Simple SBT server plugin

sbt-simple-server

Simple SBT server plugin

Usage

  • In project/plugins.sbt addSbtPlugin("com.hanhuy.sbt" % "sbt-simple-server" % "0.4")
  • disablePlugins(SimpleServerPlugin) if desired, otherwise it will be automatically enabled
  • Run and use SBT like normal
  • Run the sbt-client.py script from the project you want to connect to remotely, anything that can be typed into an sbt repl can be typed into passed as an argument to sbt-client.py, add quotes if necessary.

How it works

Inspired by Eugene's writeup at http://eed3si9n.com/sbt-server-reboot, I decided to implement this personally without having to wait for anything to be integrated into SBT. The general idea is the same, except this is even further underengineered.

  • Replaces the shell command with server-shell
  • Runs a thread to loop over shell input, and runs a thread to read a network port assigned to the project (determined by taking the first 2 bytes of the canonical path hash until one is found that is over 1024)
  • Reads input from network and repl and throws it into a blocking queue
  • Every time the server-shell command is executed, a command is popped off the queue, polling until one is available if necessary.
  • Commands that come from the network have a result status passed to them to indicate whether they succeeded or failed, (0 for success, 1 for failure, 2 for command in-flight)