docker_helper.rb in mkit-0.4.2

- old
+ new

@@ -1,10 +1,11 @@
+# frozen_string_literal: true
+
 require 'mkit/cmd_runner'
 
 module MKIt
   module DockerHelper
-
     # from ERB template
     def create_instance(cmd)
       MKIt::CmdRunner.run(cmd)
     end
 
@@ -20,11 +21,11 @@
       MKIt::CmdRunner.run("docker rm -f #{instance}")
     end
 
     def inspect_instance(instance_id)
       # this one does not work on ubunto MKIt::CmdRunner.run("docker inspect #{instance_id}")
-      x = %x{docker inspect #{instance_id}}
+      x = `docker inspect #{instance_id}`
       JSON.parse(x).first
     end
 
     def execute_local(instance_id, cmd)
       MKIt::CmdRunner.run("docker exec -it #{instance_id} #{cmd}")
@@ -37,10 +38,10 @@
     def create_network(network_name)
       MKIt::CmdRunner.run("docker network create #{network_name}")
     end
 
     def network_exists?(network_name)
-      x = MKIt::CmdRunner.run("docker network ls")
+      x = MKIt::CmdRunner.run('docker network ls')
       x.match(/\b#{network_name}\b/)
     end
 
     def dettach_network(network_id, instance_id)
       MKIt::CmdRunner.run("docker network disconnect #{network_id} #{instance_id}")