Write Diff Train import branch to this repo

Author: bigfootjon

.github/workflows/commit_artifacts.yml

@@ -210,7 +210,7 @@ jobs:
           commit_user_email: ${{ github.actor }}@users.noreply.github.com
           create_branch: true
 
-  commit_fbsource_artifacts:
+  commit_fbsource_artifacts_external_repo:
     needs: download_artifacts
     runs-on: ubuntu-latest
     if: ${{ (github.ref == 'refs/heads/main' && needs.download_artifacts.outputs.fbsource_branch_count == '0') || github.ref == 'refs/heads/meta-fbsource' }}
@@ -245,3 +245,39 @@ jobs:
             DiffTrain build for commit https://github.com/facebook/react/commit/${{ github.sha }}.
           commit_user_name: ${{ github.actor }}
           commit_user_email: ${{ github.actor }}@users.noreply.github.com
+
+  commit_fbsource_artifacts:
+    needs: download_artifacts
+    if: ${{ (github.ref == 'refs/heads/main' && needs.download_artifacts.outputs.fbsource_branch_count == '0') || github.ref == 'refs/heads/meta-fbsource' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: builds/facebook-fbsource
+      - name: Ensure clean directory
+        run: rm -rf compiled
+      - uses: actions/download-artifact@v3
+        with:
+          name: compiled-rn
+          path: compiled-rn/
+      - run: git status -u
+      - name: Check if only the REVISION file has changed
+        id: check_should_commit
+        run: |
+          if git status --porcelain | grep -qv '/REVISION$'; then
+            echo "should_commit=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "should_commit=false" >> "$GITHUB_OUTPUT"
+          fi
+      - name: Commit changes to branch
+        if: steps.check_should_commit.outputs.should_commit == 'true'
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: |
+            ${{ github.event.head_commit.message }}
+
+            DiffTrain build for commit https://github.com/facebook/react/commit/${{ github.sha }}.
+          branch: builds/facebook-fbsource
+          commit_user_name: ${{ github.actor }}
+          commit_user_email: ${{ github.actor }}@users.noreply.github.com
+          create_branch: true