1. Use this at your own risk. Cyanogenmod received a cease and desist letter from Google when they included Google Apps in their ROM. See: A Note on Google Apps for Android
2. This project is in no way affiliated with, sponsored by, or related to Google.

1. Add the build system, and the wanted sources to your manifest.

Find your manifest file (check inside ${ANDROID_BUILD_TOP}/.repo/manifest/) and add the following towards the end:

<remote name="opengapps" fetch="https://github.com/opengapps/"  />

<project path="vendor/opengapps/build" name="aosp_build" revision="master" remote="opengapps" />
<project path="vendor/opengapps/sources/all" name="all" clone-depth="1" revision="master" remote="opengapps" />

<!-- arm64 depends on arm -->
<project path="vendor/opengapps/sources/arm" name="arm" clone-depth="1" revision="master" remote="opengapps" />
<project path="vendor/opengapps/sources/arm64" name="arm64" clone-depth="1" revision="master" remote="opengapps" />

<project path="vendor/opengapps/sources/x86" name="x86" clone-depth="1" revision="master" remote="opengapps" />
<project path="vendor/opengapps/sources/x86_64" name="x86_64" clone-depth="1" revision="master" remote="opengapps" />

2. Set the desired OpenGapps variant

In your device/manufacturer/product/device.mk file, in the beginning, add:

GAPPS_VARIANT := <variant>

where <variant> is one of the package types in lowercase. E.g:

GAPPS_VARIANT := stock

3. Include the opengapps-packages.mk file

The opengapps-packages.mk file will make the Android build system build the necessary PRODUCT_PACKAGES, and include the necessary PRODUCT_COPY_FILES.

In device/manufacturer/product/device.mk file, towards the end, add:

$(call inherit-product, vendor/opengapps/build/opengapps-packages.mk)

4. Build Android

You can add packages from versions higher then your set version. E.g. if you want to include Chrome, but you use GAPPS_VARIANT := micro

In your device/manufacturer/product/device.mk just add, for example:

PRODUCT_PACKAGES += Chrome

This uses the module name. You can find the module name for a package by checking vendor/opengapps/build/modules/ and look at the LOCAL_MODULE value.

You can exclude certain packages from the list of packages associated with your selected OpenGapps variant. E.g. if you have GAPPS_VARIANT := stock and want all those apps installed except for Hangouts, then in your device/manufacturer/product/device.mk just add:

GAPPS_EXCLUDED_PACKAGES := Hangouts

You can force GApps packages to override the stock packages. This can be defined in two ways inside device/manufacturer/product/device.mk.

For all package:

GAPPS_FORCE_PACKAGE_OVERRIDES := true

If you want to include WebViewGoogle on a non-stock build you need:

GAPPS_FORCE_WEBVIEW_OVERRIDES := true

If you want to include Messenger on a non-stock build you need:

GAPPS_FORCE_MMS_OVERRIDES := true

If you want to include Google Dialer on a non-stock build you need:

GAPPS_FORCE_DIALER_OVERRIDES := true

If you want to include Chrome on a non-full build you need:

GAPPS_FORCE_BROWSER_OVERRIDES := true

If you want use PixelLauncher overriding GoogleHome you need:

GAPPS_FORCE_PIXEL_LAUNCHER := true

On a per-app basis, add the GApps package to GAPPS_PACKAGE_OVERRIDES. Example:

GAPPS_PACKAGE_OVERRIDES := Chrome

You can tell the GApps packages not to override the stock packages. This can be defined inside device/manufacturer/product/device.mk by adding the GApps package to GAPPS_BYPASS_PACKAGE_OVERRIDES. Example:

GAPPS_BYPASS_PACKAGE_OVERRIDES := Chrome

By default, the latest package version will be selected with the closest DPI. You can force the system to select either a matching DPI package or "nodpi" package even if it is not the latest version.

This can be defined inside device/manufacturer/product/device.mk using:

GAPPS_FORCE_MATCHING_DPI := true

It is possible to build Android with dex preoptimization. This results in a quicker boot time, at the cost of additional storage used on /system.

This is normally done by setting the value:

WITH_DEXPREOPT := true

in BoardConfig.mk. This will, by default, if set to true, also enable DEX Preoptimization for Google Apps.

You can disable this entirely by setting:

DONT_DEXPREOPT_PREBUILTS := true

When building in an AOSP tree, the build system processes the file device/manufacturer/product/device.mk very early, which means that the file vendor/opengapps/build/opengapps-packages.mk is also processed very early. This causes two special build "functions" (generic build rules) to be defined before any Android.mk files are read:

BUILD_GAPPS_PREBUILT_APK # - for apps
BUILD_GAPPS_PREBUILT_SHARED_LIBRARY # - for shared libraries

The definitions use the already existing AOSP build infrastructure for prebuilt APKs and SHARED_LIBRARYs, but remove a lot of the boilerplate.

The build rules take care of locating the correct APK/libraries in an architecture-independent way. The AOSP based build system already prioritizes SoC architecture. E.g. if it finds an apk in sources/arm64 and sources/arm, it will automatically prioritize sources/arm64.

The APK rule will also scan the APK for any libraries, and if it finds libraries it will get the AOSP build system to automatically extract them and place them at the expected place.

With reference to the package comparison, currently only package overrides has been setup for a GAPPS_VARIANT of micro or lower, + Chrome.

Pull requests to add package overrides for more modules is welcome. See modules/Chrome/Android.mk for an example.

Run these commands:

cd build
curl https://raw.githubusercontent.com/opengapps/aosp_build/master/patches/Lollipop/0001-Fix-Chrome.patch | git am -

(Patch only tested on 5.1.1 r37).