Shell command execution

[zerok]

Motivation

Docker for mac recently changed the IP address and hostname that exposes the host machine to the Docker container from 192.168.65.1 to 192.168.65.2 (docker.for.mac.host.internal). Since hardcoding such a value into the configuration is rather sub-optimal something like this should be possible:

{{ $host := .System.ShellOutput 'docker run --rm -i -t --entrypoint /bin/ash alpine:latest -c \'eval "/usr/bin/nslookup docker.for.mac.host.internal | grep \'Address 1\' | cut -d \' \' -f 3"\'' }}