49 lines
1.2 KiB
Nix
49 lines
1.2 KiB
Nix
{
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lib,
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revInfo ? "",
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}: let
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inherit
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(lib)
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mkOption
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types
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;
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# A best effort, lenient estimate. Please use a recent nixpkgs lib if you
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# override it at all.
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minVersion = "23.05pre-git";
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isNixpkgsValidVersion =
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(builtins.compareVersions lib.version minVersion < 0)
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# XXX: TODO: make this message snow specific
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|| abort ''
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The nixpkgs-lib dependency of flake-parts was overridden but is too old.
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The minimum supported version of nixpkgs-lib is ${minVersion},
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but the actual version is ${lib.version}${revInfo}.
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'';
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in
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assert isNixpkgsValidVersion; {
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# Helper function for defining a per-system option that
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# gets transposed by the usual flake system logic to a
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# top-level outputs attribute.
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mkPerSystemFlakeOutput = {
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name,
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option,
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file,
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}: {
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_file = file;
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options = {
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outputs.${name} = mkOption {
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type = types.attrsWith {
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elemType = option.type;
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lazy = true;
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placeholder = "system";
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};
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default = {};
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description = ''
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See {option}`perSystem.${name}` for description and examples.
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'';
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};
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};
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};
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}
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