Grails is a framework used to build web applications with the Groovy programming language. The core framework is very extensible and there are numerous plugins available that provide easy integration of add-on features.
You need a Java Development Kit (JDK) installed, but it is not necessary to install Groovy because it's bundled with the Grails distribution.
To install Grails, visit http://grails.org/Download and download the version you would like to use. Set a
GRAILS_HOME environment variable to point to the root of the extracted download and add
GRAILS_HOME/bin to your executable
PATH. Then in a shell, type the following:
grails create-app sampleapp cd sampleapp grails run-app
To build Grails, clone this GitHub repository and execute the install Gradle target:
git clone https://github.com/grails/grails-core.git cd grails-core ./gradlew install
If you encounter out of memory errors when trying to run the install target, try adjusting Gradle build settings. For example:
export GRADLE_OPTS="-Xmx2G -Xms2G -XX:NewSize=512m -XX:MaxNewSize=512m -XX:MaxPermSize=1G"
Performing a Release
Releases of Grails are automated by Travis CI.
To create a release perform the following steps.
First check that the tests are passing and all is well on Travis.
Next, update the Grails version in
grails-core/src/test/groovy/grails/util/GrailsUtilTests.java and then push the changes to git:
$ git add build.gradle grails-core/src/test/groovy/grails/util/GrailsUtilTests.java $ git commit -m "Release Grails 3.0.1" $ git tag v3.0.1 $ git push --tags $ git push
Note: Although by default Grails uses Artefactory to resolve dependencies, it is useful to have them in Maven Central too. To ensure they go to Maven Central login to Sonatype OSS Nexus with your account details then "Close" and "Release" the staged JAR files.
Grails and Groovy are licensed under the terms of the Apache License, Version 2.0.
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