Adding an example of a global function.

Author: abayer

global-library-examples/global-function/Jenkinsfile

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+#!groovy
+
+// Loads the standardBuild method from workflowLibs.git/vars/standardBuild.groovy
+// and invokes it.
+standardBuild {
+ environment = 'golang:1.5.0'
+ mainScript = '''
+go version
+go build -v hello-world.go
+'''
+ postScript = '''
+ls -l
+./hello-world
+'''
+}

global-library-examples/global-function/README.md

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+# Synopsis
+An example of how to define a global function for the Workflow DSL on
+your Jenkins master using the global CPS library.
+
+# Credit
+
+This comes from the [CloudBeers demo](https://github.com/cloudbeers/multibranch-demo).

global-library-examples/global-function/standardBuild.groovy

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+// See https://github.com/jenkinsci/workflow-plugin/tree/master/cps-global-lib#defining-global-functions
+
+// The call(body) method in any file in workflowLibs.git/vars is exposed as a
+// method with the same name as the file.
+def call(body) {
+ def config = [:]
+ body.resolveStrategy = Closure.DELEGATE_FIRST
+ body.delegate = config
+ body()
+ stage 'checkout'
+ node {
+ checkout scm
+ stage 'main'
+ docker.image(config.environment).inside {
+ sh config.mainScript
+ }
+ stage 'post'
+ sh config.postScript
+ }
+}