scm检出之前的Jenkins Pipeline Git提交消息

Question

我希望能够在实际checkout scm之前在Jenkins管道中访问提交消息，因为我有巨大的存储库（> 2GB）和许多分支（> 200），并且对于每个分支，完整的存储库都会再次克隆，我想通过过滤提交消息中的显式“标签”（例如[ci] ）来限制克隆的数量。 如果您知道可以解决我问题的其他方法，请告诉我。

编辑：我正在使用脚本化的jenkinsfiles和共享库与多分支管道..所以我正在寻找一种以编程方式执行此操作的方法:)

Answer 1

由于没有其他方法，因此我执行了以下操作：

#!/usr/bin/env groovy

def getCommitMsg(branch, path_parent, path_mirror, url) {
    if (!(fileExists(path_mirror))) {
        echo "Directory $path_mirror doesn't exist, creating.."
        dir (path_parent) {
            bat("git clone --mirror $url mirror")
        }
    }
    dir (path_mirror) {
        bat("git fetch origin $branch:$branch")
        bat("git symbolic-ref HEAD refs/heads/$branch")
        return bat(script: "@git log -n 1 --pretty=format:'%%s'",
            returnStdout: true).trim().replaceAll("'","")
    }
}

def updateRepo(branch, path_parent, path_clone, url) {
    if (!(fileExists(path_clone))) {
        echo "Directory $path_clone doesn't exist, creating.."
        dir (path_parent) {
            bat("git clone --recurse-submodules $url clone")
        }
    }
    dir (path_clone) {
        bat("git pull")
    }
    dir (path_parent) {
        bat(script: "robocopy /MIR /NFL /NDL /NC /NS /NP " +
            path_clone + " " + path_parent + "\\" + branch.replaceAll("/","_"),
            returnStatus: true)
    }
}

node("some_label") {

    ws("workspace/${env.JOB_NAME}".replaceAll("%2F","_")) {

        def default_test = ["develop", "release", "feature/test"]
        def branch = env.BRANCH_NAME
        def path_current = bat(script: 'echo %CD%',
            returnStdout: true).split("\n")[2]        
        def path_parent = path_current.split("\\\\").dropRight(1).join("\\")
        def path_mirror = path_parent + "\\mirror"
        def path_clone = path_parent + "\\clone"
        def url = scm.userRemoteConfigs[0].url
        def commit = getCommitMsg(branch, path_parent, path_mirror, url)

        if (!(default_test.contains(branch)
            || commit.contains("[ci]"))) {
            echo "Branch should not be tested by default and commit message contains no [ci]-tag, aborting.."
            currentBuild.result = "FAILURE"
            return
        }

        stage("Checkout") {
            updateRepo(branch, path_parent, path_clone, url)
            checkout scm
        }

        stage("Build") {
            some stuff here
            }
        }

    }

}

这将解析镜像仓库中的提交消息，并且还减少了我的Bitbucket服务器上的带宽，因为该仓库仅在每个代理上克隆一次，然后复制到每个分支的其他目录中。 这对我来说是最有用的方法。 如果您有任何疑问，请告诉我:)

编辑：我现在解析Bitbucket REST API，代码看起来像这样：

// get commit hash
withCredentials([sshUserPrivateKey(credentialsId: 'SSH',
    keyFileVariable: 'SSHKEYFILE')]) {
    String commitHash = sh(script: """
        ssh-agent bash -c 'ssh-add ${env.SSHKEYFILE}; \
        git ls-remote ${url} refs/heads/${branch}'""",
        returnStdout: true).trim().split('\\s+')[0]

    echo("commitHash: ${commitHash}")
}

// create the curl url like this
String curlUrl = BBUrl + '/rest/api/1.0/projects/' + project + '/repos/' + repo + '/commits/' + commitHash

String commitMessage = null
withCredentials([usernameColonPassword(credentialsId: 'USERPASS',
    variable: 'USER_PASS')]) {

    String pwBase64 = "${env.USER_PASS}".bytes.encodeBase64().toString()
    String rawResponse = sh(script: """
        curl --request GET --url '${curlUrl}' \
        --header 'Authorization: Basic ${pwBase64}'""",
        returnStdout: true).trim()

    def rawMessage = readJSON(text: rawResponse)
    commitMessage = rawMessage.message
    echo("commitMessage: ${commitMessage}")
}

只需在安装了curl的Jenkins主服务器上执行此操作，希望对您有所帮助。

Answer 2

您可以使用pre-scm-buildstep插件

https://wiki.jenkins.io/display/JENKINS/pre-scm-buildstep

此插件允许构建步骤在SCM检出之前运行，以便您在工作空间上执行任何构建步骤操作（清理，添加具有SCM某些设置的文件等）或调用其他需要在检出之前运行的脚本来自SCM。

因此，基本上，您可以在SCM检出/克隆开始之前执行任何命令。