CHANGES WITH 12:
* The `qemu` assembler now supports the `VHDX` image format. This is the
preferred format for AWS targets, so it is a natural fit for our
assemblers.
* The `grub2` stage now disables the legacy compatibility by default.
You have to explicitly enable it in the stage options if you require
it.
* Additionally, the `grub2` stage now also has a `uefi.install` option
to control whether it installs the UEFI configuration from the build
tree into the target tree. Furthermore, a new option called
`write_defaults` controls whether default options are written to
`/etc` (enabled by default).
* The `dnf` stage was removed. The `rpm` stage fully replaces all its
functionality.
* The `fedora27` runner is no longer supported. Fedora 30 is the minimum
required host version for Fedora systems.
* Add OSTree integration. This includes multiple stages and sources
which allow to export osbuild trees as ostree commits, or import
ostree commits into an osbuild pipeline:
* org.osbuild.rpm-ostree: This stage uses `rpm-ostree compose` to
post-process a tree and prepare it for
committing to ostree.
* org.osbuild.ostree.commit: A new assembler that takes a tree that
conforms to the ostree layout and
turns it into an ostree commit.
* org.osbuild.ostree: A new source that provides external ostree
commits to a pipeline.
* org.osbuild.ostree: A new stage that takes an ostree commit and
prepares the working directory with its
content.
* The `osbuild` binary now has an `--output-directory=DIR` argument
which allows to specify a directory where to put the output of the
pipeline assembler. This is optional for now, but will be made
mandatory in the future.
* A new stage called `org.osbuild.first-boot` allows to control the
execution of scripts at the first bootup of the generated images.
Contributions from: Christian Kellner, David Rheinsberg, Major Hayden,
Ondřej Budai, Tom Gundersen
- Berlin, 2020-04-15