Hello slightly smiling face can some please explain to me ho

Question

Hello slightly smiling face can some please explain to me how pants resolves the requirements I have a `python binary`target that has local dependencies that are compiled before the `pyprep`goal But when I execute the created PEX it does not include the compiled local dependencies

enough-analyst-54434 · Answer

There are two parts to requirement resolution depending on the flavor of requirement and it sounds like you have the first part set up Firstly a target must have a BUILD dependency on its requirements whether they be local say a `python library` BUILD target or third party Secondly in the third party case the dependency is on a `python requirement library` or requirements txt file via `python requirements` I ll stop there to find out more about your dependency setup

enough-analyst-54434 · Answer

I guess I can help things along more You say gt `python binary` target that has local dependencies that are compiled What do you mean by compiled what types of targets are these

thankful-needle-74204 · Answer

in my `python binary`target I have defined a local dependency However the modules for that package are created during a task before the `pyprep`goal And when the binary is created the modules are not found

thankful-needle-74204 · Answer

So basically my local package looks like this ``` package a py b py init py ``` a py and b py are created during a task

enough-analyst-54434 · Answer

Aha There is a fair bit of work to get generated code seen by Pants in general still We have that wrapped up in a base class here Do you happen to know if your task uses this base class It doesn t absolutely have to but if it does not it needs to be calling `self context add new target` and `self context build graph inject dependency`

enough-analyst-54434 · Answer

The 1st call to create a synthetic target to own the generated source files the 2nd to link the new target as a dependency

thankful-needle-74204 · Answer

but that does not allow me to add an existing target right Is there a way to overwrite it

enough-analyst-54434 · Answer

It does The general scheme is as follows Given targetA depends on targetB `targetA gt targetB` targetB has python code generated from the files it owns Then The code generating task 1 generates py files from targetB 2 creates a synthetic target targetBprime whose sources are the generate files from step 1 3 adds a dependency on targetBprime to targetA

enough-analyst-54434 · Answer

The SimpleCodeGen Task baseclass I referenced takes care of most of these mechanics letting your task pretty much just generate code

enough-analyst-54434 · Answer

So in the end you get `targetA gt targetB targetBprime `

enough-analyst-54434 · Answer

Does that make some sense

thankful-needle-74204 · Answer

Ah I see bulb Thank you very much blush