The operating system source tree includes hundreds of repositories. Many of these + are only used for debugging, testing or development and are not actually part of what + gets used for building a production release. The manifest repository references all of + these. Most of these are used unmodified from the Android Open Source Project (AOSP). + A few dozen of the repositories including most of the core OS are either forked from + AOSP or are unique to GrapheneOS.
+ +The operating system has a unified build system, but some components like + Chromium are too complex to fit into it so they're included as prebuilts instead + of porting them to the AOSP build system. This is also done for developer + convenience and bootstrapping, to avoid needing to build all the native / + cross-compilation toolchains for each host and target platform combination, etc. + The prebuilts can all be built from source if desired. The build instructions will + be expanded to cover all of this in the future.
+ +For a full list of the repositories in the OS source tree, look at the + default.xml + list in the manifest repository.
+Subset of the forks of AOSP repositories:
The operating system source tree includes hundreds of repositories. Many of these - are only used for debugging, testing or development and are not actually part of what - gets used for building a production release. The manifest repository references all of - these. Most of these are used unmodified from the Android Open Source Project (AOSP). - A few dozen of the repositories including most of the core OS are either forked from - AOSP or are unique to GrapheneOS. The operating system has a unified build system, but - some components like Chromium are too complex to fit into it so they're included as - prebuilts instead of porting them to the AOSP build system. This is also done for - developer convenience and bootstrapping, to avoid needing to build all the native / - cross-compilation toolchains for each host and target platform combination, etc. The - prebuilts can all be built from source if desired. The build instructions will be - expanded to cover all of this in the future.