release pkgs only on changes

.github/workflows/arch_pkgs.yml

@@ -2,11 +2,26 @@ name: PKGBUILD CI
 
 on:
   push:
-    tags:
-      - '*'
+    branches: [ main ]
   workflow_dispatch:
 
 jobs:
+  changes:
+    runs-on: ubuntu-latest
+    # Required permissions
+    permissions:
+      pull-requests: read
+    # Set job outputs to values from filter step
+    outputs:
+      pgkbuild: ${{ steps.filter.outputs.pgkbuild }}
+    steps:
+    # For pull requests it's not necessary to checkout the code
+    - uses: dorny/paths-filter@v2
+      id: filter
+      with:
+        filters: |
+          pkgbuild: 
+            - arch_pkgs/**
   build-packages:
     strategy:
       fail-fast: false
@@ -69,9 +84,9 @@ jobs:
 #           ssh_keyscan_types: rsa,dsa,ecdsa,ed25519
 #           allow_empty_commits: false
   publish-to-repo:
-    if: github.event_name != 'pull_request'
+    if: ${{ github.event_name != 'pull_request' && needs.changes.outputs.pgkbuild == 'true' }}
     runs-on: ubuntu-latest
-    needs: [build-packages]
+    needs: [build-packages, changes]
     container: 
       image: archlinux:base-devel
     steps: