feat: 👷 mirroring

.github/workflows/mirror.yml

@@ -0,0 +1,31 @@
+name: Mirror
+on:
+  push:
+    branches: ["main", "dev"]
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for SSH presence
+        run: ssh -V
+      - name: Add SSH key
+        run: ssh-add - <<< ${{ secrets.MIRROR_SSH_KEY }}
+      - name: Set up Git credentials
+        run: |
+          git config --global user.name "Mirror Sync Action"
+          git config --global user.email ${{ secrets.MIRROR_EMAIL }}
+      - name: Add mirror remote
+        run: |
+          if git remote get-url mirror; then
+            echo "Mirror remote already exists"
+          else
+            git remote add mirror git@github.com:ImperialCollegeLondon/matlab-repo-init.git
+          fi
+      - run: git fetch mirror
+      - if: false
+        name: Push to mirror
+        run: git push --mirror mirror