Build LineageOS

https://wiki.lineageos.org/devices/oneplus3/build https://dzx.fr/blog/how-to-compile-the-wireguard-kernel-module-for-lineageos/

Preparing environment

I'll be using a container to keep my main system clean

Adapted from How to build LineageOS inside a container

$ podman run -itd --name lineageos-build \
    -v /mnt/storage/lineageos-build:/var/lineageos-build \
    -v /home/marc/lineageos-cache:/var/lineageos-cache \
    docker.io/ubuntu:jammy-20220531

Enter the newly created container
$ podman exec -it lineageos-build bash

Install the necessary packages
# apt update
# apt install bc bison build-essential ccache curl flex g++-multilib gcc-multilib git gnupg gperf imagemagick lib32ncurses5-dev lib32readline-dev lib32z1-dev liblz4-tool libncurses5 libncurses5-dev libsdl1.2-dev libssl-dev libxml2 libxml2-utils lzop pngcrush rsync schedtool squashfs-tools xsltproc zip zlib1g-dev python-is-python3 vim

Add an unpriviledged user for building
Make sure it can access the lineageos folders mounted
# adduser --disabled-password (user)
# chown (user):(user) -R /var/lineageos-*
# su exu

Set cache and export to bashrc
Create the file ~/.config/ccache/ccache.conf

max_size = 30G
cache_dir = /var/lineageos-cache

$ echo 'export USE_CCACHE=1' >> ~/.bashrc

Install repo tool

$ mkdir -p ~/.local/bin/
$ source ~/.profile

$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/.local/bin/repo
$ chmod a+x ~/.local/bin/repo

$ git config --global user.email mrc@frm01.net
$ git config --global user.name RealStickman

Get source lineage code

$ mkdir -p /var/lineageos-build/lineage/
$ cd /var/lineageos-build/lineage/

Initialize the repo
$ repo init -u https://github.com/LineageOS/android.git -b lineage-18.1

Sync repo content
This can take a long time
$ repo sync --force-sync

Repo fetches the latest version automatically, so we can use a symlink
$ ln -sf /var/lineageos-build/lineage/.repo/repo/repo ~/.local/bin/repo

Download device source files

Activate the build environment
$ . ./build/envsetup.sh

Finally, download device specific source files
$ breakfast DEVICE_CODENAME

Start build

Full build
$ brunch marlin

Kernel only
$ mka bootimage

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