36 lines
1.2 KiB
Nix
36 lines
1.2 KiB
Nix
{inputs, cell}: let
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namespace = "repo";
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yamlToJsonDrv = pkgs: yamlContent: outputPath: (pkgs.runCommand
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outputPath { inherit yamlContent; nativeBuildInputs = [ pkgs.yq ]; }
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# run yq which outputs '.' (no filter) on file at yamlPath
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# note that $out is passed onto the bash/sh script for execution
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''
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echo "$yamlContent" | yq >$out
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'')
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{ });
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in {
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fromYAML = yamlContent: bulitins.fromJSON (builtins.readFile (yamlToJsonDrv inputs.nixpkgs yamlContent "fromYaml.json"));
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# ctor
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opt-some = a: [a];
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opt-none = [];
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opt-none_thunk = _: [];
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# from-to null
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opt-fromNullable = nullable: if nullable == null then [] else [nullable];
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opt-toNullable = opt-fork (a:a) (_: null);
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opt-map = builtins.map;
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opt-filter = builtins.filter;
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opt-fork = on_some: on_none: opt: if opt == [] then (on_none null) else (on_some (builtins.elemAt opt 0));
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opt-unwrap = opt-fork (a:a) (_: throw "opt-unwrap: expected some, got none");
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opt-unwrapOrElse = opt-fork (a:a);
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opt-unwrapOr = fallback_val: opt-fork (a:a) (_: fallback_val);
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opt-orElse = opt: fallback_opt: opt-fork (opt-some) (opt-none_thunk) (opt ++ fallback_opt);
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opt-leftmostSome = opts: builtins.foldl' (opt-orElse) [] opts;
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}
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