perhaps a quick question to be sure that I don't go in a wall. Somebody told me on this chanel that code gen needs to be run before compile. This statement is only valid for one target, right ? If a code gen target

a

depends on java_library target

b

, code gen of

a

is run after compilation of

b

?

False. Today all codegen is done in a single pass. Compiles then come after, they cannot interleave.

(this is only if you're asking about pants task(s) you are developing -- the dilemma john described is one of the things that the v2 engine's declarative model makes easier in some ways. but if you need to, for example, run a task that generates code, then run another task that generates code off of that, you can override the

product_types()

and

prepare()

classmethods on your tasks in order to enforce an ordering between the two code generating tasks -- you have probably seen this page already: https://www.pantsbuild.org/dev_tasks.html)

To clarify, currently all tasks registered in the “codegen” goal are done in a single pass. But you can register yours in a “myspecialcodegen” goal and set up the product dependencies as needed.

thanks benjy that is a crucial point i completely missed

thank you for the anwers !