sbt - How to find out if invoking the compile task actually compiled anything

Question

I want to generate some Scala source code in my sbt build. I wrote the code generator as a subproject in my sbt build and added a Compile / sourceGenerators line to the main project settings that will invoke the code generator's run task. I also made sure I only invoke the run task when the code generator's input files have changed.

The thing is: not only the code generator's inputs can change, but also the code generator itself. I would therefore like to invoke the code generators compile task and see if anything had to be recompiled. If that's the case, I want to run the code generator again. Is this possible to do? The compile task returns a CompileAnalysis object, but how can I find out from this object if anything was recompiled?

question from:https://stackoverflow.com/questions/65862549/how-to-find-out-if-invoking-the-compile-task-actually-compiled-anything

Answer 1

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