in a workspace local package A cannot depend on local package B as a build-system requirement #7147
Description
This is the same issue as on astral-sh/rye#813 but I'm reproducing it here using uv's new workspace features to replace rye with uv.
Repro Structure
pyproject.toml
[project]
name = "my-workspace"
version = "0.0.0"
dependencies = [
"my-app",
]
[tool.uv]
package = false
[tool.uv.sources]
my-app = { workspace = true }
my-setuptools-extension = { workspace = true }
[tool.uv.workspace]
members = [
"src/my-setuptools-extension",
"src/my-app",
]src/my-setuptools-extension/pyproject.toml
[build-system]
requires = [
"setuptools",
"wheel",
]
build-backend = "setuptools.build_meta"
[project]
name = "my-setuptools-extension"
version = "0.0.0"
dependencies = [
"setuptools",
]
[project.entry-points."distutils.commands"]
build_webassets = "my_setuptools_ext:BuildWebAssetsCommand"
[tool.setuptools]
py-modules = ["my_setuptools_ext"]src/my-setuptools-extension/my_setuptools_ext.py
from setuptools import Command
class BuildWebAssetsCommand(Command):
def initialize_options(self):
pass
def finalize_options(self):
pass
def run(self):
print('running!!!')src/my-app/pyproject.toml
[build-system]
requires = [
"setuptools",
"wheel",
"my-setuptools-extension",
]
build-backend = "setuptools.build_meta"
[project]
name = "my-app"
version = "0.0.0"src/my-app/setup.py
This step is optional but here for completeness to prove you can use the extension.
import setuptools # noqa: F401 isort:skip must import before distutils
from distutils.command.build import build as _BuildCommand
from setuptools import setup
from setuptools.command.develop import develop as _DevelopCommand
from setuptools.command.sdist import sdist as _SDistCommand
class SDistCommand(_SDistCommand):
sub_commands = [('build_webassets', None)] + _SDistCommand.sub_commands
class BuildCommand(_BuildCommand):
sub_commands = [('build_webassets', None)] + _DevelopCommand.sub_commands
class DevelopCommand(_DevelopCommand):
def run(self):
self.run_command('build_webassets')
_DevelopCommand.run(self)
setup(
cmdclass={
'sdist': SDistCommand,
'develop': DevelopCommand,
'build': BuildCommand,
}
)Expected Result
No errors, build the packages and allow my-app to be installed.
Actual Result
❯ uv sync
warning: No `requires-python` value found in the workspace. Defaulting to `>=3.9`.
warning: Missing version constraint (e.g., a lower bound) for `setuptools`
Resolved 4 packages in 2ms
error: Failed to prepare distributions
Caused by: Failed to fetch wheel: my-app @ file:///Users/michael.merickel/scratch/uv-test/src/my-app
Caused by: Failed to install requirements from `build-system.requires` (resolve)
Caused by: No solution found when resolving: setuptools, wheel, my-setuptools-extension
Caused by: Because my-setuptools-extension was not found in the package registry and you require my-setuptools-extension, we can conclude that your requirements are unsatisfiable.
uv is failing to find my-setuptools-extension which is defined in the workspace. This is only an issue when it's a build requirement.
Version Info
uv 0.4.6 (Homebrew 2024-09-05)
macos 14.6.1 (m1 max)
Additional Info
In our current repo, we do this by running a specific build step on build-requirement packages into a wheelhouse and then install all of the other packages with a find-links to the wheelhouse.
$ env/bin/pip wheel -w wheels src/my-setuptools-extension
$ env/bin/pip install --find-links wheels -e src/my-app