Github Actions自动合并PR报错：GITHUB_TOKEN未设置

我在编写Pull Request创建时自动合并的Github Actions工作流，遇到报错：

2023-02-19T02:09:08.581Z ERROR environment variable GITHUB_TOKEN not set!

已在仓库设置页面配置了Token，但问题依旧。原工作流代码如下：

name: CI/CD 

on: 
  pull_request: 
    branches: [ master ]  
    
jobs: 
  super-linter:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Super-Linter
        uses: github/super-linter@v4.10.1
        with:    
          files: ${{ join(github.event.pull_request.changed_files, ',') }}
          
  Merge:       
    runs-on: ubuntu-latest       
    needs: super-linter
    steps:   
      - name: Checkout Code 
        uses: actions/checkout@v2 
      - name: Merge pull requests 
        uses: pascalgn/automerge-action@v0.14.1   
        with: 
          GITHUB_TOKEN: ${{ secrets.TOKEN }}
      
        
  deploy: 
    runs-on: self-hosted   
    needs: Merge
    steps: 
      #- uses: actions/checkout@v2  #this is used for if you want to push all source code into runner       
      - name: update code base 
        working-directory: /test_pipe/www/html 
        run: sudo git pull origin master        
      - name: restart   
        working-directory: /test_pipe/www/html
        run: sudo systemctl restart nginx  

排查与修复方案 #

• 修正Token传递方式：pascalgn/automerge-action优先读取环境变量而非with字段参数，需将Token通过env传入：

  - name: Merge pull requests 
    uses: pascalgn/automerge-action@v0.14.1   
    env:
      GITHUB_TOKEN: ${{ secrets.TOKEN }}
  

• 验证Secret名称匹配：确认仓库Settings > Secrets and variables > Actions中创建的Secret名称确实是TOKEN，且该Token拥有repo权限（可读写PR及代码）。

• 检查Token权限：自定义Token需授予repo:status、public_repo（公仓）或repo（私有仓）权限，且对应账号有合并PR到master分支的权限。

• 升级Action版本：v0.14.1版本较旧，建议升级到最新稳定版，避免参数读取兼容性问题。

修改后的工作流示例 #

name: CI/CD 

on: 
  pull_request: 
    branches: [ master ]  
    
jobs: 
  super-linter:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Super-Linter
        uses: github/super-linter@v4.10.1
        with:    
          files: ${{ join(github.event.pull_request.changed_files, ',') }}
          
  Merge:       
    runs-on: ubuntu-latest       
    needs: super-linter
    steps:   
      - name: Checkout Code 
        uses: actions/checkout@v2 
      - name: Merge pull requests 
        uses: pascalgn/automerge-action@v0.14.1   
        env:
          GITHUB_TOKEN: ${{ secrets.TOKEN }}
      
        
  deploy: 
    runs-on: self-hosted   
    needs: Merge
    steps: 
      - name: update code base 
        working-directory: /test_pipe/www/html 
        run: sudo git pull origin master        
      - name: restart   
        working-directory: /test_pipe/www/html
        run: sudo systemctl restart nginx  

内容的提问来源于stack exchange，提问作者Andrew Bao-Viet Nguyen