I had a bit of an adventure this morning getting Ruby 2.0 installed on my mac with Mountain Lion, so I thought I’d share the tale with you in case it can help save you some time on doing the same. Up until now I’ve been developing my Rails apps with 1.9.3, but it was time to upgrade and experience all the new hotness of the latest Ruby. I had tried to install Ruby 2.0 before, but I had been stymied by an openssl error when building. Today was to day to get that sorted.
I’m using rbenv to manage the different Ruby versions on my machine, so the first step was to update ruby-build, which I have installed via homebrew, so that I could fetch and build the latest Ruby. Sadly, I had some weirdness with my homebrew installation that prevented me from getting the latest homebrew, which prevented me from getting the latest ruby-build, which prevented me from being able to install the latest Ruby (2.0.0-p247):
$ brew update error: Your local changes to the following files would be overwritten by merge: ...
I was pretty sure I hadn’t changed anything in homebrew myself, and I found some guidance in the github issues list for homebrew that I should just blow away my local changes with a git reset, which didn’t initially work because apparently some permissions had changed in /usr/local:
$ cd /usr/local/Library $ git reset --hard FETCH_HEAD error: unable to unlink old 'README.md' (Permission denied) error: unable to unlink old 'SUPPORTERS.md' (Permission denied) fatal: Could not reset index file to revision 'FETCH_HEAD'. $ sudo chown -R `whoami` /usr/local $ git stash && git clean -d -f $ brew update
Now I was in business. Next up I upgraded ruby-build, and since I had already installed openssl via homebrew previously, I could use that while compiling:
$ brew upgrade ruby-build $ env CONFIGURE_OPTS='--with-openssl-dir=/usr/local/opt/openssl' rbenv install 2.0.0-p247
Boom! Ruby 2.0 was finally installed. But then I hit a snag while trying to install gems for one of my Rails projects:
$ bundle Could not verify the SSL certificate for https://code.stripe.com/. There is a chance you are experiencing a man-in-the-middle attack, but most likely your system doesn't have the CA certificates needed for verification. For information about OpenSSL certificates, see bit.ly/ruby-ssl. To connect without using SSL, edit your Gemfile sources and change 'https' to 'http'.
That was an especially useful error message, since that link provided a tip on easily getting some updated ssl certificates:
$ brew install curl-ca-bundle
And that tells you to
$ export SSL_CERT_FILE=/usr/local/opt/curl-ca-bundle/share/ca-bundle.crt
And now everything works. Woohoo!
Update - September, 2014: According to this issue, something has changed in homebrew that makes this change break things. So try leaving out that step.