add release tester

.travis.yml

@@ -80,6 +80,10 @@ jobs:
   #   env:
   #   - TOXENV=dev
   #   - EXTRA_ARGS=
+  - name: "check MANIFEST.in completeness"
+    python: 3.7
+    install: ""
+    script: RELEASE_SKIP=head ${TRAVIS_BUILD_DIR}/misc/release-test.sh
   allow_failures:
   - name: "run test suite with python 3.9"
     python: 3.9-dev

misc/release-test.sh

@@ -0,0 +1,97 @@
+#!/bin/bash
+
+set -e
+set -x
+
+export LC_ALL=C
+export TEST_MYPYC=1
+export MYPY_USE_MYPYC=1
+export CC=clang MYPYC_OPT_LEVEL=0
+
+package=mypy
+module=mypy
+slug=${TRAVIS_PULL_REQUEST_SLUG:=python/mypy}
+repo=https://github.com/${slug}.git
+test_prefix=""
+run_tests() {
+	"${test_prefix}bin/py.test" --pyargs -x ${module} -n auto --dist=loadfile
+}
+pipver=9.0.0  # minimum required version of pip given python3.6+
+setuptoolsver=24.2.0 # required to generate correct metadata for
+                     # python_requires
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." >/dev/null && pwd )"
+
+rm -Rf testenv? || /bin/true
+
+export HEAD=${TRAVIS_PULL_REQUEST_SHA:-$(git rev-parse HEAD)}
+
+if [ "${RELEASE_SKIP}" != "head" ]
+then
+	virtualenv testenv1 -p python3
+	# First we test the head
+	# shellcheck source=/dev/null
+	source testenv1/bin/activate
+	rm -Rf testenv1/local
+	rm -f testenv1/lib/python-wheels/setuptools* \
+		&& pip install --force-reinstall -U pip==${pipver} \
+	        && pip install setuptools==${setuptoolsver} wheel
+	pip install -rmypy-requirements.txt
+	pip install -rtest-requirements.txt
+	python setup.py build_ext
+	./runtests.py
+	pip uninstall -y ${package} || true; pip uninstall -y ${package} || true; pip install .
+	mkdir testenv1/not-${module}
+	# if there is a subdir named '${module}' py.test will execute tests
+	# there instead of the installed module's tests
+	pushd testenv1/not-${module}
+	# shellcheck disable=SC2086
+	test_prefix=../ run_tests; popd
+fi
+
+virtualenv testenv2 -p python3
+virtualenv testenv3 -p python3
+virtualenv testenv4 -p python3
+rm -Rf testenv[234]/local
+
+# Secondly we test via pip
+
+cd testenv2
+# shellcheck source=/dev/null
+source bin/activate
+rm -f lib/python-wheels/setuptools* \
+	&& pip install --force-reinstall -U pip==${pipver} \
+        && pip install setuptools==${setuptoolsver} wheel typing_extensions mypy_extensions typed_ast
+pip install -e "git+${repo}@${HEAD}#egg=${package}"
+cd src/${package}
+pip install -rmypy-requirements.txt
+pip install -rtest-requirements.txt
+python setup.py sdist bdist_wheel
+./runtests.py
+cp dist/${package}*tar.gz ../../../testenv3/
+pip uninstall -y ${package} || true; pip uninstall -y ${package} || true; MYPY_USE_MYPYC=1 pip install .
+cd ../.. # no subdir named ${proj} here, safe for py.testing the installed module
+# shellcheck disable=SC2086
+run_tests
+
+# Is the distribution in testenv2 complete enough to build another
+# functional distribution?
+
+cd ../testenv3/
+# shellcheck source=/dev/null
+source bin/activate
+rm -f lib/python-wheels/setuptools* \
+	&& pip install --force-reinstall -U pip==${pipver} \
+        && pip install setuptools==${setuptoolsver} wheel
+pip install "-r${DIR}/mypy-requirements.txt"
+pip install "-r${DIR}/test-requirements.txt"
+pip install ${package}*tar.gz
+mkdir out
+tar --extract --directory=out -z -f ${package}*.tar.gz
+cd out/${package}*
+python setup.py sdist bdist_wheel
+./runtests.py
+pip uninstall -y ${package} || true; pip uninstall -y ${package} || true; pip install .
+mkdir ../not-${module}
+pushd ../not-${module}
+# shellcheck disable=SC2086
+test_prefix=../../ run_tests; popd