Switch from pipenv to poetry

- dropped dev dependency on rope, isort & flake
- poetry doesn't support dev scripts like pipenv, so create a makefile instead
- Add pytest-cov
- Use tox for testing multiple python versions in CI
- Update README

Update ci workflow

.github/workflows/ci.yml

@@ -14,39 +14,29 @@ jobs:
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
-      - uses: dschep/install-pipenv-action@v1
+      - uses: Gr1N/setup-poetry@v2
       - name: Install dependencies
-        run: |
-          pipenv install --dev --python ${pythonLocation}/python
+        run: make setup
       - name: Run black
-        run: |
-          pipenv run black . --check --diff --exclude tests/output_
+        run: make check-style
 
   run-tests:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        python-version: [ '3.6', '3.7' ]
-
-    name: Python ${{ matrix.python-version }} test
+    name: Run tests with tox
 
     steps:
       - uses: actions/checkout@v1
       - uses: actions/setup-python@v1
         with:
-          python-version: ${{ matrix.python-version }}
-      - uses: dschep/install-pipenv-action@v1
+          python-version: 3.7
+      - uses: Gr1N/setup-poetry@v2
       - name: Install dependencies
         run: |
           sudo apt install protobuf-compiler libprotobuf-dev
-          pipenv install --dev --python ${pythonLocation}/python
+          make setup
       - name: Run tests
-        run: |
-          cp .env.default .env
-          pipenv run pip install -e .
-          pipenv run generate
-          pipenv run test
+        run: make full-test
 
   build-release:
     runs-on: ubuntu-latest
@@ -56,17 +46,11 @@ jobs:
       - uses: actions/setup-python@v1
         with:
           python-version: 3.7
-      - uses: dschep/install-pipenv-action@v1
-      - name: Install dependencies
-        run: |
-          sudo apt install protobuf-compiler libprotobuf-dev
-          pipenv install --dev --python ${pythonLocation}/python
+      - uses: Gr1N/setup-poetry@v2
       - name: Build package
+        run: poetry build
+      - name: Publish package to PyPI
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        run: pipenv run python setup.py sdist
-      - name: Publish package
-        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
-        uses: pypa/gh-action-pypi-publish@v1.0.0a0
-        with:
-          user: __token__
-          password: ${{ secrets.pypi }}
+        run: poetry publish -n
+        env:
+          POETRY_PYPI_TOKEN_PYPI: ${{ secrets.pypi }}

.gitignore

@@ -1,3 +1,5 @@
+.coverage
+.DS_Store
 .env
 .vscode/settings.json
 .mypy_cache
@@ -9,4 +11,5 @@ betterproto/tests/output_*
 dist
 **/*.egg-info
 output
-.idea
+.idea
+.tox

Makefile

@@ -0,0 +1,43 @@
+help:               ##	- Show this help.
+	@fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##//'
+
+# Dev workflow tasks
+
+setup:              ##	- Setup the virtualenv with poetry
+	poetry install -E compiler
+
+generate:           ##	- Generate test cases (do this once before running test)
+	poetry run ./betterproto/tests/generate.py
+
+test:               ##	- Run tests
+	poetry run pytest --cov betterproto
+
+types:              ##	- Check types with mypy
+	poetry run mypy betterproto --ignore-missing-imports
+
+format:             ##	- Apply black formatting to source code
+	poetry run black . --exclude tests/output_
+
+clean:						  ## - Clean out generated files from the workspace
+	rm -rf .coverage \
+	       .mypy_cache \
+	       .pytest_cache \
+	       dist \
+	       **/__pycache__ \
+	       betterproto/tests/output_*
+
+# Manual testing
+
+# By default write plugin output to a directory called output
+o=output
+plugin:             ##	- Execute the protoc plugin, with output writte to `output` or the value passed to `-o`
+	mkdir -p $(o)
+	protoc --plugin=protoc-gen-custom=betterproto/plugin.py $(i) --custom_out=$(o)
+
+# CI tasks
+
+full-test: generate ##	- Run full testing sequence
+	poetry run tox
+
+check-style:        ##	- Check if code style is correct
+	poetry run black . --check --diff --exclude tests/output_