CI: naming fixes and add draft-release job.

The 'draft-release' job runs on any tagged commit and creates a new
release, marked as draft, and containing an automatically generated
changelog.

.github/workflows/ci.yml

@@ -18,34 +18,34 @@ jobs:
       with:
         python-version: '3.8'
 
-    - name: Install LLVM (Ubuntu) 📚
+    - name: 📚 Install LLVM (Ubuntu)
       if: matrix.os == 'ubuntu-20.04'
       shell: bash
       run: |
         sudo apt update
         sudo apt install --fix-broken libc++-dev llvm clang libomp-dev
 
-    - name: Install LLVM (MacOS) 📚
+    - name: 📚 Install LLVM (MacOS)
       if: matrix.os == 'macos-latest'
       shell: bash
       run: |
         brew update
         brew install llvm
 
-    - name: Install LLVM (Windows) book 📚
+    - name: 📚 nstall LLVM (Windows)
       if: matrix.os == 'windows-latest'
       shell: pwsh
       run: |
         Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1'))
         choco install llvm
 
-    - name: Install clang-build ⚙
+    - name: ⚙ Install clang-build
       run: |
         pip install setuptools
         pip install codecov
         python setup.py develop
 
-    - name: Run tests 🧪
+    - name: 🧪 Run tests
       shell: bash
       run: |
         if [ ${{ matrix.os == 'macos-latest' }} ]; then export PATH=/usr/local/opt/llvm/bin:$PATH; fi
@@ -55,5 +55,33 @@ jobs:
         python -m coverage run setup.py test
         python -m coverage combine
 
-    - name: Upload coverage 👆
-      run: codecov
+    - name: 👆 Upload coverage
+      run: codecov
+
+  draft-release:
+    if: github.event_name == 'push' && startsWith( github.ref, 'refs/tags/' )
+    needs: [test]
+    runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: 📄 Generate a changelog
+      id: changelog
+      uses: metcalfc/changelog-generator@v1.0.0
+      with:
+        myToken: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: 📄 Print the changelog
+      run: echo "${{ steps.changelog.outputs.changelog }}"
+
+    - name: 🎉 Create draft release
+      id: draft_release
+      uses: actions/create-release@v1
+      with:
+        tag_name: ${{ github.ref }}
+        release_name: Release ${{ github.ref }}
+        body: ${{ steps.changelog.outputs.changelog }}
+        draft: true