In trying to harmonize environments between a ZSH session and the vim/macvim access of the shell, a which ruby
from the shell shows $HOME/.rvm/rubies/ruby-1
I don't know if it applies to zsh but depending on how it's started, bash reads some files and not others. Having this line in my ~/.vimrc
ensures that $PATH
is the same in Vim and in my shell.
set shell=bash\ -i
But it depends on how you start/customize your shell.
See :help 'shell'
and zsh's manual.
The answer given here worked for me pretty well:
How to use correct ruby in vim ? How to modify $PATH in VIM?
And the explanation given for the different $PATH in interactive and non-interactive mode is straightforward:
https://github.com/dotphiles/dotzsh#mac-os-x
Maybe :$PATH=$HOME.'/.rvm/rubies/ruby-1.9.3/bin/ruby:'.$PATH
in your vimrc. Probably hacky, but maybe it'll work.