Add github action

.github/workflows/ci.yml

@@ -10,17 +10,9 @@ jobs:
   generate-matrix:
     name: "Generate matrix from cabal"
     runs-on: ubuntu-latest
-    outputs:
-      matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
-      - name: Checkout base repo
-        uses: actions/checkout@v4
-      - name: Extract the tested GHC versions
-        id: set-matrix
-        run: |
-          wget https://github.com/Kleidukos/get-tested/releases/download/v0.1.5.0/get-tested-0.1.5.0-linux-amd64 -O get-tested
-          chmod +x get-tested
-          ./get-tested --ubuntu --macos get-tested.cabal >> $GITHUB_OUTPUT
+      - name: Generate matrix
+        uses: turion/[email protected]
   tests:
     name: ${{ matrix.ghc }} on ${{ matrix.os }}
     needs: generate-matrix

action.yml

@@ -0,0 +1,25 @@
+name: "Generate matrix from cabal"
+
+inputs:
+  cabal-file:
+    description: "The path to your cabal file, e.g. somefolder/myproject.cabal"
+    required: true
+
+outputs:
+  matrix: ${{ steps.set-matrix.outputs.matrix }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Checkout base repo
+      uses: actions/checkout@v2
+    - name: Extract the tested GHC versions
+      id: set-matrix
+      run: |
+        wget https://github.com/Kleidukos/get-tested/releases/download/v0.1.5.0/get-tested-0.1.5.0-linux-amd64 -O get-tested
+        chmod +x get-tested
+        ./get-tested --ubuntu --macos ${{ inputs.cabal-file }} >> $GITHUB_OUTPUT
+
+branding:
+  icon: 'list'
+  color: 'blue'