can not create file via Groovy code(or java code) in jenkinsfile of a pipeline job on Jenkins

Question

pipeline { agent any stages { stage('Build') { steps { echo 'Building..' echo "whoami".execute().text script { File f = new File('/home/jenkins/test2.txt'); f.createNewFile(); } } } stage('Test') { steps { echo 'Testing..' } } stage('Deploy') { steps { echo 'Deploying....' } } } }

Jenkins console log: (got exception: Started by user Edgar Yu Running in Durability level: MAX_SURVIVABILITY [Pipeline] node Running on Jenkins in /var/jenkins_home/workspace/test2 [Pipeline] { [Pipeline] stage [Pipeline] { (Build) [Pipeline] echo Building.. [Pipeline] echo jenkins

[Pipeline] script [Pipeline] { [Pipeline] } [Pipeline] // script [Pipeline] } [Pipeline] // stage [Pipeline] stage [Pipeline] { (Test) Stage 'Test' skipped due to earlier failure(s) [Pipeline] } [Pipeline] // stage [Pipeline] stage [Pipeline] { (Deploy) Stage 'Deploy' skipped due to earlier failure(s) [Pipeline] } [Pipeline] // stage [Pipeline] } [Pipeline] // node [Pipeline] End of Pipeline java.io.IOException: Permission denied at java.io.UnixFileSystem.createFileExclusively(Native Method) at java.io.File.createNewFile(File.java:1012)

Does your jenkins user have write access to /home/jenkins dir? Looks like no... — Evgeny Smirnov
– Evgeny Smirnov, Commented Feb 14, 2018 at 11:07
Grant permission to app running user of given directory/file, for example, chmod 777 fileName (this will grant all permissions to all users and groups) — Nitin Dhomse
– Nitin Dhomse, Commented Feb 14, 2018 at 12:16
You do not know the situation at all. You do not understand what I am talking about. — Edgar Yu
– Edgar Yu, Commented Feb 15, 2018 at 17:25

Sam · Accepted Answer · 2018-02-15 00:41:18Z

This is due to Jenkins not implementing Groovy itself but an interpreter (CPS) - https://github.com/cloudbees/groovy-cps

To help deal with the complexities introduced, there are some common Steps implemented to take the trouble out of tasks such as creating a file.

To use Jenkins pipeline steps out of the box, use writeFile: https://jenkins.io/doc/pipeline/steps/workflow-basic-steps/#code-writefile-code-write-file-to-workspace

writeFile([file: 'file.txt', text: filetxt])

If your deadset on writing your own, I suggest splitting it out into a Shared library, note this will probably cause ScriptSecurity alerts that will require approval:

final class PipelineUtils implements Serializable { private script=null private static final PipelineUtils instance = new PipelineUtils() @NonCPS String saveFile(String filename, String text) { String PWD = script.pwd() String filePath = "${PWD}/${filename}" File file = new File(filePath) file.text = text } }

See https://github.com/jenkinsci/pipeline-plugin/blob/master/TUTORIAL.md for information regarding @NonCPS and nonserializable objects.

How will you append to the same file, if you use the writeFile?
This answer to another question can assist: stackoverflow.com/a/46941503/7223663, essentially, read and then append in groovy and re-write the file.

Collectives™ on Stack Overflow

can not create file via Groovy code(or java code) in jenkinsfile of a pipeline job on Jenkins

1 Answer 1

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Linked

Related