Instead of using the ostree.RequestParams in the OSTReeImageOptions,
define a new struct specific to ImageOptions for the ostree parameters.
This is almost identical to the new ostree.CommitSpec but the meaning of
the parameters changes based on image type and it would not be clear if
the CommitSpec was used in all cases. For example, the parameters of
the new OSTreeImageOptions do not always refer to the same commit. The
URL and Checksum may point to a parent commit to be pulled in to base
the new commit on, while the Ref refers to the new commit that will be
built (which may have a different ref from the parent).
The ostree.ResolveParams() function now returns two strings, the
resolved ref, which is replaced by the defaultRef if it's not specified
in the request, and the resolved parent checksum if a URL is specified.
The URL does not need to be returned since it's always the same as the
one specified in the request.
The function has been rewritten to make the logic more clear.
The docstring for the function has been rewritten to cover all use cases
and error conditions.
The package sets for an image can depend on the blueprint, and
by the same logic there is no reason it should not be able to
depend on the image options.
This is so far a non-functional change, but makes a follow-up
commit simpler (though still without actually depending on
the image options to compute the package sets).
Move package set chain collation to the distro package and add
repositories to the package sets while returning the package sets from
their source, i.e., the ImageType.PackageSets() method.
This also removes the concept of "base repositories". There are no
longer repositories that are added implicitly to all package sets but
instead each package set needs to specify *all* the repositories it will
be depsolved against.
This paves the way for the requirement we have for building RHEL 7
images with a RHEL 8 build root. The build root package set has to be
depsolved against RHEL 8 repositories without any "base repos" included.
This is now possible since package sets and repositories are explicitly
associated from the start and there is no implicit global repository
set.
The change requires adding a list of PackageSet names to the core
rpmmd.RepoConfig. In the cloud API, repositories that are limited to
specific package sets already contain the correct package set names and
these are now copied to the internal RepoConfig when converting types in
genRepoConfig().
The user-specified repositories are only associated with the payload
package sets like before.
Add a new debugging / development tool `osbuild-package-sets` for
printing JSON object with all package sets of a specific distro x arch x
image type combination.
This is useful, since due to the way package sets are implemented in
composer, the actual package set of a vanilla image type is very
difficult to determine just by looking at the code.
Example usage:
`go run cmd/osbuild-package-sets/main.go -distro rhel-90 -arch x86_64
-image qcow2`
