[JIRA] (JENKINS-60634) Define WORKSPACE_TMP=.../workspace/jobname@tmp

jglick@cloudbees.com (JIRA)

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Jan 3, 2020, 2:51:02 PM1/3/20

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Jesse Glick created an issue

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JENKINS-60634

Define WORKSPACE_TMP=.../workspace/jobname@tmp

Issue Type:	Improvement
Assignee:	Jesse Glick
Components:	core, workflow-durable-task-step-plugin
Created:	2020-01-03 19:50
Priority:	Minor
Reporter:	Jesse Glick

WorkspaceList.createTempDir (~~JENKINS-27152~~) is used by various plugins, and from Pipeline builds you can even use pwd tmp: true to use this location for custom purposes, but this is awkward. In practice many scripts wind up just binding this to a variable (example). We should define it out of the box.

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jglick@cloudbees.com (JIRA)

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Jan 3, 2020, 2:52:01 PM1/3/20

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Jesse Glick started work on

JENKINS-60634

Change By:	Jesse Glick
Status:	Open In Progress

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jglick@cloudbees.com (JIRA)

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Jan 3, 2020, 3:02:02 PM1/3/20

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Jesse Glick updated an issue

Jenkins /

JENKINS-60634

Define WORKSPACE_TMP=.../workspace/jobname@tmp

Change By:	Jesse Glick

{{WorkspaceList.createTempDir}} (JENKINS-27152) is used by various plugins, and from Pipeline builds you can even use {{pwd tmp: true}} to use this location for custom purposes, but this is awkward. In practice many scripts wind up just binding this to a variable ([example|https://github.com/jenkinsci/kubernetes-plugin/blob/281d296f9a5945094a59b0f6f7362cbceede762a/Jenkinsfile#L10]). We should define it out of the box.

{{$WORKSPACE}} is used for the main workspace (though not frequently needed as this is also the default working directory). {{$WORKSPACE_TMP}} seems like an intuitive name for the new property and matches the style of the {{@tmp}} suffix. [Standard practice in Linux|https://en.wikipedia.org/wiki/TMPDIR] is to allow {{$TMPDIR}} to define a temporary directory, but using this variable name would result in a behavioral change for some existing scripts that may be unwanted, for example if {{/tmp}} is a RAM filesystem while the Jenkins workspace is persistent; we would like to offer a facility that users can opt in to where it makes sense (for example for project-specific caches) but not where it does not make sense (temporary files that are soon after deleted).