experimental compose build-chunked-oci

Currently this project supports rpm-ostree compose image which is a highly opinionated tool which consumes treefiles and outputs an OCI archive.

However, it does not support common container-native workflows such as copying content from a distinct container image.

The rpm-ostree experimental compose build-chunked-oci command accepts an arbitrary input container image, and synthesizes a bootc (ostree container) ready image from it.

At the current time, it is recommended that the input container image be derived from a reference maintained base image, such as the fedora-bootc ones. Especially if you are targeting bootc systems with this, please follow https://gitlab.com/fedora/bootc/tracker/-/issues/32.

Running

This command expects a container image already fetched into a containers-storage: instance, and can output to containers-storage: or oci.

podman build -t quay.io/exampleos/exampleos:build ...
...
rpm-ostree experimental compose build-chunked-oci --bootc --format-version=1 \
           --from=quay.io/exampleos/exampleos:build --output containers-storage:quay.io/exampleos/exampleos:latest
podman push quay.io/exampleos/exampleos:latest