Use declarative setuptools (#7629)

.flake8

@@ -0,0 +1,37 @@
+# flake8 doesn't support pyproject.toml yet https://github.com/PyCQA/flake8/issues/234
+[flake8]
+# References:
+# https://flake8.readthedocs.io/en/latest/user/configuration.html
+# https://flake8.readthedocs.io/en/latest/user/error-codes.html
+
+# Note: there cannot be spaces after commas here
+exclude = __init__.py,versioneer.py,distributed/_concurrent_futures_thread.py
+ignore =
+    # Ignores below are aligned with black https://github.com/psf/black/blob/main/.flake8
+    # Whitespace before ':'
+    E203
+    # Too many leading '#' for block comment
+    E266
+    # Line too long, ignored in favor of B950
+    E501
+    # Line break occurred before a binary operator
+    W503
+    # Line too long
+    B950
+    # No explicit stacklevel in warnings.warn. FIXME we should correct this in the code
+    B028
+
+per-file-ignores =
+    **/tests/*:
+        # Module level import not at top of file (to silence on pytest.importorskip)
+        # See https://github.com/PyCQA/pycodestyle/issues/472
+        E402,
+        # Do not use variables named 'I', 'O', or 'l'
+        E741,
+        # Local variable name is assigned to but never used
+        F841,
+        # Do not call assert False since python -O removes these calls
+        B011,
+
+# B950 will only trigger at 88
+max-line-length = 80

.github/workflows/conda.yml

@@ -6,9 +6,9 @@ on:
   pull_request:
     paths:
       - setup.py
-      - requirements.txt
       - continuous_integration/recipes/**
       - .github/workflows/conda.yml
+      - pyproject.toml
 
 # When this workflow is queued, automatically cancel any previous running
 # or pending jobs from the same branch

.github/workflows/tests.yaml

@@ -154,7 +154,7 @@ jobs:
         shell: bash -l {0}
         # No SIGALRM available on Windows
         if: ${{ matrix.os != 'windows-latest' }}
-        run: sed -i.bak 's/timeout_method = thread/timeout_method = signal/' setup.cfg
+        run: sed -i.bak 's/timeout_method = "thread"/timeout_method = "signal"/' pyproject.toml
 
       - name: Disable IPv6
         shell: bash -l {0}

.pre-commit-config.yaml

@@ -22,7 +22,6 @@ repos:
     hooks:
       - id: black
         language_version: python3
-        exclude: versioneer.py
         args:
           - --target-version=py38
   - repo: https://github.com/pycqa/flake8
@@ -38,14 +37,16 @@ repos:
     rev: v2.2.2
     hooks:
       -   id: codespell
+          additional_dependencies:
+            - tomli
           types_or: [rst, markdown]
           files: docs
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v1.0.0
     hooks:
       - id: mypy
         # Override default --ignore-missing-imports
-        # Use setup.cfg if possible instead of adding command line parameters here
+        # Use pyproject.toml if possible instead of adding command line parameters here
         args: [--warn-unused-configs]
         additional_dependencies:
           # Type stubs

MANIFEST.in

@@ -15,10 +15,8 @@ include setup.py
 include README.rst
 include LICENSE.txt
 include MANIFEST.in
-include requirements.txt
 include distributed/py.typed
 exclude distributed/pytest_resourceleaks.py
 
 prune docs/_build
-include versioneer.py
 include distributed/_version.py

continuous_integration/recipes/distributed/meta.yaml

@@ -27,6 +27,8 @@ requirements:
     - python >=3.8
     - pip
     - dask-core {{ dask_version }}
+    - versioneer =0.28
+    - tomli # [py<311]
   run:
     - python >=3.8
     - click >=8.0