I'm using rvm-prompt. It seems the interpreter, the version, the patchlevel, and the gemset should all displayed by default.
If I call the prompt, it accurately returns the current ruby and gemset:
$ rvm-prompt
ruby-1.8.7-p302@rails125
But my gemset isn't reflected in my prompt:
ruby-1.8.7-p302 MacBook:~ subpixel$
I tried calling the gemset explicitly in .bash_profile with:
PS1="\$(~/.rvm/bin/rvm-prompt i v p g) $PS1"
but it doesn't change the prompt.
If you look at the documentation for rvm-prompt, at the bottom of the page you'll find the following:
ps1_functions
Recently there has been a pair programming session that turned out a useful bit of prompt setting code. It now resides in contrib/ so you can require it in your profiles as follows after sourcing RVM itself.
source "$rvm_path/contrib/ps1_functions"
Immediately after that you can customize your prompt by adding the following line
ps1_set
There is an article and screen cast associated with this in the community resources section.
I copied the ps1_functions file, changed it to suit my needs and source that in my .bash_profile. Then I just have a line that calls
ps1_set
Now my prompt changes when I change gemsets
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