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To build the Geronimo Eclipse Plugin (GEP) from source you need to have the following prerequisites installed.
You can also change the default location of m2repo by modifying <MAVEN_HOME>/conf/settings.xml and modify the following tag
It is strongly recommended that you use a small directory name for the source code download. At times there have been issues due to long path.
The following environment variable needs be set to properly configure the JVM to meet memory requirements.
MAVEN_OPTS="-Xms512m -Xmx512m -XX:MaxPermSize=256m"
On Windows use the following command to set the environment variable (note that double quotes should not be used):
set MAVEN_OPTS=-Xmx512m -XX:MaxPermSize=128m
You do not need to manually download Eclipse or the web tools project to build. This is taken care of for you automatically during the build process. You can find the downloads at
Skipping tests is not recommended