make-fake-ruff-wheel

#!/usr/bin/python3
"""
Make ruff installable on Android phones (via Termux) that don't have enough RAM to compile large Rust programs.
(8 GB of RAM is *not* enough!)

Usage:
  pkg install ruff python uv
  mkdir ~/wheels
  cd ~/wheels
  python /path/to/make-fake-ruff-wheel
  export UV_FIND_LINKS=~/wheels
  
now whenever you try to install ruff via uv (e.g. when using tox-uv), it should pick up the .whl file in ~/wheels/.

CAVEAT: currently the version number, the binary size, and the SHA-256 checksum of the ruff binary are hardcoded.
This script will break when a newer version of ruff shows up in Termux repositories.
"""
import sysconfig
import textwrap
import zipfile


class FakeWheelMaker:
    name = 'ruff'
    version = '0.16.2'
    platform_tag = sysconfig.get_platform().replace('-', '_').replace('.', '_')
    generator = 'make-fake-ruff-wheel (0.0.1)'

    ruff_binary = '/data/data/com.termux/files/usr/bin/ruff'
    ruff_binary_sha256 = '596f65e227d102031577f8b1c3699dfa69c9d0b2021351cac075a27cd1c56f07'
    ruff_binary_size = 23941808

    def __init__(self):
        self.tag = f'py3-none-{self.platform_tag}'
        self.filename = f'{self.name}-{self.version}-{self.tag}.whl'

    def make(self):
        with zipfile.ZipFile(self.filename, 'w') as self.zf:
            self.add_files()

    def add_file(self, filename, filesystem_source=None, content=None):
        if filesystem_source:
            self.zf.write(filesystem_source, filename)
        elif content:
            self.zf.writestr(filename, content)

    def add_files(self):
        self.add_file(
            f'{self.name}-{self.version}.data/scripts/ruff',
            filesystem_source=self.ruff_binary
        )
        self.add_file(
            f'{self.name}-{self.version}.dist-info/METADATA',
            content=textwrap.dedent(f'''
                Metadata-Version: 2.4
                Name: {self.name}
                Version: {self.version}
                Home-Page: https://docs.astral.sh/ruff
                License-Expression: MIT

                '''.lstrip('\n')
            ),
        )
        self.add_file(
            f'{self.name}-{self.version}.dist-info/WHEEL',
            content=textwrap.dedent(f'''
                Wheel-Version: 1.0
                Generator: {self.generator}
                Root-Is-Purelib: false
                Tag: {self.tag}
                '''.lstrip('\n')
            ),
        )
        self.add_file(
            f'{self.name}-{self.version}.dist-info/RECORD',
            content=textwrap.dedent(f'''
                {self.name}-{self.version}.data/scripts/ruff,sha256={self.ruff_binary_sha256},{self.ruff_binary_size}
                {self.name}-{self.version}.dist-info/METADATA,,
                {self.name}-{self.version}.dist-info/WHEEL,,
                {self.name}-{self.version}.dist-info/RECORD,,
                '''.lstrip('\n')
            ),
        )


def main():
    maker = FakeWheelMaker()
    maker.make()
    print(f"Created {maker.filename}")


if __name__ == "__main__":
    main()