M2E Development Environment
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Download and unpack Eclipse latest SDK Kepler build from http://download.eclipse.org/eclipse/downloads/ .
Install m2e 1.4 or newer from http://download.eclipse.org/technology/m2e/releases .
Clone m2e-core repository. Committers should use ssh://YOUR_COMMITTERID@git.eclipse.org:29418/m2e/m2e-core. For other ways to access m2e git repository, including read-only anonymous access see https://git.eclipse.org/r/#/admin/projects/m2e/m2e-core
Import m2e-core as existing maven project. Follow onscreen instructions, allow m2e to install additional software and restart eclipse when requested. Give Eclipse some time to update project configuration after restart. You may need to do Project/Clean.../Clean_all_projects to clear all compilation errors.
Clone m2e-core-tests repository. Developers should use email@example.com:tesla/m2e-core-tests.git. See https://github.com/tesla/m2e-core-tests for other ways to clone m2e-core-tests repository.
Import m2e-core-tests as existing maven project.
Building m2e on command line
Building m2e on command line is a two step process, both performed from root of m2e-core checkout directory
First, you need to *install* m2e maven runtime to local maven repository
mvn clean install -f m2e-maven-runtime/pom.xml
Then, package m2e update site
mvn clean package
The repository is created under org.eclipse.m2e.site/target/repository directory.
Running m2e automated regression tests on command line
To run m2e automated regression tests, execute the following common from m2e-core-tests checkout directory
mvn clean integration-test -Puts,its -Dm2e-core.url=file://<full-path-to-m2e-repository>
m2e only accepts changes contributed via Gerrit. Here is the wiki that explains how to use it http://wiki.eclipse.org/Gerrit . Good luck.
According to eclipse legal poster, all contributors must have signed Eclipse CLA and their bugzilla email and git commit author must match (otherwise Eclipse git server refuses contribution).