added slack notifications

Jenkinsfile

@@ -1,31 +1,58 @@
 #!/usr/bin/env groovy
 
+slackSend "Building ${env.JOB_NAME}/${env.BRANCH_NAME} #${env.BUILD_NUM}"
 parallel 'centos7': {
     node('centos7') {
-        checkout scm
+        try {
+            checkout scm
 
-	    stage('Build Centos 7') {
-            sh 'make -f make-linux.mk'
+	        stage('Build Centos 7') {
+                sh 'make -f make-linux.mk'
+            }
+        }
+        catch (err) {
+            currentBuild.result = "FAILURE"
+            slackSend color: '#ff0000', message: "${env.JOB_NAME}/${env.BRANCH_NAME} broken on Centos 7 (<${env.BUILD_URL}|Open>)"
+
+            throw err
         }
     }
 }, 'android-ndk': {
     node('android-ndk') {
-        checkout scm
+        try {
+            checkout scm
 	
-        stage('Build Android NDK') { 
-            sh '/android/android-ndk-r13/ndk-build -C $WORKSPACE/java ZT1=$WORKSPACE'
+            stage('Build Android NDK') { 
+                sh "/android/android-ndk-r13/ndk-build -C $WORKSPACE/java ZT1=${WORKSPACE}"
+            }
+        }
+        catch (err) {
+            currentBuild.result = "FAILURE"
+            slackSend color: '#ff0000', message: "${env.JOB_NAME}/${env.BRANCH_NAME} broken on Android NDK (<${env.BUILD_URL}|Open>)"
+
+            throw err
         }
     }
 }, 'macOS': {
     node('macOS') {
-        checkout scm
+        try {
+            checkout scm
+
+            stage('Build macOS') {
+                sh 'make -f make-mac.mk'
+            }
 
-        stage('Build macOS') {
-            sh 'make -f make-mac.mk'
+            stage('Build macOS UI') {
+                sh 'cd macui && xcodebuild -target "ZeroTier One" -configuration Debug'
+            }
         }
+        catch (err) {
+            currentBuild.result = "FAILURE"
+            slackSend color: '#ff0000', message: "${env.JOB_NAME}/${env.BRANCH_NAME} broken on macOS (<${env.BUILD_URL}|Open>)"
 
-        stage('Build macOS UI') {
-            sh 'cd macui && xcodebuild -target "ZeroTier One" -configuration Debug'
+            throw err
         }
     }
 }
+
+slackSend "${env.JOB_NAME}/${env.BRANCH_NAME} #${env.BUILD_NUM} Complete (<${env.BUILD_URL}|Show More...>)"