Auto-build Docker images before on-merge if setup.py was changed (#17573)

* Auto-build on setup modification

* Modify push-caller

* Make adjustments based on code review

.github/workflows/build-docker-images.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - docker-image*
   repository_dispatch:
+  workflow_call:
   schedule:
     - cron: "0 1 * * *"
 

.github/workflows/self-push-caller.yml

@@ -13,9 +13,40 @@ on:
       - "utils/**"
 
 jobs:
+  check-for-setup:
+      runs-on: ubuntu-latest
+      name: Check if setup was changed
+      outputs:
+        changed: ${{ steps.was_changed.outputs.changed }}
+      steps:
+        - uses: actions/checkout@v3
+          with: 
+            fetch-depth: "2"
+        
+        - name: Get changed files
+          id: changed-files
+          uses: tj-actions/changed-files@v22.2
+        
+        - name: Was setup changed 
+          id: was_changed
+          run: |
+            for file in ${{ steps.changed-files.outputs.all_changed_files }}; do
+              if [ `basename "${file}"` = "setup.py" ]; then
+                echo ::set-output name=changed::"1"
+              fi
+            done
+
+  build-docker-containers:
+    needs: check-for-setup
+    if: (github.event_name == 'push') && (needs.check-for-setup.outputs.changed == '1')
+    uses: ./.github/workflows/build-docker-images.yml
+    secrets: inherit
+
   run_push_ci:
     name: Trigger Push CI
     runs-on: ubuntu-latest
+    if: ${{ always() }}
+    needs: build-docker-containers
     steps:
       - name: Trigger push CI via workflow_run
         run: echo "Trigger push CI via workflow_run"
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