# Developer documentation¶

Documentation for developers/contributors of the project.

## Project decisions¶

python.distutils plugin generates setup(dependency_links=...) from project.depends_on(url=...). dependency_links is deprecated and we do not want urls to show up in setup.py, so we opt to add 2 properties *_urls instead of using depends_on(url=...).

No error is raised when plugin and build requirements conflict. No public function exists to check whether the intersection of 2 specifier sets is empty. Implementing such a function would take much effort judging by the length of the specification of version specifiers, while the issue isn’t too hard for a human to figure out when pip-sync inevitably fails to find a matching version.