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Applying service packs to the product

Carbon From version 4.2.0 onwards, Carbon Kernel supports service packs. A service pack is a collection of patches in a single pack. It contains two elements:

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1. Copy the service pack file to the <PRODUCT_HOME>/repository/components/servicepacks/ directory. For example, the image below shows how a new service pack named servicepack001 is added to this directory. 
   
2. Start your product. The following steps will be executed:

   1. Before applying any patches, the process first creates a backup folder named patch0000 inside the <PRODUCT_HOME>/repository/components/patches/ directory, which will contain the original content of the <PRODUCT_HOME>/repository/components/plugins/ directory. This step enables you to revert back to the previous state if something goes wrong during operations.
      

   2. The latest service pack in the <PRODUCT_HOME>/repository/components/servicepacks/ directory will be applied. That is, the patches in the service pack will be applied to the <PRODUCT_HOME>/repository/components/plugins/ directory.

   3. In addition to the service pack, if there are individual patches added to the <PRODUCT_HOME>/repository/components/patches/ directory, those will also be incrementally applied to the plugins directory. 
      

      Info
      The metadata file available in the service pack will maintain a list of the applied patches by service pack. Therefore, the metadata file information will be compared against the <PRODUCT_HOME>/repository/components/patches/ directory, and only the patches that were not applied by the service pack will be incrementally applied to the plugins directory.

Applying individual patches to the product

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