SBT apply Task after Compile
compilation, sbt, scala, task
Solution
In general, there is some task that depends on your task.
If `compile` is being used to mean "compile and set things up for Grunt", then create a `prepareGrunt` task that depends on `compile` and `myTask` and run that instead.
If `myTask` should run before the project's classes and resources are used by something else, then make it a dependency of `exportedProducts`. Tasks like `run` and `test` and tasks in dependent projects will get the exported classpath entries from that task.
The danger in "run sometime after compile" is that `myTask` won't be run before the task that actually needs it. There is the `triggeredBy` method on `Initialize[Task[T]]`, but it is easily abused and should only be used when the output of the task is known to be used only after all tasks execute.
Problem
I am able to automatically execute a task before compilation with: ``` compile in Compile <<= (compile in Compile).dependsOn(myTask) ``` How do I do the same but after compile? I know I can do: ``` compile in Compile <<= (compile in Compile) map{x=> // post-compile work doFoo() x } ``` to execute arbitrary Scala code, but I need to automatically execute the target task itself when a compile event occurs Doing something like: ``` val foo = TaskKey[Unit]("foo", "...") val fooTask = foo <<= scalaInstance map {si => ... } dependsOn(compile in Compile) ``` works if I type "foo" from sbt> prompt; i.e. task is executed after compile, but the goal is to hook into compile task itself, so anytime a compilation occurs, the foo task is automatically called after compilation completes. Is this possible, or am I going about things in the wrong way to hook into the built-in compile task?