如何让被调用的GitHub可复用Workflow仅在手动触发时运行？

要实现可复用Workflow仅在手动触发时运行，即使被其他Workflow调用也不执行，核心是通过判断触发事件类型控制job的执行逻辑，具体实现如下：

修改可复用Workflow #

在可复用Workflow的job中添加条件判断，仅当触发事件为workflow_dispatch（手动触发）时才执行核心逻辑：

name: Reusable Workflow
on:
  workflow_call:
    secrets:
      secret_1:
        description: "The Environment secret for secret_1"
        required: true
  workflow_dispatch:
    inputs:
      test_choice:
        type: choice
        description: "Select a choice"
        required: true
        options: 
          - Test1
          - Test2
          - Test3

env:
  GITHUB_RUN_ID: $GITHUB_RUN_ID

jobs:
  log-the-inputs:
    runs-on: ubuntu-latest
    # 仅允许手动触发时执行此job
    if: github.event_name == 'workflow_dispatch'
    steps:
      - run: |
          echo "Choice: $choice"
          echo "Secret: $secret"
          echo "GitHub Run ID: $GITHUB_RUN_ID"
        env:
          choice: ${{ inputs.test_choice }}
          secret: ${{ secrets.secret_1 }}

逻辑说明 #

• 当通过workflow_call调用该Workflow时，触发事件类型为workflow_call，此时if条件不满足，核心job会直接跳过，不会因缺少test_choice参数报错。
• 只有通过手动触发（workflow_dispatch）时，if条件成立，job才会正常执行，此时test_choice是必填项，能保证输入有效。

如果需要在被调用时给出明确提示，可额外添加一个仅在workflow_call触发时运行的提示job：

jobs:
  call-not-supported:
    runs-on: ubuntu-latest
    if: github.event_name == 'workflow_call'
    steps:
      - run: echo "此Workflow仅支持通过workflow_dispatch手动触发，不支持workflow_call调用。"
  log-the-inputs:
    runs-on: ubuntu-latest
    if: github.event_name == 'workflow_dispatch'
    steps:
      - run: |
          echo "Choice: $choice"
          echo "Secret: $secret"
          echo "GitHub Run ID: $GITHUB_RUN_ID"
        env:
          choice: ${{ inputs.test_choice }}
          secret: ${{ secrets.secret_1 }}

内容的提问来源于stack exchange，提问作者KrisM4c