, Rails 3.2.8 and rvm 1.16.17 (stable)

I've installed Ruby and Rails by going with this tips: http://hivelogic.com/articles/compiling-ruby-rubygems-and-rails-on-snow-leopard

Next I wanted to run gem install pg but I've got an error: No such file or directory - brew --prefix

I've tried hit just the brew command but I've got another error: /usr/local/bin/brew: bad interpreter: /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin: no such file or directory

So there is my question (I have installed brew earlier) - why it points on this path of 1.8 Ruby if I don't have this version of Ruby installed? Can I somehow change this path to my current one with ruby(that from which ruby command?)? How fix this brew error? Please help!

Answer 1

Okay, I got it - I've edited the file: /usr/local/bin/brew and edited ther (first line) the path: from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin to /usr/local/bin/ruby/ and it works now..

Anyone knows how to change default system Ruby path to this one? (to avoid problems with other programs in the future).

Answer 2

That didn't work for me but it set me on the right track..... I had to do this:

sudo ln -s /usr/local/bin/ruby /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby

(and make the bin directory before hand)