Create action.yml

Author: nk2ge5k

action.yml

@@ -0,0 +1,27 @@
+name: 'Add SSH Private key'
+description: 'Connect your GitHub Action workflow to Tailscale'
+branding:
+  icon: 'arrow-right-circle'
+  color: 'green'
+inputs:
+  private_key:
+    description: 'SSH Private key'
+    required: true
+runs:
+    using: 'composite'
+    steps:
+      - name: Check Runner OS
+        if: ${{ runner.os != 'Linux' }}
+        shell: bash
+        run: |
+          echo "::error title=⛔ error hint::Support Linux Only"
+          exit 1
+      - name: Start SSH agent with a key
+        env:
+          SSH_AUTH_SOCK: /tmp/ssh_agent.sock
+        run: |
+            mkdir -p ~/.ssh
+            ssh-keyscan github.com >> ~/.ssh/known_hosts
+            ssh-agent -a $SSH_AUTH_SOCK > /dev/null	
+            ssh-add - <<< "${{ inputs.private_key }}"
+            echo "SSH_AUTH_SOCK=$SSH_AUTH_SOCK" >> $GITHUB_ENV