Only offer "show diffoscope" if has_diffoscope is true

See merge request !3

chore: update clap to v4

Closes #3

See merge request !2

Closes: #3



Signed-off-by: Leonidas Spyropoulos <artafinde@archlinux.org>

Fully support filtering packages, and specifying specific package to filter by name

See merge request !1

Following the great guidance for the other fields in the repo, this
commit adds documentation in the README and man page for the --pkgnames
field proposed in these commits.

Signed-off-by: David Vernet <void@manifault.com>

As specified in [0], it would be useful to query only for specific
packages. This commit adds support for doing so via a new --pkgnames
flag which takes a comma-delimited list of package names to filter by.

[0]: #2



Signed-off-by: David Vernet <void@manifault.com>

When querying packages and filtering using the --filter option, we
currently only filter when we print the results. Later, however, we end
up printing statistics for the full vector of packages. This is
confusing behavior -- a user that's intentionally filtering by specific
packages probably only cares about those packages. Let's instead add
logic to prune the vector of packages so that the packages passed to
print_results() are the ones we actually want to count and print.

Signed-off-by: David Vernet <void@manifault.com>