I went to reinstall RVM (Ruby Version Manager) and got a message that the command wasn’t available. I realized, after fiddling around for a while that I didn’t have bash setup, and I had tried to run the standard quick install of:

[sourcecode language=”bash”]
bash < [/sourcecode]

…I had not setup bash shell as my shell on this Mac?! Oops. So since I’m a virtual noob sometimes, and I have no idea how to setup bash, I did some searching and came up with this solution.

First, switch to bash.

[sourcecode language=”bash”]
chsh -s bash
[/sourcecode]

Then create yourself a .bash_profile so that you’ll be able to initiate variables and such that you’ll need in the shell. These are used when working with Ruby, Rails, and a whole host of other things. To create a .bash_profile you can follow these commands.  (Snagged from this find)

[sourcecode language=”bash”]
cd ~/
touch .bash_profile
open -e .bash_profile
[/sourcecode]

Then add this to the bash file.

[sourcecode language=”bash”]
# place in ~/.bash_profile as the very last line
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"
[/sourcecode]

Now run the install (usually you’re told to setup this bash file afterwards, but figured we might as well get it done).

[sourcecode language=”bash”]
bash < [/sourcecode]

Next exit (or whatever your restart of bash technique is) and open your bash terminal back up. Type this command to be sure we’re on the right path.

[sourcecode language=”bash”]
type rvm | head -n1
[/sourcecode]

Now to install the latest Ruby on Rails bits you can issue a command like this.

[sourcecode language=”bash”]
rvm install 1.8.7
[/sourcecode]

However, OS-X already comes with 1.8.7, so you’d probably want to install 1.9.2. I issued the 1.8.7 install since I knew, previously, I’d dorked up the install a few days ago. So it is also a good way to make sure your install is cleaned up. I’m sure though, it could possibly mess things up if you’ve tweaked things the wrong way – but it sure seems to be the case that Ruby, Rails + RVM just works. 🙂

[sourcecode language=”bash”]
rvm install 1.9.2
[/sourcecode]

Once those are installed you’ll want to set one as default. I’m went with 1.9.2 for now. This can be changed later if need be.

[sourcecode language=”bash”]
rvm use 1.9.2 –default
[/sourcecode]

Anyway, that’ll get you started on OS-X if you’ve run into the “I’m only running the Terminal in its default setup, I need some bash” situation. 🙂

Happy coding, hacking, and gem installing!

References:

Some references are included above as links, but these below didn’t fit exactly in context at any point, I however used them none the less.

• Installing and Using RVM on Mac OS-X Creating Gemsets and Reverting to Original Environment