如何设置每个作业而不是工作流的事件触发器？

Question

让我们以包含两个任务的工作流为例--构建和注释

name: TestWorkflow

on:  
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:
    runs-on: self-hosted
    steps:
      - uses: actions/checkout@v2
      - name: Build code
        run: |
          whoami
          ./build
  comment:
    runs-on: self-hosted
    needs: build
    steps:
      - uses: actions/github-script@v3
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            github.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: 'Test comment'
            })

此工作流将在推送和打开对主分支的拉请求时触发。但是，虽然构建总是成功的，但在push场景中，评论作业将失败，因为没有对其进行评论的拉请求。

是否可以指定每个作业而不是每个工作流的触发器？类似于：

name: TestWorkflow2

jobs:
  build:
    on:  
      push:
        branches: [ master ]
      pull_request:
        branches: [ master ]
    ...
  comment:
    on:  
      pull_request:
        branches: [ master ]
    ...

Answer 1

除非满足条件，否则可以使用if条件(参考)防止作业或步骤运行。

例如，在这里，只有在触发工作流的事件是if: ${{ github.event_name == 'pull_request' }}的情况下，才可以向comment job中添加pull_request来执行它。

  comment:
    runs-on: self-hosted
    needs: build
    if: ${{ github.event_name == 'pull_request' }}
    steps:
       [...]