[CI] Do not run 'pre-commit' job on post commit (learning-process#500)

Author: aobolensk

.github/workflows/ubuntu.yml

@@ -4,6 +4,7 @@ on:
 jobs:
   pre-commit:
     runs-on: ubuntu-24.04
+    if: github.event_name != 'push'
     steps:
       - uses: actions/checkout@v4
         with:
@@ -17,14 +18,8 @@ jobs:
           python3 -m pip install -r requirements.txt
       - name: Run pre-commit checks
         run: |
-          # For push events, compare with previous commit
-          if [ "${{ github.event_name }}" = "push" ]; then
-            pre-commit run --from-ref HEAD~1 --to-ref HEAD
-          else
-            # For PRs, compare with base branch
-            git fetch origin ${{ github.base_ref }}:${{ github.base_ref }}
-            pre-commit run --from-ref ${{ github.base_ref }} --to-ref HEAD
-          fi
+          git fetch origin ${{ github.base_ref }}:${{ github.base_ref }}
+          pre-commit run --from-ref ${{ github.base_ref }} --to-ref HEAD
   gcc-build:
     needs:
       - pre-commit