ubuntu desktop, latest version from rpi-imager.

koen@koen-desktop:~/src$  uname -a
Linux koen-desktop 5.19.0-1011-raspi #18-Ubuntu SMP PREEMPT Thu Dec 15 11:27:47 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux


sudo apt install git
mkdir src
cd src/
git clone https://github.com/koendv/arduino-ide-raspberrypi/
###(browser) fork https://github.com/arduino/arduino-ide to https://github.com/koendv-test/arduino-ide
git clone https://github.com/kurte/arduino-ide
cd arduino-ide/
patch -p1 < ../arduino-ide-raspberrypi/self_hosted_runner.patch
git config --global user.email kurte@rockisland.com 
git config --global user.name kurte
git add .github/workflows/build.yml
git add arduino-ide-extension/scripts/download-ls.js
git commit -m arm64
git push

git tag -a 2.0.4-arm64 -m self-hosted
git push --tags

###(browser) fork https://github.com/myong34/docker-github-actions-runner
###(browser) fork https://github.com/koendv-test/docker-github-actions-runner
cd ~/src
git clone https://github.com/kurte/docker-github-actions-runner
cd docker-github-actions-runner
patch -p1 < ../arduino-ide-raspberrypi/docker-github-actions-runner.patch
###(patches fine today, but this patch sometimes has to be reworked because upstream has changed)
git add Dockerfile
git add entrypoint.sh
git commit -m arduino-ide
git push

###(browser) https://github.com/kurte/arduino-ide/settings
###- set Settings -> Moderation options -> Code review limits -> Limit to users explicitly granted read or higher access
###- Settings -> Actions -> Runnners -> New self-hosted runner -> linux -> arm64
###(Just an aside: I'd love to see "riscv" in this list)
cd ~/src
sudo apt  install curl
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo apt-get install -y uidmap
dockerd-rootless-setuptool.sh install

wget https://raw.githubusercontent.com/koendv/arduino-ide-raspberrypi/main/docker-github-actions-runner.sh
###(edit REPO_URL=https://github.com/koendv-test/arduino-ide RUNNER_URL=https://github.com/koendv-test/docker-github-actions-runner )
rm -rf docker-github-actions-runner arduino-ide
chmod +x ./docker-github-actions-runner.sh 
sudo ./docker-github-actions-runner.sh 
### Listening for Jobs

### (browser) https://github.com/koendv-test/arduino-ide/actions
### (browser) Actions -> Arduino IDE -> Enable workflow -> run workflow -> use workflow from tag 2.0.4-arm64 -> run workflow
### (on raspberry, window docker-github-actions-runner.sh) Running job: build (self-hosted)
### (browser) refresh

### Seeing "info There appears to be trouble with your network connection. Retrying..."  sdcard slow?
### (browser) https://github.com/koendv-test/arduino-ide/actions -> Arduino IDE -> download artifacts
### cd Downloads
### unzip Linux_ARM64_app_image.zip 
### chmod +x ./arduino-ide_2.0.4_Linux_ARM64.AppImage 
### sudo apt-get install zlib1g-dev  fuse libfuse-dev 
### ./arduino-ide_2.0.4_Linux_ARM64.AppImage