Merge pull request #10 from arvatoaws-labs/stack-filter

final job

Author: Marta-Panfilova-ASL

.github/workflows/githubaction-comment-apply.yml

@@ -34,7 +34,56 @@ on:
 
 
 jobs:
+  check-changes:
+    runs-on: ubuntu-latest
+    outputs:
+      stack_changed: ${{ steps.filter.outputs.stack_changed }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Important to fetch all history for branches
+
+      - name: Check for changes in the stack based on input
+        id: filter
+        run: |
+          STACK_DIR=${{ inputs.stack }}
+          echo "Checking for changes in the $STACK_DIR directory..."
+          
+          PR_NUMBER=$(echo ${{ github.event.issue.pull_request.url }} | grep -o '[^/]*$')
+          
+          HEAD_SHA=$(gh pr view $PR_NUMBER --json headRefOid -q .headRefOid)
+          BASE_BRANCH=$(gh pr view $PR_NUMBER --json baseRefName -q .baseRefName)
+          
+          # Ensure correct repo syntax for GH API call
+          REPO="${{ github.repository }}"
+          BASE_SHA=$(gh api repos/$REPO/commits/$BASE_BRANCH --jq '.sha')
+          
+          echo "Base branch latest commit SHA: $BASE_SHA, PR head commit SHA: $HEAD_SHA"
+          
+          if git diff --name-only $BASE_SHA $HEAD_SHA | grep -q "^${STACK_DIR}/"; then
+            echo "Changes detected in the $STACK_DIR directory."
+            echo "stack_changed=true" >> $GITHUB_OUTPUT
+          else
+            echo "No changes detected in the $STACK_DIR directory."
+            echo "stack_changed=false" >> $GITHUB_OUTPUT
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        shell: bash
+
+      - name: Set output
+        run: |
+          echo "Final stack_changed value: ${{ env.stack_changed }}"
+          echo "stack_changed=${{ env.stack_changed }}" >> $GITHUB_OUTPUT
+      - name: Debug stack_changed output
+        run: |
+          echo "stack_changed set to: ${{ steps.filter.outputs.stack_changed }}"
+        if: always()
+
   terraform:
+    needs: check-changes
+    if: needs.check-changes.outputs.stack_changed == 'true'
     name: 'Apply Terraform'
     runs-on: ubuntu-latest
     outputs: