gradle 项目输出当前版本信息用于打包

gitversioning.gradle

buildscript {
        repositories {
                jcenter()
                mavenCentral()
        }
        dependencies {
                classpath 'org.eclipse.jgit:org.eclipse.jgit:4.1.1.201511131810-r'
        }
}

import org.eclipse.jgit.api.Git
import org.eclipse.jgit.internal.storage.file.FileRepository
import java.util.regex.Matcher

def gitVersionName(project) {
    File gitDir = new File(project.rootDir, '.git')
    if (!gitDir.exists()) {
        throw new IllegalArgumentException('Cannot find \'.git\' directory')
    }
    try {
        Git git = Git.wrap(new FileRepository(gitDir))
        String version = git.describe().call() ?: 'unspecified'
        boolean isClean = git.status().call().isClean()
        return version + (isClean ? '' : '')
    } catch (Throwable t) {
        return 'unspecified'
    }
}

def gitVersionCode(project) {
    def r = /v(\d+)\.(\d+)\.(\d+)(-.*)?/
    String versionName = gitVersionName(project)
    Matcher m = versionName =~ r

    if (m.matches()) {
        int major = m.group(1).toInteger()
        int minor = m.group(2).toInteger()
        int patch = m.group(3).toInteger()
        return major * 1000000 + minor * 1000 + patch
    } else {
        throw new IllegalArgumentException('versionName: ' + versionName + ' cannot be convert to versioncode')
    }

}

ext{
	gitVersionName = this.&gitVersionName
	gitVersionCode = this.&gitVersionCode
}

use.gradle

apply from: 'gitversioning.gradle'
version = gitVersionName(project)