[chef] Conditional resource creation / script execution

[Sébastien Pierre < >]

Hello,

I would like to know how to write "conditional" parts for recipies.

For instance, I would like to check if there is a "~/.ssh/id_dsa.pub" file and create it if necessary. Right now, the solution is rather inelegant

script "ssh-keygen" do

interpreter "bash"

user        "manage"

cwd         (HOME)

code        "mkdir ssh-temp"

code        "ssh-keygen -t dsa -f ssh-temp/id_dsa << EOF\n\nEOF"

code <<-EOH

if [ ! -f .ssh/id_dsa.pub ]; then

mv ssh-temp/* .ssh/

fi

rm -rf ssh-temp

EOH

end

while I would prefer

unless (File exists (HOME + "/.ssh/id_dsa.pub") script do

interpreter "bash"

user        "manage"

cwd         (HOME)

code        "ssh-keygen -t dsa -f ssh-temp/id_dsa << EOF\n\nEOF"

end

Is there a way to do this properly ?

 -- Sébastien