gistfile1.txt

Tree
/etc/puppet/environments/production/applications/myapplication
    manifest/nginx.pp
    templates/nginx/rewrites.erb

In the nginx class in nginx.pp

    file { $nginx_rules_location:
        mode    => '0664',
        owner   => 'liferay',
        group   => 'liferay',
        content => template("${module_name}/nginx/rewrites.erb"),
        tag => ['nginx_rules'],
    }

Error message:

Error: /Stage[main]/Application_myapp::Env::Nginx/File[/opt/tomcat/sites/liferay/nginx_rules.conf]: Could not evaluate: Could not retrieve file metadata for puppet:///${module_name}/nginx-rewrites: Cannot find file: Invalid mount '${module_name}'

Using puppet-nginx module from https://github.com/Proteon/puppet-nginx

Using content => template("file") instead of source => 'puppet:///file'.

Also using double quotes instead of single, otherwise puppet can't extrapolate ${module_name}.