Welcome to openmentor grails! - omtetra/openmentor-grails GitHub Wiki
Open Mentor can be built and run using either Maven or an installed version of Grails. If you are simply building Open Mentor, Maven might be easier, as it requires less setup. If you are actively going to edit Open Mentor, you might find a full Grails development environment, such as the SpringSource Tool Suite (STS), to be a little easier to use.
To build a war file, simply use Maven:
mvn package
Or using Grails
grails war
NOTE: When using Maven, the default memory setup for Maven is probably not enough. The Grails team recommends the following environment variable setting to avoid poor performance:
export MAVEN_OPTS="-Xmx512m -XX:MaxPermSize=192m"