56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
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"use strict";
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import fs from 'fs';
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import TOML from '@ltd/j-toml';
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/**
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* Reads a pair of TOML configuration files.
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* @param {string} file_default The path to the default configuration file.
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* @param {string} file_custom The path to the custom configuration file.
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* @return {object} The parsed settings object.
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*/
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function toml_settings_read(file_default, file_custom) {
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let obj_default = toml_parse(fs.readFileSync(file_default)),
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obj_custom = toml_parse(fs.readFileSync(file_custom));
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obj_apply_recursive(obj_custom, obj_default);
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return obj_default;
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}
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/**
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* Helper function to parse a given source string of TOML into an object.
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* @param {string} source The source string to parse.
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* @return {Object} The resulting object.
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*/
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function toml_parse(source) {
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return TOML.parse(
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source, // Source string
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1.0, // Specification version
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"\n", // Multi line joiner
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Number.MAX_SAFE_INTEGER // Use big int
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);
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}
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/**
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* Merges 2 object trees, overwriting keys in target with those of source.
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* Note that target will be mutated!
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* @param {object} source The source object to merge.
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* @param {object} target The target object to merge.
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*/
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function obj_apply_recursive(source, target) {
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for(let key in source) {
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if(typeof source[key] == "object") {
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if(typeof target[key] == "undefined")
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target[key] = {};
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obj_apply_recursive(source[key], target[key]);
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continue;
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}
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target[key] = source[key];
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}
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}
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export default toml_settings_read;
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