feat(python): switch Python spec from poetry to uv

README.md

@@ -23,18 +23,19 @@ the REPS definition.
 
 The `reps-new` tool can be used to bootstrap new projects that conform to this
 standard. It is recommended to install and run it with
-[pipx](https://github.com/pypa/pipx) (so the most up to date version is always
-used):
+[uvx](https://docs.astral.sh/uv/guides/tools/) (so the most up to date version
+is always used). First [install
+uv](https://docs.astral.sh/uv/getting-started/installation/), then run:
 
 ```bash
-pipx run reps-new
+uvx reps-new
 ```
 
 and fill out the prompts. By default, the `python` project template is used.
 You may optionally specify a different template to use with the `-t/--template` flag:
 
 ```bash
-pipx run reps-new -t base
+uvx reps-new -t base
 ```
 
 Available templates can be found in the

STANDARD.md

@@ -281,11 +281,11 @@ standards.
 
 ### Packaging
 
-Projects should use [Poetry] to manage dependencies, run builds and publish
-packages. Running `poetry init` should be sufficient to generate the initial
+Projects should use [uv] to manage dependencies, virtualenvs and publish
+packages. Running `uv init` should be sufficient to generate the initial
 configuration in the top-level `pyproject.toml` file.
 
-[Poetry]: https://python-poetry.org/
+[uv]: https://docs.astral.sh/uv/
 
 ### Testing
 
@@ -467,15 +467,14 @@ type-check:
         cwd: '{checkout}'
         cache-dotcache: true
         command: >-
-            poetry install --only main --only type &&
-            poetry run pyright
+            uv run pyright
 ```
 
 While it's possible to run as a [pre-commit hook], this method isn't
 recommended as Pyright needs to run in an environment where the project's
 dependencies are installed. This means either the dependencies need to be
 listed a second time in `pre-commit-config.yaml`, or Pyright needs to be
-explicitly told about Poetry's virtualenv (which varies from person to person
+explicitly told about uv's virtualenv (which varies from person to person
 and shouldn't be committed in the config file).
 
 [Pyright]: https://github.com/Microsoft/pyright

reps/hooks.py

@@ -86,38 +86,45 @@ def merge_pre_commit(items: CookiecutterContext):
 
 
 @hook("post-gen-py")
-def add_poetry_dependencies(items: CookiecutterContext):
+def add_uv_dependencies(items: CookiecutterContext):
     # Build constraints to ensure we don't try to add versions
     # that are incompatible with the minimum Python.
     min_python = items["min_python_version"]
     constraints = defaultdict(dict)
-    constraints["coverage"] = {"3.7": "coverage@<7.3.0"}
-    constraints["tox"] = {"3.7": "tox@<4.9.0"}
+    constraints["coverage"] = {"3.7": "coverage<7.3.0"}
+    constraints["tox"] = {"3.7": "tox<4.9.0"}
     constraints["sphinx-book-theme"] = {
-        "3.7": "sphinx-book-theme@<=1.0.1",
-        "3.8": "sphinx-book-theme@<=1.0.1",
+        "3.7": "sphinx-book-theme<=1.0.1",
+        "3.8": "sphinx-book-theme<=1.0.1",
     }
     constraints["sphinx-autobuild"] = {
-        "3.7": "sphinx-autobuild@<=2021.3.14",
-        "3.8": "sphinx-autobuild@<=2021.3.14",
+        "3.7": "sphinx-autobuild<=2021.3.14",
+        "3.8": "sphinx-autobuild<=2021.3.14",
     }
 
     def build_specifiers(*packages: str) -> Generator[str, None, None]:
         for p in packages:
             yield constraints[p].get(min_python, p)
 
     run(
-        ["poetry", "add", "--group=test"]
+        # Until the pyproject.toml spec and/or uv supports dependency groups, we
+        # need to add these all to "dev-dependencies"
+        # See: https://github.com/astral-sh/uv/issues/5632
+        ["uv", "add", "--dev"]
         + list(
-            build_specifiers("coverage", "pytest", "pytest-mock", "responses", "tox")
+            build_specifiers(
+                "coverage",
+                "pyright",
+                "pytest",
+                "pytest-mock",
+                "responses",
+                "sphinx<7",
+                "sphinx-autobuild",
+                "sphinx-book-theme",
+                "tox",
+            )
         )
     )
-    run(
-        ["poetry", "add", "--group=docs"]
-        + list(build_specifiers("sphinx<7", "sphinx-autobuild", "sphinx-book-theme"))
-    )
-
-    run(["poetry", "add", "--group=type"] + list(build_specifiers("pyright")))
 
 
 @hook("post-gen-py")

reps/templates/python/cookiecutter.json

@@ -3,7 +3,8 @@
     "__project_slug": "{{cookiecutter.project_name|lower|replace(' ', '-')}}",
     "__package_name": "{{cookiecutter.project_name|lower|replace(' ', '_')|replace('-', '_')}}",
     "short_description": "",
-    "author": "Mozilla Release Engineering <[email protected]>",
+    "author_name": "Mozilla Release Engineering",
+    "author_email": "[email protected]",
     "github_slug": "mozilla-releng/{{cookiecutter.__project_slug}}",
     "__github_org": "{{cookiecutter.github_slug[:cookiecutter.github_slug.find('/')]}}",
     "__github_project": "{{cookiecutter.github_slug[cookiecutter.github_slug.find('/')+1:]}}",

reps/templates/python/{{cookiecutter.__project_slug}}/pyproject.toml

@@ -1,14 +1,16 @@
-[tool.poetry]
+[project]
 name = "{{cookiecutter.__project_slug}}"
 version = "0.1.0"
 description = "{{cookiecutter.short_description}}"
-authors = ["{{cookiecutter.author}}"]
-license = "MPL-2.0"
+requires-python = ">={{cookiecutter.min_python_version}}"
+authors = [
+  { name = "{{cookiecutter.author_name}}", email = "{{cookiecutter.author_email}}" }
+]
+classifiers = [
+  "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
+]
 readme = "README.md"
 
-[tool.poetry.dependencies]
-python = "^{{cookiecutter.min_python_version}}"
-
 [tool.pytest.ini_options]
 xfail_strict = true
 
@@ -42,5 +44,5 @@ include = ["src/{{cookiecutter.__package_name}}"]
 reportUnknownParameterType = "error"
 
 [build-system]
-requires = ["poetry-core"]
-build-backend = "poetry.core.masonry.api"
+requires = ["hatchling"]
+build-backend = "hatchling.build"

reps/templates/python/{{cookiecutter.__project_slug}}/taskcluster/docker/python/Dockerfile

@@ -22,17 +22,10 @@ ENV SHELL=/bin/bash \
 VOLUME /builds/worker/checkouts
 VOLUME /builds/worker/.cache
 
-# pyenv
-# %ARG PYENV_VERSIONS
-ENV PYENV_ROOT=/builds/worker/.pyenv \
-    PATH=/builds/worker/.pyenv/bin:/builds/worker/.pyenv/shims:$PATH
-# %include taskcluster/scripts/pyenv-setup
-ADD topsrcdir/taskcluster/scripts/pyenv-setup /builds/worker/pyenv-setup
-RUN /builds/worker/pyenv-setup "$PYENV_VERSIONS"
-
-# %include taskcluster/scripts/poetry-setup
-ADD topsrcdir/taskcluster/scripts/poetry-setup /builds/worker/poetry-setup
-RUN /builds/worker/poetry-setup
+# uv
+COPY --from=ghcr.io/astral-sh/uv:0.3.5 /uv /bin/uv
+# %ARG PYTHON_VERSIONS
+RUN uv python install $PYTHON_VERSIONS
 
 RUN chown -R worker:worker /builds/worker
 

reps/templates/python/{{cookiecutter.__project_slug}}/taskcluster/kinds/codecov/kind.yml

@@ -35,5 +35,4 @@ tasks:
             using: run-task
             cwd: '{checkout}'
             command: >-
-                poetry install --only test &&
-                poetry run python taskcluster/scripts/codecov-upload.py
+                uv run python taskcluster/scripts/codecov-upload.py

reps/templates/python/{{cookiecutter.__project_slug}}/taskcluster/kinds/docker-image/kind.yml

@@ -1,7 +1,7 @@
 {%- set pylist -%}
 {%- for i in range(cookiecutter.__max_tox_python_version[1:]|int, cookiecutter.__min_tox_python_version[1:]|int - 1, -1) -%}
 3.{{i}}
-{%- if not loop.last %},{% endif -%}
+{%- if not loop.last %} {% endif -%}
 {%- endfor -%}
 {%- endset -%}
 ---
@@ -16,4 +16,4 @@ tasks:
     fetch: {}
     python:
         args:
-            PYENV_VERSIONS: "{{pylist}}"
+            PYTHON_VERSIONS: "{{pylist}}"

reps/templates/python/{{cookiecutter.__project_slug}}/taskcluster/kinds/test/kind.yml

@@ -32,14 +32,12 @@ tasks:
                 TOX_PARALLEL_NO_SPINNER: "1"
         run:
             command: >-
-                poetry install --only test &&
-                poetry run tox --parallel
+                uv run tox --parallel
 
     type-check:
         description: "Run pyright type checking against code base"
         worker:
             max-run-time: 300
         run:
             command: >-
-                poetry install --only main --only type &&
-                poetry run pyright
+                uv run pyright

reps/templates/python/{{cookiecutter.__project_slug}}/tox.ini

@@ -10,27 +10,24 @@
 envlist = clean,{{pylist}},report
 
 [testenv]
-allowlist_externals = poetry
+allowlist_externals = uv
 parallel_show_output = true
 depends =
     {{pylist}}: clean
     report: {{pylist}}
 commands =
-    poetry install --with test
-    poetry run python --version
-    poetry run coverage run --context={envname} -p -m pytest -vv {posargs}
+    uv run python --version
+    uv run coverage run --context={envname} -p -m pytest -vv {posargs}
 
 [testenv:report]
-allowlist_externals = poetry
+allowlist_externals = uv
 passenv = COVERAGE_REPORT_COMMAND
 parallel_show_output = true
 commands =
-    poetry install --only test
-    poetry run coverage combine
-    poetry run {env:COVERAGE_REPORT_COMMAND:coverage report}
+    uv run coverage combine
+    uv run {env:COVERAGE_REPORT_COMMAND:coverage report}
 
 [testenv:clean]
-allowlist_externals = poetry
+allowlist_externals = uv
 commands =
-    poetry install --only test
-    poetry run coverage erase
+    uv run coverage erase

test/test_template_python.py

@@ -26,7 +26,6 @@ def test_generated_files(reps_new):
         "docs/reference/index.rst",
         "docs/tutorials/index.rst",
         "pyproject.toml",
-        "poetry.lock",
         f"src/{name}/__init__.py",
         "taskcluster/config.yml",
         "taskcluster/docker/fetch/Dockerfile",
@@ -36,17 +35,16 @@ def test_generated_files(reps_new):
         "taskcluster/kinds/fetch/kind.yml",
         "taskcluster/kinds/test/kind.yml",
         "taskcluster/scripts/codecov-upload.py",
-        "taskcluster/scripts/pyenv-setup",
-        "taskcluster/scripts/poetry-setup",
         "test/conftest.py",
         f"test/test_{name}.py",
         "tox.ini",
+        "uv.lock",
     ]
 
     project = reps_new(name, "python")
 
     actual = []
-    ignore = ("__pycache__", ".git/", ".pyc")
+    ignore = ("__pycache__", ".git/", ".pyc", ".venv")
     for path in project.rglob("*"):
         if path.is_dir() or any(i in str(path) for i in ignore):
             continue
@@ -64,7 +62,8 @@ def test_generated_files(reps_new):
                 "__project_slug": "my-package",
                 "__package_name": "my_package",
                 "short_description": "",
-                "author": "Mozilla Release Engineering <[email protected]>",
+                "author_name": "Mozilla Release Engineering",
+                "author_email": "[email protected]",
                 "github_slug": "mozilla-releng/my-package",
                 "min_python_version": "3.8",
                 "__min_tox_python_version": "38",