Feature/workflow release (#17)

* Add dry run for twine commands

To test twine steps in Makefile and also in workflows we introduce a test on env var `PYPI_DRY_RUN`.

* Add release workflow

To test it first we let it run in `PYPI_DRY_RUN`.

Author: cmeissner

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: Release Python Package
+
+on:
+  push:
+    tags:
+      - v[0-9]+\.[0-9]+\.[0-9]+
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements-dev.txt
+    - name: Build and publish
+      env:
+        PYPI_API_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+        PYPY_DRY_RUN: True
+      run: make publish

Makefile

@@ -6,6 +6,12 @@ ifdef PYPI_API_TOKEN
 TWINE_OPTIONS += --username __token__ --password $(PYPI_API_TOKEN)
 endif
 
+ifdef PYPI_DRY_RUN
+TWINE_CMD = echo twine
+else
+TWINE_CMD = twine
+endif
+
 default: help
 
 help:
@@ -21,10 +27,10 @@ dist:
 	python3 setup.py sdist bdist_wheel
 
 check: dist
-	twine check dist/*
+	$(TWINE_CMD) check dist/*
 
 publish: check
-	twine upload $(TWINE_OPTIONS) dist/*
+	$(TWINE_CMD) upload $(TWINE_OPTIONS) dist/*
 
 clean:
 	rm -rf build/