Git学习-->关于Jenkins编译时候，如何获取Git分支的当前分支名？
2017-09-02 18:02
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一、背景
因为代码都迁移到了Gitlab，所以Jenkins编译的时候我们都需要将之前的SVN信息换成现在的Git信息。最近编译一个Lib库的时候，因为团队规定上传Release版本的AAR到Maven的话，必须需要在Jenkins上编译而且Git Branch 必须是master分支才能够上传到Maven。因此我们就需要在Gradle脚本中，获取Git Branch ,Git Commit等相关信息。但是在获取Git Branch的时候出现了问题，在本地Android Studio编译的时候能够获取到Git Branch的名字，但是使用Jenkins编译的时候，一直获取不到信息。
下面是我写的一份gradle文件，用于获取Git和Jenkins的相关信息
/**
* 获取Git 分支名
*/
def getGitBranch() {
return 'git symbolic-ref --short -q HEAD'.execute().text.trim()
}
/**
* 获取Git 版本号
*/
def getGitSHA() {
return 'git rev-parse --short HEAD'.execute().text.trim()
}
/**
* 获取Git Tag
*/
def getGitTag() {
return 'git describe --tags'.execute([], project.rootDir).text.trim()
}
/**
* 获取Git 提交次数
*/
def getGitCommitCount() {
return 100 + Interger.parse('git rev-list --count HEAD'.execute([], project.rootDir).text.trim())
}
/**
* 判断是否有jenkins
*/
boolean isInJenkins() {
Map<String, String> map = System.getenv()
if (map == null) {
return false
}
String str = map.get("Path")
if (str != null) {
//it's windows
return false
} else {
str = ""
Iterator it = map.iterator()
while (it.hasNext()) {
str += it.next()
}
return str.contains("jenkins")
}
}
/**
* 获取jenkins任务名
*/
def getJenkinsName() {
boolean flag = isInJenkins()
if (flag) {
ext.env = System.getenv()
ext.name = env.JOB_URL
String[] stringArray = ext.name.split("/")
if (stringArray.length > 0) {
return stringArray[stringArray.length - 1]
} else {
return "Local"
}
} else {
return "Local"
}
}
/**
* 获取Jenkins Build 号
* @return
*/
def getJenkinsBuildCode() {
boolean flag = isInJenkins()
if (flag) {
ext.env = System.getenv()
ext.buildNumber = env.BUILD_NUMBER?.toInteger()
return "$buildNumber"
} else {
return 0
}
}
/**
* 定义几个变量，在build.gradle里面引用
*/
ext {
gitTag = getGitTag()
gitBranch = getGitBranch()
gitSHA = getGitSHA()
jenkinsRevision = getJenkinsBuildCode()
jenkinsName = getJenkinsName()
}其中的方法，getGitBranch方法在Android Studio编译的时候，能够正常获取到Git分支名。
println "pom_version_type = " + pom_version_type println "jenkinsName = " + jenkinsName println "gitBranch = " + gitBranch
我在进行编译的时候，是会通过如上代码打印出Git Branch的信息。
在Android Studio 本地编译的时候，是可以打印出相关的信息的。
但是在Jenkins编译的时候，是不能够上传的，如下所示：
二、解决方法
后来我尝试找了很多种方法去获取Git Branch的名字，在Android Studio本地都可以获取到，如下所示：参考链接：https://stackoverflow.com/questions/6245570/how-to-get-the-current-branch-name-in-git
方法1、
git symbolic-ref --short -q HEAD
D:\GitLab Source\XTCLint>git symbolic-ref --short -q HEAD master D:\GitLab Source\XTCLint>
方法2、
git rev-parse --abbrev-ref HEAD
D:\GitLab Source\XTCLint>git rev-parse --abbrev-ref HEAD master
方法3、
git branch | grep \* | cut -d ' ' -f2
D:\GitLab Source\XTCLint>git branch | grep \* | cut -d ' ' -f2 master
方法4、
git symbolic-ref HEAD | sed -e "s/^refs\/heads\///"
D:\GitLab Source\XTCLint>git symbolic-ref HEAD | sed -e "s/^refs\/heads\///" master
以上所有的方法，仅仅在Android Studio的终端或者本地gradle代码中有效，然而在Jenkins服务器编译的时候都是获取为空。
后来我查看了Jenkins的Git插件上的介绍，参考链接：https://wiki.jenkins.io/display/JENKINS/Git+Plugin
如上所示，在上面的链接中有介绍，有几个Environment variables环境变量可以使用。
Environment variables
The git plugin sets several environment variables you can use in your scripts:
GIT_COMMIT - SHA of the current
GIT_BRANCH - Name of the remote repository (defaults to origin), followed by name of the branch currently being used, e.g. “origin/master” or “origin/foo”
GIT_LOCAL_BRANCH - Name of the branch on Jenkins. When the “checkout to specific local branch” behavior is configured, the variable is published. If the behavior is configured as null or **, the property will contain the resulting local branch name sans the remote name.
GIT_PREVIOUS_COMMIT - SHA of the previous built commit from the same branch (the current SHA on first build in branch)
GIT_PREVIOUS_SUCCESSFUL_COMMIT - SHA of the previous successfully built commit from the same branch.
GIT_URL - Repository remote URL
GIT_URL_N - Repository remote URLs when there are more than 1 remotes, e.g. GIT_URL_1, GIT_URL_2
GIT_AUTHOR_NAME and GIT_COMMITTER_NAME - The name entered if the “Custom user name/e-mail address” behaviour is enabled; falls back to the value entered in the Jenkins system config under “Global Config user.name Value” (if any)
GIT_AUTHOR_EMAIL and GIT_COMMITTER_EMAIL - The email entered if the “Custom user name/e-mail address” behaviour is enabled; falls back to the value entered in the Jenkins system config under “Global Config user.email Value” (if any)
然后我将这几个变量，在一个app的Jenkins任务中，编译完成后的邮件内容中添加了这几个变量的内容，如下所示：
在构建后的操作中，Editable Email Notification的邮件通知中，将邮件内容改为如下所示的代码。
$DEFAULT_CONTENT
<br />
<font color="#0B610B">单元测试</font>
<li>Launcher单元测试报告 ：<a href="${BUILD_URL}testReport">点击查看测试报告</a></li>
<li>Launcher代码覆盖率 ：<a href="${BUILD_URL}jacoco">点击查看代码覆盖率</a></li>
<li>Launcher Android Lint ：<a href="${BUILD_URL}androidLintResult">点击查看Android Lint</a></li>
<br />
<li>GIT_COMMIT ：${GIT_COMMIT}</a></li>
<li>GIT_BRANCH ：${GIT_BRANCH}</a></li>
<li>GIT_LOCAL_BRANCH ：${GIT_LOCAL_BRANCH}</a></li>
<li>GIT_PREVIOUS_COMMIT ：${GIT_PREVIOUS_COMMIT}</a></li>
<li>GIT_PREVIOUS_SUCCESSFUL_COMMIT ：${GIT_PREVIOUS_SUCCESSFUL_COMMIT}</a></li>
<li>GIT_URL ：${GIT_URL}</a></li>
<li>GIT_URL_N ：${GIT_URL_N}</a></li>
<li>GIT_AUTHOR_NAME ：${GIT_AUTHOR_NAME}</a></li>
<li>GIT_COMMITTER_NAME ：${GIT_COMMITTER_NAME}</a></li>
<li>GIT_AUTHOR_EMAIL ：${GIT_AUTHOR_EMAIL}</a></li>
<li> GIT_COMMITTER_EMAIL ：${ GIT_COMMITTER_EMAIL}</a></li>这样编译完后，收到的邮件内容如下：
如上所示，收到的邮件内容包含了Git的相关信息：
GIT_COMMIT ：118fa74e6a09c8c5ae713523692add256bfa6afb
GIT_BRANCH ：origin/feature/UseByAnonymousDBMigrateAndApiChange
GIT_LOCAL_BRANCH ：${GIT_LOCAL_BRANCH}
GIT_PREVIOUS_COMMIT ：118fa74e6a09c8c5ae713523692add256bfa6afb
GIT_PREVIOUS_SUCCESSFUL_COMMIT ：118fa74e6a09c8c5ae713523692add256bfa6afb
GIT_URL ：git@172.28.1.116:Android/WatchApp/Third/NetEaseCloudMusic.git
GIT_URL_N ：${GIT_URL_N}
GIT_AUTHOR_NAME ：${GIT_AUTHOR_NAME}
GIT_COMMITTER_NAME ：${GIT_COMMITTER_NAME}
GIT_AUTHOR_EMAIL ：${GIT_AUTHOR_EMAIL}
GIT_COMMITTER_EMAIL ：${ GIT_COMMITTER_EMAIL}其中，GIT_BRANCH这个环境变量的值为origin/feature/UseByAnonymousDBMigrateAndApiChange，代表Jenkins上/UseByAnonymousDBMigrateAndApiChange分支远程Gitlab上该分支映射的远程分支。因此我们可以对GIT_BRANCH这个环境变量做做文章。
将之前gradle脚本中的getGitBranch方法，做如下修改，区分编译环境是Jenkins还是本地。环境不同，运行不同的脚本获取Git Branch的名字。当处于Jenkins环境的时候，先通过GIT_BRANCH这个环境变量获取到Jenkins拉下来的分支对应的远程分支，然后通过字符串分离，获取到分支名。
/** * 获取Git 分支名 * *参考Jenkins git 创建文档： https://wiki.jenkins.io/display/JENKINS/Git+Plugin * Environment variables The git plugin sets several environment variables you can use in your scripts: GIT_COMMIT - SHA of the current GIT_BRANCH - Name of the remote repository (defaults to origin), followed by name of the branch currently being used, e.g. "origin/master" or "origin/foo" GIT_LOCAL_BRANCH - Name of the branch on Jenkins. When the "checkout to specific local branch" behavior is configured, the variable is published. If the behavior is configured as null or **, the property will contain the resulting local branch name sans the remote name. GIT_PREVIOUS_COMMIT - SHA of the previous built commit from the same branch (the current SHA on first build in branch) GIT_PREVIOUS_SUCCESSFUL_COMMIT - SHA of the previous successfully built commit from the same branch. GIT_URL - Repository remote URL GIT_URL_N - Repository remote URLs when there are more than 1 remotes, e.g. GIT_URL_1, GIT_URL_2 GIT_AUTHOR_NAME and GIT_COMMITTER_NAME - The name entered if the "Custom user name/e-mail address" behaviour is enabled; falls back to the value entered in the Jenkins system config under "Global Config user.name Value" (if any) GIT_AUTHOR_EMAIL and GIT_COMMITTER_EMAIL - The email entered if the "Custom user name/e-mail address" behaviour is enabled; falls back to the value entered in the Jenkins system config under "Global Config user.email Value" (if any) * * */ def getGitBranch() { //判断是否处于Jenkins编译环境 boolean flag = isInJenkins() if (flag) { ext.env = System.getenv() ext.gitBranch = env.GIT_BRANCH String[] stringArray = ext.gitBranch.split("/") if (stringArray.length > 0) { return stringArray[stringArray.length - 1] } else { return "UnKnown Branch" } } else { return 'git symbolic-ref --short -q HEAD'.execute().text.trim() } }
完整代码如下所示：
/** * 获取Git 分支名 * *参考Jenkins git 创建文档： https://wiki.jenkins.io/display/JENKINS/Git+Plugin * Environment variables The git plugin sets several environment variables you can use in your scripts: GIT_COMMIT - SHA of the current GIT_BRANCH - Name of the remote repository (defaults to origin), followed by name of the branch currently being used, e.g. "origin/master" or "origin/foo" GIT_LOCAL_BRANCH - Name of the branch on Jenkins. When the "checkout to specific local branch" behavior is configured, the variable is published. If the behavior is configured as null or **, the property will contain the resulting local branch name sans the remote name. GIT_PREVIOUS_COMMIT - SHA of the previous built commit from the same branch (the current SHA on first build in branch) GIT_PREVIOUS_SUCCESSFUL_COMMIT - SHA of the previous successfully built commit from the same branch. GIT_URL - Repository remote URL GIT_URL_N - Repository remote URLs when there are more than 1 remotes, e.g. GIT_URL_1, GIT_URL_2 GIT_AUTHOR_NAME and GIT_COMMITTER_NAME - The name entered if the "Custom user name/e-mail address" behaviour is enabled; falls back to the value entered in the Jenkins system config under "Global Config user.name Value" (if any) GIT_AUTHOR_EMAIL and GIT_COMMITTER_EMAIL - The email entered if the "Custom user name/e-mail address" behaviour is enabled; falls back to the value entered in the Jenkins system config under "Global Config user.email Value" (if any) * * */ def getGitBranch() { //判断是否处于Jenkins编译环境 boolean flag = isInJenkins() if (flag) { ext.env = System.getenv() ext.gitBranch = env.GIT_BRANCH String[] stringArray = ext.gitBranch.split("/") if (stringArray.length > 0) { return stringArray[stringArray.length - 1] } else { return "UnKnown Branch" } } else { return 'git symbolic-ref --short -q HEAD'.execute().text.trim() } }
/**
* 获取Git 版本号
*/
def getGitSHA() {
return 'git rev-parse --short HEAD'.execute().text.trim()
}
/**
* 获取Git Tag
*/
def getGitTag() {
return 'git describe --tags'.execute([], project.rootDir).text.trim()
}
/**
* 获取Git 提交次数
*/
def getGitCommitCount() {
return 100 + Interger.parse('git rev-list --count HEAD'.execute([], project.rootDir).text.trim())
}
/**
* 判断是否有jenkins
*/
boolean isInJenkins() {
Map<String, String> map = System.getenv()
if (map == null) {
return false
}
String str = map.get("Path")
if (str != null) {
//it's windows
return false
} else {
str = ""
Iterator it = map.iterator()
while (it.hasNext()) {
str += it.next()
}
return str.contains("jenkins")
}
}
/**
* 获取jenkins任务名
*/
def getJenkinsName() {
boolean flag = isInJenkins()
if (flag) {
ext.env = System.getenv()
ext.name = env.JOB_URL
String[] stringArray = ext.name.split("/")
if (stringArray.length > 0) {
return stringArray[stringArray.length - 1]
} else {
return "Local"
}
} else {
return "Local"
}
}
/**
* 获取Jenkins Build 号
* @return
*/
def getJenkinsBuildCode() {
boolean flag = isInJenkins()
if (flag) {
ext.env = System.getenv()
ext.buildNumber = env.BUILD_NUMBER?.toInteger()
return "$buildNumber"
} else {
return 0
}
}
/**
* 定义几个变量，在build.gradle里面引用
*/
ext {
gitTag = getGitTag()
gitBranch = getGitBranch()
gitSHA = getGitSHA()
jenkinsRevision = getJenkinsBuildCode()
jenkinsName = getJenkinsName()
}
现在测试下Jenkins编译是否正常，可以看到一切都正常了。
参考链接
https://wiki.jenkins.io/display/JENKINS/Git+Pluginhttps://stackoverflow.com/questions/6245570/how-to-get-the-current-branch-name-in-git
作者：欧阳鹏 欢迎转载，与人分享是进步的源泉！
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