dead simple chef rvm installation script fails - rvm

Question

What I have: Chef;
What I need: RVM installed for node[:deploy][:user][:name]. I need user-wide install, not system-wide.
What I tried latest:
script 'install_rvm' do
user = node[:deploy][:user][:name]
interpreter '/bin/bash'
code "su -l #{user} -c '\curl https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer | bash -s stable'"
not_if { ::File.exists? "/home/#{user}/.rvm" }
end
When I manually run su -l <username> -c '\curl <long_url> | bash -s stable' on test server surely it works perfectly.
I expect Chef to run the same code, and in logs it seems like it does, but the next execute resource fails because in fact there is no /home/<username>/.rvm present.
Yes I know that in Chef I can specify user as user node[:deploy][:user][:name] instead of changing user with su but for some reason if I do that rvm would try to install itself in /root/.rvm (env not properly reset?).
Well, I would like to ask, why is Chef so extremely crappy even for such dead-simple tasks, but it looks like I've chosen the wrong place, so the question is what am I doing wrong or do I miss something obvious?

Answer 1

why not use chef-rvm from Fletcher Nichol - it is the supported way to deal with RVM in Chef.

Answer 2

Well, at least that worked and may be useful if all better ways to do it with Chef fail for you. Here is the resource for installing ruby
execute 'install_rvm' do
user('root')
user = node[:deploy][:user][:name]
command "su -l #{user} -c '\curl https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer | bash -s stable'"
not_if { ::File.exists? "/home/#{user}/.rvm" }
end
And the bonus one to create gemset if it is not already present:
execute 'rvm_install_ruby' do
user('root')
user = node[:deploy][:user][:name]
ruby = node[:deploy][:ruby]
gemset = node[:deploy][:gemset]
command "su -l #{user} -c 'rvm use #{ruby}##{gemset} --install --create'"
not_if do
if latest_patchlevel = `rvm list`.scan(/(ruby-#{ruby}-p)(\d+)/).map{ |a| a.last.to_i }.sort.last
`rvm list gemsets`.match /ruby-#{ruby}-p#{latest_patchlevel}##{gemset}/
end
end
end