After upgrading to version 1.3.0, sbt started throwing "docker: 'version --format '{{.Server.Version}}'' not a docker command" warnings on console

[kpritam]

Expected behaviour

Upgrading to packager version 1.3.0 should not result into any warnings on console
E.g. Just run sbt

Actual behaviour

After upgrading to sbt-native-packager 1.3.0, can see following warnings on sbt console:
docker: 'version --format '{{.Server.Version}}'' is not a docker command.

I have docker v17.09.0-ce-mac35 (19611) installed on my machine and it does give me correct version when above command is run from separate terminal:
~/T/csw-prod:master$ docker version --format '{{.Server.Version}}'
17.09.0-ce

Information

• What sbt-native-packager are you using?
  1.3.0

• What sbt version
  1.0.2

• What is your build system (e.g. Ubuntu, MacOS, Windows, Debian )
  macOs (iterm2 3.1.3)

[muuki88]

Thanks for your detailed bug request and trying out the new release.
I hope this is not an issue with the way java spawns external processes. I'm not familiar with docker on mac, but there is still a vm involved to run docker, right?

cc @mrfyda

[kpritam]

No, Docker has added native support for mac hence VM is not involved.