Raspberry Pi 5 Talos Builder

Forked from talos-rpi5/talos-builder and modified as follows.

• Add changes from PR #20, specifically for multiple extensions
• Add iscsi-tools extension
• Modify talos Makefile to accomodate local build environment

The motiviation to do this is to build a Talos RPi 5 cluster with NVMe drives for use with Longhorn.

Build environment

• MacOS 26 on Apple M2 Pro
• crane 0.20.7
• Docker 28.3.2
• git 2.50.1
• gmake 4.4.1

Pre-build tasks

# Log into GitHub
docker login ghcr.io

# set GitHub token (for crane push)
export GITHUB_TOKEN=<secret>

# Clone all dependencies and apply patches
gmake checkouts patches

# Modify talos Makefile due to [known issue](https://github.com/docker/buildx/issues/2733)
gsed -i 's/rewrite-timestamp=true/rewrite-timestamp=false/' checkouts/talos/Makefile

# Replace `sed` with `gsed` in talos Makefile
gsed -i 's/\ sed\ /\ gsed\ /g' checkouts/talos/Makefile

# commit changes locally so the build is not flagged as dirty
git commit -am "fixes for local build env"

Building

Modified build notes

# Builds the Linux Kernel (can take a while)
gmake REGISTRY=ghcr.io REGISTRY_USERNAME=apfuzz kernel

# Builds the overlay (U-Boot, dtoverlays ...)
gmake REGISTRY=ghcr.io REGISTRY_USERNAME=apfuzz overlay

# Change visibility of sbc-raspberrypi5 package to public

# Final step to build the installer and disk image
gmake REGISTRY=ghcr.io REGISTRY_USERNAME=apfuzz installer

# Change visibility of installer package to public