Docker microservice for LineageOS Continuous Integration and Continous Deployment

A fair number of dependencies is needed to build LineageOS, plus a Linux system (and a discrete knowledge of it). With Docker we give you a minimal Linux build system with all the tools and scripts already integrated, easing considerably the creation of your own LineageOS build.

Moreover Docker runs also on Microsoft Windows and Mac OS, which means that LineageOS can be built on such platforms without requiring a dual boot system or a manual set up of a Virtual Machine.

The official Docker guides are well-written:

• Linux (Ubuntu, Debian, CentOS and Fedora are officially supported)
• Windows 10/Windows Server 2016 64bit
• Mac OS El Capitan 10.11 or newer

If your Windows or Mac system doesn't satisfy the requirements (or if you have Oracle VirtualBox installed, you can use Docker Toolbox. Docker Toolbox is not described in this guide, but it should be very similar to the standard Docker installation.

Once you can run the hello-world image you're ready to start!

This Docker image contains a great number of settings, to allow you to fully customize your LineageOS build. Here you can find all of them, with the default values between the brackets.

TL;DR - go to the Examples

The two fundamental settings are:

• BRANCH_NAME (cm-14.1): LineageOS branch, see the branch list here (multiple comma-separated branches can be specified)
• DEVICE_LIST: comma-separated list of devices to build

Running a build with only these two set will create a ZIP file almost identical to the LineageOS official builds, just signed with the test keys.

When multiple branches are selected, use DEVICE_LIST_<BRANCH_NAME> to specify the list of devices for each specific branch (see the examples).

There are two options for the signature spoofing patch required for microG:

• "Original" patches
• Restricted patches

With the "original" patch the FAKE_SIGNATURE permission can be granted to any user app: while it may seem handy, this is considered dangerous by a great number of people, as the user could accidentally give this permission to rogue apps.

A more strict option is the restricted patch, where the FAKE_SIGNATURE permission can be obtained only by privileged system apps, embedded in the ROM during the build process.

The signature spoofing patch can be optionally included with:

• SIGNATURE_SPOOFING (no): yes to use the original patch, restricted for the restricted one, no for none of them

If in doubt, use restricted: note that packages that requires the FAKE_SIGNATURE permission must be embedded in the build by adding them in

• CUSTOM_PACKAGES

Extra packages can be included in the tree by adding the corresponding manifest XML to the local_manifests volume.

Some proprietary files are needed to create a LineageOS build, but they're not included in the LineageOS repo for legal reasons. You can obtain these blobs in three ways:

• by pulling them from a running LineageOS
• by extracting them from a LineageOS ZIP
• by downloading them from TheMuppets repos (unofficial)

The third way is the easiest one and is enabled by default; if you're OK with that just move on, otherwise set INCLUDE_PROPRIETARY (true) to false and manually provide the blobs (not explained in this guide).

If you have a server and you want to enable OTA updates you have to provide the URL of your server during the build process with:

• OTA_URL

If you don't setup a OTA server you won't be able to update the device from the updater app (but you can still update it manually with the recovery of course).

By default, builds are signed with the Android test keys. If you want to sign your builds with your own keys (highly recommended):

• SIGN_BUILDS (false): set to true to sign the builds with the keys contained in /srv/keys; if no keys are present, a new set will be generated

Other useful settings are:

• CCACHE_SIZE (50G): change this if you want to give more (or less) space to ccache
• WITH_SU (false): set to true to embed su in the build (note that, even when set to false, you can still enable root by flashing the su installable ZIP)
• RELEASE_TYPE (UNOFFICIAL): change the release type of your builds
• BUILD_OVERLAY (false): normally each build is done on the source tree, then the tree is cleaned with mka clean. If you want to be sure that each build is isolated from the others, set BUILD_OVERLAY to true (longer build time). Requires --cap-add=SYS_ADMIN.
• LOCAL_MIRROR (false): change this to true if you want to create a local mirror of the LineageOS source (> 200 GB)
• CRONTAB_TIME (now): instead of building immediately and exit, build at the specified time (uses standard cron format)

The full list of settings, including the less interesting ones not mentioned in this guide, can be found in the Dockerfile.

Be sure the phone is tethered to a computer with Android SDK installed via USB cable. Go into the phone's settings and enable developer settings if it isn't already by tapping build number 5 times. Then go to the developer settings and enable OEM unlocking. This will allow you access to the boot loader.

Now reboot the phone into the bootloader by press and holding the power and volume down buttons. On a computer with Android SDK installed run the following commands to unlock the phone:

fastboot flashing unlock_critical
fastboot flashing unlock

Now that the phone is unlocked, boot it into recovery mode and select wipe data/factory reset. This will delete anything in storage. Restart the phone and go back to the bootloader.

On a computer run fastboot boot <twrp_image>. This is another bootloader that will be used to install Lineage OS.

Now wipe everything. Including the system. Reboot the phone into bootloader and go back to twrp.

Now run: adb push <lineage_firmware> /sdcard

Once that is on the phone go to install in the twrp bootloader and click the new zip file. It will install itself. When it is done reboot the phone. It should boot into Lineage OS.

Four apps must be present to use the chroot: fdroid (should already be there), nethunter, Term-nh, and VNC-nh. Use adb to install these to the phone: adb install <app.apk>

Once they are installed, make sure root access is allowed in the developer settings and run nethunter and accept all its permission requests.

Now to install the chroot. Restart into the bootloader and go into twrp again. This time push the nethunter zip file to /sdcard with adb. install it like you did Lineage OS. Reboot the phone when you are done and do not install the app when they ask. Verify that the chroot is there by opening nethunter and term.

You also have to provide Docker some volumes, where it'll store the source, the resulting builds, the cache and so on. The volumes are:

• /srv/src, for the LineageOS sources
• /srv/zips, for the output builds
• /srv/logs, for the output logs
• /srv/ccache, for the ccache
• /srv/local_manifests, for custom manifests (optional)
• /srv/userscripts, for the user scripts (optional)

When SIGN_BUILDS is true

• /srv/keys, for the signing keys

When BUILD_OVERLAY is true

• /srv/tmp, for temporary files

When LOCAL_MIRROR is true:

• /srv/mirror, for the LineageOS mirror

docker run \
    -e "BRANCH_NAME=cm-14.1" \
    -e "DEVICE_LIST=thea" \
    -v "/home/user/lineage:/srv/src" \
    -v "/home/user/zips:/srv/zips" \
    -v "/home/user/logs:/srv/logs" \
    -v "/home/user/cache:/srv/ccache" \
    lineageos4microg/docker-lineage-cicd

docker run \
    -e "BRANCH_NAME=lineage-15.1" \
    -e "DEVICE_LIST=dumpling" \
    -e "SIGN_BUILDS=true" \
    -e "SIGNATURE_SPOOFING=restricted" \
    -e "CUSTOM_PACKAGES=GmsCore GsfProxy FakeStore MozillaNlpBackend NominatimNlpBackend com.google.android.maps.jar FDroid FDroidPrivilegedExtension " \
    -v "/home/user/lineage:/srv/src" \
    -v "/home/user/zips:/srv/zips" \
    -v "/home/user/logs:/srv/logs" \
    -v "/home/user/cache:/srv/ccache" \
    -v "/home/user/keys:/srv/keys" \
    -v "/home/user/manifests:/srv/local_manifests" \
    lineageos4microg/docker-lineage-cicd

If there are already keys in /home/user/keys they will be used, otherwise a new set will be generated before starting the build (and will be used for every subsequent build).

The microG and FDroid packages are not present in the LineageOS repositories, and must be provided through an XML in the /home/user/manifests. This repo contains some of the most common packages for these kind of builds: to include it create an XML (the name is irrelevant, as long as it ends with .xml) in the /home/user/manifests folder with this content:

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <project name="lineageos4microg/android_prebuilts_prebuiltapks" path="prebuilts/prebuiltapks" remote="github" revision="master" />
</manifest>

docker run \
    -e "BRANCH_NAME=cm-14.1,lineage-15.1" \
    -e "DEVICE_LIST_CM_14_1=onyx,thea" \
    -e "DEVICE_LIST_LINEAGE_15_1=cheeseburger,dumpling" \
    -e "SIGN_BUILDS=true" \
    -e "SIGNATURE_SPOOFING=restricted" \
    -e "CUSTOM_PACKAGES=GmsCore GsfProxy FakeStore MozillaNlpBackend NominatimNlpBackend com.google.android.maps.jar FDroid FDroidPrivilegedExtension " \
    -e "OTA_URL=https://api.myserver.com/" \
    -v "/home/user/lineage:/srv/src" \
    -v "/home/user/zips:/srv/zips" \
    -v "/home/user/logs:/srv/logs" \
    -v "/home/user/cache:/srv/ccache" \
    -v "/home/user/keys:/srv/keys" \
    -v "/home/user/manifests:/srv/local_manifests" \
    lineageos4microg/docker-lineage-cicd

As there is no official support for this device, we first have to include the sources in the source tree through an XML in the /home/user/manifests folder; from this thread we get the links of:

• Device tree: https://github.com/dev-harsh1998/android_device_lenovo_a6000
• Common Tree: https://github.com/dev-harsh1998/android_device_lenovo_msm8916-common
• Kernel: https://github.com/dev-harsh1998/kernel_lenovo_msm8916
• Vendor blobs: https://github.com/dev-harsh1998/proprietary-vendor_lenovo

Then, with the help of lineage.dependencies from the device tree and the common tree we create an XML /home/user/manifests/a6000.xml with this content:

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <project name="dev-harsh1998/android_device_lenovo_a6000" path="device/lenovo/a6000" remote="github" />
  <project name="dev-harsh1998/android_device_lenovo_msm8916-common" path="device/lenovo/msm8916-common" remote="github" />
  <project name="dev-harsh1998/kernel_lenovo_msm8916" path="kernel/lenovo/a6000" remote="github" />
  <project name="dev-harsh1998/proprietary-vendor_lenovo" path="vendor/lenovo" remote="github" />
  <project name="LineageOS/android_device_qcom_common" path="device/qcom/common" remote="github" />
</manifest>

We also want to include our custom packages so, like before, create an XML (for example /home/user/manifests/custom_packages.xml) with this content:

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <project name="lineageos4microg/android_prebuilts_prebuiltapks" path="prebuilts/prebuiltapks" remote="github" revision="master" />
</manifest>

We also set INCLUDE_PROPRIETARY=false, as the proprietary blobs are already provided by the repo https://github.com/dev-harsh1998/prorietary_vendor_lenovo (so we don't have to include the TheMuppets repo).

Now we can just run the build like it was officially supported:

docker run \
    -e "BRANCH_NAME=lineage-15.1" \
    -e "DEVICE_LIST=a6000" \
    -e "SIGN_BUILDS=true" \
    -e "SIGNATURE_SPOOFING=restricted" \
    -e "CUSTOM_PACKAGES=GmsCore GsfProxy FakeStore MozillaNlpBackend NominatimNlpBackend com.google.android.maps.jar FDroid FDroidPrivilegedExtension " \
    -e "INCLUDE_PROPRIETARY=false" \
    -v "/home/user/lineage:/srv/src" \
    -v "/home/user/zips:/srv/zips" \
    -v "/home/user/logs:/srv/logs" \
    -v "/home/user/cache:/srv/ccache" \
    -v "/home/user/keys:/srv/keys" \
    -v "/home/user/manifests:/srv/local_manifests" \
    lineageos4microg/docker-lineage-cicd