如何从GitHub PR标题提取版本号更新Android应用versionName？

核心需求实现步骤 #

1. 调整流水线触发条件
   由于版本号来源于合并到master的PR标题，建议将触发条件改为PR合并事件，确保只有正式发布的PR才会触发部署：

   on:
     pull_request:
       branches: [ master ]
       types: [ closed ]
     push:
       branches: [ master ] # 保留原push触发，兼容直接推送场景
   

2. 从PR标题提取versionName
   添加shell步骤，通过正则匹配提取标题中的版本号，并将其存入环境变量供后续步骤使用：

   - name: Extract versionName from PR title
     run: |
       # 匹配"Android App Release Vx.x.x"格式的标题，提取x.x.x部分
       VERSION_NAME=$(echo "${{ github.event.pull_request.title }}" | sed -n 's/^Android App Release V\([0-9]\+\.[0-9]\+\.[0-9]\+\)$/\1/p')
       echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
     if: github.event.pull_request.merged == true # 仅当PR合并时执行
   

3. 同时更新versionCode和versionName
   修改现有的android-version-actions步骤，加入versionName参数，使用提取到的环境变量更新Gradle配置：

   - name: Bump version code and name
     uses: chkfung/android-version-actions@v1.2
     with:
       gradlePath: app/build.gradle.kts
       versionCode: ${{ github.run_number }}
       versionName: ${{ env.VERSION_NAME }}
     if: github.event.pull_request.merged == true || github.event_name == 'push'
   

完整修改后的流水线配置 #

name: Android CD Pipeline

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

jobs:
  build:
    name: Deploy Android App
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set Up JDK 18
        uses: actions/setup-java@v3
        with:
          java-version: '18'
          distribution: 'temurin'

      - name: Extract versionName from PR title
        run: |
          VERSION_NAME=$(echo "${{ github.event.pull_request.title }}" | sed -n 's/^Android App Release V\([0-9]\+\.[0-9]\+\.[0-9]\+\)$/\1/p')
          echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
        if: github.event.pull_request.merged == true

      - name: Bump version code and name
        uses: chkfung/android-version-actions@v1.2
        with:
          gradlePath: app/build.gradle.kts
          versionCode: ${{ github.run_number }}
          versionName: ${{ env.VERSION_NAME }}
        if: github.event.pull_request.merged == true || github.event_name == 'push'

关键说明 #

• 正则表达式^Android App Release V\([0-9]\+\.[0-9]\+\.[0-9]\+\)$严格匹配指定的PR标题格式，确保只提取合法的版本号。
• 通过$GITHUB_ENV存储版本号，实现步骤间的变量传递。
• 条件判断确保仅在PR合并或直接推送master时执行版本更新，避免无效触发。

内容的提问来源于stack exchange，提问作者Swapnil Musale