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nixos/activation: use eval-config's system argument for nesting

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This avoids a possible surprise if the user is using `nixpkgs.system`
and `nesting.children`. `nesting.children` is expected to ignore all
parent configuration so we shouldn't propagate the user-facing option
`nixpkgs.system`. To avoid doing so, we introduce a new internal
option for holding the value passed to eval-config.nix, and use that
when recursing for nesting.
This commit is contained in:
Andrew Childs 2020-03-04 23:24:22 +09:00
parent b83164a049
commit ce416779bb
3 changed files with 15 additions and 1 deletions
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6
nixos/lib/eval-config.nix
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@ -41,6 +41,12 @@ let
# default to the argument. That way this new default could propagate all
# they way through, but has the last priority behind everything else.
nixpkgs.system = lib.mkDefault system;
# Stash the value of the `system` argument. When using `nesting.children`
# we want to have the same default value behavior (immediately above)
# without any interference from the user's configuration.
nixpkgs.initialSystem = system;
_module.args.pkgs = lib.mkIf (pkgs_ != null) (lib.mkForce pkgs_);
};
};