Made PR checks only run when relevant files are changed

.github/workflows/check-backend-changes.yml

@@ -0,0 +1,23 @@
+name: Check Backend Changes
+
+on:
+  workflow_call:
+    outputs:
+      run-tests:
+        description: "Whether to run tests based on backend changes"
+        value: ${{ jobs.check-run-needed.outputs.run-tests }}
+
+jobs:
+  check-run-needed:
+    runs-on: ubuntu-latest
+    outputs:
+      run-tests: ${{ steps.check.outputs.run-tests }}
+    steps:
+      - uses: actions/checkout@v4
+      - id: check
+        run: |
+          if git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep -q '^backend/'; then
+            echo "run-tests=true" >> $GITHUB_OUTPUT
+          else
+            echo "run-tests=false" >> $GITHUB_OUTPUT
+          fi

.github/workflows/pr-python-checks.yml

@@ -6,7 +6,12 @@ on:
     branches: [ main ]
 
 jobs:
+  check-changes:
+    uses: ./.github/workflows/check-backend-changes.yml
+
   mypy-check:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'true'
     runs-on: ubuntu-latest
 
     steps:
@@ -47,3 +52,10 @@ jobs:
       run: |
         cd backend
         black --check .
+
+  skip-tests:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'false'
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "No changes in backend, skipping this test."

.github/workflows/pr-python-connector-tests.yml

@@ -17,7 +17,12 @@ env:
   CONFLUENCE_ACCESS_TOKEN: ${{ secrets.CONFLUENCE_ACCESS_TOKEN }}
 
 jobs:
+  check-changes:
+    uses: ./.github/workflows/check-backend-changes.yml
+
   connectors-check:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'true'
     runs-on: ubuntu-latest
 
     env:
@@ -55,3 +60,10 @@ jobs:
             -H 'Content-type: application/json' \
             --data '{"text":"Scheduled Connector Tests failed! Check the run at: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"}' \
             $SLACK_WEBHOOK
+
+  skip-tests:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'false'
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "No changes in backend, skipping this test."

.github/workflows/pr-python-tests.yml

@@ -6,7 +6,12 @@ on:
     branches: [ main ]
 
 jobs:
+  check-changes:
+    uses: ./.github/workflows/check-backend-changes.yml
+
   backend-check:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'true'
     runs-on: ubuntu-latest
 
     env:
@@ -34,3 +39,11 @@ jobs:
     - name: Run Tests
       shell: script -q -e -c "bash --noprofile --norc -eo pipefail {0}"
       run: py.test -o junit_family=xunit2 -xv --ff backend/tests/unit
+
+
+  skip-tests:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'false'
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "No changes in backend, skipping this test."

.github/workflows/run-it.yml

@@ -12,7 +12,12 @@ env:
   OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
 
 jobs:
+  check-changes:
+    uses: ./.github/workflows/check-backend-changes.yml
+
   integration-tests:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'true'
     runs-on: 
       group: 'arm64-image-builders'
     steps:
@@ -158,3 +163,10 @@ jobs:
         run: |
           cd deployment/docker_compose
           docker compose -f docker-compose.dev.yml -p danswer-stack down -v
+
+  skip-tests:
+    needs: check-changes
+    if: needs.check-changes.outputs.run-tests == 'false'
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "No changes in backend, skipping this test."