licenses_info_to_json failed as the TransitiveLicensesInfo is empty

[dhmemi]

Expected Behavior

Rule Usage example:

load("@rules_license//rules:compliance.bzl", "check_license")

check_license(
    name = "third_party_licenses",
    license_texts = "third_party_licenses.txt",
    report = "third_party_reports.txt",
    deps = _ROOT_TARGETS,
)

Actual Behavior

ERROR: C:/users/dhmem/***/BUILD:116:14: in _check_license rule //third_party_licenses:                                                                    
Traceback (most recent call last):
        File "C:/users/dhmem/_bazel_dhmem/36t2vbit/external/rules_license/rules/compliance.bzl", line 33, column 24, in _check_license_impl
                write_licenses_info(ctx, ctx.attr.deps, licenses_file)
        File "C:/users/dhmem/_bazel_dhmem/36t2vbit/external/rules_license/rules/gather_licenses_info.bzl", line 144, column 50, in write_licenses_info
                licenses.extend(licenses_info_to_json(dep[TransitiveLicensesInfo]))
        File "C:/users/dhmem/_bazel_dhmem/36t2vbit/external/rules_license/rules/gather_licenses_info.bzl", line 245, column 58, in licenses_info_to_json
                top_level_target = _strip_null_repo(licenses_info.target_under_license),
Error: 'TransitiveLicensesInfo' value has no field or method 'target_under_license'
Available attributes: deps, licenses, traces
ERROR: C:/users/dhmem/***/BUILD:116:14: Analysis of target '//third_party_licenses' failed                                                                
ERROR: Analysis of target '//third_party_licenses' failed; build aborted:                                                                                                           
INFO: Elapsed time: 0.696s                                                                                                                                                               
INFO: 0 processes.                                                                                                                                                                       
FAILED: Build did NOT complete successfully (1 packages loaded, 0 targets configured)

Caused by an empty TransitiveLicensesInfo:

DEBUG: C:/users/dhmem/_bazel_dhmem/36t2vbit/external/rules_license/rules/gather_licenses_info.bzl:243:10: licenses_info.target_under_license:  struct(deps = depset([]), licenses = depset([]), traces = [])

And the empty TransitiveLicensesInfo is from

rules_license/rules/licenses_core.bzl

Line 157 in d7eaaa6

 return [provider_factory(deps = depset(), licenses = depset(), traces = [])] 

Specifications

• Version: 0.0.4
• Platform: Windows