Provide default value for version

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   generate-matrix:
     name: "Generate matrix from cabal"
-    outputs: 
+    outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     runs-on: ubuntu-latest
     steps:
@@ -49,3 +49,15 @@ jobs:
         run: cabal new-build
       - name: Test
         run: cabal new-test all
+  test-generate-matrix-default:
+    name: "Tests whether generating the matrix from cabal works with a default version"
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Extract the tested GHC versions
+        id: set-matrix
+        uses: turion/get-tested@v0.1.6.0
+        with:
+          cabal-file: get-tested.cabal
+          ubuntu: true

action.yml

@@ -35,7 +35,10 @@ runs:
       shell: bash
       run: |
         # Extract e.g. 0.1 from /runner/foo/bar/.../v0.1
-        wget -q https://github.com/Kleidukos/get-tested/releases/download/v${{ inputs.version }}/get-tested-${{ inputs.version }}-linux-amd64 -O get-tested
+        export DEFAULT_VERSION=$(basename $GITHUB_ACTION_PATH | tail -c +2)
+        export VERSION=${{ inputs.version }}
+        VERSION=${:-}
+        wget -q https://github.com/Kleidukos/get-tested/releases/download/v$VERSION/get-tested-$VERSION-linux-amd64 -O get-tested
         chmod +x get-tested
 
         echo "::debug:: Windows enabled: ${{ inputs.windows }}"