This is more like unexpected behaviour than an actual bug, but 'bug' is the closest fit. I ran spack mirror create --all expecting it to mirror "all packages in the current environment", but it only mirrors the user_specs for the environment not all_specs.

Passing through a combination of --all --dependencies doesn't mirror everything either.

For me the expected behaviour of --all or --all --dependencies would be to mirror everything in the current environment, so everything in all_specs not just user_specs.

I made a fork that allows you to run spack mirror create --dependencies to mirror everything non-external, and was going to do a PR but maybe my expectation is wrong and this is supposed to behave as it currently does 😛

Is there another way to mirror everything in an environment that I'm not aware of, or is it worth me making this PR?

Edit: if this does have to be a new flag, the options I can think of are:

• spack mirror --dependencies with an environment activated fetches everything in all_specs (what I do in my fork); currently this throws a No packages were specified error so adding this in as an option wouldn't break people's existing workflows as it's new.
• spack mirror --all with an environment activated fetches everything in all_specs, with a new --user flag that behaves the same way as --all currently does, might confuse people used to the current behaviour.
• spack mirror --all --dependencies might make more sense, but it could change existing behaviour as passing --all --dependencies currently 'works' but ignores the flags.