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WSO2 invites you to contribute by checking out the source from the Subversion (SVN) source control system, building the product and making changes, and then committing your changes back to the source repository. (For more information on Subversion, see http://svnbook.red-bean.com.) The following sections describe this process:

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A WSO2 platform release is a set of WSO2 products based on the same Carbon release. For example, Turing is the platform release name for WSO2 Carbon 4.2.0 and the WSO2 products that are based on it. Usually, not all products in a platform get released at the same time, so they are released in chunks, each of which contains the Carbon release and a subset of products. For example, chunk 8 of the Turing platform release contains Carbon 4.2.0 plus Task Server 1.1.0, Data Services Server 3.2.0 and Complex Event Processor 3.1.0. When you want to build a product from source, you download and build the appropriate platform chunk. (To determine which chunk to use for a specific product version, see the Release Matrix).You  

Checking out the patches

Before checking out the product source, you need to checkout the patches related to the Carbon chunk using the following command, before checking out the product source. Replace <local-platform-directory-1> and with a meaningful name, such as wso2carbon-platform.

$ svn checkout https://svn.wso2.org/repos/wso2/carbon/kernel/branches/4.2.0/patches/ <local-platform-directory-1>

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Downloading the product source

For products based on WSO2 Carbon 4.2.0, use the below command to download the product source:

$ svn checkout https://svn.wso2.org/repos/wso2/carbon/platform/tags/turing-<release-chunk>/ <local-platform-directory-2>

Replace <release-chunk> with the release chunk, on which the specific product version is based on. To find out the respective release chunk, see the Release Matrix. For example, for products based on Chunk 08 of WSO2 Carbon 4.2.0, the command is as follows:

$ svn checkout https://svn.wso2.org/repos/wso2/carbon/platform/tags/turing-chunk08/ <local-platform-directory-2>

Building the product 

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build build

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1. Install Maven and JDK. See Installation Prerequisites for compatible versions.
   
2. Set the environment variable  MAVEN_OPTS="-Xms1024m -Xmx4096m -XX:MaxPermSize=1024m" to avoid the Maven OutOfMemoryError.

3. Navigate to each folder representing the patches within the  <local-platform-directory-1> and run the following Apache Maven commands to build the patches. For information on the patches, which are applicable for the respective Carbon chunk release, go to Release Matrix. 

   This command...	Creates...
   mvn clean install	The binary and source distributions of the chunk release.
   mvn clean install -Dmaven.test.skip=true	The binary and source distributions, without running any of the unit tests.
   mvn clean install -Dmaven.test.skip=true -o	The binary and source distributions, without running any of the unit tests, in offline mode. This can be done only if you've already built the source at least once.

4. To For products based on Carbon 4.2.0, to create complete release artifacts of the products released with this chunk version, including the binary and source distributions, go to    <local-platform-directory-2> /repos/wso2/carbon/platform/tags/ turing-<release-chunk08chunk>/product-releases/ chunk-08 directory   and run the Apache Maven commands stated in the above step.  To build only a selected product/s , open   <local-platform-directory-2>/repos/wso2/carbon/platform/tags/turing-<release-chunk08chunk>/product-releases/chunk-08/products/pom.xml  file, and comment out the products you do not want to build and run the relevant Maven command.

Setting up your development environment

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