run binaries from specific gem version...

[TJM]

I have a puppet module (that is far from ready for human consumption) to setup Nginx, passenger, rails, etc... following the example that RVM has for Apache. I am still using this RVM module for all things RVM. I just copied the passenger section to my own module and modified it to work for nginx. One problem that I recently had was how to select a specific version of the passenger gem to run the "passenger-install-nginx" from...

I have something that looks like:

  $rvm = "${rvm_prefix}rvm/bin/rvm"
  $passenger_module = "${ruby_version}/gems/passenger-${passenger_version}"

  exec { 'passenger-install-nginx-module':
    command     => "${rvm} ${ruby_version} exec passenger-install-nginx-module --auto --auto-download --prefix=${nginx_prefix}",
    environment => 'HOME=/root',
    provider    => shell,
    unless      => "[ -x ${nginx_prefix}/sbin/nginx ] && ${nginx_prefix}/sbin/nginx -V 2>&1 | grep -q ${passenger_module}",
    logoutput   => 'on_failure',
    require     => Class['rvm::passenger::gem'],
    subscribe   => [ Class['rvm::passenger::gem'], Rvm_system_ruby[$ruby_version] ],
  }

... and all was well until one day I changed the yaml file that selects the passenger version (in error, but whatever) to a lower version number (4.0.41 instead of 4.0.45 or whatever). The problem was that each time puppet ran, it would try to re-run the passenger-install-nginx-module because it was specifically looking for 4.0.41, and each time it ran that exec, it would select the newest version.

Consider this is probably a support request for an RVM/ruby novice ;)

~tommy

[TJM]

I think the "subscribe" line is unneeded, another developer added that to attempt to detect ruby version changes... I added the "unless .... grep -q ${passenger_module}" part.. as that checks both ruby version and passenger module.

I think I could just do something like ${rvm_prefix}gems/${passenger_module}/bin/passenger-install-nginx_module ... but that "feels" wrong somehow? Is it?

Speaking of which, how does your apache version detect ruby/passenger version changes to recompile the module?