ci: add cross-platform unit test matrix and fix FOSSA skip

- Add ubuntu, macos, windows to unit test matrix (#25)
- FOSSA: gracefully skip all steps when FOSSA_API_KEY is not configured

Signed-off-by: Sebastien Tardif <sebtardif@ncf.ca>

Author: SebTardif

.github/workflows/ci.yml

@@ -14,7 +14,10 @@ concurrency:
 
 jobs:
   unit-test:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     steps:
       - name: Checkout

.github/workflows/fossa.yml

@@ -16,23 +16,33 @@ concurrency:
 jobs:
   fossa:
     name: License compliance
-    if: secrets.FOSSA_API_KEY != ''
     env:
       FOSSA_API_KEY: ${{ secrets.FOSSA_API_KEY }}
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
+      - name: Check API key
+        id: check
+        run: |
+          if [ -z "$FOSSA_API_KEY" ]; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            echo "FOSSA_API_KEY not configured, skipping"
+          fi
+
       - name: Checkout
+        if: steps.check.outputs.skip != 'true'
         uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           persist-credentials: false
 
       - name: Run FOSSA analysis
+        if: steps.check.outputs.skip != 'true'
         uses: fossas/fossa-action@ff70fe9fe17cbd2040648f1c45e8ec4e4884dcf3 # v1
         with:
           api-key: ${{ secrets.FOSSA_API_KEY }}
 
       - name: Run FOSSA test
+        if: steps.check.outputs.skip != 'true'
         uses: fossas/fossa-action@ff70fe9fe17cbd2040648f1c45e8ec4e4884dcf3 # v1
         with:
           api-key: ${{ secrets.FOSSA_API_KEY }}