[Grails][Grails] is a framework used to build web applications with the [Groovy][Groovy] programming language. The core framework is very extensible and there are numerous [plugins][plugins] available that provide easy integration of add-on features. [Grails]: http://grails.org/ [Groovy]: http://groovy-lang.org/ [plugins]: http://grails.org/plugins/
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"
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.
With that done checkout the Profile Repository and tag it for the release version. The tag should begin with the letter 'v'. For example::
$ git clone git@github.com:grails/grails-profile-repository.git
$ cd grails-profile-repository
$ git tag v3.0.2
$ git push --tags
Next, update the Grails version in build.gradle and 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 3.0.2"
$ git push
After pushing these changes to the repository you must wait for the build to complete. During this phase the JAR files will be uploaded to the Grails Artefactory Repository.
Once the build completes successfully, tag the release using Git:
$ git tag v3.0.2
$ git push --tags
The Travis CI build will run again and automatically upload the tagged release to Github and be available of the Releases page.
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.
At this point it is a good idea to release the documentation:
$ git clone git@github.com:grails/grails-doc.git
$ cd grails-doc
$ echo "grails.version=3.0.2" > gradle.properties
$ git add gradle.properties
$ git commit -m "Release 3.0.2 docs"
$ git tag v3.0.2
$ git push --tags
The Travis CI build for the documentation will automatically publish the documentation and make it available on the website at: http://grails.org/doc/3.0.2
Finally to update the website's download page you should edit the sitemap
Grails and Groovy are licensed under the terms of the [Apache License, Version 2.0][Apache License, Version 2.0]. [Apache License, Version 2.0]: http://www.apache.org/licenses/LICENSE-2.0.html
YourKit is kindly supporting Grails open source projects with its full-featured Java Profiler. YourKit, LLC is the creator of innovative and intelligent tools for profiling Java and .NET applications. Take a look at YourKit's leading software products: YourKit Java Profiler and YourKit .NET Profiler.