ci: add release and publish workflows

.github/workflows/draft_release.yaml

@@ -0,0 +1,30 @@
+on:
+  pull_request:
+    types: [closed]
+    branches:
+      - 'main'
+
+jobs:
+  version:
+    if: github.event.pull_request.merged == true
+    name: Version and Draft Release
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Bump version and push tag
+        id: tag_version
+        uses: mathieudutour/[email protected]
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Create a GitHub Draft Release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.tag_version.outputs.new_tag }}
+          release_name: Release ${{ steps.tag_version.outputs.new_tag }}
+          body: ${{ steps.tag_version.outputs.changelog }}
+          draft: true
+          prerelease: false

.github/workflows/publish.yaml

@@ -0,0 +1,26 @@
+name: Publish release to Pypi
+
+on:
+  release:
+     types: [published]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/[email protected]
+      with:
+        token: ${{secrets.SUBMOD_PAT}}
+        submodules: recursive
+        fetch-depth: 0 # needed to retrieve most recent tag
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.8
+    - name: Build
+      run: make build
+    - name: Publish to PyPI
+      uses: pypa/gh-action-pypi-publish@master
+      with:
+        password: ${{ secrets.PYPI_API_TOKEN }}

.github/workflows/test.yaml

@@ -15,7 +15,7 @@ jobs:
       with:
         token: ${{secrets.SUBMOD_PAT}}
         submodules: recursive
-        #lfs: true
+        fetch-depth: 0 # needed to retrieve most recent tag
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2
       with:

setup.py

@@ -19,7 +19,7 @@ def get_current_version_tag():
         base_tag, num_commits = dev_tags.pop().split("-")[:2]
         return "{}.dev{}".format(base_tag, num_commits)[1:]
     else:
-        raise Exception("Unable to determine or construct version from git tags.")
+        return "0.0.0.dev0"
 
 
 with open("README.md", "r") as readme_file: