humpty 0.2.1

A tool to convert python wheels to eggs

For when you need an .egg but all you have is a .whl.

Description

Humpty is a command-line utility to convert Python binary wheel packages to eggs.

Currently, the tool is in a “works for me” state. (It is not guaranteed to work for you.)

Development takes place on github. The package is installable from PyPI

Obsolescence

Note that recent developments may have made this utility unnecessary. As of setuptools 38.2.0, easy_install support installing wheels as unzipped eggs. Also, zc.buildout, as of 2.10.0 takes advantage of this to support installation from wheels.

Synopsis

The humpty “man page”:

$ humpty --help
Usage: humpty [OPTIONS] WHEELS...

  Convert wheels to eggs.

Options:
  -d, --dist-dir DIR  Build eggs into <dir>.  Default is <cwd>/dist.
  --help              Show this message and exit.

Suppose you need an egg of a distribution which has only been uploaded to PyPI as a wheel:

$ pip install --download . publicsuffixlist
[...]
  Saved ./publicsuffixlist-0.2.8-py2.py3-none-any.whl
Successfully downloaded publicsuffixlist

$ humpty -dist-dir . publicsuffixlist-0.2.8-py2.py3-none-any.whl
Converting publicsuffixlist-0.2.8-py2.py3-none-any.whl to publicsuffixlist-0.2.8-py2.6.egg

$ easy_install publicsuffixlist-0.2.8-py2.7.egg

References

• PEP 427 - The Wheel Binary Package Format 1.0

• PEP 491 - The Wheel Binary Package Format 1.9

• PEP 241 - Metadata for Python Software Packages

• PEP 314 - Metadata for Python Software Packages v1.1

• PEP 345 - Metadata for Python Software Packages 1.2

• PEP 426 - Metadata for Python Software Packages 2.0

• PEP 459 - Standard Metadata Extensions for Python Software Packages

• Setuptools: The Internal Structure of Python Eggs

Authors

Jeff Dairiki

History

Release 0.2.1 (2017-12-18)

Compatibility

• Drop support for python 3.3.

Packaging

• Include tests in sdist.

Testing

• Test with wheel version 0.18 (among others.)

• Increase test coverage

Release 0.2 (2017-11-08)

Python 2.6 is no longer supported. We now test under cpython 2.7 and cpython 3.3 through 3.6.

Changed Behavior

• The strict check for wheel binary compatibility with the current platform has been removed. Now a warning is printed in this case. When running under py35 or py36, distlib sometimes falsely reports that some wheels are not binary compatible. See distlib ticket #93.

Bugs Fixed

• Fix EggInfo_Legacy.requires to work with recent versions of distlib. With distlib<=0.2.4, distlib.wheel.Wheel.metadata.run_requires is a list of strings, taken from lines of the RFC822 style metadata. With recent versions of distlib, run_requires is a list of dicts in the “JSON” format described in PEP 426. This addresses #1.

• Always create eggs with zip_safe=False. There currently seems to be no robust way to determine whether a package is zip_safe from its wheel. See #3 for further discussion. (Thank you to immerrr.)

• Fix parsing of markers in EggInfo_Legacy.requires. Apparently, as of distlib==0.2.6, distlib.markers.interpret no longer handles leading whitespace in the marker string well.

• Fix failing test test_humpty:TestScriptCopyer.test_copies_script. Apparently, distlib.markers.interpret==0.2.6 now just prepends the new hashbang line to the copied script, but does not remove the original hashbang.

Release 0.1 (2015-07-16)

Initial release.