[build-system]
requires = ["maturin>=0.12,<0.13"]
build-backend = "maturin"

[project]
name = "fusion_blossom"
requires-python = ">=3.7"
classifiers = [
    "Programming Language :: Rust",
    'Programming Language :: Python',
    'Programming Language :: Python :: 3',
    'Programming Language :: Python :: 3 :: Only',
    'Programming Language :: Python :: 3.7',
    'Programming Language :: Python :: 3.8',
    'Programming Language :: Python :: 3.9',
    "Programming Language :: Python :: Implementation :: CPython",
    "Programming Language :: Python :: Implementation :: PyPy",
    'Intended Audience :: Developers',
    'Intended Audience :: Information Technology',
    'Intended Audience :: System Administrators',
    'License :: OSI Approved :: MIT License',
    'Operating System :: Unix',
    'Operating System :: POSIX :: Linux',
    'Environment :: Console',
    'Environment :: MacOS X',
    'Topic :: Software Development :: Libraries :: Python Modules',
    'Topic :: Internet',
]

# by default remove blossom V in the build because of license issue;
# users can enable blossom V by removing `remove_blossom_v` feature, at the responsibility of users
[tool.maturin]
features = ["python_binding", "remove_blossom_v", "dangerous_pointer", "u32_index", "i32_weight"]
# Yue 2022.10.8: when maturin is called from `pip wheel`, it doesn't enable the above features, and thus pyo3 is not enabled
#     since it cannot find pyo3, it falls back to use cffi (which is really confusing because I don't use cffi at all!)
#     in order to solve cffi issue, I append "cffi" after requires = ["maturin>=0.12,<0.13"], and it works and generate some wheels
#     but the problem remains: the wheel actually doesn't contain anything, simply because "python_binding" is not enabled
#     I have to add `bindings = "pyo3"` to explicitly tell maturin to use pyo3, and then it complains that it cannot find pyo3
#     later on I realize I have to provide the features in `cargo-extra-args` (credit to https://github.com/PyO3/maturin/issues/211)
# conclusion: when calling `maturin develop`, it can read `features` above; but when called from `pip wheel`, it takes value below
bindings = "pyo3"
cargo-extra-args = "--features python_binding,remove_blossom_v,dangerous_pointer,u32_index,i32_weight"