# Jenkins Shared-Library

## 讓Shared-Library裡面的print可以在Jenkins Console裡面看到

- 來源
[Stackovseflow](https://stackoverflow.com/questions/47320406/propagating-logs-in-shared-library-to-jenkins-job-console)
[Gist](https://gist.github.com/mucst/35c3603aaf36becd2d6722696afb8e0a)

.
├── resources
├── src
│   └── org
│       └── jenkins
│           ├── JenkinsUtils.groovy
│           └── Slack.groovy

- JenkinsUtils.groovy

package org.jenkins

class JenkinsUtils {

    static Closure<Void> log = { throw new RuntimeException("Logger not configured") }

}

- Slack.groovy

package org.jenkins
import org.jenkins.JenkinsUtils


class Slack {

    def sendMessage() {
        JenkinsUtils.log("..asdasdasdasd.")
        }
}

- Jenkinsfile

@Library("jenkins-lib@main") _
import  org.jenkins.Slack
import org.jenkins.JenkinsUtils

@NonCPS
def setupLogging() {
  JenkinsUtils.log = { String msg-> echo msg }
}
setupLogging()


node () {
    stage("Verify") {

        def myvar = new Slack()
        myvar.sendMessage()
    }
}

- output

[Pipeline] Start of Pipeline
[Pipeline] node
Running on Jenkins in /var/jenkins_home/workspace/test/backend/test
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Verify)
[Pipeline] echo
..asdasdasdasd.
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS

這寫法是在JenkinsUtils.groovy先定義，instantiate JenkinsUtils.log的話就會回傳錯誤，而instantiate的部分是在jenkinsfile裡面的