py_wheel strips dist-info filenames

[alexeagle]

Reproduce by changing our examples/wheel example, adding a strip_path_prefixes that removes the same prefix as the name of the distribution:

py_wheel(
    name = "minimal_with_py_library",
    # Package data. We're building "example_minimal_library-0.0.1-py3-none-any.whl"
    distribution = "examples",
    entry_points = {'console_scripts': ["main = examples.wheel.main:main"]},
    strip_path_prefixes = ["examples"],
    python_tag = "py3",
    version = "0.0.1",
    deps = [
        "//examples/wheel/lib:module_with_data",
        "//examples/wheel/lib:simple_module",
    ],
)

Now due to https://github.com/bazelbuild/rules_python/blob/main/tools/wheelmaker.py#L137 we strip the "examples" off one of the dist-info files:

$ bazel build examples/wheel:minimal_with_py_library
Target //examples/wheel:minimal_with_py_library up-to-date:
  bazel-bin/examples/wheel/examples-0.0.1-py3-none-any.whl

$ less bazel-bin/examples/wheel/examples-0.0.1-py3-none-any.whl
Metadata-Version: 2.1
Name: examples
Version: 0.0.1

Archive:  bazel-bin/examples/wheel/examples-0.0.1-py3-none-any.whl
 Length   Method    Size  Cmpr    Date    Time   CRC-32   Name
--------  ------  ------- ---- ---------- ----- --------  ----
     637  Defl:N      402  37% 2022-03-20 10:07 7eaa34f2  wheel/lib/module_with_data.py
     637  Defl:N      403  37% 2022-03-20 10:07 7f0bd522  wheel/lib/simple_module.py
      91  Defl:N       86   6% 2022-04-04 13:07 4f1122ec  examples-0.0.1.dist-info/WHEEL
      61  Defl:N       54  12% 2022-04-04 13:07 b6a3ded8  examples-0.0.1.dist-info/METADATA
      49  Defl:N       46   6% 2022-04-04 13:07 d178372b  -0.0.1.dist-info/entry_points.txt
     464  Defl:N      316  32% 2022-04-04 13:07 d09a1a14  examples-0.0.1.dist-info/RECORD
--------          -------  ---                            -------
    1939             1307  33%                            6 files

The -0.0.1.dist-info/entry_points.txt file inside the wheel has a bad path name.

[alexeagle]

As a workaround, looks like you can add a trailing slash on the strip_path_prefixes entry, this makes it no longer match the dist-info file but still re-roots files in the repo.

[pstradomski]

Looks straightforward to fix.