[eclipse/xtext#1526] Replace Jenkinsfile with content of CBI.Jenkinsfile

This commit purposefully introduces a duplicate Jenkinsfile,
which is meant to be kept long enough for all
branches to receive it.

After this and when the Jenkins jobs point to the new Jenkinsfile,
CBI.Jenkinsfile can be removed without losing build histories in Jenkins

Signed-off-by: Nico Prediger <mail@nicoprediger.de>

Jenkinsfile

@@ -1,6 +1,61 @@
 pipeline {
-  agent any
-
+  agent {
+    kubernetes {
+      label 'xtext-core-' + env.BRANCH_NAME + '-' + env.BUILD_NUMBER
+      defaultContainer 'xtext-buildenv'
+      yaml '''
+apiVersion: v1
+kind: Pod
+spec:
+  containers:
+  - name: jnlp
+    image: 'eclipsecbi/jenkins-jnlp-agent'
+    args: ['\$(JENKINS_SECRET)', '\$(JENKINS_NAME)']
+    resources:
+      limits:
+        memory: "0.4Gi"
+        cpu: "0.2"
+      requests:
+        memory: "0.4Gi"
+        cpu: "0.2"
+    volumeMounts:
+    - mountPath: /home/jenkins/.ssh
+      name: volume-known-hosts
+  - name: xtext-buildenv
+    image: docker.io/smoht/xtext-buildenv:0.7
+    tty: true
+    resources:
+      limits:
+        memory: "3.6Gi"
+        cpu: "1.0"
+      requests:
+        memory: "3.6Gi"
+        cpu: "1.0"
+    volumeMounts:
+    - name: settings-xml
+      mountPath: /home/jenkins/.m2/settings.xml
+      subPath: settings.xml
+      readOnly: true
+    - name: m2-repo
+      mountPath: /home/jenkins/.m2/repository
+    - name: volume-known-hosts
+      mountPath: /home/jenkins/.ssh
+  volumes:
+  - name: volume-known-hosts
+    configMap:
+      name: known-hosts
+  - name: settings-xml
+    configMap: 
+      name: m2-dir
+      items:
+      - key: settings.xml
+        path: settings.xml
+  - name: m2-repo
+    emptyDir: {}
+    '''
+    }
+  }
+  
   environment {
     DOWNSTREAM_JOBS = 'xtext-extras'
   }
@@ -20,16 +75,11 @@ pipeline {
     timestamps()
   }
 
-  tools { 
-    maven 'M3'
-  }
-
+  // Build stages
   stages {
     stage('Checkout') {
       steps {
         checkout scm
-        dir('.m2/repository/org/eclipse/xtext') { deleteDir() }
-        dir('.m2/repository/org/eclipse/xtend') { deleteDir() }
       }
     }
 
@@ -64,28 +114,37 @@ pipeline {
         }
       }
     }
-    changed {
+    cleanup {
       script {
-        def envName = ''
-        if (env.JENKINS_URL.contains('ci.eclipse.org/xtext')) {
-          envName = ' (JIPP)'
-        } else if (env.JENKINS_URL.contains('typefox.io')) {
-          envName = ' (TF)'
-        }
-        
         def curResult = currentBuild.currentResult
-        def color = '#00FF00'
-        if (curResult == 'SUCCESS') {
-           if (currentBuild.previousBuild != null && currentBuild.previousBuild.result != 'SUCCESS') {
-             curResult = 'FIXED'
-           }
-        } else if (curResult == 'UNSTABLE') {
-          color = '#FFFF00'
-        } else { // FAILURE, ABORTED, NOT_BUILD
-          color = '#FF0000'
+        def lastResult = 'NEW'
+        if (currentBuild.previousBuild != null) {
+          lastResult = currentBuild.previousBuild.result
+        }
+
+        if (curResult != 'SUCCESS' || lastResult != 'SUCCESS') {
+          def color = ''
+          switch (curResult) {
+            case 'SUCCESS':
+              color = '#00FF00'
+              break
+            case 'UNSTABLE':
+              color = '#FFFF00'
+              break
+            case 'FAILURE':
+              color = '#FF0000'
+              break
+            default: // e.g. ABORTED
+              color = '#666666'
+          }
+
+          slackSend (
+            message: "${lastResult} => ${curResult}: <${env.BUILD_URL}|${env.JOB_NAME}#${env.BUILD_NUMBER}>",
+            botUser: true,
+            channel: 'xtext-builds',
+            color: "${color}"
+          )
         }
-        
-        slackSend message: "${curResult}: <${env.BUILD_URL}|${env.JOB_NAME}#${env.BUILD_NUMBER}${envName}>", botUser: true, channel: 'xtext-builds', color: "${color}"
       }
     }
   }