Add up-to-date check to not recompile things that have not changed

.gitea/workflows/workflow.yml

@@ -37,12 +37,37 @@ jobs:
         run: |
           curl https://idlesleep.wolproxy.seeseepuff.be/status
 
+  check:
+    name: Check if rebuild is necessary
+    runs-on: ubuntu-amd64
+    needs: wake
+    outputs:
+      up-to-date: ${{ steps.up-to-date.outputs.up-to-date }}
+    container:
+      image: gitea.seeseepuff.be/archlinux/archlinux:latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      
+      - name: Ensure image is up-to-date
+        run: |
+          sudo pacman -Sy --noconfirm
+      
+      - name: Check if rebuild is necessary
+        id: up-to-date
+        run: |
+          set +e
+          .gitea/workflows/up-to-date.sh
+          echo "exit_code=$?" >> "$GITHUB_OUTPUT"
+          set -e
+
   build:
     name: Build and Push
     runs-on: ubuntu-amd64
-    needs: wake
+    needs: check
     container:
       image: gitea.seeseepuff.be/archlinux/archlinux:latest
+    if: needs.check.outputs.up-to-date == '1'
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
@@ -50,6 +75,10 @@ jobs:
       - name: Ensure image is up-to-date
         run: |
           sudo pacman -Syu --noconfirm
+      
+      - name: Check if rebuild is necessary
+        run: |
+          .gitea/workflows/up-to-date.sh
 
       - name: Build package
         run: |