Defining sbt task that invokes method from project code?

Question

I\'m using SBT to build a scala project. I want to define a very simple task, that when I input generate in sbt:

sbt> generate

Answer 1

In .sbt format, do:

lazy val generate = taskKey[Unit]("Generate my file")

fullRunTask(generate, Compile, "my.App")

This is documented at http://www.scala-sbt.org/0.13.2/docs/faq.html, “How can I create a custom run task, in addition to run?”

Another approach would be:

lazy val generate = taskKey[Unit]("Generate my file")

generate := (runMain in Compile).toTask(" my.App").value

which works fine in simple cases but isn't as customizable.

Update: Jacek's advice to use resourceGenerators or sourceGenerators instead is good, if it fits your use case — can't tell from your description whether it does.