ci: fix workflow trigger conditions

.github/workflows/e2e_test_for_prs.yml

@@ -1,12 +1,32 @@
 name: Run e2e for topic branch
 on:
   pull_request:
-    paths-ignore:
-      - '**.md'
-      - 'cloudformation/*.yml'
 
 jobs:
+  check-changed-files:
+    runs-on: ubuntu-20.04
+    name: Check changed files
+    outputs:
+      NEED_TO_RUN_TESTS: ${{ steps.decision.outputs.NEED_TO_RUN_TESTS }}
+    steps:
+      - id: files
+        uses: jitterbit/get-changed-files@b17fbb00bdc0c0f63fcf166580804b4d2cdc2a42
+      - name: Make decision based on changed files
+        id: decision
+        run: |
+          needToRunTests=false
+          for changed_file in ${{ steps.files.outputs.all }}; do
+            if [[ ${changed_file} =~ ^(proxy|scripts|mgmt-lambda)\/.+$ ]]; then
+              needToRunTests=true
+            fi
+            if [[ ${changed_file} =~ ^\.github\/workflows\/.+$ ]]; then
+              needToRunTests=true
+            fi
+          done
+          echo $needToRunTests
+          echo NEED_TO_RUN_TESTS=${needToRunTests} >> $GITHUB_OUTPUT
   run-e2e-for-topic-branch:
+    if: needs['check-changed-files'].outputs.NEED_TO_RUN_TESTS == 'true'
     permissions:
       id-token: write # This is required for requesting the JWT
       contents: read  # This is required for actions/checkout

buildspec-e2e-pr-join-artifacts.yml

@@ -3,8 +3,8 @@ version: 0.2
 phases:
   build:
     commands:
-      - ls -la $CODEBUILD_SRC_DIR # rc branch, also called as primary source
-      - ls -la $CODEBUILD_SRC_DIR_SourceArtifact # topic branch
+      # $CODEBUILD_SRC_DIR => rc branch
+      # $CODEBUILD_SRC_DIR_SourceArtifact => topic branch
       - cd $CODEBUILD_SRC_DIR_SourceArtifact
       - git status
       - cp $CODEBUILD_SRC_DIR/buildspec-e2e.yml buildspec-e2e.yml