In order to build the plugin, you must build & install the sdk, an easy way to do this is to install the the packages you produced in the previous two steps . Navigate to the build output directory for the agent and install the agent package . ```markdown > cd /tmp/build-deliveryoptimization-agent/linux-debug/ > sudo apt-get install ./deliveryoptimization-agent*.deb ``` . The sdk produces a runtime and development package, in this case you'll want to install both Navigate to build output directory for the sdk and install both packages . ```markdown > cd /tmp/build-deliveryoptimization-sdk/linux-debug/ > sudo apt-get install ./libdeliveryoptimization*.deb ``` . With the sdk installed, you can now build the plugin by navigating back to the project root . ```markdown > cd <project root> > python3 build/build.py --project plugin-apt --package-for deb ``` . At this point, you should have built and packaged all components . ### Installing DO Client components . There are a couple ways for you to install the DO client components . 1. If you have built the component into a debian package, you can simply find the debian package and install like detailed above. This will handle installing to the appropriate paths, and also the necessary setup of DO user/group permissions needed for DO-agent. . ```markdown > cd /tmp/build-deliveryoptimization-sdk/linux-debug/ > sudo apt-get install ./libdeliveryoptimization*.deb > cd /tmp/build-deliveryoptimization-agent/linux-debug/ > sudo apt-get install ./deliveryoptimization-agent*.deb > cd /tmp/build-deliveryoptimization-plugin-apt/linux-debug/ > sudo apt-get install ./deliveryoptimization-plugin-apt*.deb ``` . 2. If you build and install using cmake, or through some other custom means, be sure to setup the DO user/groups correctly in your installation. You can reference this [script](https://github.com/microsoft/do-client/blob/main/client-lite/build/postinst.in.sh) to see how to setup the DO user/group and install DO as a daemon. . ### Testing DO Client components . As guidance, please ensure proper code coverage for project contributions Unit tests for the agent and sdk are produced as a part of the above build command, you can find them in the build output directory . ```markdown > cd /tmp/build-deliveryoptimization-agent/linux-debug/client-lite/test ``` . Our tests utilize the [GTest](https://github.com/google/googletest) unit testing framework, which supports test filtering via command line You can run all agent tests by running . ```markdown > ./deliveryoptimization-agent-tests ``` . You can filter for specific tests as well, reference the GTest documentation for filtering rules and syntax ```markdown > sudo ./deliveryoptimization-agent-tests --gtest_filter=DownloadManagerTests* ``` . The test executable for the SDK is located in the sdk build output as well . ```markdown > cd /tmp/build-deliveryoptimization-sdk/linux-debug/sdk-cpp/tests ``` . The sdk tests expect a running do-agent, you can either manually run the agent executable from its build output or install the agent package as you may have done while building the plugin You can run the sdk tests just like the agent tests . ```markdown > sudo ./deliveryoptimization-sdk-tests ``` . And filter them similarly . ```markdown > sudo ./deliveryoptimization-sdk-tests --gtest_filter=DownloadTests* ``` . ## Support . The APT plugin component is currently in a **Public Preview** state. During this phase, it will be supported for 90 days beyond the release date of a new release. At the end of the 90 day window, we will not guarantee support for the previous version. Please plan to migrate to a newer release within that 90-day window to avoid any disruptions. . ## Filing a Bug . Please file a [GitHub Issue](https://github.com/microsoft/do-client/issues) to ensure all issues are tracked appropriately. . ## Build status . #### Ubuntu 18.04 . | Architecture | Agent | SDK | Plu