The code in `check-snapshots` will print "No snapshots cache found
at ..." regardless of the error that happens when trying to open
the file. This can be misleading if e.g. the issue is permissions
to open the file or the file is corrupted. So make the exception
more targeted and only catch FileNotFound error and let python
how the full error for the other cases. Obviously this can be
done in many ways so I'm happy to tweak and e.g. keep catching
all exception but print the value etc.
Instead of using the F34-based manifests, let's switch to F38. I tried my
best to import the vars into the new manifest, but I don't think that's
currently supported.
The `./tools` dir was not part of the LINTABLES in the `tox.ini`
which meant that pep8/pylint etc checks were not run on the tools
there.
This commit adds it and fixes the issues that `make lint` found.
This pulls the list of snapshots from the rpmrepo API, greps the
codebase for all uses of rpmrepo.osbuild.org that look like a snapshot
name, and then checks to make sure they are still valid.
This is the same script as osbuild-composer, except that it also skips
checking ./test/data/stages/ which has rpm urls that look like snapshot
urls.
