110 lines
2.4 KiB
Nix
110 lines
2.4 KiB
Nix
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{ lib, pkgs }:
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rec {
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/*
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Every following entry represents a format for program configuration files
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used for `settings`-style options (see https://github.com/NixOS/rfcs/pull/42).
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Each entry should look as follows:
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<format> = <parameters>: {
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# ^^ Parameters for controlling the format
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# The module system type most suitable for representing such a format
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# The description needs to be overwritten for recursive types
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type = ...;
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# generate :: Name -> Value -> Path
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# A function for generating a file with a value of such a type
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generate = ...;
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});
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*/
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json = {}: {
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type = with lib.types; let
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valueType = nullOr (oneOf [
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bool
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int
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float
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str
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(attrsOf valueType)
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(listOf valueType)
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]) // {
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description = "JSON value";
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};
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in valueType;
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generate = name: value: pkgs.runCommandNoCC name {
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nativeBuildInputs = [ pkgs.jq ];
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value = builtins.toJSON value;
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passAsFile = [ "value" ];
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} ''
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jq . "$valuePath"> $out
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'';
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};
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# YAML has been a strict superset of JSON since 1.2
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yaml = {}:
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let jsonSet = json {};
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in jsonSet // {
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type = jsonSet.type // {
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description = "YAML value";
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};
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};
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ini = { listsAsDuplicateKeys ? false, ... }@args: {
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type = with lib.types; let
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singleIniAtom = nullOr (oneOf [
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bool
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int
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float
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str
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]) // {
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description = "INI atom (null, bool, int, float or string)";
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};
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iniAtom =
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if listsAsDuplicateKeys then
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coercedTo singleIniAtom lib.singleton (listOf singleIniAtom) // {
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description = singleIniAtom.description + " or a list of them for duplicate keys";
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}
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else
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singleIniAtom;
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in attrsOf (attrsOf iniAtom);
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generate = name: value: pkgs.writeText name (lib.generators.toINI args value);
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};
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toml = {}: json {} // {
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type = with lib.types; let
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valueType = oneOf [
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bool
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int
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float
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str
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(attrsOf valueType)
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(listOf valueType)
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] // {
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description = "TOML value";
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};
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in valueType;
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generate = name: value: pkgs.runCommandNoCC name {
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nativeBuildInputs = [ pkgs.remarshal ];
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value = builtins.toJSON value;
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passAsFile = [ "value" ];
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} ''
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json2toml "$valuePath" "$out"
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'';
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};
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}
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