如何在GitHub Actions中跳过matrix矩阵的macOS x86指定配置

你可以通过两种方式实现跳过 macOS x86 架构的构建任务，优先推荐第一种矩阵排除方案：

方法一：在构建矩阵中添加 exclude 规则（推荐） #

直接在 strategy.matrix 配置中加入排除项，GitHub Actions 会直接不生成该组合的任务，不会占用 runner 资源，是性能最优的方案。
修改后的配置如下：

build-and-push-native-libraries:
  name: Build and push native library on ${{ matrix.os }} ${{ matrix.architecture }}
  strategy:
    fail-fast: true
    matrix:
      os: [ubuntu-latest, macOS, windows-latest]
      java: [15]
      architecture: [x86, x64]
      include:
        - compiler: gcc
          gcc: 8
      # 新增排除规则
      exclude:
        - os: macOS
          architecture: x86
  runs-on: ${{ matrix.os }}
  steps:
    - name: Set up JDK ${{ matrix.java }}
      uses: actions/setup-java@v1
      with:
        java-version: ${{ matrix.java }}
        architecture: ${{ matrix.architecture }}
    - uses: actions/checkout@v2
    - if: startsWith(matrix.os, 'ubuntu') == true
      name: Change the permissions of the build script of external classes
      run: chmod +x ./java/src/main/resources/compileExternalClasses.sh
    - name: Build and push native library
      run: |
        mvn -B clean package -DskipTests=true --file ./native/pom.xml
        git config user.name "${{ github.event.head_commit.committer.name }}"
        git config user.email "${{ github.event.head_commit.committer.email }}"
        git pull origin experimental
        git commit -am "Generated library for ${{ matrix.os }} ${{ matrix.architecture }}" --allow-empty
        git push

方法二：给任务添加 if 跳过条件 #

如果不想修改矩阵配置，也可以直接给整个任务添加执行条件，匹配到 macOS x86 组合时直接跳过整个任务：
在 runs-on 字段上方添加如下 if 判断即可：

build-and-push-native-libraries:
  name: Build and push native library on ${{ matrix.os }} ${{ matrix.architecture }}
  strategy:
    fail-fast: true
    matrix:
      os: [ubuntu-latest, macOS, windows-latest]
      java: [15]
      architecture: [x86, x64]
      include:
        - compiler: gcc
          gcc: 8
  # 新增跳过条件
  if: ${{ !(matrix.os == 'macOS' && matrix.architecture == 'x86') }}
  runs-on: ${{ matrix.os }}
  # 后续steps配置保持不变

该方案的区别是 macOS x86 的任务还是会被创建，只是直接标记为跳过状态，适合临时测试时快速禁用某类任务使用。

内容的提问来源于stack exchange，提问作者JJB