[skip ci] Exit when noghing updated

cocoatomo · cocoatomo · commit 15bdc87304a9 · 2020-05-12T19:46:15.000+09:00
diff --git a/.github/workflows/pr_build.yml b/.github/workflows/pr_build.yml
@@ -64,5 +64,6 @@ jobs:
         git config --local user.name "Autobuild bot on GitHub Actions"
         git config --local user.email "githubaction-build-bot@example.com"
         git add .
+        if [ $(git status -s | wc -l) -eq 0 ]; then echo "nothing to commit"; exit 0; fi
         git commit -m 'update html'
         git push "https://${{ github.token }}@github.com/${{ github.repository }}.git" gh-pages:gh-pages
