This PR adds a new way of declaring supported platforms for packages. Previously individual build, host, and target values needed to be set for a given platform combination. Now, a platform spec can be written to generate many platform combinations.
This allows for easy mapping of all possible systems with `@all`, linux systems with `@linux` or any other available alias of `lib.systems.doubles.<alias>` by using `@<alias>`. In addition, you can use `@build` and `@host` to lock either the host or target respectively to match the prior platform.
Reviewed-on: #15
people were denied permission to clone aux repos to their store when building
from source if they didn't have an account with a correct local ssh setup.
Co-authored-by: austreelis <git@swhaele.net>
Reviewed-on: #17
Co-authored-by: Austreelis <austreelis@noreply.git.auxolotl.org>
Co-committed-by: Austreelis <austreelis@noreply.git.auxolotl.org>
