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#!/usr/bin/env groovy
// Copyright (C) 2019 VyOS maintainers and contributors
//
// This program is free software; you can redistribute it and/or modify
// in order to easy exprort images built to "external" world
// it under the terms of the GNU General Public License version 2 or later as
// published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

@NonCPS

def getGitBranchName() {
    def branch = scm.branches[0].name
    return branch.split('/')[-1]
}

def getGitRepoURL() {
    return scm.userRemoteConfigs[0].url
}

def getGitRepoName() {
    return getGitRepoURL().split('/').last()
}

// Returns true if this is a custom build launched on any project fork.
// Returns false if this is build from git@github.com:vyos/<reponame>.
// <reponame> can be e.g. vyos-1x.git or vyatta-op.git
def isCustomBuild() {
    // GitHub organisation base URL
    def gitURI = 'git@github.com:vyos/' + getGitRepoName()
    def httpURI = 'https://github.com/vyos/' + getGitRepoName()

    return ! ((getGitRepoURL() == gitURI) || (getGitRepoURL() == httpURI))
}

def setDescription() {
    def item = Jenkins.instance.getItemByFullName(env.JOB_NAME)

    // build up the main description text
    def description = ""
    description += "<h2>Build VyOS ISO image</h2>"

    if (isCustomBuild()) {
        description += "<p style='border: 3px dashed red; width: 50%;'>"
        description += "<b>Build not started from official Git repository!</b><br>"
        description += "<br>"
        description += "Repository: <font face = 'courier'>" + getGitRepoURL() + "</font><br>"
        description += "Branch: <font face = 'courier'>" + getGitBranchName() + "</font><br>"
        description += "</p>"
    } else {
        description += "Sources taken from Git branch: <font face = 'courier'>" + getGitBranchName() + "</font><br>"
    }

    item.setDescription(description)
    item.save()
}

// Only keep the 10 most recent builds
def projectProperties = [
    [$class: 'BuildDiscarderProperty',strategy: [$class: 'LogRotator', numToKeepStr: '10']],
]

properties(projectProperties)
setDescription()

// Due to long build times on DockerHub we rather build the container by ourself
// and publish it later on.
node('Docker') {
    stage('Build Container') {
        script {
            git branch: getGitBranchName(),
                url: getGitRepoURL()

            // create container name on demand
            env.DOCKER_IMAGE = "vyos/vyos-build:" + getGitBranchName()
            sh "docker build -t ${env.DOCKER_IMAGE} docker"
            withDockerRegistry([credentialsId: "DockerHub"]) {
                sh "docker push ${env.DOCKER_IMAGE}"
            }
        }
    }
}

pipeline {
    options {
        skipDefaultCheckout()
        disableConcurrentBuilds()
        timeout(time: 90, unit: 'MINUTES')
        parallelsAlwaysFailFast()
        timestamps()
    }
    triggers {
        cron('H 2 * * *')
    }
    agent {
        dockerfile {
            filename 'Dockerfile'
            dir 'docker'
            args '--privileged --sysctl net.ipv6.conf.lo.disable_ipv6=0 -e GOSU_UID=1006 -e GOSU_GID=1006'
        }
    }
    stages {
        stage('Build ISO') {
            steps {
                script {
                    def commitId = sh(returnStdout: true, script: 'git rev-parse --short=11 HEAD').trim()
                    currentBuild.description = sprintf('Git SHA1: %s', commitId[-11..-1])

                    sh """
                        ./configure \
                            --build-by autobuild@vyos.net \
                            --debian-mirror http://ftp.us.debian.org/debian/ \
                            --build-type release \
                            --version 1.2-crux-\$(date +%Y%m%d%H%M)
                        sudo make iso
                    """

                    if (fileExists('build/live-image-amd64.hybrid.iso') == false) {
                        error('ISO build error')
                    }
                }
            }
        }
    }
    post {
        cleanup {
            echo 'One way or another, I have finished'
            // the 'build' directory got elevated permissions during the build
            // cdjust permissions so it can be cleaned up by the regular user
            sh '''
                #!/bin/bash
                if [ -d build ]; then
                    sudo chmod -R 777 build/
                fi
            '''
            deleteDir() /* cleanup our workspace */
        }
    }
}