JSIEVE-117 Set up Jenkins build system
diff --git a/Jenkinsfile b/Jenkinsfile
new file mode 100644
index 0000000..8288b67
--- /dev/null
+++ b/Jenkinsfile
@@ -0,0 +1,183 @@
+#!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
+ *
+ *      http://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.
+ *
+ */
+
+def AGENT_LABEL = env.AGENT_LABEL ?: 'ubuntu'
+def JDK_NAME = env.JDK_NAME ?: 'jdk_11_latest'
+
+pipeline {
+
+    agent {
+        node {
+            label AGENT_LABEL
+        }
+    }
+
+    environment {
+        // ... setup any environment variables ...
+        BUILD_ID = UUID.randomUUID().toString()
+        MVN_LOCAL_REPO_OPT = '-Dmaven.repo.local=.repository'
+        MVN_TEST_FAIL_IGNORE = '-Dmaven.test.failure.ignore=true'
+        MVN_SHOW_TIMESTAMPS="-Dorg.slf4j.simpleLogger.showDateTime=true -Dorg.slf4j.simpleLogger.dateTimeFormat=HH:mm:ss,SSS"
+        CI = true
+        LC_CTYPE = 'en_US.UTF-8'
+    }
+
+    tools {
+        // ... tell Jenkins what java version, maven version or other tools are required ...
+        maven 'maven_3_latest'
+        jdk JDK_NAME
+    }
+
+    options {
+        // Configure an overall timeout for the build of 10 minutes.
+        timeout(time: 10, unit: 'MINUTES')
+        // When we have test-fails e.g. we don't need to run the remaining steps
+        skipStagesAfterUnstable()
+        buildDiscarder(
+                logRotator(artifactNumToKeepStr: '10', numToKeepStr: '30')
+        )
+        disableConcurrentBuilds()
+    }
+
+    triggers {
+        issueCommentTrigger('.*test this please.*')
+    }
+
+    stages {
+        stage('Initialization') {
+            steps {
+                echo 'Building branch ' + env.BRANCH_NAME
+                echo 'Using PATH ' + env.PATH
+            }
+        }
+
+        stage('Cleanup') {
+            steps {
+                echo 'Cleaning up the workspace'
+                deleteDir()
+            }
+        }
+
+        stage('Checkout') {
+            steps {
+                echo 'Checking out branch ' + env.BRANCH_NAME
+                checkout scm
+            }
+        }
+
+        stage('Build') {
+            steps {
+                echo 'Building'
+                sh 'mvn -U -B -e clean install -DskipTests ${MVN_SHOW_TIMESTAMPS}'
+            }
+        }
+
+        stage('Stable Tests') {
+            steps {
+                echo 'Running tests'
+                sh 'mvn -U -B -e clean install ${MVN_SHOW_TIMESTAMPS}'
+            }
+            post {
+                always {
+                    junit(testResults: '**/surefire-reports/*.xml', allowEmptyResults: false)
+                    junit(testResults: '**/failsafe-reports/*.xml', allowEmptyResults: true)
+                }
+                failure {
+                    archiveArtifacts artifacts: '**/target/test-run.log' , fingerprint: true
+                    archiveArtifacts artifacts: '**/surefire-reports/*' , fingerprint: true
+                }
+            }
+        }
+
+        stage('Deploy') {
+            when { branch 'master' }
+            steps {
+                echo 'Deploying'
+                sh 'mvn -B -e deploy -Pdeploy -DskipTests'
+            }
+        }
+   }
+// Do any post build stuff ... such as sending emails depending on the overall build result.
+    post {
+        // If this build failed, send an email to the list.
+        failure {
+            script {
+                if (env.BRANCH_NAME == "master") {
+                    emailext(
+                            subject: "[BUILD-FAILURE]: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]'",
+                            body: """
+BUILD-FAILURE: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]':
+Check console output at "<a href="${env.BUILD_URL}">${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]</a>"
+""",
+                            to: "server-dev@james.apache.org",
+                            recipientProviders: [[$class: 'DevelopersRecipientProvider']]
+                    )
+                }else{
+                    emailext(
+                            subject: "[BUILD-FAILURE]: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]'",
+                            body: """
+BUILD-FAILURE: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]':
+Check console output at "<a href="${env.BUILD_URL}">${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]</a>"
+""",
+                            recipientProviders: [[$class: 'DevelopersRecipientProvider']]
+                    )
+                }
+            }
+        }
+
+        // If this build didn't fail, but there were failing tests, send an email to the list.
+        unstable {
+            script {
+                if (env.BRANCH_NAME == "master") {
+                    emailext(
+                            subject: "[BUILD-UNSTABLE]: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]'",
+                            body: """
+BUILD-UNSTABLE: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]':
+Check console output at "<a href="${env.BUILD_URL}">${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]</a>"
+""",
+                            to: "server-dev@james.apache.org",
+                            recipientProviders: [[$class: 'DevelopersRecipientProvider']]
+                    )
+                }
+            }
+        }
+
+        // Send an email, if the last build was not successful and this one is.
+        success {
+            // Cleanup the build directory if the build was successful
+            // (in this cae we probably don't have to do any post-build analysis)
+            deleteDir()
+            script {
+                if (env.BRANCH_NAME == "master" && (currentBuild.previousBuild != null) && (currentBuild.previousBuild.result != 'SUCCESS')) {
+                    emailext(
+                            subject: "[BUILD-STABLE]: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]'",
+                            body: """
+BUILD-STABLE: Job '${env.JOB_NAME} [${env.BRANCH_NAME}] [${env.BUILD_NUMBER}]':
+Is back to normal.
+""",
+                            to: "server-dev@james.apache.org",
+                            recipientProviders: [[$class: 'DevelopersRecipientProvider']]
+                    )
+                }
+            }
+        }
+    }
+}