Can I have resources on a in-repo plugin? it seems in-repo plugin ignore the BUILD files. I have a plugin at

pants-plugin/jvm_stage

, BUILD file:

python_sources(resolve="pants-plugins", dependencies=[":java_resources"])
resources(name="java_resources", sources=["*.java", "strip_jar.lock"])

java_sources(name="strip_jar", resolve="strip_jar_dev")

jvm_artifact(
    name="reproducible-builds-jvm-stripper",
    group="net.bzzt",
    artifact="reproducible-builds-jvm-stripper",    
    version="0.9",
    resolve="strip_jar_dev",
    packages=["io.github.zlika.reproducible.**"]
)

then in the plugin I'm trying:

@rule
def generate_strip_jar_lockfile_request(
    _: StripJarToolLockfileSentinel,
) -> GenerateJvmLockfileFromTool:
    return GenerateJvmLockfileFromTool(
        artifact_inputs=FrozenOrderedSet(
            {
                "net.bzzt:reproducible-builds-jvm-stripper:0.9",                
            }
        ),
        artifact_option_name="n/a",
        lockfile_option_name="n/a",
        resolve_name=StripJarToolLockfileSentinel.resolve_name,
        read_lockfile_dest=DEFAULT_TOOL_LOCKFILE,
        write_lockfile_dest="pants-plugins/jvm_stage/strip_jar.lock",
        default_lockfile_resource=(
            "jvm_stage",
            "strip_jar.lock",
        ),
    )

When I'm trying the plugin it fails with:

Engine traceback:
  in select
  in pants.core.goals.package.package_asset
  in jvm_stage.rules.package_jvm_stage (modules/maitred-node/src/unit/maitred/node:main)
  in jvm_stage.strip_jar.resolve_fallible_result_to_strip_jar
  in jvm_stage.strip_jar.strip_jar
  in jvm_stage.strip_jar.build_processors
  in pants.jvm.resolve.coursier_fetch.materialize_classpath_for_tool
Traceback (most recent call last):
  File "/opt/homebrew/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/resources.py", line 97, in open_binary
    return open(full_path, mode='rb')
FileNotFoundError: [Errno 2] No such file or directory: '/Users/somdoron/git/unit-finance/strip_jar.lock'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/somdoron/.cache/pants/setup/bootstrap-Darwin-arm64/pants.sVxb8A/install/lib/python3.9/site-packages/pants/engine/internals/selectors.py", line 705, in native_engine_generator_send
    res = func.send(arg)
  File "/Users/somdoron/.cache/pants/setup/bootstrap-Darwin-arm64/pants.sVxb8A/install/lib/python3.9/site-packages/pants/jvm/resolve/coursier_fetch.py", line 744, in materialize_classpath_for_tool
    lockfile_bytes = importlib.resources.read_binary(
  File "/opt/homebrew/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/resources.py", line 126, in read_binary
    with open_binary(package, resource) as fp:
  File "/opt/homebrew/Cellar/python@3.9/3.9.12_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/resources.py", line 111, in open_binary
    raise FileNotFoundError(message)
FileNotFoundError: 'strip_jar.lock' resource not found in 'jvm_stage'

What am I missing?

Am I understanding correctly that your plugin is trying to create

strip_jar.lock

? So that warning about it not existing is correct?

it was suppose to exist as resource, anyway, the issue was

init.py

file was missing, it works now with the example above.

Ah great