Resolve normalised vs original distribution names #97
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component: sources
Related to WheelSource and friends
type: task
Something that needs to be done that is not a bug or feature
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pradyunsg
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mattoberle
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Jun 7, 2022
`pypa/installer` is used to parse Wheel metadata, but does not currently provide a method for normalizing distribution names: - pypa/installer#97 `pypa/pkg_resources` provides `Requirement.parse` which returns an instance of `Requirement` where `.key` is the canonical distribution name per PEP 503. The `Requirement` class can also parse `extras`, but it returns a normalized form that I believe could break the installation of the extras.
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alexeagle
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Jun 21, 2022
* Use PEP 426 rules when setting deps from extras This commit addresses issue #720. [PEP 426](https://peps.python.org/pep-0426/#name) states that distribution names are case-insensitive and "-" is interchangeable with "_". The `pip-compile` command creates a lockfile where all package names are lowercase. The tool may also modify interchangeable characters. The following examples are all valid `requirements.txt` or `requirements_lock.txt` entries: ``` SQLAlchemy[postgresql_psycopg2binary]==1.4.36 sqlalchemy[postgresql_psycopg2binary]==1.4.36 sentry_sdk[flask]==1.5.8 sentry-sdk[flask]==1.5.8 ``` A distribution's `METADATA` file contains the stylization chosen by the publisher. By applying a "sanitise" function when building the `extras` dict and when performing lookups we can eliminate this difference as a concern. * Use PEP 503 rules when sanitising extras * Normalize distribution name with pkg_resources `pypa/installer` is used to parse Wheel metadata, but does not currently provide a method for normalizing distribution names: - pypa/installer#97 `pypa/pkg_resources` provides `Requirement.parse` which returns an instance of `Requirement` where `.key` is the canonical distribution name per PEP 503. The `Requirement` class can also parse `extras`, but it returns a normalized form that I believe could break the installation of the extras. * Use Requirement.parse to populate extra reqs * Revert "Use Requirement.parse to populate extra reqs" This reverts commit f0faa97. * Test for distribution name normalization in extras * Replace pkg_resources with packaging.utils This replaces `pkg_resources.Requirement.parse` with `packaging.utils.canonicalize_name`. Doing this pulls in a vendored requirement from `pip`, which may be undesirable. The code we want is just: ``` re.sub(r"[-_.]+", "-", name).lower() ``` This commit also leaves a reference to `pkg_resources` in `wheel.py` which does not canonicalize the name. Co-authored-by: Jonathon Belotti <[email protected]> Co-authored-by: Alex Eagle <[email protected]>
mattem
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Jul 7, 2022
* Use PEP 426 rules when setting deps from extras This commit addresses issue bazelbuild#720. [PEP 426](https://peps.python.org/pep-0426/#name) states that distribution names are case-insensitive and "-" is interchangeable with "_". The `pip-compile` command creates a lockfile where all package names are lowercase. The tool may also modify interchangeable characters. The following examples are all valid `requirements.txt` or `requirements_lock.txt` entries: ``` SQLAlchemy[postgresql_psycopg2binary]==1.4.36 sqlalchemy[postgresql_psycopg2binary]==1.4.36 sentry_sdk[flask]==1.5.8 sentry-sdk[flask]==1.5.8 ``` A distribution's `METADATA` file contains the stylization chosen by the publisher. By applying a "sanitise" function when building the `extras` dict and when performing lookups we can eliminate this difference as a concern. * Use PEP 503 rules when sanitising extras * Normalize distribution name with pkg_resources `pypa/installer` is used to parse Wheel metadata, but does not currently provide a method for normalizing distribution names: - pypa/installer#97 `pypa/pkg_resources` provides `Requirement.parse` which returns an instance of `Requirement` where `.key` is the canonical distribution name per PEP 503. The `Requirement` class can also parse `extras`, but it returns a normalized form that I believe could break the installation of the extras. * Use Requirement.parse to populate extra reqs * Revert "Use Requirement.parse to populate extra reqs" This reverts commit f0faa97. * Test for distribution name normalization in extras * Replace pkg_resources with packaging.utils This replaces `pkg_resources.Requirement.parse` with `packaging.utils.canonicalize_name`. Doing this pulls in a vendored requirement from `pip`, which may be undesirable. The code we want is just: ``` re.sub(r"[-_.]+", "-", name).lower() ``` This commit also leaves a reference to `pkg_resources` in `wheel.py` which does not canonicalize the name. Co-authored-by: Jonathon Belotti <[email protected]> Co-authored-by: Alex Eagle <[email protected]>
stefanor
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Aug 15, 2022
Allowing us to unpack wheels with non-normalized filenames. Part of pypa#97, but doesn't retrieve the names from distribution metadata, yet.
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At present, the distribution name comes from the wheel filename, which can be normalised according to the new rule (PEP 503 normalisation, but with
_in place of-) or according to an older rule (any character exceptA-Za-z0-9.is converted to_).If we want the original distribution name for anything, we should get that from wheel metadata. If we want the normalised name, we should normalise it ourselves for consistency.
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