1023 lines
20 KiB
TypeScript
1023 lines
20 KiB
TypeScript
/*!
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* config.js - configuration parsing for bcoin
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* Copyright (c) 2016-2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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"use strict";
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import assert from "bsert";
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import Path from "path";
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import os from "os";
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import fs from "fs";
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const HOME = os.homedir ? os.homedir() : "/";
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export interface Options {
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suffix?: string;
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fallback?: string;
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alias?: object;
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}
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export interface LoadOptions {
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hash?: string;
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query?: string;
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env?: object;
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argv?: string[];
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config?: string;
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}
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/**
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* Config Parser
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*/
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class Config {
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private module: string;
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private prefix: string;
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private suffix?: string;
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private fallback?: string;
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private options: Options;
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private alias = {};
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private data = {};
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private env = {};
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private args = {};
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private argv: any[] = [];
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private pass: any[] = [];
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private query = {};
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private hash = {};
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constructor(module: string, options?: Options) {
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assert(typeof module === "string");
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assert(module.length > 0);
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this.module = module;
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this.prefix = Path.join(HOME, `.${module}`);
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if (options) {
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this.init(options);
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}
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}
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private init(options: Options) {
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assert(options && typeof options === "object");
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if (options.suffix != null) {
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assert(typeof options.suffix === "string");
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this.suffix = options.suffix;
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}
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if (options.fallback != null) {
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assert(typeof options.fallback === "string");
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this.fallback = options.fallback;
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}
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if (options.alias) {
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assert(typeof options.alias === "object");
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for (const key of Object.keys(options.alias)) {
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const value = options.alias[key];
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assert(typeof value === "string");
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this.alias[key] = value;
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}
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}
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}
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public inject(options: object) {
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for (const key of Object.keys(options)) {
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const value = options[key];
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switch (key) {
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case "hash":
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case "query":
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case "env":
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case "argv":
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case "config":
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continue;
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}
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this.set(key, value);
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}
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}
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public load(options: LoadOptions) {
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if (options.hash) {
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this.parseHash(options.hash);
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}
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if (options.query) {
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this.parseQuery(options.query);
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}
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if (options.env) {
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this.parseEnv(options.env);
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}
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if (options.argv) {
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this.parseArg(options.argv);
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}
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this.prefix = this.getPrefix();
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}
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public open(file: string) {
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const path = this.getFile(file);
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let text;
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try {
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text = fs.readFileSync(path, "utf8");
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} catch (e) {
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if (e.code === "ENOENT") return;
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throw e;
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}
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this.parseConfig(text);
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this.prefix = this.getPrefix();
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}
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public filter(name: string) {
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assert(typeof name === "string");
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const child = new Config(this.module);
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child.prefix = this.prefix;
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child.suffix = this.suffix;
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child.fallback = this.fallback;
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child.argv = this.argv;
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child.pass = this.pass;
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_filter(name, this.env, child.env);
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_filter(name, this.args, child.args);
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_filter(name, this.query, child.query);
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_filter(name, this.hash, child.hash);
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_filter(name, this.options, child.options);
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return child;
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}
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public set(key: string, value: any) {
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assert(typeof key === "string", "Key must be a string.");
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if (value == null) {
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return;
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}
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key = key.replace(/-/g, "");
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key = key.toLowerCase();
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this.options[key] = value;
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}
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public has(key: string) {
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if (typeof key === "number") {
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assert(key >= 0, "Index must be positive.");
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return key < this.argv.length;
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}
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assert(typeof key === "string", "Key must be a string.");
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key = key.replace(/-/g, "");
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key = key.toLowerCase();
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if (this.hash[key] !== null) {
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return true;
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}
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if (this.query[key] !== null) {
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return true;
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}
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if (this.args[key] !== null) {
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return true;
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}
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if (this.env[key] !== null) {
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return true;
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}
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if (this.data[key] !== null) {
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return true;
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}
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return this.options[key] !== null;
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}
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public get(key: string, fallback = null) {
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if (Array.isArray(key)) {
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const keys = key;
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for (const key of keys) {
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const value = this.get(key);
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if (value !== null) {
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return value;
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}
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}
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return fallback;
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}
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if (typeof key === "number") {
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assert(key >= 0, "Index must be positive.");
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if (key >= this.argv.length) {
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return fallback;
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}
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if (this.argv[key] != null) {
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return this.argv[key];
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}
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return fallback;
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}
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assert(typeof key === "string", "Key must be a string.");
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key = key.replace(/-/g, "");
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key = key.toLowerCase();
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if (this.hash[key] !== null) {
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return this.hash[key];
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}
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if (this.query[key] !== null) {
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return this.query[key];
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}
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if (this.args[key] !== null) {
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return this.args[key];
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}
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if (this.env[key] !== null) {
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return this.env[key];
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}
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if (this.data[key] !== null) {
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return this.data[key];
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}
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if (this.options[key] !== null) {
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return this.options[key];
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}
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return fallback;
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}
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public typeOf(key: string) {
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const value = this.get(key);
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if (value === null) {
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return "null";
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}
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return typeof value;
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}
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public str(key: string, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "string") {
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throw new Error(`${fmt(key)} must be a string.`);
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}
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return value;
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}
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int(key, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "string") {
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if (typeof value !== "number") {
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throw new Error(`${fmt(key)} must be an int.`);
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}
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if (!Number.isSafeInteger(value)) {
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throw new Error(`${fmt(key)} must be an int.`);
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}
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return value;
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}
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if (!/^\-?\d+$/.test(value)) {
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throw new Error(`${fmt(key)} must be an int.`);
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}
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const num = parseInt(value, 10);
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if (!Number.isSafeInteger(num)) {
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throw new Error(`${fmt(key)} must be an int.`);
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}
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return num;
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}
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uint(key, fallback = null) {
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const value = this.int(key);
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if (value === null) {
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return fallback;
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}
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if (value < 0) {
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throw new Error(`${fmt(key)} must be a uint.`);
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}
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return value;
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}
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float(key, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "string") {
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if (typeof value !== "number") {
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throw new Error(`${fmt(key)} must be a float.`);
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}
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if (!isFinite(value)) {
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throw new Error(`${fmt(key)} must be a float.`);
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}
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return value;
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}
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if (!/^\-?\d*(?:\.\d*)?$/.test(value)) {
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throw new Error(`${fmt(key)} must be a float.`);
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}
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if (!/\d/.test(value)) {
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throw new Error(`${fmt(key)} must be a float.`);
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}
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const num = parseFloat(value);
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if (!isFinite(num)) {
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throw new Error(`${fmt(key)} must be a float.`);
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}
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return num;
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}
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ufloat(key, fallback = null) {
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const value = this.float(key);
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if (value === null) {
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return fallback;
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}
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if (value < 0) {
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throw new Error(`${fmt(key)} must be a positive float.`);
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}
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return value;
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}
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fixed(key, exp, fallback = null) {
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const value = this.float(key);
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if (value === null) {
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return fallback;
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}
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try {
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return fromFloat(value, exp || 0);
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} catch (e) {
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throw new Error(`${fmt(key)} must be a fixed number.`);
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}
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}
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ufixed(key, exp, fallback = null) {
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const value = this.fixed(key, exp);
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if (value === null) {
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return fallback;
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}
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if (value < 0) {
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throw new Error(`${fmt(key)} must be a positive fixed number.`);
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}
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return value;
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}
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bool(key, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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// Bitcoin Core compat.
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if (typeof value === "number") {
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if (value === 1) {
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return true;
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}
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if (value === 0) {
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return false;
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}
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}
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if (typeof value !== "string") {
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if (typeof value !== "boolean") {
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throw new Error(`${fmt(key)} must be a boolean.`);
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}
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return value;
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}
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if (value === "true" || value === "1") {
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return true;
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}
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if (value === "false" || value === "0") {
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return false;
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}
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throw new Error(`${fmt(key)} must be a boolean.`);
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}
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buf(key: string, fallback = null, enc: BufferEncoding = "hex") {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "string") {
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if (!Buffer.isBuffer(value)) {
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throw new Error(`${fmt(key)} must be a buffer.`);
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}
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return value;
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}
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const data = Buffer.from(value, enc);
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if (data.length !== Buffer.byteLength(value, enc)) {
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throw new Error(`${fmt(key)} must be a ${enc} string.`);
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}
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return data;
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}
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public array(key: string, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "string") {
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if (!Array.isArray(value)) {
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throw new Error(`${fmt(key)} must be an array.`);
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}
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return value;
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}
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const parts = value.trim().split(/\s*,\s*/);
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const result = [];
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``;
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for (const part of parts) {
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if (part.length === 0) {
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continue;
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}
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result.push(part);
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}
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return result;
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}
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public obj(key: string, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "object" || Array.isArray(value)) {
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throw new Error(`${fmt(key)} must be an object.`);
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}
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return value;
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}
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public func(key: string, fallback = null) {
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const value = this.get(key);
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if (value === null) {
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return fallback;
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}
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if (typeof value !== "function") {
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throw new Error(`${fmt(key)} must be a function.`);
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}
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return value;
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}
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public path(key: string, fallback = null) {
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let value = this.str(key);
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if (value === null) {
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return fallback;
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}
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if (value.length === 0) {
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return fallback;
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}
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switch (value[0]) {
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case "~": // home dir
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value = Path.join(HOME, value.substring(1));
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break;
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case "@": // prefix
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value = Path.join(this.prefix, value.substring(1));
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break;
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default: // cwd
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break;
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}
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|
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return Path.normalize(value);
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}
|
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|
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public mb(key: string, fallback = null) {
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const value = this.uint(key);
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|
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if (value === null) {
|
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return fallback;
|
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}
|
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|
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return value * 1024 * 1024;
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}
|
|
|
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public getSuffix() {
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if (!this.suffix) {
|
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throw new Error("No suffix presented.");
|
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}
|
|
|
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const suffix = this.str(this.suffix, this.fallback);
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|
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assert(isAlpha(suffix), "Bad suffix.");
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|
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return suffix;
|
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}
|
|
|
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public getPrefix() {
|
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let prefix = this.str("prefix");
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|
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if (prefix) {
|
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if (prefix[0] === "~") {
|
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prefix = Path.join(HOME, prefix.substring(1));
|
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}
|
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} else {
|
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prefix = Path.join(HOME, `.${this.module}`);
|
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}
|
|
|
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if (this.suffix) {
|
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const suffix = this.str(this.suffix);
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|
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if (suffix) {
|
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assert(isAlpha(suffix), "Bad suffix.");
|
|
if (this.fallback && suffix !== this.fallback) {
|
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prefix = Path.join(prefix, suffix);
|
|
}
|
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}
|
|
}
|
|
|
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return Path.normalize(prefix);
|
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}
|
|
|
|
public getFile(file: string) {
|
|
const name = this.str("config");
|
|
|
|
if (name) {
|
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return name;
|
|
}
|
|
|
|
return Path.join(this.prefix, file);
|
|
}
|
|
|
|
public location(file: string) {
|
|
return Path.join(this.prefix, file);
|
|
}
|
|
|
|
public parseConfig(text: string) {
|
|
assert(typeof text === "string", "Config must be text.");
|
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|
|
if (text.charCodeAt(0) === 0xfeff) {
|
|
text = text.substring(1);
|
|
}
|
|
|
|
text = text.replace(/\r\n/g, "\n");
|
|
text = text.replace(/\r/g, "\n");
|
|
text = text.replace(/\\\n/g, "");
|
|
|
|
let num = 0;
|
|
|
|
for (const chunk of text.split("\n")) {
|
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const line = chunk.trim();
|
|
|
|
num += 1;
|
|
|
|
if (line.length === 0) {
|
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continue;
|
|
}
|
|
|
|
if (line[0] === "#") {
|
|
continue;
|
|
}
|
|
|
|
const index = line.indexOf(":");
|
|
|
|
if (index === -1) {
|
|
throw new Error(`Expected ':' on line ${num}: "${line}".`);
|
|
}
|
|
|
|
let key = line.substring(0, index).trim();
|
|
|
|
key = key.replace(/\-/g, "");
|
|
|
|
if (!isLowerKey(key)) {
|
|
throw new Error(`Invalid option on line ${num}: ${key}.`);
|
|
}
|
|
|
|
const value = line.substring(index + 1).trim();
|
|
|
|
if (value.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
const alias = this.alias[key];
|
|
|
|
if (alias) {
|
|
key = alias;
|
|
}
|
|
|
|
this.data[key] = value;
|
|
}
|
|
}
|
|
|
|
public parseArg(argv?: string[]) {
|
|
if (!argv || typeof argv !== "object") argv = process.argv;
|
|
|
|
assert(Array.isArray(argv));
|
|
|
|
let last = null;
|
|
let pass = false;
|
|
|
|
for (let i = 2; i < argv.length; i++) {
|
|
const arg = argv[i];
|
|
|
|
assert(typeof arg === "string");
|
|
|
|
if (arg === "--") {
|
|
pass = true;
|
|
continue;
|
|
}
|
|
|
|
if (pass) {
|
|
this.pass.push(arg);
|
|
continue;
|
|
}
|
|
|
|
if (arg.length === 0) {
|
|
last = null;
|
|
continue;
|
|
}
|
|
|
|
if (arg.indexOf("--") === 0) {
|
|
const index = arg.indexOf("=");
|
|
|
|
let key = null;
|
|
let value = null;
|
|
let empty = false;
|
|
|
|
if (index !== -1) {
|
|
// e.g. --opt=val
|
|
key = arg.substring(2, index);
|
|
value = arg.substring(index + 1);
|
|
last = null;
|
|
empty = false;
|
|
} else {
|
|
// e.g. --opt
|
|
key = arg.substring(2);
|
|
value = "true";
|
|
last = null;
|
|
empty = true;
|
|
}
|
|
|
|
key = key.replace(/\-/g, "");
|
|
|
|
if (!isLowerKey(key)) {
|
|
throw new Error(`Invalid argument: --${key}.`);
|
|
}
|
|
|
|
if (value.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
// Do not allow one-letter aliases.
|
|
if (key.length > 1) {
|
|
const alias = this.alias[key];
|
|
if (alias) {
|
|
key = alias;
|
|
}
|
|
}
|
|
|
|
this.args[key] = value;
|
|
|
|
if (empty) {
|
|
last = key;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (arg[0] === "-") {
|
|
// e.g. -abc
|
|
last = null;
|
|
|
|
for (let j = 1; j < arg.length; j++) {
|
|
let key = arg[j];
|
|
|
|
if (
|
|
(key < "a" || key > "z") &&
|
|
(key < "A" || key > "Z") &&
|
|
(key < "0" || key > "9") &&
|
|
key !== "?"
|
|
) {
|
|
throw new Error(`Invalid argument: -${key}.`);
|
|
}
|
|
|
|
const alias = this.alias[key];
|
|
|
|
if (alias) {
|
|
key = alias;
|
|
}
|
|
|
|
this.args[key] = "true";
|
|
|
|
last = key;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
// e.g. foo
|
|
const value = arg;
|
|
|
|
if (value.length === 0) {
|
|
last = null;
|
|
continue;
|
|
}
|
|
|
|
if (last) {
|
|
this.args[last] = value;
|
|
last = null;
|
|
} else {
|
|
this.argv.push(value);
|
|
}
|
|
}
|
|
}
|
|
|
|
public parseEnv(env?: object) {
|
|
let prefix = this.module;
|
|
|
|
prefix = prefix.toUpperCase();
|
|
prefix = prefix.replace(/-/g, "_");
|
|
prefix += "_";
|
|
|
|
if (!env || typeof env !== "object") {
|
|
env = process.env;
|
|
}
|
|
|
|
assert(env && typeof env === "object");
|
|
|
|
for (let key of Object.keys(env)) {
|
|
const value = env[key];
|
|
|
|
assert(typeof value === "string");
|
|
|
|
if (key.indexOf(prefix) !== 0) continue;
|
|
|
|
key = key.substring(prefix.length);
|
|
key = key.replace(/_/g, "");
|
|
|
|
if (!isUpperKey(key)) {
|
|
continue;
|
|
}
|
|
|
|
if (value.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
key = key.toLowerCase();
|
|
|
|
// Do not allow one-letter aliases.
|
|
if (key.length > 1) {
|
|
const alias = this.alias[key];
|
|
if (alias) {
|
|
key = alias;
|
|
}
|
|
}
|
|
|
|
this.env[key] = value;
|
|
}
|
|
}
|
|
|
|
public parseQuery(query: string) {
|
|
if (typeof query !== "string") {
|
|
if (!global.location) {
|
|
return {};
|
|
}
|
|
|
|
query = global.location.search;
|
|
|
|
if (typeof query !== "string") {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
return this.parseForm(query, "?", this.query);
|
|
}
|
|
public parseHash(hash: string) {
|
|
if (typeof hash !== "string") {
|
|
if (!global.location) {
|
|
return {};
|
|
}
|
|
|
|
hash = global.location.hash;
|
|
|
|
if (typeof hash !== "string") {
|
|
return {};
|
|
}
|
|
}
|
|
|
|
return this.parseForm(hash, "#", this.hash);
|
|
}
|
|
|
|
public parseForm(query: string, ch: string, map: object) {
|
|
assert(typeof query === "string");
|
|
|
|
if (query.length === 0) {
|
|
return;
|
|
}
|
|
|
|
if (query[0] === ch) {
|
|
query = query.substring(1);
|
|
}
|
|
|
|
for (const pair of query.split("&")) {
|
|
const index = pair.indexOf("=");
|
|
|
|
let key, value;
|
|
if (index !== -1) {
|
|
key = pair.substring(0, index);
|
|
value = pair.substring(index + 1);
|
|
} else {
|
|
key = pair;
|
|
value = "true";
|
|
}
|
|
|
|
key = unescape(key);
|
|
key = key.replace(/\-/g, "");
|
|
|
|
if (!isLowerKey(key)) {
|
|
continue;
|
|
}
|
|
|
|
value = unescape(value);
|
|
|
|
if (value.length === 0) {
|
|
continue;
|
|
}
|
|
|
|
const alias = this.alias[key];
|
|
|
|
if (alias) {
|
|
key = alias;
|
|
}
|
|
|
|
map[key] = value;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helpers
|
|
*/
|
|
|
|
function fmt(key: string[] | string | number) {
|
|
if (Array.isArray(key)) {
|
|
key = key[0];
|
|
}
|
|
|
|
if (typeof key === "number") {
|
|
return `Argument #${key}`;
|
|
}
|
|
|
|
return key;
|
|
}
|
|
|
|
function unescape(str: string) {
|
|
try {
|
|
str = decodeURIComponent(str);
|
|
str = str.replace(/\+/g, " ");
|
|
} catch (e) {}
|
|
str = str.replace(/\0/g, "");
|
|
return str;
|
|
}
|
|
|
|
function isAlpha(str: string) {
|
|
return /^[a-z0-9_\-]+$/i.test(str);
|
|
}
|
|
|
|
function isKey(key: string) {
|
|
return /^[a-zA-Z0-9]+$/.test(key);
|
|
}
|
|
|
|
function isLowerKey(key: string) {
|
|
if (!isKey(key)) {
|
|
return false;
|
|
}
|
|
|
|
return !/[A-Z]/.test(key);
|
|
}
|
|
|
|
function isUpperKey(key: string) {
|
|
if (!isKey(key)) {
|
|
return false;
|
|
}
|
|
|
|
return !/[a-z]/.test(key);
|
|
}
|
|
|
|
function _filter(name: string, a: object | any[], b: object | any[]) {
|
|
for (const key of Object.keys(a)) {
|
|
if (key.length > name.length && key.indexOf(name) === 0) {
|
|
const sub = key.substring(name.length);
|
|
b[sub] = a[key];
|
|
}
|
|
}
|
|
}
|
|
|
|
function fromFloat(num: number, exp: number) {
|
|
assert(typeof num === "number" && isFinite(num));
|
|
assert(Number.isSafeInteger(exp));
|
|
|
|
let str = num.toFixed(exp);
|
|
let sign = 1;
|
|
|
|
if (str.length > 0 && str[0] === "-") {
|
|
str = str.substring(1);
|
|
sign = -1;
|
|
}
|
|
|
|
let hi: number | string = str;
|
|
let lo: number | string = "0";
|
|
|
|
const index = str.indexOf(".");
|
|
|
|
if (index !== -1) {
|
|
hi = str.substring(0, index);
|
|
lo = str.substring(index + 1);
|
|
}
|
|
|
|
hi = hi.replace(/^0+/, "");
|
|
lo = lo.replace(/0+$/, "");
|
|
|
|
assert(hi.length <= 16 - exp, "Fixed number string exceeds 2^53-1.");
|
|
|
|
assert(lo.length <= exp, "Too many decimal places in fixed number string.");
|
|
|
|
if (hi.length === 0) {
|
|
hi = "0";
|
|
}
|
|
|
|
while (lo.length < exp) {
|
|
lo += "0";
|
|
}
|
|
|
|
if (lo.length === 0) {
|
|
lo = "0";
|
|
}
|
|
|
|
assert(
|
|
/^\d+$/.test(hi) && /^\d+$/.test(lo),
|
|
"Non-numeric characters in fixed number string."
|
|
);
|
|
|
|
hi = parseInt(hi, 10);
|
|
lo = parseInt(lo, 10);
|
|
|
|
const mult = Math.pow(10, exp);
|
|
const maxLo = Number.MAX_SAFE_INTEGER % mult;
|
|
const maxHi = (Number.MAX_SAFE_INTEGER - maxLo) / mult;
|
|
|
|
assert(
|
|
hi < maxHi || (hi === maxHi && lo <= maxLo),
|
|
"Fixed number string exceeds 2^53-1."
|
|
);
|
|
|
|
return sign * (hi * mult + lo);
|
|
}
|