Gradle plugin that provides tasks for managing Gaelyk projects
Groovy Shell
Pull request Compare This branch is 36 commits behind gaelyk:master.
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.

Gradle Gaelyk plugin

Gaelyk Logo

The plugin provides tasks for managing Gaelyk projects in any given Gradle build. It applies Gradle GAE plugin and Groovy plugin to the project. It changes the configuration of FatJAR and GAE plugins and of main source set to better fit Gaelyk application needs. Finally it adds some Gaelyk specific tasks.

Gaelyk plugin applies Gaelyk plugin to provide tasks for running the application, uploading it to GAE etc. - see Gradle GAE plugin's documentation for details.


To use the Gaelyk plugin, apply the plugin to your build script:

apply plugin: 'gaelyk'

The plugin JAR needs to be defined in the classpath of your build script. It is directly available on Maven Central. Alternatively, you can download it from GitHub and deploy it to your local repository. The following code snippet shows an example on how to retrieve it from Maven Central:

buildscript {
    repositories {

    dependencies {
        classpath 'bmuschko:gradle-gaelyk-plugin:0.4.1'

Convention properties

The Gaelyk plugin defines the following convention properties in the gaelyk closure:

  • rad: specifies if the application should be started in Rapid Application Development mode when using gaeRun task (defaults to true). If you run in RAD mode any changes made to your groovlets, templates and static resources (but not to classes) in the source directory will be instantly visible on a page reload. The downside is that your source directory is polluted with jars in 'WEB-INF/lib' and compiled classes in 'WEB-INF/classes'. If you wish to avoid that set rad property to false. Doing so will mean that application's war file will be exploded in build/exploded-war directory which in turn will be used as the application root when running locally (with gaeRun).

Integration with other Gradle plugins

  • Gaelyk plugin uses webAppDir convention property of War plugin (which is applied to the project by GAE plugin) to determine the location of project's webapp dir. The default location is src/main/webapp and can be changed using webAppDirName convention property of War plugin.
  • When running in RAD mode (see conventions for details) GAE plugin's warDir convention property is set to the value of webAppDir War plugin's property. Please use webAppDirName convention property of War plugin to change warDir property of GAE plugin.
  • GAE plugin's dowloadSdk property is set to true by default
  • GAE plugin's optimizeWar property is set to true by default
  • FATJar plugin's tasks are skipped when running in RAD mode and starting development server as the server works against webapp dir

Modifications to project configuration

When running in RAD mode (see conventions for details) main source set output directory as well as main resources output directory is set to <webAppDir>/WEB-INF/classes - this is required by Gaelyk to run development server against webapp dir which in turn enables reloading of changes to groovlets and templates code without restarting the server.

Dependencies you need to specify

When applying gaelyk plugin to your project remember that you have to specify the folowing dependencies:

  • groovy - because Groovy plugin requires it
  • gaeSdk - because GAE plugin requires it

To be able to develop a Gaelyk application you also need to add a compile dependency on Gaelyk. The dependencies section of your build might look like this:

dependencies {
    groovy 'org.codehaus.groovy:groovy-all:1.8.6'
    gaeSdk ""
    compile 'org.gaelyk:gaelyk:1.2'


  • gaelykListPlugins: Shows all available plugins from the Gaelyk plugins catalogue.
  • gaelykInstallPlugin: Installs plugin provided by the command line property plugin. Plugin must be plugin identificator from the catalgoue or ZIP archive either on the file system or on the web. Example: gradle gaelykInstallPlugin -Pplugin= installs the JSON plugin.
  • gaelykUninstallPlugin: Uninstalls plugin specified by given path or name provided by the command line property plugin. Path or name can easily be determined by running the gaelykListInstalledPlugins task. The name is the name of the original file without the ZIP extension. Example: gradle gaelykUninstallPlugin -Pplugin= uninstalls the JSON plugin. gradle gaelykUninstallPlugin -Pplugin=gaelyk-jsonlib-plugin-0.2 would do the same work.
  • gaelykListInstalledPlugins: Shows plugins that have been installed by the gaelykInstallPlugin task.
  • gaelykPrecompileGroovlet: Precompiles Groovlets to minimize startup costs. If your scripts reside in any subfolder don't forget to declare the script's package correspondingly.
  • gaelykPrecompileTemplate: Precompiles Groovy templates to minimize startup costs. All static templates' includes such as <% include 'foo.gtpl' %> are inlined for better performance.
  • gaelykCopyRuntimeLibraries: Synchronises runtime libraries in webapp directory.

Task Rules

  • gaelykCreateController<ControllerName>: Creates a Gaelyk controller (Groovlet). Optionally, you can define the directory to put the file in using the command line property dir. Example: gradle gaelykCreateControllerUser creates the file user.groovy in the directory war/WEB-INF/groovy.
  • gaelykCreateView<ViewName>: Creates a Gaelyk view (Groovy template). Optionally, you can define the directory to put the file in using the command line property dir. Example: gaelykCreateViewAddress -Pdir=address creates the file address.gtpl in the directory war/address.