manifests/module.pp


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# Define an apache2 module. Debian packages place the module config
# into /etc/apache2/mods-available.
#
# You can add a custom require (string) if the module depends on 
# packages that aren't part of the default apache2 package. Because of 
# the package dependencies, apache2 will automagically be included.
define apache::module($ensure = 'present') {
  case $ensure {
    'present': {
      exec { "/usr/sbin/a2enmod $name":
        unless  => "/bin/sh -c '[ -L ${apache::mods}-enabled/${name}.load ] \
                && [ ${apache::mods}-enabled/${name}.load -ef ${apache::mods}-available/${name}.load ]'",
        notify  => Exec["force-reload-apache2"],
      }
    }
    'absent': {
      exec { "/usr/sbin/a2dismod -f $name":
        onlyif  => "/bin/sh -c '[ -L ${apache::mods}-enabled/${name}.load ] \
                && [ ${apache::mods}-enabled/${name}.load -ef ${apache::mods}-available/${name}.load ]'",
        notify  => Exec["force-reload-apache2"],
      }
    }
    default: { err ("Unknown ensure value: '$ensure'") }
  }
}