[MPOM-266] Incorrect message with missing property "project.build.outputTimestamp"

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: ASF-24
• Fix Version/s: ASF-25
• Component/s: asf
• Assignee: Herve Boutemy
• Reporter: Konrad Windszus
• Created: 24/Aug/21 09:04
• Updated: 12/Feb/22 16:31
• Resolved: 26/Dec/21 21:52

Description

The check introduced with MPOM-255 emits the following error message:

The property "project.build.outputTimestamp" must be set on the reactor's root pom.xml to make the build reproducible. Further information at "https://maven.apache.org/guides/mini/guide-reproducible-builds.html".

Having the property on the reactor's root pom.xml is not sufficient though in case reactor root != parent.

Consider the following project structure

reactor root (has no parent)
+ module1 (has parent: parent)
+ parent (has parent: asf-parent)

In this case setting the property in reactor root is not enough, as each module's effective pom.xml must contain the property project.build.outputTimestamp.

Issue Links

• is caused by: MPOM-255 Enforce local property "project.build.outputTimestamp" for reproducible builds
• is superceded by: MPOM-265 re-enable reproducible builds for ASF parent POM source-release.zip
• relates to: MARTIFACT-28 warn if project.build.outputTimestamp has not been defined in reactor but in independent parent