[MNG-6172] Precedence of command-line system property options has changed

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 3.5.0-alpha-1, 3.5.0
• Component/s: Command Line
• Assignee: Stephen Connolly
• Reporter: Stuart McCulloch
• Created: 13/Feb/17 10:29
• Updated: 25/Mar/17 12:10
• Resolved: 23/Feb/17 14:37

Description

The current state of master (what will eventually become 3.5.0) has reversed the precedence of command-line system property options compared to previous releases of Maven.

For example, running this command with a basic project:

mvn -Dmaven.repo.local=/tmp/aaa -Dmaven.repo.local=/tmp/zzz validate

using current master will cause /tmp/aaa to be created (first-one-wins), whereas for all previous releases of Maven /tmp/zzz would have been created (last-one-wins)

This has the potential to break CI builds which relied on the previous last-one-wins behaviour.

This was introduced by the fix for MNG-6078 https://github.com/apache/maven/commit/ca4303031357a7decaee8de770b71fb2c2fedd28 - by reversing the whole array the precedence between options on the same command line has been reversed, not just the relationship between .mvn/maven.config options and command line options.