checks if base is up to date before release

.github/workflows/vib-build.yml

@@ -24,9 +24,28 @@ jobs:
       env:
         GH_TOKEN: ${{ github.token }}
 
+  check_base_status:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Clone base image. 
+      if: ${{ github.ref_type == 'tag' }}
+      uses: actions/checkout@v4
+      with:
+        repository: Vanilla-OS/core-image
+
+    - name: Check if base is up to date.
+      if: ${{ github.ref_type == 'tag' }}
+      run: |
+        git fetch origin
+        main_head=$( git rev-parse origin/main )
+        dev_head=$( git rev-parse origin/dev )
+        echo main branch is at: $main_head
+        echo dev branch is at: $dev_head
+        [ "$main_head" = "$dev_head" ]
+
   build:
     runs-on: ubuntu-latest
-    needs: verify-image
+    needs: [verify-image, check_base_status]
     permissions:
       contents: write # Allow actions to create release
       packages: write # Allow pushing images to GHCR