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nixos/xserver: Document xrandrHeads.apply

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It was asked by @CMCDragonkai to elaborate on that, so let's just do
this by actually providing a code comment.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
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aszlig 2017-04-24 12:02:10 +02:00
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nixos/modules/services/x11/xserver.nix
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@ -374,6 +374,8 @@ in
type = with types; listOf (coercedTo str (output: { type = with types; listOf (coercedTo str (output: {
inherit output; inherit output;
}) (submodule { options = xrandrOptions; })); }) (submodule { options = xrandrOptions; }));
# Set primary to true for the first head if no other has been set
# primary already.
apply = heads: let apply = heads: let
hasPrimary = any (x: x.primary) heads; hasPrimary = any (x: x.primary) heads;
firstPrimary = head heads // { primary = true; }; firstPrimary = head heads // { primary = true; };