def find_servers(options={})
return [] if options.key?(:hosts) && (options[:hosts].nil? || [] == options[:hosts])
return [] if options.key?(:roles) && (options[:roles].nil? || [] == options[:roles])
hosts = server_list_from(ENV['HOSTS'] || options[:hosts])
if hosts.any?
if options[:skip_hostfilter]
hosts.uniq
else
filter_server_list(hosts.uniq)
end
else
roles = role_list_from(ENV['ROLES'] || options[:roles] || self.roles.keys)
roles = roles & Array(options[:roles]) if preserve_roles && !options[:roles].nil?
only = options[:only] || {}
except = options[:except] || {}
servers = roles.inject([]) { |list, role| list.concat(self.roles[role] || []) }
servers = servers.select { |server| only.all? { |key,value| server.options[key] == value } }
servers = servers.reject { |server| except.any? { |key,value| server.options[key] == value } }
if options[:skip_hostfilter]
servers.uniq
else
filter_server_list(servers.uniq)
end
end
end