Start testing release packager

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
-# to be completed once macOS builds fixed
+  # to be completed once macOS builds fixed
   create-and-publish-release:
     needs: build-and-check
     if: startsWith(github.ref, 'refs/tags/') && success()
@@ -34,8 +34,9 @@ jobs:
       matrix:
         # `--windowed` is for macOS, and `--onefile` is for other OSes.
         pyinstaller-type: ['--windowed', '--onefile']
-    runs-on: ubuntu-latest
-    name: Builder for Python all-in-one executables, published on a releases
+        runner: ["macos-latest", "windows-latest", "ubuntu-latest"]
+    runs-on: ${{ matrix.runner }}
+    name: Builder for Python all-in-one executables, published on a release.
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
@@ -48,7 +49,11 @@ jobs:
           python -m pip install --upgrade pip
           pip install pyinstaller
           pip install -r requirements.txt
-      - name: Build RSSingle
-        run: pyinstaller ${{ matrix.pyinstaller-type }} ./rssingle.py
+      - name: Build RSSingle (Windows, Linux)
+        if: ${{ matrix.runner != 'macos-latest' }}
+        run: pyinstaller --onefile ./rssingle.py
+      - name: Build RSSingle (macOS)
+        if: ${{ matrix.runner == 'macos-latest' }}
+        run: pyinstaller --windowed ./rssingle.py
       - name: List artifacts for finishing this action
         run: find ./dist/