API v1.19 breaks tugboat.Methods#info

[bleporini]

For /info endpoint, API v1.19 changed some int values into boolean values, such as IPv4Forwarding, MemoryLimit and more.

So it's not compatible anymore with

tugboat/src/main/scala/Rep.scala

Line 22 in d63935b

memoryLimit: Int, swapLimit: Int, ipv4Forwarding: Int)

or

tugboat/src/main/scala/Rep.scala

Line 244 in d63935b

("MemoryLimit", JInt(memLim)) <- info

It seem to be the root cause for the following error when calling info:

head of empty list
java.util.NoSuchElementException: head of empty list
    at scala.collection.immutable.Nil$.head(List.scala:337)
    at scala.collection.immutable.Nil$.head(List.scala:334)
    at tugboat.Rep$$anon$7$$anonfun$map$4.apply(Rep.scala:250)
    at tugboat.Rep$$anon$7$$anonfun$map$4.apply(Rep.scala:230)
    at tugboat.Docker$Completion$$anon$2.onCompleted(Docker.scala:61)
    at com.ning.http.client.AsyncCompletionHandler.onCompleted(AsyncCompletionHandler.java:63)

References:

• https://docs.docker.com/reference/api/docker_remote_api_v1.18/#display-system-wide-information
• https://docs.docker.com/reference/api/docker_remote_api_v1.19/#display-system-wide-information