Embedding the Updater with AOSP 13

You need to do the following actions to incorporate the Updater app in an AOSP project:

• To include the Updater app in your standard build process, add the following code to your base_product.mk file (or any other file you ensure is in the mainstream build process):

PRODUCT_PACKAGES += \
    fs_config_dirs_product \
    fs_config_files_product \
    group_product \
    ModuleMetadata \
    passwd_product \
    product_compatibility_matrix.xml \
    product_manifest.xml \
    selinux_policy_product \
    Updater \

• You need to modify init.rc in /system/core/rootdir, and add the following local path in your device. So, the Updater app will be able to use a local storage with encryption option to store and modify the downloaded file.

    mkdir /data/lineageos_updates 0770 system cache encryption=Require
    chown system cache /data/lineageos_updates
    chmod 0770 /data/lineageos_updates

• After each boot, the system needs a permissive policy to permit the switch between A/B partitions and other related SELinux permissions.

If you have any problem regarding the incorporation the Lineage updater app into an AOSP project, please feel free to contact us.

Server requirements

The app sends GET requests to the URL defined by the updater_server_url resource and expects as response a JSON with the following structure:

{
  "response": [
    {
      "datetime": 1230764400,
      "filename": "ota-package.zip",
      "id": "5eb63bbbe01eeed093cb22bb8f5acdc3",
      "romtype": "nightly",
      "size": 314572800,
      "url": "https://example.com/ota-package.zip",
      "version": "15.1"
    }
  ]
}

The datetime attribute is the build date expressed as UNIX timestamp.
The filename attribute is the name of the file to be downloaded.
The id attribute is a string that uniquely identifies the update.
The romtype attribute is the string to be compared with the ro.build.type property.
The size attribute is the size of the update expressed in bytes.
The url attribute is the URL of the file to be downloaded.
The version attribute is the string to be compared with the ro.build.version.release property.

Additional attributes are ignored.