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47 lines
1.4 KiB
Nix
47 lines
1.4 KiB
Nix
{ pkgs, lib }:
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{
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inherit (pkgs.lib.generators) toYAML;
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/* Read YAML files into a Nix expression similar to lib.importJSON and
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lib.importTOML from nixpkgs standard library. Unlike both of them, this
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unfortunately relies on an import-from-derivation (IFD) so it isn't exactly
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perfect but it is very close.
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This relies on yaml2json which uses the following YAML library which you
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can view the following link for more details on YAML compatibility.
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https://pkg.go.dev/gopkg.in/yaml.v3#readme-compatibility
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Type: importYAML :: Path -> any
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*/
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importYAML = path:
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let
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data = pkgs.runCommand "convert-yaml-to-json" { } ''
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${pkgs.lib.getExe' pkgs.yaml2json "yaml2json"} < ${path} > $out
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'';
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in
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pkgs.lib.importJSON data;
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/* Convert a given decimal number to a specified base digit with the set of
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glyphs for each digit as returned from lib.toBaseDigits.
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Type: toBaseDigitWithGlyphs :: Int -> Int -> Attrs -> String
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Example:
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toBaseDigitWithGlyphs 24 267 {
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"0" = "0";
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# ...
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"22" = "L";
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"23" = "M";
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"24" = "N";
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}
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*/
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toBaseDigitsWithGlyphs = base: i: glyphs:
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let
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baseDigits = pkgs.lib.toBaseDigits base i;
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toBaseDigits = d: glyphs.${builtins.toString d};
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in
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pkgs.lib.concatMapStrings toBaseDigits baseDigits;
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}
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