#!groovy

def dockerVersions = ['19.03.5', '18.09.9']
def baseImages = ['alpine', 'debian']
def pythonVersions = ['py27', 'py37']

pipeline {
    agent none

    options {
        skipDefaultCheckout(true)
        buildDiscarder(logRotator(daysToKeepStr: '30'))
        timeout(time: 2, unit: 'HOURS')
        timestamps()
    }

    stages {
        stage('Build test images') {
            // TODO use declarative 1.5.0 `matrix` once available on CI
            parallel {
                stage('alpine') {
                    agent {
                        label 'ubuntu && amd64 && !zfs'
                    }
                    steps {
                        buildImage('alpine')
                    }
                }
                stage('debian') {
                    agent {
                        label 'ubuntu && amd64 && !zfs'
                    }
                    steps {
                        buildImage('debian')
                    }
                }
            }
        }
        stage('Test') {
            steps {
                // TODO use declarative 1.5.0 `matrix` once available on CI
                script {
                    def testMatrix = [:]
                    baseImages.each { baseImage ->
                      dockerVersions.each { dockerVersion ->
                        pythonVersions.each { pythonVersion ->
                          testMatrix["${baseImage}_${dockerVersion}_${pythonVersion}"] = runTests(dockerVersion, pythonVersion, baseImage)
                        }
                      }
                    }

                    parallel testMatrix
                }
            }
        }
    }
}


def buildImage(baseImage) {
    def scmvar = checkout(scm)
    def imageName = "dockerbuildbot/compose:${baseImage}-${scmvar.GIT_COMMIT}"
    image = docker.image(imageName)

    withDockerRegistry(credentialsId:'dockerbuildbot-index.docker.io') {
        try {
            image.pull()
        } catch (Exception exc) {
            ansiColor('xterm') {
                sh """docker build -t ${imageName} \\
                    --target build \\
                    --build-arg BUILD_PLATFORM="${baseImage}" \\
                    --build-arg GIT_COMMIT="${scmvar.GIT_COMMIT}" \\
                    .\\
                """
                sh "docker push ${imageName}"
            }
            echo "${imageName}"
            return imageName
        }
    }
}

def runTests(dockerVersion, pythonVersion, baseImage) {
    return {
        stage("python=${pythonVersion} docker=${dockerVersion} ${baseImage}") {
            node("ubuntu && amd64 && !zfs") {
                def scmvar = checkout(scm)
                def imageName = "dockerbuildbot/compose:${baseImage}-${scmvar.GIT_COMMIT}"
                def storageDriver = sh(script: "docker info -f \'{{.Driver}}\'", returnStdout: true).trim()
                echo "Using local system's storage driver: ${storageDriver}"
                withDockerRegistry(credentialsId:'dockerbuildbot-index.docker.io') {
                    sh """docker run \\
                      -t \\
                      --rm \\
                      --privileged \\
                      --volume="\$(pwd)/.git:/code/.git" \\
                      --volume="/var/run/docker.sock:/var/run/docker.sock" \\
                      -e "TAG=${imageName}" \\
                      -e "STORAGE_DRIVER=${storageDriver}" \\
                      -e "DOCKER_VERSIONS=${dockerVersion}" \\
                      -e "BUILD_NUMBER=${env.BUILD_NUMBER}" \\
                      -e "PY_TEST_VERSIONS=${pythonVersion}" \\
                      --entrypoint="script/test/ci" \\
                      ${imageName} \\
                      --verbose
                    """
                }
            }
        }
    }
}