lib/cide/docker.rb in cide-0.1.1 vs lib/cide/docker.rb in cide-0.2.0

@@ -15,10 +15,12 @@
         @exitstatus = exitstatus
         super("Failed with exitstatus #{exitstatus}")
       end
     end
 
+    class VersionError < StandardError; end
+
     def docker(*args, **opts)
       setup_docker
 
       ret = run Shellwords.join(['docker'] + args), opts
       exitstatus = $?.exitstatus
@@ -40,9 +42,16 @@
 
           `boot2docker shellinit 2>/dev/null`
             .lines
             .grep(/export (\w+)=(.*)/) { ENV[$1] = $2.strip }
         end
+
+        # Check docker version
+        unless `docker version 2>/dev/null` =~ /Client version: ([^\s]+)/
+          fail VersionError, 'Unknown docker version'
+        end
+        fail VersionError, "Docker version #{$1} too old" if $1 < '1.5.0'
+
         true
       )
     end
   end
 end