Hi all, I'm involved in a new project to produce some OS images for unusual targets, and since the Baserock reference systems are great for this I'd like to reuse them. There's a requirement to use BuildStream on our side, so following on from Tristan's proposal of adopting BuildStream in Baserock[1] I started looking at converting the whole definitions repo. A while back Tristan wrote the conversion tool defs2bst[2] which seems to work well. And Javier already set up a GitLab CI pipeline[3] to convert the gnome-system to BuildStream then try to build it. So far this has turned up some bugs but is a bit out of date. What I have done is a manual conversion in a branch of definitions.git, which is here: <https://gitlab.com/baserock/definitions/tree/sam/buildstream> The defs2bst script works well for nearly everything but you can see in the commit log that a few manual fixes were needed. The old Baserock definitions are moved to `old/`, and converted BuildStream defintions are in `elements/`. The converted systems are in the elements/systems dir. Not all systems are converted and probably never will be. If I've missed one that you care about please reply here. Only the x86_64 conversions are done, and I think all the platform-specific stuff needs to be manually converted in order to reduce duplication and take advantage of BuildStream's 'variants' feature. I've not looked into how best to do this yet. The devel-system is the only one that has a deployment target, `systems/devel-system-image.bst`. This is based on what Tristan did for the gnome-system conversion. The BuildStream project is currently working on integrating support for image deployments into the tool itself, get involved there if you're interested in deploying images. The `convert` script in the top directory can be used to redo the conversion, it will need some tweaking but this makes it possible to keep up with changes on the 'master' branch of definitions.git. Keep an eye on `git diff` before committing updates to avoid un-doing the various manual fixes. I don't know if I'll be driving this migration further or not at this point. I do hope that we can keep moving this forward though. I'm interested in hearing views from people who are actively using the Baserock definitions.git repo about this migration and what blockers you see to merging this branch to 'master' and switching to BuildStream as a build tool. Thanks Sam [1] https://listmaster.pepperfish.net/pipermail/baserock-dev-baserock.org/201... [2] https://gitlab.com/BuildStream/defs2bst/ [3] https://gitlab.com/baserock/definitions/blob/jjardon/bst2/.gitlab-ci.yml -- Sam Thursfield, Codethink Ltd. Office telephone: +44 161 236 5575