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README.md

Reinstall Magisk on Lineageos

This is a fork.

This little bash script is used to reinstall magisk, which gets uninstalled after each LineageOS update.

Before I had to patch once more the boot using the Magisk app doing all the steps manually, making some mistakes along the way. Now it takes less than 3 minutes to reinstall magisk (virtually all the time is taken by the download), and without any intervention on my part.

So now I can update my LineageOS phone every week without any hassle.

My solution is based on the official installation guide of Magisk.

Warning

This script is written in bash, so as any bash script it is run with the same permissions than your current user. Moreover it needs root privileges on your phone to run.

So it may screw up both your computer and your phone, so I invite you to check its source code before running it and using it at your own risks!

Docker

We use docker to make it fastly reproducible. Steps:

  1. Build
    docker build -t magiskupdate .
  2. Run
    docker run --privileged --env ADB_DEVICE=<PUT YOUR ADB ADDR HERE> magiskupdate
    or, if you're lazy do: docker run --privileged magiskupdate

Bash

Bash is one of the standard shells on Linux and MacOS systems.

If on Windows, you should run linux.

Installation

  1. Clone this repo somewhere on your computer (ex: git clone https://github.com/NicolasWebDev/reinstall-magisk-on-lineageos)
  2. Edit the script to set both variables at the beginning of the program.

Usage

  1. Download an update of LineageOS on your phone.
  2. Install the update on your phone. The device should reboot automatically. After this step Magisk is no more installed on your phone.
  3. Connect your phone to your computer.
  4. Run bash reinstall-magisk-on-lineageos in the root of this project.

How it works

The script should be pretty readable and self-explanatory, without any bash knowledge. To sum it up, it downloads the right LineageOS build on your pc (the same one that you have just installed), extracts the boot.img image from the archive, transfers it on your phone, uses the Magisk app installed on your phone to patch the boot.img image, reboots the phone in fastboot mode, then flashes the patched boot image and restarts the device.

Different methods of extracting the boot.img file

There are 3 different methods to extract the boot.img file, depending on your particular device. In this LineageOS wiki article you can find more details on these methods.

This script currently supports extracting from block-based OTAs and from payload-based OTAs. File-based OTAs are not yet supported.

Limitations

See the current issues in the issue tracker of this repo.