Support Uv as a Python build-system (#285)

* Support Uv as a Python build-system

* fix: Fix `inject_url_credentials()` to not drop port

* fix invokation of pyproject-build

* add examples for Uv project for integration tests

.changelog/_unreleased.toml

@@ -3,3 +3,21 @@ id = "e3dd07f8-7520-45b9-9407-9f650e4d333c"
 type = "feature"
 description = "Extend pytest task to accept a sequence of paths that contain test files."
 author = "@sebimarkgraf"
+
+[[entries]]
+id = "eca4a4bb-fef4-4692-8799-402d874a5807"
+type = "feature"
+description = "Add Python build-system support for Uv (https://docs.astral.sh/uv/guides/projects/)"
+author = "@NiklasRosenstein"
+
+[[entries]]
+id = "2d36cc17-ab77-476d-9187-9f509e51735d"
+type = "fix"
+description = "Use `fsdecode()` on result from `find_uv_bin()` for enhanced compatbility"
+author = "@NiklasRosenstein"
+
+[[entries]]
+id = "6262db32-1e87-471b-b4fb-b99ef55eea56"
+type = "fix"
+description = "Fix `inject_url_credentials()` to not drop port"
+author = "@NiklasRosenstein"

examples/uv-project-consumer/.kraken.py

@@ -0,0 +1,16 @@
+import os
+
+from kraken.std import python
+
+python.python_settings(always_use_managed_env=True).add_package_index(
+    alias="local",
+    index_url=os.environ["LOCAL_PACKAGE_INDEX"],
+    credentials=(os.environ["LOCAL_USER"], os.environ["LOCAL_PASSWORD"]),
+)
+python.install()
+python.mypy(version_spec="==1.10.0")
+python.flake8(version_spec="==7.0.0")
+python.black(version_spec="==24.4.2")
+python.isort(version_spec="==5.13.2")
+python.pytest()
+python.publish(package_index="local", distributions=python.build(as_version="0.1.0").output_files)

examples/uv-project-consumer/pyproject.toml

@@ -0,0 +1,13 @@
+[project]
+name = "uv-project-consumer"
+version = "0.1.0"
+description = "Add your description here"
+requires-python = ">=3.10"
+dependencies = [
+    "tqdm>=4.66.5",
+    "uv-project==0.1.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"

examples/uv-project-consumer/src/uv_project_consumer/__init__.py

@@ -0,0 +1,5 @@
+from uv_project import hello
+
+
+def main() -> None:
+    hello()

examples/uv-project/.kraken.py

@@ -0,0 +1,16 @@
+import os
+
+from kraken.std import python
+
+python.python_settings(always_use_managed_env=True).add_package_index(
+    alias="local",
+    index_url=os.environ["LOCAL_PACKAGE_INDEX"],
+    credentials=(os.environ["LOCAL_USER"], os.environ["LOCAL_PASSWORD"]),
+)
+python.install()
+python.mypy(version_spec="==1.10.0")
+python.flake8(version_spec="==7.0.0")
+python.black(version_spec="==24.4.2")
+python.isort(version_spec="==5.13.2")
+python.pytest()
+python.publish(package_index="local", distributions=python.build(as_version="0.1.0").output_files)

examples/uv-project/pyproject.toml

@@ -0,0 +1,17 @@
+[project]
+name = "uv-project"
+version = "0.1.0"
+description = "Add your description here"
+requires-python = ">=3.10"
+dependencies = [
+    "tqdm>=4.66.5",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.uv]
+dev-dependencies = [
+    "types-tqdm>=4.66.0.20240417",
+]

examples/uv-project/src/uv_project/__init__.py

@@ -0,0 +1,9 @@
+from time import sleep
+
+from tqdm import tqdm
+
+
+def hello() -> None:
+    for _ in tqdm(range(10)):
+        print("Hello from uv-project!")
+        sleep(1)

kraken-build/src/kraken/std/python/buildsystem/__init__.py

@@ -184,4 +184,12 @@ def detect_build_system(project_directory: Path) -> PythonBuildSystem | None:
 
         return PDMPythonBuildSystem(project_directory)
 
-    return None
+    if "[tool.uv]" not in pyproject_content:
+        logger.info(
+            "Got no hint as to the Python build system used in the project '%s', falling back to UV (experimental)",
+            project_directory,
+        )
+
+    from kraken.std.python.buildsystem.uv import UVPythonBuildSystem
+
+    return UVPythonBuildSystem(project_directory)

kraken-build/src/kraken/std/python/buildsystem/pdm.py

@@ -33,9 +33,6 @@ class PdmPyprojectHandler(PyprojectHandler):
     Implements the PyprojectHandler interface for PDM projects.
     """
 
-    def __init__(self, pyproj: TomlFile) -> None:
-        super().__init__(pyproj)
-
     # PyprojectHandler
 
     def get_package_indexes(self) -> list[PackageIndex]:

kraken-build/src/kraken/std/python/buildsystem/slap.py

@@ -72,6 +72,7 @@ def bump_version(self, version: str) -> Iterator[None]:
     def build(self, output_directory: Path) -> list[Path]:
         with tempfile.TemporaryDirectory() as tempdir:
             command = ["slap", "publish", "--dry", "-b", tempdir]
+            logger.info("Running %s in '%s'", command, self.project_directory)
             sp.check_call(command, cwd=self.project_directory)
             src_files = list(Path(tempdir).iterdir())
             dst_files = [output_directory / path.name for path in src_files]