`experimental_target_platforms` produces `whl` with duplicated dependencies

[wingsofovnia]

🐞 bug report

Affected Rule

The issue is caused by the rule:

pip.parse

Is this a regression?

Can't test. The reproduction doesn't build on older versions due to #1810

Description

When experimental_target_platforms is used, some whl targets generated have duplicated dependencies, e.g.:

filegroup(
    name = "whl",
    srcs = ["opencv_python-4.8.1.78-cp37-abi3-macosx_11_0_arm64.whl"],
    data = ["@pip//numpy:whl"] + select(
        {
            "@@platforms//os:osx": ["@pip//numpy:whl"],
            "//conditions:default": [],
        },
    ),
    visibility = ["//visibility:public"],
)

🔬 Minimal Reproduction

https://github.com/wingsofovnia/rules_python-issues-1873

Lock files generated via bazel run //:requirements_lock.update:

• requirements.txt.darwin_aarch64.lock generated on Mac M1
• requirements.txt.linux_x86_32.lock generated in docker run --platform linux/amd64 container

🔥 Exception or Error

ERROR: /private/var/tmp/.../rules_python~~pip~pip_310_opencv_python/BUILD.bazel:16:10: 
   in data attribute of filegroup rule @@rules_python~~pip~pip_310_opencv_python//:whl: 
      Label '@@rules_python~~pip~pip//numpy:whl' is duplicated

🌍 Your Environment

Operating System:

> uname -a # requirements.txt.darwin_aarch64.lock
Darwin CDDEBERMC005031 23.4.0 Darwin Kernel Version 23.4.0: Fri Mar 15 00:10:42 PDT 2024; root:xnu-10063.101.17~1/RELEASE_ARM64_T6000 arm64
> uname -a # requirements.txt.linux_x86_32.lock
Linux f74bbe09936a 6.6.22-linuxkit #1 SMP Fri Mar 29 12:21:27 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Output of bazel version:

bazel version
Bazelisk version: v1.19.0
Build label: 7.1.1
Build target: @@//src/main/java/com/google/devtools/build/lib/bazel:BazelServer
Build time: Thu Mar 21 18:08:37 2024 (1711044517)
Build timestamp: 1711044517
Build timestamp as int: 1711044517

Rules_python version:

HEAD (d3cec48e415dd598a773335532cbc5647c985a93)