User Guide

Logging in

You should have received an attic login command from an admin like the following:

attic login central https://attic.domain.tld/ eyJ...

The attic client can work with multiple servers at the same time. To select the foo cache from server central, use one of the following:

• foo, if the central server is configured as the default
• central:foo

To configure the default server, set default-server in ~/.config/attic/config.toml.

Enabling a cache

To configure Nix to automatically use cache foo:

attic use foo

This adds the binary cache to your ~/.config/nix/nix.conf and configures the credentials required to access it.

If you wish to configure Nix manually, you can view the binary cache endpoint and the cache public key:

$ attic cache info foo
               Public: true
           Public Key: foo:WcnO6s4aVkB6CKRaPPpKvHLZykWXASV6c+/Ssg8uQEY=
Binary Cache Endpoint: https://attic.domain.tld/foo
      Store Directory: /nix/store
             Priority: 41
  Upstream Cache Keys: ["cache.nixos.org-1"]
     Retention Period: Global Default

On NixOS, you can configure the cache declaratively in your system configuration with the above information:

{
  nix.settings = {
    substituters = [
      "https://attic.domain.tld/foo"
    ];
    trusted-public-keys = [
      "foo:WcnO6s4aVkB6CKRaPPpKvHLZykWXASV6c+/Ssg8uQEY="
    ];
  };
}

Disabling a cache

To configure Nix to no longer use a cache, remove the corresponding entries from the list of substituters and trusted-public-keys in ~/.config/nix/nix.conf

Pushing to the cache

To push a store path to cache foo:

attic push foo /nix/store/...

Other examples include:

attic push foo ./result
attic push foo /run/current-system