如何在生成下一个apk时自动递增version_code？

android {
    defaultConfig {
        // 初始versionCode
        def initialVersionCode = 1
        // 自定义versionCode变量
        def versionCode = initialVersionCode

        // 在每次构建时自动递增versionCode
        applicationVariants.all { variant ->
            variant.outputs.all { output ->
                output.versionCodeOverride = versionCode
                // 递增versionCode
                versionCode++
            }
        }
    }
}

#!/bin/bash

# 获取当前versionCode
currentVersionCode=$(grep "versionCode" app/build.gradle | grep -oE '[0-9]+')

# 递增versionCode
nextVersionCode=$((currentVersionCode + 1))

# 替换app/build.gradle中的versionCode
sed -i "s/versionCode $currentVersionCode/versionCode $nextVersionCode/" app/build.gradle

# 生成apk
./gradlew assembleDebug