make check: Get rid of practices predating PEP 517/518

Makefile

@@ -16,10 +16,11 @@ DOCTEST = $(PYTHON) -B rundoctests.py
 all: build doc
 
 build: configure
-	$(PYTHON) setup.py build
+	$(PIP) install build
+	$(PYTHON) -m build
 
 install: configure
-	$(PIP) install --no-build-isolation --no-index --ignore-installed --no-deps .
+	$(PIP) install .
 
 dist: configure
 	$(PIP) install build
@@ -68,73 +69,13 @@ check-doctest: install
 	$(DOCTEST) src/cysignals/*.pyx
 
 check-example: install
-	cd example && $(PYTHON) setup.py clean build
+	$(PYTHON) -m pip install -U build setuptools Cython
+	cd example && $(PYTHON) -m build --no-isolation .
 
 check-gdb: install
 	$(PYTHON) testgdb.py
 
 
-#####################
-# Check installation
-#####################
-#
-# Test 2 installation scenarios without a real installation
-# - prefix (with --prefix and --root)
-# - user (with --user)
-
-check-tmp:
-	$(MAKE) check-prefix
-	$(MAKE) check-user
-
-prefix-install: configure
-	rm -rf tmp/local tmp/build tmp/site-packages
-	$(PYTHON) setup.py install --prefix="`pwd`/tmp/local" --root=tmp/build
-	cd tmp && mv "build/`pwd`/local" local
-	cd tmp && cp -R local/lib*/python*/site-packages site-packages
-
-check-prefix: check-prefix-doctest check-prefix-example
-
-check-prefix-doctest: prefix-install
-	export PYTHONPATH="`pwd`/tmp/site-packages" && $(DOCTEST) src/cysignals/*.pyx
-
-check-prefix-example: prefix-install
-	rm -rf example/build
-	export PYTHONPATH="`pwd`/tmp/site-packages" && cd example && $(PYTHON) setup.py clean build
-
-check-user: check-user-doctest check-user-example
-
-user-install: configure
-	rm -rf tmp/user
-	export PYTHONUSERBASE="`pwd`/tmp/user" && $(PYTHON) setup.py install --user --old-and-unmanageable
-
-check-user-doctest: user-install
-	export PYTHONUSERBASE="`pwd`/tmp/user" && $(DOCTEST) src/cysignals/*.pyx
-
-check-user-example: user-install
-	export PYTHONUSERBASE="`pwd`/tmp/user" && cd example && $(PYTHON) setup.py clean build
-
-distcheck: dist
-	rm -rf dist/check
-	mkdir -p dist/check
-	cd dist/check && tar xzf ../cysignals-$(VERSION).tar.gz
-	cd dist/check/cysignals-$(VERSION) && $(LS_R) >../dist0.ls
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) all
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) distclean
-	cd dist/check/cysignals-$(VERSION) && $(LS_R) >../dist1.ls
-	cd dist/check; diff -u dist0.ls dist1.ls || { echo >&2 "Error: distclean after all leaves garbage"; exit 1; }
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) check-user
-	cd dist/check/cysignals-$(VERSION) && ./configure --enable-debug
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) check-prefix
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) distclean
-	cd dist/check/cysignals-$(VERSION) && $(LS_R) >../dist2.ls
-	cd dist/check; diff -u dist0.ls dist2.ls || { echo >&2 "Error: distclean after check-tmp leaves garbage"; exit 1; }
-	cd dist/check/cysignals-$(VERSION) && $(MAKE) dist
-	cd dist/check/cysignals-$(VERSION) && tar xzf dist/cysignals-$(VERSION).tar.gz
-	cd dist/check/cysignals-$(VERSION)/cysignals-$(VERSION) && $(LS_R) >../../dist3.ls
-	cd dist/check; diff -u dist0.ls dist3.ls || { echo >&2 "Error: sdist is not reproducible"; exit 1; }
-	rm -rf dist/check
-
-
 #####################
 # Maintain
 #####################
@@ -146,6 +87,4 @@ configure: configure.ac
 
 .PHONY: all build doc install dist doc clean clean-build clean-doc \
 	distclean test check check-all check-tmp check-install \
-	check-doctest check-example \
-	check-prefix prefix-install check-prefix-doctest check-prefix-example \
-	check-user user-install check-user-doctest check-user-example
+	check-doctest check-example

example/pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ['setuptools', 'Cython>=0.28', 'cysignals']
+build-backend = "setuptools.build_meta"

example/setup.py

@@ -21,7 +21,6 @@ def cythonize(self, extensions):
     name="cysignals_example",
     version='1.0',
     license='Public Domain',
-    setup_requires=["cysignals"],
-    ext_modules=["cysignals_example.pyx"],
+    ext_modules=[Extension("cysignals_example.pyx")],
     cmdclass=dict(build=build),
 )