Re: [PATCH 07/24] gnu: compression: Add snappy.

[David Craven]

> I wonder, are there any drawbacks of making the linter check that the
> URL provides the data named by the hash?

That may be useful. I think if guix refresh would accept a version
flag, and possibly a force flag, that would also be useful.

The version flag would be used as follows:

guix refresh qtbase -u --version=5.7.0

If the version is already set to 5.7.0 a -f flag would download and
update the hash anyway. This is useful when the download url has
changed, but the version hasn't as in the snappy example. I think
these two features could make guix refresh more generally applicable,
to packages that don't have an automatic updater.