Auto increment version number on release build.

目标

希望每次CI build 后versionCode 会自动+1， build number 会自动+1

实现

在这里所有的版本信息通过外部文件version.properties得到。version.properties 放在app目录下，如果app有多个flavor就放在每个flavor对应的目录下下。

app
  - src
      - flavor1
         - version.properties
      - flavor2
         - version.properties
  - version.gradle

version.properties 文件

VERSION_MAJOR=1
VERSION_MINOR=0
VERSION_PATCH=0
VERSION_BUILD=0
VERSION_NAME=1.0.0.0
VERSION_CODE=10000

version.gradle

新建一个version.gradle文件，该文件放在App 根目录下

import java.util.regex.Matcher
import java.util.regex.Pattern

android {
    def versionMajor = 1
    def versionMinor = 0
    def versionPatch = 0
    def versionBuild = 0
    def versionFileName = "version.properties";
    def versionPropsFile
    def releaseTaskName

    //Initialize versionPropsFile name & releaseTaskName
    Gradle gradle = getGradle()
    println(gradle.getStartParameter().getTaskRequests().toString())
    Pattern pattern = Pattern.compile("assemble(\\w+)(Release|Debug)");

    Matcher matcher = pattern.matcher(gradle.getStartParameter().getTaskRequests().toString());
    //Get current flavor name
    if (matcher.find()) {
        def flavor = matcher.group(1).toLowerCase();
        versionPropsFile = file("src/${flavor}/${versionFileName}")
        releaseTaskName = "assemble${matcher.group(1)}Release"
    } else {
        println "NO MATCH FOUND"
    }

    /*Setting default value for versionBuild which is the last incremented value stored in the file */
    if (versionPropsFile != null && versionPropsFile.canRead()) {
        def Properties versionProps = new Properties()
        versionProps.load(new FileInputStream(versionPropsFile))
        versionMajor = versionProps.getProperty('VERSION_MAJOR', '1').toInteger()
        versionMinor = versionProps.getProperty('VERSION_MINOR', '0').toInteger()
        versionPatch = versionProps.getProperty('VERSION_PATCH', '0').toInteger()
        versionBuild = versionProps.getProperty('VERSION_BUILD', '0').toInteger()
        project.ext.versionCode = versionMajor * 10000 + versionMinor * 1000 + versionPatch * 100 + versionBuild
        project.ext.versionName = "${versionMajor}.${versionMinor}.${versionPatch}.${versionBuild}"
        println '--------Building----------'
        println 'PropsFile: ' + versionPropsFile.toString()
        println 'versionMajor ' + versionMajor.toString()
        println 'versionMinor ' + versionMinor.toString()
        println 'versionPatch ' + versionPatch.toString()
        println 'Version Code: ' + project.ext.versionCode.toString()
        println 'Version Name: ' + project.ext.versionName
        println '---------------------------'
    } else {
        throw new GradleException("Could not read version.properties!")
    }
    /*
     * VersionCode : versionMajor * 10000 + versionMinor * 1000 + versionPatch * 100 + versionBuild
     * VersionName : "${versionMajor}.${versionMinor}.${versionPatch}.${versionBuild}"
     * versionBuild: Auto increment (+1) every Jenkins release build
     * Reset version build to 0 if any of versionMajor, versionMinor or versionPatch changed.
     */

    println 'releaseTaskName ' + releaseTaskName
    //ci == true, 只有CI release build 时才做+1操作
    if (ci) {
        def runTasks = gradle.startParameter.taskNames
        if (releaseTaskName in runTasks) {
            if (versionPropsFile != null && versionPropsFile.canRead()) {
                def Properties versionProps = new Properties()
                versionProps.load(new FileInputStream(versionPropsFile))
                versionBuild = versionBuild + 1
                project.ext.versionCode =
                        versionMajor * 10000 + versionMinor * 1000 + versionPatch * 100 + versionBuild
                project.ext.versionName = "${versionMajor}.${versionMinor}.${versionPatch}.${versionBuild}"
                versionProps.setProperty('VERSION_MAJOR', versionMajor.toString())
                versionProps.setProperty('VERSION_MINOR', versionMinor.toString())
                versionProps.setProperty('VERSION_PATCH', versionPatch.toString())
                versionProps.setProperty('VERSION_BUILD', versionBuild.toString())
                versionProps.setProperty('VERSION_CODE', project.ext.versionCode.toString())
                versionProps.setProperty('VERSION_NAME', project.ext.versionName)
                versionProps.store(versionPropsFile.newWriter(), null)
                println '--------Building----------'
                println 'Version Code: ' + project.ext.versionCode.toString()
                println 'Version Name: ' + project.ext.versionName
                println '---------------------------'
            } else {
                throw new GradleException("Could not read version.properties!")
            }
        }
    }
}

修改 root 的build.gradle

增加以下代码，用于判断是否是CI build

ext {
 //'CI' environment variables is set in CI(eg. Jenkins) configuration page
 ci = 'true'.equals(System.getenv('CI'))
}

修改 app 的build.gradle

增加一行 apply from: 'version.gradle'

apply plugin: 'com.android.application'
apply from: 'version.gradle'

结果

CI release build 后，版本号为

--------Building----------
Version Code: 10001
Version Name: 1.0.0.1
---------------------------