Add ssh-key option

.github/workflows/check-downstream-compiles.yml

@@ -11,6 +11,10 @@ name: Check downstream dependency compiles
 
 on:
   workflow_call:
+    secrets:
+      SSH_PRIVATE_KEY:
+        required: false
+        description: ''
     inputs:
       runner:
         required: false
@@ -21,6 +25,11 @@ on:
         required: false
         default: 'lurk-lab/lurk-rs'
         type: string
+      # Used to checkout private repos
+      ssh-key:
+        required: false
+        default: false
+        type: boolean
       # List of prerequisite Ubuntu packages, separated by whitespace
       packages:
         required: false
@@ -39,6 +48,10 @@ jobs:
         if: inputs.packages != ''
         with:
           packages: "${{ inputs.packages }}"
+      - uses: webfactory/[email protected]
+        if: inputs.ssh-key
+        with:
+          ssh-private-key: "${{ secrets.SSH_PRIVATE_KEY }}"
       - name: Set env
         run: |
           echo "DOWNSTREAM_REPO=$(echo ${{ inputs.repository }} | awk -F'/' '{ print $2 }')" | tee -a $GITHUB_ENV