# Build system

## Build system

Detailed insight in the standard XP build system

 We recommend using Enonic CLI to control your builds by default.

By default, XP projects use Gradle as the main build tool. This is a highly flexible Java-based utility that builds on the popular Maven project tools and code repository structures. Enonic provides a Gradle plugin that greatly simplifies the build process. If you used the starter-vanilla project to initialize your project, you will have all the basic tools you need to get going.

The build.gradle file located at your project root defines all the dependencies to other libraries.

There are three standard scopes (keywords) used in the dependency list

• Compile (default gradle scope, compiles library and adds it to class path - standard for pure Java libraries)

• Include (XP custom scope that merges the /src/main/resources folder in the library with your project - any code in your project overwrites the library files)

• Webjar (Extracts the content of the specified Webjar - http://www.webjars.org/ - placing it into the assets folder, using the version number as root folder)

## Environment variables

Enonic CLI automatically detects and uses project relative environment variables based on your XP distro and Sandbox.

If you plan to invoke Gradle directly, you will need to setup these variables manually

The following environment variables need to be defined:

XP_HOME

Defines the location of the home folder (typically the home folder within your sandbox)

JAVA_HOME

Defines the location of Java to support execution of Gradle (typically the jdk folder within your XP distro)

To set these variables use one of the following approaches:

### Project shell

Enonic CLI supports opening a new shell with environment variables automatically set:

enonic project shell

Linux/MacOS

$(enonic project env) ### Manual setup Manually set environment variables for your project: Linux/MacOS export XP_HOME=/path/to/sandbox/home export JAVA_HOME=/path/to/xp-distro/jdk Windows set XP_HOME=c:\path\to\sandbox\home set JAVA_HOME=c:\path\to\xp-distro\jdk ## Gradle Wrapper The Gradle Wrapper is a file located in your projects root: gradlew for Linux/MacOS and gradle.bat for Windows. The wrapper will download all necessary files to run Gradle and execute project specific build commands.  The gradle wrapper may also be invoked directly from Enonic CLI using enonic gradle. All params following this command will be passed directly to the wrapper. ### Building Enonic CLI’s enonic project build command automatically wraps and invokes the Gradle Wrapper. With environment variables set, you may use Gradle directly to get the job done: From your project folder root execute the following command: OSX/Linux ./gradlew build Windows gradlew.bat build The build will place any output artifacts in the project’s build/libs/ folder. ### Deploying Enonic CLI’s enonic project deploy command builds and deploys an app to your sandbox. You may do the same using Gradle directly: OSX/Linux ./gradlew deploy Windows gradlew.bat deploy The artifact is copied into the following location: $XP_HOME/deploy, where XP will automatically pick it up.

 XP apps deployed via file (locally) are presented with a small blue icon in the Applications tool in XP Admin.

### Development Mode

Enonic XP supports a so-called Development mode. When running in this mode, XP will automatically source JavaScript controllers directly from your project folder.

This may be convenient if you are developing with pure JavaScript and do not depend on build steps in your project.

You may activate dev mode when starting XP as follows:

Enonic CLI

enonic sandbox start --dev

Linux/MacOS directly

$XP_INSTALL/bin/server.sh dev Windows directly$XP_INSTALL/bin/server.sh dev

### Continuous building

Gradle also supports a continuous build mode. This will monitor your project assets for changes and run the specified task when something changes.

To use this with the deploy task, simply run the following command:

./gradlew deploy --continuous

This will deploy and reload the application on the server when something changes in your project. The continuous deployment mode is most useful when coding Java, or other changes that require a full compile and re-deploy.

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