This ISO builder is fork of the good work from the elementary crew. Many thanks to the devs there https://github.com/elementary/os
As Ubuntu Sway is built with the Debian version of live-build, not the Ubuntu patched version, it's easiest to build an Ubuntu Sway .iso in a Debian VM or container. This prevents messing up your host system too.
The following example uses Docker and assumes you have Docker correctly installed and set up:
Clone this project & cd into it:
git clone https://github.com/Ubuntu-Sway/iso-builder && cd iso-builder
Configure the channel in the etc/terraform.conf (unstable, stable).
Run the build:
docker run --privileged -i -v /proc:/proc \
-v ${PWD}:/working_dir \
-w /working_dir \
debian:latest \
/bin/bash -s etc/terraform.conf < build.sh
When done, your image will be in the builds folder.
More information about the concepts behind live-build and the technical decisions made to arrive at this set of tools to build an .iso can be found on the wiki.