Github Actionsのスクリプトでgit commitする時に更新がなかった場合エラー(Process completed with exit code 1.)が出る問題の対処法

例えば下記の様なスクリプトがあった場合、何もgitレポに更新がないと、git commit -m "By Yamada Taro"だけだとProcess completed with exit code 1.が出てしまう。

エラーが出て見栄えが悪いだけで、別になんの問題もないようですが、

git commit -m "By Yamada Taro" || echo "No changes to commit"

と、||でエラーをキャッチしてあげることで、エラーが記録されなくなりサッパリとします。

# This is a basic workflow to help you get started with Actions

name: 適当な名前

# Controls when the action will run. Triggers the workflow on push or pull request
# events but only for the master branch
on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:

    - uses: actions/checkout@v2

    - name: Cache node modules
      uses: actions/cache@v1
      env:
        cache-name: cache-node-modules
      with:
        # npm cache files are stored in `~/.npm` on Linux/macOS
        path: ~/.npm
        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
          ${{ runner.os }}-build-${{ env.cache-name }}-
          ${{ runner.os }}-build-
          ${{ runner.os }}-

    - name: Install NPM dependencies
      run: npm install

    - name: Run Script
      run: npm run dosomething

    - name: Push any changes to the Git repo
      run: |
        git config user.email "[e-mail]"
        git config user.name "山田太郎"
        git push origin HEAD:master
        git add .
        git commit -m "By Yamada Taro" || echo "No changes to commit"
        git push

参考にしたページ：How to let Jenkins git commit only if there are changes?