is there a way to keep the `sources` field default but w som

Question

is there a way to keep the `sources` field default but w some extras

hundreds-father-404 · Answer

there is not Which target type

ambitious-actor-36781 · Answer

python sources

ambitious-actor-36781 · Answer

would be cool if it was available in macros or something so you could do ```def a macro python sources sources=python sources sources default + the devil py ```

hundreds-father-404 · Answer

It is possible to do that via the Target API Which is pretty light weight and declarative no need to use Rules etc See the tool tip Using the fields of a pre existing target type <https www pantsbuild org v2 8 docs target api new targets step 1 define the target type> You d use all the same fields except for subclassing `PythonSourcesGeneratingSourcesField` w a different `default` class property

hundreds-father-404 · Answer

It does require that you use a new symbol in your BUILD files rather than `python sources` tho just like macros

ambitious-actor-36781 · Answer

oh yeah can do it that way

hundreds-father-404 · Answer

There s a gotcha that PluginFields will not be registered on your new target type which are all the fields like `skip flake8` and `skip mypy` If you need those you ll have to include them in the `core fields` of your target They re not in the `PythonSourcesGeneratorTarget core fields`