40 lines
1.3 KiB
Nix
40 lines
1.3 KiB
Nix
self: { lib, config, pkgs, ... }: with lib; let
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relativePath = path: assert types.path.check path;
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with builtins; strings.removePrefix ("${toString self}") (toString path);
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impurityGroupEnabled = group: let
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impurityGroups = strings.splitString " " (builtins.getEnv "IMPURITY_GROUPS");
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in group == "" || builtins.elem group impurityGroups;
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impurePath = let
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impurePathEnv = builtins.getEnv "IMPURITY_PATH";
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in if impurePathEnv == ""
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then throw "impurity.enable is true but IMPURITY_PATH is not set"
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else /. + impurePathEnv;
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createImpurePath = path: impurePath + (relativePath path);
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in {
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options.impurity.enable = mkOption {
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type = types.bool;
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default = false;
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description = "Enable impure symlinks";
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};
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config._module.args.impurity = rec {
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groupedLink = groupspec: path:
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assert types.path.check path; let
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groups =
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if groupspec == null
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then [ "" ]
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else if (types.listOf types.string).check groupspec
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then groupspec
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else assert types.string.check groupspec;
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strings.splitString " " groupspec;
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in if config.impurity.enable && lists.any (group: impurityGroupEnabled group) groups
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then createImpurePath path
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else path;
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link = path: groupedLink null path;
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};
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}
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