#2378: ci: post comment with clang-format output

Author: cz4rs

.github/workflows/run-clang-format.yml

@@ -12,5 +12,19 @@ jobs:
           fetch-depth: 0
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Run clang-format
-        shell: bash
-        run: git clang-format-16 --diff ${{ github.base_ref }}
+        run: |
+          # use `EOF` as delimiter to capture multiline output
+          {
+            echo 'CLANG_FORMAT_DIFF<<EOF
+            git clang-format-16 --diff origin/${{ github.base_ref }}
+            echo EOF
+          } >> $GITHUB_ENV
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            octokit.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: $CLANG_FORMAT_DIFF
+            })