Replace setup.py with PyPA "build" (#371)

Use the `build` package to generate source and wheel distributions.
This means we can remove the `setup.py` file entirely since it's not
needed. Update the GitHub Actions workflows to match.

.github/workflows/docs.yml

@@ -102,7 +102,7 @@ jobs:
 
       - name: Build source and wheel distributions
         run: |
-          python setup.py sdist bdist_wheel
+          make build
           echo ""
           echo "Generated files:"
           ls -lh dist/

.github/workflows/pypi.yml

@@ -23,8 +23,12 @@ defaults:
 
 jobs:
 
+  #############################################################################
+  # Build the wheel and source archives and check them with Twine
   build:
     runs-on: ubuntu-latest
+    # Only publish from the origin repository, not forks
+    if: github.repository_owner == 'fatiando'
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE
@@ -65,7 +69,7 @@ jobs:
 
       - name: Build source and wheel distributions
         run: |
-          python setup.py sdist bdist_wheel
+          make build
           echo ""
           echo "Generated files:"
           ls -lh dist/
@@ -82,6 +86,8 @@ jobs:
           name: pypi-${{ github.sha }}
           path: dist
 
+  #############################################################################
+  # Publish built wheels and source archives to PyPI and test PyPI
   publish:
     runs-on: ubuntu-latest
     needs: build

.github/workflows/test.yml

@@ -125,7 +125,7 @@ jobs:
 
       - name: Build source and wheel distributions
         run: |
-          python setup.py sdist bdist_wheel
+          make build
           echo ""
           echo "Generated files:"
           ls -lh dist/

Makefile

@@ -2,7 +2,7 @@
 PROJECT=verde
 TESTDIR=tmp-test-dir-with-unique-name
 PYTEST_ARGS=--cov-config=../.coveragerc --cov-report=term-missing --cov=$(PROJECT) --doctest-modules -v --pyargs
-CHECK_STYLE=setup.py $(PROJECT) doc tools
+CHECK_STYLE=$(PROJECT) doc tools
 
 help:
 	@echo "Commands:"
@@ -11,11 +11,15 @@ help:
 	@echo "  test      run the test suite (including doctests) and report coverage"
 	@echo "  format    automatically format the code"
 	@echo "  check     run code style and quality checks"
+	@echo "  build     build source and wheel distributions"
 	@echo "  clean     clean up build and generated files"
 	@echo ""
 
+build:
+	python -m build .
+
 install:
-	pip install --no-deps -e .
+	python -m pip install --no-deps -e .
 
 test:
 	# Run a tmp folder to make sure the tests are run on the installed version
@@ -49,7 +53,6 @@ isort-check:
 flake8:
 	flake8 $(CHECK_STYLE)
 
-
 clean:
 	find . -name "*.pyc" -exec rm -v {} \;
 	find . -name ".coverage.*" -exec rm -v {} \;

env/requirements-build.txt

@@ -1,6 +1,3 @@
-setuptools_scm>=6.2
-setuptools>=45
-wheel
+# Requirements to build and check distributions
+build
 twine
-# TOML parser dropped 3.6 and is causing problems. Remove once we drop 3.6
-tomli<2.0.0

environment.yml

@@ -6,10 +6,8 @@ dependencies:
     - python==3.10
     - pip
     # Build
-    - setuptools_scm>=6.2
-    - setuptools>=45
-    - wheel
     - twine
+    - build
     # Run
     - numpy
     - scipy