CalyxOS includes microG by default. However, since it is an Android app built using the gradle build system, which the AOSP build system does not support, we build it separately and include a prebuilt APK for the OS build.

Preparation

cd ~/calyxos/android16-qpr2
cd external/microg/GmsCore
git fetch --tags
export JAVA_OPTS="-Xmx2048m"

You will need a local.properties configuration file for Mapbox and Positon API keys.

You can copy the local.properties.example file to local.properties and modify it with your own keys.

For development, you can simply put in dummy values like the ones in the example file, however that will break Maps inside apps and result in non functioning Positon location provider.

Build

./gradlew --no-daemon assembleMapboxDefaultRelease
./gradlew --no-daemon assembleDefaultRelease

Copy

cd ~/calyxos/android16-qpr2
cp external/microg/GmsCore/play-services-core/build/outputs/apk/mapboxDefault/release/play-services-core-mapbox-default-release.apk prebuilts/calyx/microg/GmsCore/
cp external/microg/GmsCore/vending-app/build/outputs/apk/default/release/vending-app-default-release-unsigned.apk prebuilts/calyx/microg/GmsCore/