pybind_library_test: fix PYTHONHOME setup build_defs.bzl: * Added a new pybind_py_env_test rule. This rule resolves the Python toolchain at analysis time, extracts the runtime path, and generates a shell wrapper script. * The wrapper script dynamically identifies the absolute path to the Python runtime within the Bazel runfiles and sets the PYTHONHOME environment variable before executing the actual C++ test binary. * Updated the pybind_library_test macro to build the C++ code as a private cc_binary and then wrap it with pybind_py_env_test.
Github-CI: | OS \ Build system | Bazel | |:------- | :---: | | Linux (amd64) | 
| | MacOS (amd64) | | | MacOS (arm64) | | | Windows (amd64) | |
Provided rules:
pybind_extension: Builds a python extension, automatically adding the required build flags and pybind11 dependencies. It defines a target which can be included as a data dependency of a py_* target.pybind_library: Builds a C++ library, automatically adding the required build flags and pybind11 dependencies. This library can then be used as a dependency of a pybind_extension. The arguments match a cc_library.pybind_library_test: Builds a C++ test for a pybind_library. The arguments match a cc_test.To test a pybind_extension, the most common approach is to write the test in Python and use the standard py_test build rule.
To embed Python, add @rules_python//python/cc:current_py_cc_libs as a dependency to your cc_binary.
In your WORKSPACE file:
http_archive( name = "pybind11_bazel", strip_prefix = "pybind11_bazel-<version>", urls = ["https://github.com/pybind/pybind11_bazel/archive/v<version>.zip"], ) # We still require the pybind library. http_archive( name = "pybind11", build_file = "@pybind11_bazel//:pybind11-BUILD.bazel", strip_prefix = "pybind11-<version>", urls = ["https://github.com/pybind/pybind11/archive/v<version>.zip"], )
Then, in your BUILD file:
load("@pybind11_bazel//:build_defs.bzl", "pybind_extension")
In your MODULE.bazel file:
bazel_dep(name = "pybind11_bazel", version = "<version>")
Usage in your BUILD file is as described previously.