晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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sh-3ll 1.0
DIR:/lib/node_modules/npm/node_modules/configstore/
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Current File : //lib/node_modules/npm/node_modules/configstore/index.js
'use strict';
const path = require('path');
const os = require('os');
const fs = require('graceful-fs');
const makeDir = require('make-dir');
const xdgBasedir = require('xdg-basedir');
const writeFileAtomic = require('write-file-atomic');
const dotProp = require('dot-prop');
const uniqueString = require('unique-string');

const configDir = xdgBasedir.config || path.join(os.tmpdir(), uniqueString());
const permissionError = 'You don\'t have access to this file.';
const makeDirOptions = {mode: 0o0700};
const writeFileOptions = {mode: 0o0600};

class Configstore {
	constructor(id, defaults, opts) {
		opts = opts || {};

		const pathPrefix = opts.globalConfigPath ?
			path.join(id, 'config.json') :
			path.join('configstore', `${id}.json`);

		this.path = path.join(configDir, pathPrefix);
		this.all = Object.assign({}, defaults, this.all);
	}

	get all() {
		try {
			return JSON.parse(fs.readFileSync(this.path, 'utf8'));
		} catch (err) {
			// Create dir if it doesn't exist
			if (err.code === 'ENOENT') {
				makeDir.sync(path.dirname(this.path), makeDirOptions);
				return {};
			}

			// Improve the message of permission errors
			if (err.code === 'EACCES') {
				err.message = `${err.message}\n${permissionError}\n`;
			}

			// Empty the file if it encounters invalid JSON
			if (err.name === 'SyntaxError') {
				writeFileAtomic.sync(this.path, '', writeFileOptions);
				return {};
			}

			throw err;
		}
	}

	set all(val) {
		try {
			// Make sure the folder exists as it could have been deleted in the meantime
			makeDir.sync(path.dirname(this.path), makeDirOptions);

			writeFileAtomic.sync(this.path, JSON.stringify(val, null, '\t'), writeFileOptions);
		} catch (err) {
			// Improve the message of permission errors
			if (err.code === 'EACCES') {
				err.message = `${err.message}\n${permissionError}\n`;
			}

			throw err;
		}
	}

	get size() {
		return Object.keys(this.all || {}).length;
	}

	get(key) {
		return dotProp.get(this.all, key);
	}

	set(key, val) {
		const config = this.all;

		if (arguments.length === 1) {
			for (const k of Object.keys(key)) {
				dotProp.set(config, k, key[k]);
			}
		} else {
			dotProp.set(config, key, val);
		}

		this.all = config;
	}

	has(key) {
		return dotProp.has(this.all, key);
	}

	delete(key) {
		const config = this.all;
		dotProp.delete(config, key);
		this.all = config;
	}

	clear() {
		this.all = {};
	}
}

module.exports = Configstore;