Source Repository
Maven projects use Git to manage their source code.
Instructions on Git use can be found in the online book Pro Git. Instructions for using the Apache Software Foundation Git repositories are at GitBox - ASF Writable Git Services.
Full Maven Sources
As described in the next paragraphs, Maven full source code is dispatched in more than 100 Git repos: Maven core, but also plugins or components, skins, a few svn2git read-only mirrors...
To check out full Maven source code easily, we provide a simple way using additional Google repo tool and an additional Git repository for tool's manifest:
| Content | Repository | Mirror |
|---|---|---|
| Apache Maven full source code | https://gitbox.apache.org/repos/asf/maven-sources.git | GitHub |
Install a Git client if needed and the Google repo tool (see manual install instructions).
Check out a new repo workspace and prepare master branch:
repo init -u https://github.com/apache/maven-sources.git repo sync repo start master --all
In your IDE, import the projects you're interested in from the repo workspace. Or directly build with command line the component you want.
Maven Sources Overview
Each component has its own Jira project or component for issue tracking: see the Issue Management report to get a summary.
Maven Site
The sources for this site are available in a distinct Git repository.
| Content | Repository | Mirror | Issues |
|---|---|---|---|
| Apache Maven Site | https://gitbox.apache.org/repos/asf/maven-site.git | GitHub | GitHub Issues |
Note: If you want to submit small site amendments, for example correct a spelling mistake, you don‘t have to install Git locally. You can simply hit the “Edit” 
button after the page’s title in the breadcrumb section on the top of the page. This will open the page's source file on GitHub, where you can edit it and easily open a pull request containing your change.
Maven Core
The Git repository for Maven contains a master branch which is the current development version. There is also a branch for maven-2.2.X or maven-3.0.x. In addition, the integration tests for the Maven core have their own repository.
Other Components
The source repositories for the various plugins are in Git, listed in the documentation of the respective plugin, reachable via the plugin index. There are also many shared components and subsystems with their own source repositories, mainly in Git, some in Subversion.
Components in Git
The components in Git are shown in the following table.
Plugins
Parent POMs
Shared Components
Skins
| Content | Repository | Mirror | Issues |
|---|---|---|---|
| Apache Maven Fluido Skin | https://gitbox.apache.org/repos/asf/maven-fluido-skin.git | GitHub | GitHub Issues |
Components in Subversion
Everything in Subversion can be checked-out from a single entry point, referencing each part through svn:externals https://svn.apache.org/repos/asf/maven/trunks/.
You can also check out every component separately. The components in Subversion are:
| Content | Repository | Mirror |
|---|---|---|
| Maven Project (mainly KEYS) | https://svn.apache.org/viewvc/maven/project | |
| Maven Sandbox | https://svn.apache.org/viewvc/maven/sandbox/trunk/ | GitHub |
| A variety of other subsystems (including obsolete trees replaced by git) | https://svn.apache.org/viewvc/maven/ |