[MRELEASE-853] Use "git --depth 1" When Checking Out

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.2.2
• Component/s: Git
• Environment: Maven 3.1.1
• Assignee: Unassigned
• Reporter: Ernst de Haan
• Created: 05/Nov/13 07:24
• Updated: 10/Jan/14 06:28
• Resolved: 10/Jan/14 06:27

Description

Executive summary: Please use --depth 1 when checking out from a git repository.

Currently when doing mvn release:prepare release:perform, the git checkout step takes a significant amount of time.

During the git checkout it appears to not only check out the correct version of the code, but also all history, as would be done with a regular:

git clone URL

However, git supports checking out only the latest version of the code base, using this command:

git clone --depth 1 URL

For the purpose of the Maven Release Plugin, that should be sufficient, as far as I can see.

Changing the plugin to use --depth 1 would significantly improve performance and reduce I/O on repositories with a lot of history.