Update tox action to understand parameters if used in PR flow (#154)

* Update tox action to understand parameters if used in PR flow

* Allow passing checkout reference and fetch depth if needed

---------

Co-authored-by: Martin Jackson <[email protected]>

Author: mhjacks

.github/workflows/tox.yml

@@ -12,13 +12,31 @@ on:
         required: false
         type: string
         default: ""
+      checkout_ref:
+        description: Repository reference to pass to checkout action
+        required: false
+        type: string
+        default: ""
+      checkout_fetch_depth:
+        description: Fetch depth to pass to checkout action
+        required: false
+        type: string
+        default: "0"
 jobs:
   tox:
     runs-on: ubuntu-latest
     name: Run Tox based code tests
     steps:
       - name: Code checkout
+        if: ${{ ! inputs.checkout_ref }}
+        uses: actions/checkout@v3
+
+      - name: Code checkout with parameters
+        if: ${{ inputs.checkout_ref }}
         uses: actions/checkout@v3
+        with:
+          ref: ${{ inputs.checkout_ref }}
+          fetch-depth: ${{ inputs.checkout_fetch_depth }}
 
       - name: Run tests
         uses: ansible-network/github_actions/.github/actions/tox@main