Wheel maker
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fromager
Fromager is a tool for completely re-building a dependency tree of Python wheels from source.
The goals are to support guaranteeing
- The binary package someone is installing was built from source in a known build environment compatible with their own environment
- All of the package’s dependencies were also built from source -- any binary package installed will have been built from source
- All of the build tools used to build these binary packages will also have been built from source
- The build can be customized for the packager's needs, including patching out bugs, passing different compilation options to support build "variants", etc.
The basic design tenet is to automate everything with a default behavior that works for most PEP-517 compatible packages, but support overriding all of the actions for special cases, without encoding those special cases directly into fromager.
Using private registries
Fromager uses the requests library and pip
at different points for talking to package registries. Both support
authenticating to remote servers in various ways. The simplest way to integrate
the authentication with fromager is to have a
netrc file with a valid entry
for the host. The file will be read from ~/.netrc by default. Another location
can be specified by setting the NETRC environment variable.
For example, to use a gitlab package registry, use a personal access token as documented in this issue:
machine gitlab.com login oauth2 password $token
Determining versions via GitHub tags
In some cases, the builder might have to use tags on GitHub to determine the version of a project instead of looking at pypi.org. To avoid rate limit or to access private GitHub repository, a personal access token can be passed to fromager by setting the following environment variable:
GITHUB_TOKEN=<access_token>
Additional docs
What's with the name?
Python's name comes from Monty Python, the group of comedians. One of their skits is about a cheese shop that has no cheese in stock. The original Python Package Index (pypi.org) was called The Cheeseshop, in part because it hosted metadata about packages but no actual packages. The wheel file format was selected because cheese is packaged in wheels. And "fromager" is the French word for someone who makes or sells cheese.
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