Jenkinsfile

#!groovy
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

pipeline {
    agent {
        // https://cwiki.apache.org/confluence/display/INFRA/Jenkins+node+labels
        label 'git-websites'
    }
   
    environment {
        HUGO_VERSION = '0.111.3'
        HUGO_HASH = 'b382aacb522a470455ab771d0e8296e42488d3ea4e61fe49c11c32ec7fb6ee8b'
        DEPLOY_BRANCH = 'asf-site'
    }

    stages {
        stage('Prepare') {
            steps {
                script {
                    // Capture last commit hash for final commit message
                    env.LAST_SHA = sh(script:'git log -n 1 --pretty=format:\'%H\'', returnStdout: true).trim()

                    // Download Hugo
                    env.HUGO_DIR = sh(script:'mktemp -d', returnStdout: true).trim()
                    sh "mkdir -p ${env.HUGO_DIR}/bin"
                    sh "wget --no-verbose -O ${env.HUGO_DIR}/hugo.tar.gz https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.tar.gz"
                    // Verify the checksum
                    def hugo_hash = sha256 file: "${env.HUGO_DIR}/hugo.tar.gz"
                    assert hugo_hash == "${HUGO_HASH}"
                    // Unpack Hugo
                    sh "tar -C ${env.HUGO_DIR}/bin -xkf ${env.HUGO_DIR}/hugo.tar.gz"

                    // Setup directory structure for generated content
                    env.TMP_DIR = sh(script:'mktemp -d', returnStdout: true).trim()
                    env.OUT_DIR = "${env.TMP_DIR}/content"
                    sh "mkdir -p ${env.OUT_DIR}"

                    // Setup directory for Gitbox checkout
                    env.GITBOX_REPO = sh(script:'mktemp -d', returnStdout: true).trim()
                }
            }
        }

        stage('Build') {
            steps {
                script {
                    withEnv(["PATH+HUGO=${env.HUGO_DIR}/bin"]) {
                        sh 'hugo version'
                        sh "hugo --destination ${env.OUT_DIR}"
                    }
                }
            }
        }

        stage('Deploy') {
            when {
                anyOf {
                    branch 'master'
                }
            }
            steps {
                script {
                    // Clone the Gitbox repo because that allows deployment to the asf-site branch
                    sh "git clone -b asf-site https://gitbox.apache.org/repos/asf/celix-site.git ${env.GITBOX_REPO}"

                    dir("${env.GITBOX_REPO}") {
                        // Remove the content of the target branch and replace it with the content of the temp folder
                        sh """
                            rm -rf ${env.GITBOX_REPO}/content
                            git rm -r --cached content/*
                            mkdir -p ${env.GITBOX_REPO}/content
                            cp -rT ${env.TMP_DIR}/* ${env.GITBOX_REPO}/content
                        """

                        // Commit the changes to the target branch
                        env.COMMIT_MESSAGE = "Updated site from ${BRANCH_NAME} (${env.LAST_SHA})"
                        sh """
                            git add -A
                            git commit -m "${env.COMMIT_MESSAGE}" | true
                        """

                        // Push the generated content for deployment
                        sh "git push -u origin ${DEPLOY_BRANCH}"
                    }
                }
            }
        }
    }
    
    post {
        always {
            script {
                sh """
                    rm -rf ${env.HUGO_DIR}
                    rm -rf ${env.TMP_DIR}
                    rm -rf ${env.GITBOX_REPO}
                """
            }
            deleteDir() /* clean up our workspace */
        }
    }
}