This is what upstream Gentoo does. They would previously update the
entire seed, but this took a long time. Our seeds are much bigger, so we
kept repo snapshots to build stage1 against these instead. The new
method of only rebuilding packages with changed sub-slots is a good
compromise and removes the need to write stage1 hooks that selectively
catch the repository up.
This also avoids some conflicts by adding the `--ignore-world` option.
Gentoo seeds have nothing in @world. We have much more, but none of that
is needed for stage1.
This continues to exclude cross-*-cros-linux-gnu/* as that is not needed
for stage1. It now also excludes dev-lang/rust, because it is never a
DEPEND, so it would not break other packages in this way. It may fail to
run due to a sub-slot change in one of its own dependencies, but it is
also unlikely to be needed in stage1 and it is not configured to use the
system LLVM. If needs be, we could improve the behaviour of Portage's
@changed-subslot to respect `--with-bdeps`.
In my testing, it was unable to handle an SDK from 17 months ago, but
one from 7 months ago did work. In practise, we will always use a much
more recent one, which is far more likely to work.
Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
Catalyst 4 has totally changed the way repositories are handled. It only
works when the name of the directory containing the repository matches
the configured name of that repository. This was not the case for us,
with the coreos repository residing in the coreos-overlay directory. We
wanted to move and rename our repositories anyway, but this is a big
change, so we'll do separately. For now, this just renames coreos to
coreos-overlay.
Catalyst 4 also ingests the main repository snapshot as a squashfs
rather than a tarball. It features a utility to generate such a
snapshot, but it doesn't fit Flatcar well, particularly because it
expects each ebuild repository to reside at the top level of its own git
repository. It was very easy to call tar2sqfs manually though.
Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
This hasn't been needed for a while, since Gentoo started handling
Python modules according to PEP 517. We now need util-linux with Python
support for Catalyst 4, and this hack erroneously causes the module to
be installed under /usr/lib64 rather than /usr/lib.
Signed-off-by: James Le Cuirot <jlecuirot@microsoft.com>
