import { existsSync, readFileSync, writeFileSync } from 'fs';
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import { resolve } from 'path';
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import { homedir } from 'os';
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import destr from 'destr';
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import flat from 'flat';
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import defu from 'defu';
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const RE_KEY_VAL = /^\s*([^=\s]+)\s*=\s*(.*)?\s*$/;
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const RE_LINES = /\n|\r|\r\n/;
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const defaults = {
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name: ".conf",
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dir: process.cwd(),
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flat: false
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};
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function withDefaults(options) {
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if (typeof options === "string") {
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options = { name: options };
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}
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return { ...defaults, ...options };
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}
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function parse(contents, options = {}) {
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const config = {};
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const lines = contents.split(RE_LINES);
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for (const line of lines) {
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const match = line.match(RE_KEY_VAL);
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if (!match) {
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continue;
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}
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const key = match[1];
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if (!key || key === "__proto__" || key === "constructor") {
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continue;
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}
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const val = destr(match[2].trim());
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if (key.endsWith("[]")) {
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const nkey = key.substr(0, key.length - 2);
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config[nkey] = (config[nkey] || []).concat(val);
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continue;
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}
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config[key] = val;
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}
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return options.flat ? config : flat.unflatten(config, { overwrite: true });
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}
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function parseFile(path, options) {
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if (!existsSync(path)) {
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return {};
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}
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return parse(readFileSync(path, "utf-8"), options);
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}
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function read(options) {
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options = withDefaults(options);
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return parseFile(resolve(options.dir, options.name), options);
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}
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function readUser(options) {
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options = withDefaults(options);
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options.dir = process.env.XDG_CONFIG_HOME || homedir();
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return read(options);
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}
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function serialize(config) {
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return Object.entries(flat.flatten(config)).map(([key, val]) => `${key}=${typeof val === "string" ? val : JSON.stringify(val)}`).join("\n");
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}
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function write(config, options) {
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options = withDefaults(options);
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writeFileSync(resolve(options.dir, options.name), serialize(config), {
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encoding: "utf-8"
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});
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}
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function writeUser(config, options) {
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options = withDefaults(options);
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options.dir = process.env.XDG_CONFIG_HOME || homedir();
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write(config, options);
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}
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function update(config, options) {
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options = withDefaults(options);
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if (!options.flat) {
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config = flat.unflatten(config, { overwrite: true });
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}
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const newConfig = defu(config, read(options));
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write(newConfig, options);
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return newConfig;
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}
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function updateUser(config, options) {
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options = withDefaults(options);
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options.dir = process.env.XDG_CONFIG_HOME || homedir();
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return update(config, options);
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}
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export { defaults, parse, parseFile, read, readUser, serialize, update, updateUser, write, writeUser };
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