added files to git

README.md

+# Jenkins Pipeline Shared Library Sample
+
+This project provides easy example of shared library which can be used into Jenkins pipeline.
+
+Setup instructions
+
+1. In Jenkins, go to Manage Jenkins → Configure System. Under Global Pipeline Libraries, add a library with the following settings:
+  * Library name: jenkins-pipeline-shared-lib-sample
+  * Default version: Specify a Git reference (branch or commit SHA), e.g. master
+  * Retrieval method: Modern SCM
+  * Select the Git type
+  * Project repository: https://github.com/AndreyVMarkelov/jenkins-pipeline-shared-lib-sample.git
+  * Credentials: (leave blank)
+  * You may have to turn off ssl verification using:     git.exe config --global http.sslVerify false
+
+2. Then create a Jenkins job with the following pipeline (note that the underscore _ is not a typo):
+
+```
+@Library('jenkins-pipeline-shared-lib-sample')_
+
+stage('Print Build Info') {
+    printBuildinfo {
+        name = "Sample Name"
+    }
+} stage('Disable balancer') {
+    disableBalancerUtils()
+} stage('Deploy') {
+    deploy()
+} stage('Enable balancer') {
+    enableBalancerUtils()
+} stage('Check Status') {
+    checkStatus()
+}
+```
+
+Run job!

src/Deployer.groovy

+@Grab(group = 'org.apache.commons', module = 'commons-lang3', version = '3.6')
+import org.apache.commons.lang3.StringUtils
+
+class Deployer {
+    int tries = 0
+    Script script
+
+    def run() {
+        while (tries < 10) {
+            Thread.sleep(1000)
+            tries++
+            script.echo("tries is numeric: " + StringUtils.isAlphanumeric("" + tries))
+        }
+    }
+}

src/Sample.groovy

+public class Sample {
+    private int x;
+    private int y;
+
+    public Sample(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    @Override
+    public String toString() {
+        return "Sample{" +
+                "x=" + x +
+                ", y=" + y +
+                '}';
+    }
+}

vars/checkStatus.groovy

+#!/usr/bin/env groovy
+
+def call(body) {
+    echo "Check status"
+
+    (1..3).each {
+        echo "Number: " + it
+    }
+
+    currentBuild.result = 'SUCCESS' //FAILURE to fail
+    return this
+}

vars/deploy.groovy

+#!/usr/bin/env groovy
+
+def call(body) {
+    echo "Start Deploy"
+
+    new Deployer(script:this).run()
+
+    echo "Deployed"
+    currentBuild.result = 'SUCCESS' //FAILURE to fail
+
+    return this
+}

vars/disableBalancerUtils.groovy

+#!/usr/bin/env groovy
+
+def call(body) {
+    echo "Disable balancer"
+
+    script:this.echo(new Sample(1, 3).toString())
+
+    return this
+}

vars/enableBalancerUtils.groovy

+#!/usr/bin/env groovy
+
+def call(body) {
+    echo "Enable balancer"
+    return this
+}

vars/gitCheckout.groovy

+def call(Map stageParams) {
+ 
+    checkout([
+        $class: 'GitSCM',
+        branches: [[name:  stageParams.branch ]],
+        userRemoteConfigs: [[ url: stageParams.url ]]
+    ])
+  }

vars/printBuildinfo.groovy

+#!/usr/bin/env groovy
+
+def call(body) {
+    def config = [:]
+    body.resolveStrategy = Closure.DELEGATE_FIRST
+    body.delegate = config
+    body()
+
+    echo config.name
+    echo "Param1 is: ${env.param1}"
+    echo "Param2 is: ${env.param2}"
+    if (env.param1 == 'One default') {
+        echo "Param1 is default"
+    }
+    return this
+}