From 9800197fe85248bdf47b849007441d3e09b317cd Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 01:33:44 +0400 Subject: [PATCH 01/25] feat: basic structure and up command --- .eslintrc.json | 11 + .gitignore | 1 + commands/up.js | 15 + errors.js | 11 + file-manager.js | 30 + package-lock.json | 1585 +++++++++++++++++++++++++++++++++++++++++++++ package.json | 16 + repl.js | 160 +++++ 8 files changed, 1829 insertions(+) create mode 100644 .eslintrc.json create mode 100644 .gitignore create mode 100644 commands/up.js create mode 100644 errors.js create mode 100644 file-manager.js create mode 100644 package-lock.json create mode 100644 package.json create mode 100644 repl.js diff --git a/.eslintrc.json b/.eslintrc.json new file mode 100644 index 0000000..73a23d6 --- /dev/null +++ b/.eslintrc.json @@ -0,0 +1,11 @@ +{ + "env": { + "es2021": true, + "node": true + }, + "extends": "eslint:recommended", + "parserOptions": { + "ecmaVersion": "latest", + "sourceType": "module" + } +} diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c2658d7 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules/ diff --git a/commands/up.js b/commands/up.js new file mode 100644 index 0000000..13830c8 --- /dev/null +++ b/commands/up.js @@ -0,0 +1,15 @@ +import { join } from 'path'; +import { InvalidInputError } from '../errors.js'; + +const up = { + async exec(args) { + if (args.length > 0) { + throw new InvalidInputError('up: Unexpected arguments'); + } + const currentDir = process.cwd(); + const nextDir = join(currentDir, '..'); + process.chdir(nextDir); + }, +}; + +export { up }; diff --git a/errors.js b/errors.js new file mode 100644 index 0000000..e1e6c3a --- /dev/null +++ b/errors.js @@ -0,0 +1,11 @@ +export class InvalidInputError extends Error { + get name() { + return this.constructor.name; + } +} + +export class CommandFailureError extends Error { + get name() { + return this.constructor.name; + } +} diff --git a/file-manager.js b/file-manager.js new file mode 100644 index 0000000..3c8df5a --- /dev/null +++ b/file-manager.js @@ -0,0 +1,30 @@ +import { userInfo } from 'os'; +import { Repl } from './repl.js'; +import { up } from './commands/up.js'; + +const commands = { + up, +}; + +class FileManager { + constructor() { + this._repl = new Repl(process.stdin, process.stdout, { + prompt: () => `\nYou are currently in ${process.cwd()}\nšŸ¤ > `, + }); + + Object.entries(commands).forEach(([name, command]) => { + this._repl.registerCommand(name, command); + }); + } + + start({ username = userInfo().username } = {}) { + this._repl.writeLine(`Hello, ${username}!`); + this._repl.start(); + this._repl.on('exit', () => { + this._repl.writeLine('\n\nGoodbye!'); + }); + } +} + +const fm = new FileManager(); +fm.start(); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..966f8b6 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1585 @@ +{ + "name": "file-manager", + 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"version": "0.0.1", + "description": "", + "main": "index.js", + "type": "module", + "scripts": { + "start": "node ./cli.js" + }, + "keywords": [], + "author": "", + "license": "ISC", + "devDependencies": { + "eslint": "~8.17.0" + } +} diff --git a/repl.js b/repl.js new file mode 100644 index 0000000..d48d0cc --- /dev/null +++ b/repl.js @@ -0,0 +1,160 @@ +import { createInterface } from 'readline'; +import { EventEmitter } from 'events'; +import { promisify } from 'util'; + +import { InvalidInputError } from './errors.js'; + +const getValue = (x) => (typeof x === 'function' ? x() : x); + +const inputWordRe = /^(?:([^'"\s]+)|'([^']*)'|"([^"]*)")/; + +/** + * @param {string} input + * @returns {{ name: string, args: string[] }} + */ +function parseCommand(input) { + let name = ''; + const args = []; + + input = input.trim(); + + while (input.length) { + const match = input.match(inputWordRe); + if (!match) { + throw new InvalidInputError('Invalid input'); + } + const [substring, ...rest] = match; + const word = rest.find((x) => x !== undefined); + + if (!name) { + if (!word) { + throw new InvalidInputError('Command is required'); + } + name = word; + } else { + args.push(word); + } + + input = input.slice(substring.length).trim(); + } + + return { name, args }; +} + +export class Repl extends EventEmitter { + /** + * @param {NodeJS.ReadableStream} [input] + * @param {NodeJS.WritableStream} [output] + * @param {object} [options] + * @param { prompt: string | () => string} [options.prompt] + */ + constructor( + input = process.stdin, + output = process.stdout, + { prompt = 'šŸ¤ > ' } = {} + ) { + super(); + this._input = input; + this._output = output; + this._prompt = prompt; + + this._closed = false; + this._commands = new Map(); + + this._rli = createInterface(input, output); + this._question = promisify(this._rli.question).bind(this._rli); + this._rli.on('close', () => this._handleClose()); + } + + /** + * + * @param {string} name + * @param {{ exec: (args: string[], context: any) => any }} command + */ + registerCommand(name, command) { + console.log(name, command); + if (!name) { + throw new Error('Command name is required'); + } + if (!command) { + throw new Error('Command is required'); + } + if (typeof command.exec !== 'function') { + throw new Error(`Command "${name}" does not have exec method`); + } + if (this._commands.has(name)) { + throw new Error(`Duplicate command: "${name}"`); + } + this._commands.set(name, command); + } + + /** + * @param {object} [options] + * @param {AbortSignal} [options.signal] + * @returns + */ + async prompt() { + if (this._closed) { + throw new Error('prompt after close'); + } + const promptString = getValue(this._prompt); + const input = await this._question(promptString); + return parseCommand(input); + } + + /** + * @param {string | Buffer} content + */ + writeLine(content) { + this._output.write(content); + this._output.write('\n'); + } + + start() { + // Repl event loop + (async () => { + // eslint-disable-next-line no-constant-condition + while (true) { + try { + const ac = new AbortController(); + const { signal } = ac; + const { name, args } = await this.prompt(); + const command = this._findCommand(name); + await command.exec(args, { + ...this._getCommandContext(), + signal, + }); + } catch (e) { + if (e.name === 'InvalidInputError') { + this.writeLine('Invalid input'); + } else { + throw e; + } + } + } + })(); + } + + /** @private */ + _handleClose() { + this._closed = true; + this.emit('exit'); + } + + /** @private */ + _findCommand(name) { + const command = this._commands.get(name); + if (!command) { + throw new InvalidInputError(`Unknown command: ${command}`); + } + return command; + } + + /** @private */ + _getCommandContext() { + if (!this._cachedCommandContext) { + this._cachedCommandContext = {}; + } + return this._cachedCommandContext; + } +} From e4f62b7cb75696cd9bd40d321c1b150ae4d6c0a9 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 04:03:36 +0400 Subject: [PATCH 02/25] feat: cd command --- commands/cd.js | 23 +++++++++++++++++++++++ commands/up.js | 8 ++++++-- errors.js | 14 ++++++++------ file-manager.js | 22 ++++++++++++++++------ repl.js | 22 ++++++++++------------ 5 files changed, 63 insertions(+), 26 deletions(-) create mode 100644 commands/cd.js diff --git a/commands/cd.js b/commands/cd.js new file mode 100644 index 0000000..9621132 --- /dev/null +++ b/commands/cd.js @@ -0,0 +1,23 @@ +import { homedir } from 'os'; +import { resolve } from 'path'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const cd = { + async exec(args) { + if (args.length > 1) { + throw new InvalidInputError('cd: too many arguments'); + } + const [dir = homedir()] = args; + const nextDir = resolve(process.cwd(), dir); + try { + process.chdir(nextDir); + } catch (error) { + throw new CommandFailureError( + 'cd: cannot change current working directory', + { cause: error } + ); + } + }, +}; + +export { cd }; diff --git a/commands/up.js b/commands/up.js index 13830c8..c03b4c3 100644 --- a/commands/up.js +++ b/commands/up.js @@ -1,5 +1,5 @@ import { join } from 'path'; -import { InvalidInputError } from '../errors.js'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; const up = { async exec(args) { @@ -8,7 +8,11 @@ const up = { } const currentDir = process.cwd(); const nextDir = join(currentDir, '..'); - process.chdir(nextDir); + try { + process.chdir(nextDir); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } }, }; diff --git a/errors.js b/errors.js index e1e6c3a..292646e 100644 --- a/errors.js +++ b/errors.js @@ -1,11 +1,13 @@ -export class InvalidInputError extends Error { +class BaseError extends Error { get name() { return this.constructor.name; } -} - -export class CommandFailureError extends Error { - get name() { - return this.constructor.name; + constructor(msg, details = {}) { + super(msg); + // this.name = this.constructor.name; + Object.assign(this, details); } } + +export class InvalidInputError extends BaseError {} +export class CommandFailureError extends BaseError {} diff --git a/file-manager.js b/file-manager.js index 3c8df5a..7bd3f2a 100644 --- a/file-manager.js +++ b/file-manager.js @@ -1,15 +1,22 @@ -import { userInfo } from 'os'; +import { userInfo, homedir } from 'os'; import { Repl } from './repl.js'; import { up } from './commands/up.js'; +import { cd } from './commands/cd.js'; const commands = { up, + cd, }; class FileManager { - constructor() { + constructor({ username }) { + this._username = username; + this._repl = new Repl(process.stdin, process.stdout, { prompt: () => `\nYou are currently in ${process.cwd()}\nšŸ¤ > `, + context: { + getUsername: () => this._username, + }, }); Object.entries(commands).forEach(([name, command]) => { @@ -17,14 +24,17 @@ class FileManager { }); } - start({ username = userInfo().username } = {}) { - this._repl.writeLine(`Hello, ${username}!`); - this._repl.start(); + start() { + process.chdir(homedir()); + + this._repl.writeLine(`Hello, ${this._username}!`); this._repl.on('exit', () => { this._repl.writeLine('\n\nGoodbye!'); }); + + this._repl.start(); } } -const fm = new FileManager(); +const fm = new FileManager({ username: userInfo().username }); fm.start(); diff --git a/repl.js b/repl.js index d48d0cc..c428626 100644 --- a/repl.js +++ b/repl.js @@ -47,16 +47,19 @@ export class Repl extends EventEmitter { * @param {NodeJS.WritableStream} [output] * @param {object} [options] * @param { prompt: string | () => string} [options.prompt] + * @param {object} [options.context] */ constructor( input = process.stdin, output = process.stdout, - { prompt = 'šŸ¤ > ' } = {} + { prompt = 'šŸ¤ > ' } = {}, + context = {} ) { super(); this._input = input; this._output = output; this._prompt = prompt; + this._context = context; this._closed = false; this._commands = new Map(); @@ -72,7 +75,6 @@ export class Repl extends EventEmitter { * @param {{ exec: (args: string[], context: any) => any }} command */ registerCommand(name, command) { - console.log(name, command); if (!name) { throw new Error('Command name is required'); } @@ -121,14 +123,18 @@ export class Repl extends EventEmitter { const { name, args } = await this.prompt(); const command = this._findCommand(name); await command.exec(args, { - ...this._getCommandContext(), + ...this._context, signal, }); } catch (e) { if (e.name === 'InvalidInputError') { this.writeLine('Invalid input'); + } else if (e.name === 'CommandFailureError') { + this.writeLine(`Operation failed (${e.cause.message})`); } else { - throw e; + console.error(e); + this.writeLine('Operation failed'); + // throw e; } } } @@ -149,12 +155,4 @@ export class Repl extends EventEmitter { } return command; } - - /** @private */ - _getCommandContext() { - if (!this._cachedCommandContext) { - this._cachedCommandContext = {}; - } - return this._cachedCommandContext; - } } From bb0bccdfce2ec38f35c011eee350d51b66af912f Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 04:30:33 +0400 Subject: [PATCH 03/25] feat: ls command --- commands/ls.js | 29 +++++++++++++++++++++++++++++ file-manager.js | 4 ++++ repl.js | 3 +-- 3 files changed, 34 insertions(+), 2 deletions(-) create mode 100644 commands/ls.js diff --git a/commands/ls.js b/commands/ls.js new file mode 100644 index 0000000..7985e6a --- /dev/null +++ b/commands/ls.js @@ -0,0 +1,29 @@ +import { readdir } from 'fs/promises'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const ls = { + async exec(args, context) { + if (args.length > 1) { + throw new InvalidInputError('ls: too many arguments'); + } + const [dir = '.'] = args; + let entries; + + try { + entries = await readdir(dir, { withFileTypes: true }); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + + const output = entries + .map((dirent) => { + // TODO: customize output depending on file type + return dirent.name; + }) + .join('\n'); + + context.writeLine(output); + }, +}; + +export { ls }; diff --git a/file-manager.js b/file-manager.js index 7bd3f2a..be5ed1f 100644 --- a/file-manager.js +++ b/file-manager.js @@ -1,11 +1,14 @@ import { userInfo, homedir } from 'os'; import { Repl } from './repl.js'; + import { up } from './commands/up.js'; import { cd } from './commands/cd.js'; +import { ls } from './commands/ls.js'; const commands = { up, cd, + ls, }; class FileManager { @@ -16,6 +19,7 @@ class FileManager { prompt: () => `\nYou are currently in ${process.cwd()}\nšŸ¤ > `, context: { getUsername: () => this._username, + writeLine: (str) => this._repl.writeLine(str), }, }); diff --git a/repl.js b/repl.js index c428626..23f1193 100644 --- a/repl.js +++ b/repl.js @@ -52,8 +52,7 @@ export class Repl extends EventEmitter { constructor( input = process.stdin, output = process.stdout, - { prompt = 'šŸ¤ > ' } = {}, - context = {} + { prompt = 'šŸ¤ > ', context = {} } = {} ) { super(); this._input = input; From 0ee55279b80aec809ac260169e8856350f79291a Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 05:25:19 +0400 Subject: [PATCH 04/25] feat: sleep command (abort demo) --- commands/sleep.js | 26 ++++++++++++++++++++++++++ errors.js | 1 + file-manager.js | 8 +++++++- repl.js | 25 ++++++++++++++++++++----- 4 files changed, 54 insertions(+), 6 deletions(-) create mode 100644 commands/sleep.js diff --git a/commands/sleep.js b/commands/sleep.js new file mode 100644 index 0000000..ba45e2f --- /dev/null +++ b/commands/sleep.js @@ -0,0 +1,26 @@ +import { CommandAbortError, InvalidInputError } from '../errors.js'; + +const sleep = { + async exec(args, { signal }) { + if (args.length === 0) { + throw new InvalidInputError('sleep: missing argument'); + } + + const ms = args.map(Number).map((a, b) => a + b) * 1000; + if (Number.isNaN(ms)) { + throw new InvalidInputError('sleep: invalid arguments'); + } + + if (signal.aborted) return; + + return new Promise((resolve, reject) => { + const to = setTimeout(resolve, ms); + signal.addEventListener('abort', () => { + clearTimeout(to); + reject(new CommandAbortError()); + }); + }); + }, +}; + +export { sleep }; diff --git a/errors.js b/errors.js index 292646e..a49631d 100644 --- a/errors.js +++ b/errors.js @@ -11,3 +11,4 @@ class BaseError extends Error { export class InvalidInputError extends BaseError {} export class CommandFailureError extends BaseError {} +export class CommandAbortError extends BaseError {} diff --git a/file-manager.js b/file-manager.js index be5ed1f..8279527 100644 --- a/file-manager.js +++ b/file-manager.js @@ -4,22 +4,28 @@ import { Repl } from './repl.js'; import { up } from './commands/up.js'; import { cd } from './commands/cd.js'; import { ls } from './commands/ls.js'; +import { sleep } from './commands/sleep.js'; const commands = { up, cd, ls, + sleep, }; class FileManager { constructor({ username }) { this._username = username; - this._repl = new Repl(process.stdin, process.stdout, { + const input = process.stdin; + const output = process.stdout; + + this._repl = new Repl(input, output, { prompt: () => `\nYou are currently in ${process.cwd()}\nšŸ¤ > `, context: { getUsername: () => this._username, writeLine: (str) => this._repl.writeLine(str), + output, }, }); diff --git a/repl.js b/repl.js index 23f1193..ff473cc 100644 --- a/repl.js +++ b/repl.js @@ -112,29 +112,44 @@ export class Repl extends EventEmitter { } start() { + /** @type {AbortController | null} */ + let commandAbortController = null; + + this._rli.on('SIGINT', () => { + if (commandAbortController) { + commandAbortController.abort(); + } else { + this._rli.close(); + } + }); + // Repl event loop (async () => { // eslint-disable-next-line no-constant-condition while (true) { try { - const ac = new AbortController(); - const { signal } = ac; const { name, args } = await this.prompt(); const command = this._findCommand(name); + + commandAbortController = new AbortController(); + const { signal } = commandAbortController; await command.exec(args, { ...this._context, signal, }); } catch (e) { if (e.name === 'InvalidInputError') { - this.writeLine('Invalid input'); + this.writeLine(`Invalid input (${e.message})`); } else if (e.name === 'CommandFailureError') { - this.writeLine(`Operation failed (${e.cause.message})`); + this.writeLine(`Operation failed (${e.message})`); + } else if (e.name === 'CommandAbortError') { + this.writeLine('Operation cancelled'); } else { console.error(e); this.writeLine('Operation failed'); - // throw e; } + } finally { + commandAbortController = null; } } })(); From 2667f4997474b04d1c5293f90359ef8cd5ed7a7a Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 06:59:05 +0400 Subject: [PATCH 05/25] feat: cat command --- commands/cat.js | 55 +++++++++++++++++++++++++++++++++++++++++++++++++ errors.js | 23 +++++++++++++++++++++ file-manager.js | 2 ++ repl.js | 8 +++---- 4 files changed, 84 insertions(+), 4 deletions(-) create mode 100644 commands/cat.js diff --git a/commands/cat.js b/commands/cat.js new file mode 100644 index 0000000..3abc937 --- /dev/null +++ b/commands/cat.js @@ -0,0 +1,55 @@ +import { createReadStream } from 'fs'; +import { realpath, stat } from 'fs/promises'; +import { pipeline } from 'stream/promises'; +import { + CommandFailureError, + InvalidInputError, + rethrowIf, + rethrowIfAbort, +} from '../errors.js'; + +const cat = { + async exec(args, { signal, output }) { + if (args.length === 0) { + throw new InvalidInputError('cat: argument is required'); + } + + const paths = await Promise.all( + args.map(async (path) => { + try { + const fileStat = await stat(path); + if (fileStat.isDirectory() || fileStat.isSocket()) { + throw new CommandFailureError(`cat: ${path} is invalid target`); + } + + return await realpath(path); + } catch (error) { + rethrowIf(error, CommandFailureError); + if (error.code === 'EACCES') { + throw new CommandFailureError( + `cat: ${path}: permission denied` + ); + } + if (error.code === 'ENOENT') { + throw new CommandFailureError(`cat: ${path}: no such file`); + } + throw new CommandFailureError(error.message, { cause: error }); + } + }) + ); + + while (paths.length) { + const path = paths.shift(); + let input; + try { + input = createReadStream(path); + await pipeline(input, output, { signal, end: false }); + } catch (error) { + rethrowIfAbort(error); + throw new CommandFailureError(error.message, { cause: error }); + } + } + }, +}; + +export { cat }; diff --git a/errors.js b/errors.js index a49631d..a4883f0 100644 --- a/errors.js +++ b/errors.js @@ -12,3 +12,26 @@ class BaseError extends Error { export class InvalidInputError extends BaseError {} export class CommandFailureError extends BaseError {} export class CommandAbortError extends BaseError {} + +/** + * @param {Error} error + * @returns {boolean} + */ +export function isAbortError(error) { + return ( + (error.code === 'ABORT_ERR' && error.name === 'AbortError') || + error instanceof CommandAbortError + ); +} + +export function rethrowIf(error, type) { + if (error instanceof type) { + throw error; + } +} + +export function rethrowIfAbort(error) { + if (isAbortError(error)) { + throw error; + } +} diff --git a/file-manager.js b/file-manager.js index 8279527..dac3474 100644 --- a/file-manager.js +++ b/file-manager.js @@ -5,12 +5,14 @@ import { up } from './commands/up.js'; import { cd } from './commands/cd.js'; import { ls } from './commands/ls.js'; import { sleep } from './commands/sleep.js'; +import { cat } from './commands/cat.js'; const commands = { up, cd, ls, sleep, + cat, }; class FileManager { diff --git a/repl.js b/repl.js index ff473cc..4b58796 100644 --- a/repl.js +++ b/repl.js @@ -2,7 +2,7 @@ import { createInterface } from 'readline'; import { EventEmitter } from 'events'; import { promisify } from 'util'; -import { InvalidInputError } from './errors.js'; +import { CommandFailureError, InvalidInputError, isAbortError } from './errors.js'; const getValue = (x) => (typeof x === 'function' ? x() : x); @@ -138,11 +138,11 @@ export class Repl extends EventEmitter { signal, }); } catch (e) { - if (e.name === 'InvalidInputError') { + if (e instanceof InvalidInputError) { this.writeLine(`Invalid input (${e.message})`); - } else if (e.name === 'CommandFailureError') { + } else if (e instanceof CommandFailureError) { this.writeLine(`Operation failed (${e.message})`); - } else if (e.name === 'CommandAbortError') { + } else if (isAbortError(e)) { this.writeLine('Operation cancelled'); } else { console.error(e); From 1cf4f96698b23894991efb9bcd3c7c4edd27ef9e Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 07:42:46 +0400 Subject: [PATCH 06/25] feat: add comand --- commands/add.js | 19 +++++++++++++++++++ file-manager.js | 8 +++++--- repl.js | 2 +- 3 files changed, 25 insertions(+), 4 deletions(-) create mode 100644 commands/add.js diff --git a/commands/add.js b/commands/add.js new file mode 100644 index 0000000..d3d9b5b --- /dev/null +++ b/commands/add.js @@ -0,0 +1,19 @@ +import { writeFile } from 'fs/promises'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const add = { + async exec(args, { signal }) { + if (args.length < 1) { + throw new InvalidInputError('add: missing argument'); + } + + const [name] = args; + try { + await writeFile(name, '', { flag: 'wx', signal }); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { add }; diff --git a/file-manager.js b/file-manager.js index dac3474..df5ceb6 100644 --- a/file-manager.js +++ b/file-manager.js @@ -6,6 +6,7 @@ import { cd } from './commands/cd.js'; import { ls } from './commands/ls.js'; import { sleep } from './commands/sleep.js'; import { cat } from './commands/cat.js'; +import { add } from './commands/add.js'; const commands = { up, @@ -13,6 +14,7 @@ const commands = { ls, sleep, cat, + add, }; class FileManager { @@ -36,8 +38,8 @@ class FileManager { }); } - start() { - process.chdir(homedir()); + start({ cwd = homedir() } = {}) { + process.chdir(cwd); this._repl.writeLine(`Hello, ${this._username}!`); this._repl.on('exit', () => { @@ -49,4 +51,4 @@ class FileManager { } const fm = new FileManager({ username: userInfo().username }); -fm.start(); +fm.start({ cwd: '.' }); diff --git a/repl.js b/repl.js index 4b58796..c2feaa9 100644 --- a/repl.js +++ b/repl.js @@ -165,7 +165,7 @@ export class Repl extends EventEmitter { _findCommand(name) { const command = this._commands.get(name); if (!command) { - throw new InvalidInputError(`Unknown command: ${command}`); + throw new InvalidInputError(`Unknown command: ${name}`); } return command; } From 0f9651758e9280cd49bf4d9b63b1cf9d090fec3a Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 08:27:07 +0400 Subject: [PATCH 07/25] feat: cp/mv/rn/rm commands --- commands/cp.js | 24 ++++++++++++++++++++++++ commands/mv.js | 24 ++++++++++++++++++++++++ commands/rm.js | 19 +++++++++++++++++++ commands/rn.js | 27 +++++++++++++++++++++++++++ file-manager.js | 8 ++++++++ 5 files changed, 102 insertions(+) create mode 100644 commands/cp.js create mode 100644 commands/mv.js create mode 100644 commands/rm.js create mode 100644 commands/rn.js diff --git a/commands/cp.js b/commands/cp.js new file mode 100644 index 0000000..abde97b --- /dev/null +++ b/commands/cp.js @@ -0,0 +1,24 @@ +import { constants } from 'fs'; +import { copyFile } from 'fs/promises'; +import { basename, join, resolve } from 'path'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const cp = { + async exec(args) { + if (args.length !== 2) { + throw new InvalidInputError('cp: exactly 2 arguments are required'); + } + + // TODO: validate from is file + const [from, toFolder] = args; + const to = join(toFolder, basename(resolve(from))); + + try { + await copyFile(from, to, constants.COPYFILE_EXCL); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { cp }; diff --git a/commands/mv.js b/commands/mv.js new file mode 100644 index 0000000..8f07304 --- /dev/null +++ b/commands/mv.js @@ -0,0 +1,24 @@ +import { rename } from 'fs/promises'; +import { basename, join, resolve } from 'path'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const mv = { + async exec(args) { + if (args.length !== 2) { + throw new InvalidInputError('mv: exactly 2 arguments are required'); + } + + const [from, toFolder] = args; + const to = join(toFolder, basename(resolve(from))); + + // TODO: validate `to` does not exist + + try { + await rename(from, to); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { mv }; diff --git a/commands/rm.js b/commands/rm.js new file mode 100644 index 0000000..108d332 --- /dev/null +++ b/commands/rm.js @@ -0,0 +1,19 @@ +import { rm } from 'fs/promises'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const rmCommand = { + async exec(args) { + if (args.length !== 1) { + throw new InvalidInputError('rm: missing argument'); + } + + const [file] = args; + try { + await rm(file); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { rmCommand as rm }; diff --git a/commands/rn.js b/commands/rn.js new file mode 100644 index 0000000..5807183 --- /dev/null +++ b/commands/rn.js @@ -0,0 +1,27 @@ +import { rename } from 'fs/promises'; +import { dirname, join, resolve, sep } from 'path'; +import { CommandFailureError, InvalidInputError } from '../errors.js'; + +const rn = { + async exec(args) { + if (args.length !== 2) { + throw new InvalidInputError('rn: exactly 2 arguments are required'); + } + + const [from, toName] = args; + + if (toName.includes(sep)) { + throw new InvalidInputError(`rn: new name contains ${sep}`); + } + + const to = join(dirname(resolve(from)), toName); + + try { + await rename(from, to); + } catch (error) { + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { rn }; diff --git a/file-manager.js b/file-manager.js index df5ceb6..2cb439c 100644 --- a/file-manager.js +++ b/file-manager.js @@ -7,6 +7,10 @@ import { ls } from './commands/ls.js'; import { sleep } from './commands/sleep.js'; import { cat } from './commands/cat.js'; import { add } from './commands/add.js'; +import { rn } from './commands/rn.js'; +import { cp } from './commands/cp.js'; +import { mv } from './commands/mv.js'; +import { rm } from './commands/rm.js'; const commands = { up, @@ -15,6 +19,10 @@ const commands = { sleep, cat, add, + rn, + cp, + mv, + rm, }; class FileManager { From efe5016dcc24361113db326cad53ca0ab8024e10 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 09:19:42 +0400 Subject: [PATCH 08/25] feat: os command --- commands/os.js | 46 ++++++++++++++++++++++++++++++++++++++++++++++ file-manager.js | 2 ++ 2 files changed, 48 insertions(+) create mode 100644 commands/os.js diff --git a/commands/os.js b/commands/os.js new file mode 100644 index 0000000..1fcec11 --- /dev/null +++ b/commands/os.js @@ -0,0 +1,46 @@ +import * as os from 'os'; +import { InvalidInputError } from '../errors.js'; + +const eol = os.EOL.replace('\n', '\\n').replace('\r', '\\r'); + +const subcommands = { + EOL: () => eol, + cpus: () => { + const list = os.cpus().map(({ model, speed }) => { + // prettier-ignore + return [ + ` - model: ${model}`, + ` speed: ${(speed/1000).toFixed(3)} GHz` + ].join('\n'); + }); + + // prettier-ignore + return [ + `total: ${list.length}`, + 'cores:', + ...list, + ].join('\n'); + }, + homedir: () => os.homedir(), + username: () => os.userInfo().username, + architecture: () => os.arch(), +}; + +const allowedOptions = Object.keys(subcommands).map((k) => '--' + k); + +const osCommand = { + async exec(args, context) { + if (args.length !== 1) { + throw new InvalidInputError('os: exactly 1 argument is required'); + } + const [option] = args; + if (!allowedOptions.includes(option)) { + throw new InvalidInputError(`os: unknown option ${option}`); + } + + const subcommandName = option.slice(2); + context.writeLine(subcommands[subcommandName]()); + }, +}; + +export { osCommand as os }; diff --git a/file-manager.js b/file-manager.js index 2cb439c..665f151 100644 --- a/file-manager.js +++ b/file-manager.js @@ -11,6 +11,7 @@ import { rn } from './commands/rn.js'; import { cp } from './commands/cp.js'; import { mv } from './commands/mv.js'; import { rm } from './commands/rm.js'; +import { os } from './commands/os.js'; const commands = { up, @@ -23,6 +24,7 @@ const commands = { cp, mv, rm, + os, }; class FileManager { From 606a694b3ef6bab2f70482e3b5e87ac28c2a4bda Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 09:46:15 +0400 Subject: [PATCH 09/25] feat: hash command --- commands/hash.js | 26 ++++++++++++++++++++++++++ file-manager.js | 2 ++ 2 files changed, 28 insertions(+) create mode 100644 commands/hash.js diff --git a/commands/hash.js b/commands/hash.js new file mode 100644 index 0000000..dabc2f2 --- /dev/null +++ b/commands/hash.js @@ -0,0 +1,26 @@ +import { createHash } from 'crypto'; +import { createReadStream } from 'fs'; +import { pipeline } from 'stream/promises'; +import { CommandFailureError, InvalidInputError, rethrowIfAbort } from '../errors.js'; + +const hash = { + async exec(args, { signal, writeLine }) { + if (args.length !== 1) { + throw new InvalidInputError('hash: exactly 1 argument is required'); + } + const [filePath] = args; + + const hasher = createHash('sha256'); + try { + const input = createReadStream(filePath); + await pipeline(input, hasher, { signal }); + } catch (error) { + rethrowIfAbort(error); + throw new CommandFailureError(error.message, { cause: error }); + } + + writeLine(hasher.digest('hex')); + }, +}; + +export { hash }; diff --git a/file-manager.js b/file-manager.js index 665f151..f74bbc2 100644 --- a/file-manager.js +++ b/file-manager.js @@ -12,6 +12,7 @@ import { cp } from './commands/cp.js'; import { mv } from './commands/mv.js'; import { rm } from './commands/rm.js'; import { os } from './commands/os.js'; +import { hash } from './commands/hash.js'; const commands = { up, @@ -25,6 +26,7 @@ const commands = { mv, rm, os, + hash, }; class FileManager { From 7ce44c18d1f9fb6d99969cf4e952cb1d8c9f6be3 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Tue, 7 Jun 2022 11:19:30 +0400 Subject: [PATCH 10/25] feat: compress/decompress commands --- commands/compress.js | 24 ++++++++++++++++++++++++ commands/decompress.js | 24 ++++++++++++++++++++++++ file-manager.js | 4 ++++ 3 files changed, 52 insertions(+) create mode 100644 commands/compress.js create mode 100644 commands/decompress.js diff --git a/commands/compress.js b/commands/compress.js new file mode 100644 index 0000000..0562ad0 --- /dev/null +++ b/commands/compress.js @@ -0,0 +1,24 @@ +import { createReadStream, createWriteStream } from 'fs'; +import { pipeline } from 'stream/promises'; +import { createBrotliCompress } from 'zlib'; +import { InvalidInputError, CommandFailureError, rethrowIfAbort } from '../errors.js'; + +const compress = { + async exec(args, { signal }) { + if (args.length !== 2) { + throw new InvalidInputError('compress: exactly 2 arguments are required'); + } + const [from, to] = args; + try { + const input = createReadStream(from); + const output = createWriteStream(to); + const compressor = createBrotliCompress(); + await pipeline(input, compressor, output, { signal }); + } catch (error) { + rethrowIfAbort(error); + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { compress }; diff --git a/commands/decompress.js b/commands/decompress.js new file mode 100644 index 0000000..bca1667 --- /dev/null +++ b/commands/decompress.js @@ -0,0 +1,24 @@ +import { createReadStream, createWriteStream } from 'fs'; +import { pipeline } from 'stream/promises'; +import { createBrotliDecompress } from 'zlib'; +import { InvalidInputError, CommandFailureError, rethrowIfAbort } from '../errors.js'; + +const decompress = { + async exec(args, { signal }) { + if (args.length !== 2) { + throw new InvalidInputError('compress: exactly 2 arguments are required'); + } + const [from, to] = args; + try { + const input = createReadStream(from); + const output = createWriteStream(to); + const compressor = createBrotliDecompress(); + await pipeline(input, compressor, output, { signal }); + } catch (error) { + rethrowIfAbort(error); + throw new CommandFailureError(error.message, { cause: error }); + } + }, +}; + +export { decompress }; diff --git a/file-manager.js b/file-manager.js index f74bbc2..c6a856c 100644 --- a/file-manager.js +++ b/file-manager.js @@ -13,6 +13,8 @@ import { mv } from './commands/mv.js'; import { rm } from './commands/rm.js'; import { os } from './commands/os.js'; import { hash } from './commands/hash.js'; +import { compress } from './commands/compress.js'; +import { decompress } from './commands/decompress.js'; const commands = { up, @@ -27,6 +29,8 @@ const commands = { rm, os, hash, + compress, + decompress, }; class FileManager { From 6516b4a6abf4c9298b3c992203a6eb7f6bdbd9a1 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 00:58:58 +0400 Subject: [PATCH 11/25] refactor: index.js for commands --- commands/index.js | 14 ++++++++++++++ file-manager.js | 33 +-------------------------------- 2 files changed, 15 insertions(+), 32 deletions(-) create mode 100644 commands/index.js diff --git a/commands/index.js b/commands/index.js new file mode 100644 index 0000000..d60cc45 --- /dev/null +++ b/commands/index.js @@ -0,0 +1,14 @@ +export { up } from './up.js'; +export { cd } from './cd.js'; +export { ls } from './ls.js'; +export { sleep } from './sleep.js'; +export { cat } from './cat.js'; +export { add } from './add.js'; +export { rn } from './rn.js'; +export { cp } from './cp.js'; +export { mv } from './mv.js'; +export { rm } from './rm.js'; +export { os } from './os.js'; +export { hash } from './hash.js'; +export { compress } from './compress.js'; +export { decompress } from './decompress.js'; diff --git a/file-manager.js b/file-manager.js index c6a856c..0b02baa 100644 --- a/file-manager.js +++ b/file-manager.js @@ -1,37 +1,7 @@ import { userInfo, homedir } from 'os'; import { Repl } from './repl.js'; -import { up } from './commands/up.js'; -import { cd } from './commands/cd.js'; -import { ls } from './commands/ls.js'; -import { sleep } from './commands/sleep.js'; -import { cat } from './commands/cat.js'; -import { add } from './commands/add.js'; -import { rn } from './commands/rn.js'; -import { cp } from './commands/cp.js'; -import { mv } from './commands/mv.js'; -import { rm } from './commands/rm.js'; -import { os } from './commands/os.js'; -import { hash } from './commands/hash.js'; -import { compress } from './commands/compress.js'; -import { decompress } from './commands/decompress.js'; - -const commands = { - up, - cd, - ls, - sleep, - cat, - add, - rn, - cp, - mv, - rm, - os, - hash, - compress, - decompress, -}; +import * as commands from './commands/index.js'; class FileManager { constructor({ username }) { @@ -43,7 +13,6 @@ class FileManager { this._repl = new Repl(input, output, { prompt: () => `\nYou are currently in ${process.cwd()}\nšŸ¤ > `, context: { - getUsername: () => this._username, writeLine: (str) => this._repl.writeLine(str), output, }, From bfd5e47c1f8242ac1a2747be9c2b7990de286dda Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 01:12:50 +0400 Subject: [PATCH 12/25] fix: fix hanging cat command --- commands/cat.js | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/commands/cat.js b/commands/cat.js index 3abc937..3a32e04 100644 --- a/commands/cat.js +++ b/commands/cat.js @@ -1,7 +1,8 @@ import { createReadStream } from 'fs'; import { realpath, stat } from 'fs/promises'; -import { pipeline } from 'stream/promises'; +import { finished } from 'stream/promises'; import { + CommandAbortError, CommandFailureError, InvalidInputError, rethrowIf, @@ -40,10 +41,17 @@ const cat = { while (paths.length) { const path = paths.shift(); + /** @type {NodeJS.ReadStream} */ let input; try { input = createReadStream(path); - await pipeline(input, output, { signal, end: false }); + // using default pipe because streams/promises pipeline closes + // output stream on completion + input.pipe(output, { end: false }); + signal.addEventListener('abort', () => { + input.destroy(new CommandAbortError()); + }); + await finished(input); } catch (error) { rethrowIfAbort(error); throw new CommandFailureError(error.message, { cause: error }); From 9253e14eeac0322c52d55095d04d1cff99671c24 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 01:13:25 +0400 Subject: [PATCH 13/25] feat: clear line on Ctrl+C when there is input --- repl.js | 60 +++++++++++++++++++++++++++++++++++++++++---------------- 1 file changed, 43 insertions(+), 17 deletions(-) diff --git a/repl.js b/repl.js index c2feaa9..246742b 100644 --- a/repl.js +++ b/repl.js @@ -69,7 +69,6 @@ export class Repl extends EventEmitter { } /** - * * @param {string} name * @param {{ exec: (args: string[], context: any) => any }} command */ @@ -92,15 +91,27 @@ export class Repl extends EventEmitter { /** * @param {object} [options] * @param {AbortSignal} [options.signal] - * @returns + * @returns {{ name: string, args: string[] } | null} */ async prompt() { if (this._closed) { throw new Error('prompt after close'); } const promptString = getValue(this._prompt); - const input = await this._question(promptString); - return parseCommand(input); + + this._questionAbortController = new AbortController(); + const { signal } = this._questionAbortController; + try { + const input = await this._question(promptString, { signal }); + return parseCommand(input); + } catch (error) { + if (isAbortError(error)) { + return null; + } + throw error; + } finally { + this._questionAbortController = null; + } } /** @@ -118,6 +129,10 @@ export class Repl extends EventEmitter { this._rli.on('SIGINT', () => { if (commandAbortController) { commandAbortController.abort(); + return; + } + if (this._rli.cursor > 0) { + this._questionAbortController?.abort(); } else { this._rli.close(); } @@ -128,25 +143,21 @@ export class Repl extends EventEmitter { // eslint-disable-next-line no-constant-condition while (true) { try { - const { name, args } = await this.prompt(); + const parsedInput = await this.prompt(); + if (!parsedInput) { + continue; + } + const { name, args } = parsedInput; const command = this._findCommand(name); - commandAbortController = new AbortController(); - const { signal } = commandAbortController; await command.exec(args, { ...this._context, - signal, + signal: commandAbortController.signal, }); } catch (e) { - if (e instanceof InvalidInputError) { - this.writeLine(`Invalid input (${e.message})`); - } else if (e instanceof CommandFailureError) { - this.writeLine(`Operation failed (${e.message})`); - } else if (isAbortError(e)) { - this.writeLine('Operation cancelled'); - } else { - console.error(e); - this.writeLine('Operation failed'); + const handled = this._handleError(e); + if (!handled) { + throw e; } } finally { commandAbortController = null; @@ -155,6 +166,21 @@ export class Repl extends EventEmitter { })(); } + /** @private */ + _handleError(error) { + if (error instanceof InvalidInputError) { + this.writeLine(`Invalid input (${error.message})`); + } else if (error instanceof CommandFailureError) { + this.writeLine(`Operation failed (${error.message})`); + } else if (isAbortError(error)) { + this.writeLine('Operation cancelled'); + } else { + console.error(error); + this.writeLine('Operation failed'); + } + return true; + } + /** @private */ _handleClose() { this._closed = true; From 4e561d8471eb3350e196254d94b0fc7f283f8338 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 01:17:03 +0400 Subject: [PATCH 14/25] chore: migrate to pnpm --- package-lock.json | 1585 --------------------------------------------- pnpm-lock.yaml | 552 ++++++++++++++++ 2 files changed, 552 insertions(+), 1585 deletions(-) delete mode 100644 package-lock.json create mode 100644 pnpm-lock.yaml diff --git a/package-lock.json b/package-lock.json deleted file mode 100644 index 966f8b6..0000000 --- a/package-lock.json +++ 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sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==} + engines: {node: '>=0.10.0'} + dev: true + + /wrappy/1.0.2: + resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=} + dev: true From 05888cfb29978d5773b8f8771be68af4b381e68c Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 01:26:26 +0400 Subject: [PATCH 15/25] refactor: naming --- file-manager.js | 2 +- repl.js | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/file-manager.js b/file-manager.js index 0b02baa..b9362f9 100644 --- a/file-manager.js +++ b/file-manager.js @@ -31,7 +31,7 @@ class FileManager { this._repl.writeLine('\n\nGoodbye!'); }); - this._repl.start(); + this._repl.startLoop(); } } diff --git a/repl.js b/repl.js index 246742b..c82328f 100644 --- a/repl.js +++ b/repl.js @@ -122,7 +122,7 @@ export class Repl extends EventEmitter { this._output.write('\n'); } - start() { + startLoop() { /** @type {AbortController | null} */ let commandAbortController = null; @@ -155,7 +155,7 @@ export class Repl extends EventEmitter { signal: commandAbortController.signal, }); } catch (e) { - const handled = this._handleError(e); + const handled = this._handleLoopError(e); if (!handled) { throw e; } @@ -167,7 +167,7 @@ export class Repl extends EventEmitter { } /** @private */ - _handleError(error) { + _handleLoopError(error) { if (error instanceof InvalidInputError) { this.writeLine(`Invalid input (${error.message})`); } else if (error instanceof CommandFailureError) { From 32cfdaef7db6b36bc1ba5e969e887330c6c5c64f Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 01:38:20 +0400 Subject: [PATCH 16/25] refactor: command failure error usage --- commands/add.js | 2 +- commands/cat.js | 4 ++-- commands/cd.js | 5 +---- commands/compress.js | 2 +- commands/cp.js | 2 +- commands/decompress.js | 2 +- commands/hash.js | 2 +- commands/ls.js | 2 +- commands/mv.js | 2 +- commands/rm.js | 2 +- commands/rn.js | 2 +- commands/up.js | 2 +- errors.js | 30 +++++++++++++++++++++++++++--- 13 files changed, 40 insertions(+), 19 deletions(-) diff --git a/commands/add.js b/commands/add.js index d3d9b5b..a3fb2ea 100644 --- a/commands/add.js +++ b/commands/add.js @@ -11,7 +11,7 @@ const add = { try { await writeFile(name, '', { flag: 'wx', signal }); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/cat.js b/commands/cat.js index 3a32e04..9f858c5 100644 --- a/commands/cat.js +++ b/commands/cat.js @@ -34,7 +34,7 @@ const cat = { if (error.code === 'ENOENT') { throw new CommandFailureError(`cat: ${path}: no such file`); } - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }) ); @@ -54,7 +54,7 @@ const cat = { await finished(input); } catch (error) { rethrowIfAbort(error); - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } } }, diff --git a/commands/cd.js b/commands/cd.js index 9621132..7279992 100644 --- a/commands/cd.js +++ b/commands/cd.js @@ -12,10 +12,7 @@ const cd = { try { process.chdir(nextDir); } catch (error) { - throw new CommandFailureError( - 'cd: cannot change current working directory', - { cause: error } - ); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/compress.js b/commands/compress.js index 0562ad0..063c2bb 100644 --- a/commands/compress.js +++ b/commands/compress.js @@ -16,7 +16,7 @@ const compress = { await pipeline(input, compressor, output, { signal }); } catch (error) { rethrowIfAbort(error); - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/cp.js b/commands/cp.js index abde97b..c5fd3fd 100644 --- a/commands/cp.js +++ b/commands/cp.js @@ -16,7 +16,7 @@ const cp = { try { await copyFile(from, to, constants.COPYFILE_EXCL); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/decompress.js b/commands/decompress.js index bca1667..6dd9519 100644 --- a/commands/decompress.js +++ b/commands/decompress.js @@ -16,7 +16,7 @@ const decompress = { await pipeline(input, compressor, output, { signal }); } catch (error) { rethrowIfAbort(error); - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/hash.js b/commands/hash.js index dabc2f2..d939bd7 100644 --- a/commands/hash.js +++ b/commands/hash.js @@ -16,7 +16,7 @@ const hash = { await pipeline(input, hasher, { signal }); } catch (error) { rethrowIfAbort(error); - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } writeLine(hasher.digest('hex')); diff --git a/commands/ls.js b/commands/ls.js index 7985e6a..ddf820c 100644 --- a/commands/ls.js +++ b/commands/ls.js @@ -12,7 +12,7 @@ const ls = { try { entries = await readdir(dir, { withFileTypes: true }); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } const output = entries diff --git a/commands/mv.js b/commands/mv.js index 8f07304..43cc51a 100644 --- a/commands/mv.js +++ b/commands/mv.js @@ -16,7 +16,7 @@ const mv = { try { await rename(from, to); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/rm.js b/commands/rm.js index 108d332..eb33d12 100644 --- a/commands/rm.js +++ b/commands/rm.js @@ -11,7 +11,7 @@ const rmCommand = { try { await rm(file); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/rn.js b/commands/rn.js index 5807183..5e576c8 100644 --- a/commands/rn.js +++ b/commands/rn.js @@ -19,7 +19,7 @@ const rn = { try { await rename(from, to); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/commands/up.js b/commands/up.js index c03b4c3..c68b4b2 100644 --- a/commands/up.js +++ b/commands/up.js @@ -11,7 +11,7 @@ const up = { try { process.chdir(nextDir); } catch (error) { - throw new CommandFailureError(error.message, { cause: error }); + throw CommandFailureError.causedBy(error); } }, }; diff --git a/errors.js b/errors.js index a4883f0..e6221e2 100644 --- a/errors.js +++ b/errors.js @@ -2,16 +2,31 @@ class BaseError extends Error { get name() { return this.constructor.name; } + + /** + * @param {string} msg + * @param {object} [details] + */ constructor(msg, details = {}) { super(msg); - // this.name = this.constructor.name; Object.assign(this, details); } } -export class InvalidInputError extends BaseError {} -export class CommandFailureError extends BaseError {} export class CommandAbortError extends BaseError {} +export class InvalidInputError extends BaseError {} +export class CommandFailureError extends BaseError { + /** + * @param {Error} cause + * @returns {CommandFailureError} + */ + static causedBy(cause) { + if (cause instanceof CommandFailureError) { + return cause; + } + return new CommandFailureError(cause.message, { cause }); + } +} /** * @param {Error} error @@ -24,12 +39,21 @@ export function isAbortError(error) { ); } +/** + * @param {Error} error + * @param {new () => Error} type + * @returns {boolean} + */ export function rethrowIf(error, type) { if (error instanceof type) { throw error; } } +/** + * @param {Error} error + * @returns {boolean} + */ export function rethrowIfAbort(error) { if (isAbortError(error)) { throw error; From d76d79cda8fceb080eb008b7cd4ccf627f6d3221 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 04:30:20 +0400 Subject: [PATCH 17/25] refactor: extract path validation --- commands/cat.js | 33 +++++---------------------------- validators/path.js | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+), 28 deletions(-) create mode 100644 validators/path.js diff --git a/commands/cat.js b/commands/cat.js index 9f858c5..98e7802 100644 --- a/commands/cat.js +++ b/commands/cat.js @@ -1,13 +1,12 @@ import { createReadStream } from 'fs'; -import { realpath, stat } from 'fs/promises'; import { finished } from 'stream/promises'; import { CommandAbortError, CommandFailureError, InvalidInputError, - rethrowIf, rethrowIfAbort, } from '../errors.js'; +import { validateStatType } from '../validators/path.js'; const cat = { async exec(args, { signal, output }) { @@ -15,36 +14,14 @@ const cat = { throw new InvalidInputError('cat: argument is required'); } - const paths = await Promise.all( - args.map(async (path) => { - try { - const fileStat = await stat(path); - if (fileStat.isDirectory() || fileStat.isSocket()) { - throw new CommandFailureError(`cat: ${path} is invalid target`); - } - - return await realpath(path); - } catch (error) { - rethrowIf(error, CommandFailureError); - if (error.code === 'EACCES') { - throw new CommandFailureError( - `cat: ${path}: permission denied` - ); - } - if (error.code === 'ENOENT') { - throw new CommandFailureError(`cat: ${path}: no such file`); - } - throw CommandFailureError.causedBy(error); - } - }) - ); + const paths = args.slice(0); while (paths.length) { const path = paths.shift(); - /** @type {NodeJS.ReadStream} */ - let input; + await validateStatType(path, ['file', 'blockDevice', 'characterDevice']); + try { - input = createReadStream(path); + const input = createReadStream(path); // using default pipe because streams/promises pipeline closes // output stream on completion input.pipe(output, { end: false }); diff --git a/validators/path.js b/validators/path.js new file mode 100644 index 0000000..782fb31 --- /dev/null +++ b/validators/path.js @@ -0,0 +1,36 @@ +import { stat } from 'fs/promises'; +import { CommandFailureError } from '../errors.js'; + +/** @type {Record boolean} */ +const statPredicates = { + file: (i) => i.isFile(), + directory: (i) => i.isDirectory(), + blockDevice: (i) => i.isBlockDevice(), + characterDevice: (i) => i.isCharacterDevice(), + fifo: (i) => i.isFIFO(), + socket: (i) => i.isSocket(), +}; + +/** + * @param {string} path + * @param {Array<'file' | 'directory' | 'blockDevice' | 'characterDevice' | 'fifo' | 'socket'>} types + */ +export async function validateStatType(path, types) { + let itemStat; + try { + itemStat = await stat(path); + } catch (error) { + if (error.code === 'EACCES' || error.code === 'ENOENT') { + throw CommandFailureError.causedBy(error); + } + throw error; + } + + const passesTest = types + .filter((t) => statPredicates[t]) + .some((t) => statPredicates[t](itemStat)); + + if (!passesTest) { + throw new CommandFailureError(`${path} is not one of ${types.join(', ')}`); + } +} From d3929f406de1be06fe9702bee5052047db421c6f Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 15:42:19 +0400 Subject: [PATCH 18/25] refactor: extract args length validation --- commands/add.js | 7 +++---- commands/cat.js | 13 +++---------- commands/cd.js | 8 ++++---- commands/compress.js | 8 ++++---- commands/cp.js | 11 ++++++----- commands/decompress.js | 8 ++++---- commands/hash.js | 9 ++++----- commands/ls.js | 8 ++++---- commands/mv.js | 10 +++++----- commands/os.js | 10 +++++----- commands/rm.js | 7 +++---- commands/rn.js | 5 ++--- commands/sleep.js | 5 ++--- commands/up.js | 16 ++++------------ validators/arguments.js | 15 +++++++++++++++ validators/path.js | 42 ++++++++++++++++++++++++++++++++++++++--- 16 files changed, 107 insertions(+), 75 deletions(-) create mode 100644 validators/arguments.js diff --git a/commands/add.js b/commands/add.js index a3fb2ea..07fff31 100644 --- a/commands/add.js +++ b/commands/add.js @@ -1,11 +1,10 @@ import { writeFile } from 'fs/promises'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const add = { async exec(args, { signal }) { - if (args.length < 1) { - throw new InvalidInputError('add: missing argument'); - } + validateArgs({ length: 1 }, args); const [name] = args; try { diff --git a/commands/cat.js b/commands/cat.js index 98e7802..098d385 100644 --- a/commands/cat.js +++ b/commands/cat.js @@ -1,21 +1,14 @@ import { createReadStream } from 'fs'; import { finished } from 'stream/promises'; -import { - CommandAbortError, - CommandFailureError, - InvalidInputError, - rethrowIfAbort, -} from '../errors.js'; +import { CommandAbortError, CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; import { validateStatType } from '../validators/path.js'; const cat = { async exec(args, { signal, output }) { - if (args.length === 0) { - throw new InvalidInputError('cat: argument is required'); - } + validateArgs({ length: { min: 1 } }, args); const paths = args.slice(0); - while (paths.length) { const path = paths.shift(); await validateStatType(path, ['file', 'blockDevice', 'characterDevice']); diff --git a/commands/cd.js b/commands/cd.js index 7279992..0b8a0ba 100644 --- a/commands/cd.js +++ b/commands/cd.js @@ -1,12 +1,12 @@ import { homedir } from 'os'; import { resolve } from 'path'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const cd = { async exec(args) { - if (args.length > 1) { - throw new InvalidInputError('cd: too many arguments'); - } + validateArgs({ length: { min: 0, max: 1 } }, args); + const [dir = homedir()] = args; const nextDir = resolve(process.cwd(), dir); try { diff --git a/commands/compress.js b/commands/compress.js index 063c2bb..9439a0f 100644 --- a/commands/compress.js +++ b/commands/compress.js @@ -1,13 +1,13 @@ import { createReadStream, createWriteStream } from 'fs'; import { pipeline } from 'stream/promises'; import { createBrotliCompress } from 'zlib'; -import { InvalidInputError, CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const compress = { async exec(args, { signal }) { - if (args.length !== 2) { - throw new InvalidInputError('compress: exactly 2 arguments are required'); - } + validateArgs({ length: 2 }, args); + const [from, to] = args; try { const input = createReadStream(from); diff --git a/commands/cp.js b/commands/cp.js index c5fd3fd..54c12d4 100644 --- a/commands/cp.js +++ b/commands/cp.js @@ -1,16 +1,17 @@ import { constants } from 'fs'; import { copyFile } from 'fs/promises'; import { basename, join, resolve } from 'path'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; +import { validateStatType } from '../validators/path.js'; const cp = { async exec(args) { - if (args.length !== 2) { - throw new InvalidInputError('cp: exactly 2 arguments are required'); - } + validateArgs({ length: 2 }, args); - // TODO: validate from is file const [from, toFolder] = args; + await validateStatType(from, 'file'); + const to = join(toFolder, basename(resolve(from))); try { diff --git a/commands/decompress.js b/commands/decompress.js index 6dd9519..dcbc597 100644 --- a/commands/decompress.js +++ b/commands/decompress.js @@ -1,13 +1,13 @@ import { createReadStream, createWriteStream } from 'fs'; import { pipeline } from 'stream/promises'; import { createBrotliDecompress } from 'zlib'; -import { InvalidInputError, CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const decompress = { async exec(args, { signal }) { - if (args.length !== 2) { - throw new InvalidInputError('compress: exactly 2 arguments are required'); - } + validateArgs({ length: 2 }, args); + const [from, to] = args; try { const input = createReadStream(from); diff --git a/commands/hash.js b/commands/hash.js index d939bd7..a0b3e28 100644 --- a/commands/hash.js +++ b/commands/hash.js @@ -1,16 +1,15 @@ import { createHash } from 'crypto'; import { createReadStream } from 'fs'; import { pipeline } from 'stream/promises'; -import { CommandFailureError, InvalidInputError, rethrowIfAbort } from '../errors.js'; +import { CommandFailureError, rethrowIfAbort } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const hash = { async exec(args, { signal, writeLine }) { - if (args.length !== 1) { - throw new InvalidInputError('hash: exactly 1 argument is required'); - } - const [filePath] = args; + validateArgs({ length: 1 }, args); const hasher = createHash('sha256'); + const [filePath] = args; try { const input = createReadStream(filePath); await pipeline(input, hasher, { signal }); diff --git a/commands/ls.js b/commands/ls.js index ddf820c..dd2455f 100644 --- a/commands/ls.js +++ b/commands/ls.js @@ -1,11 +1,11 @@ import { readdir } from 'fs/promises'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const ls = { async exec(args, context) { - if (args.length > 1) { - throw new InvalidInputError('ls: too many arguments'); - } + validateArgs({ length: { max: 1 } }, args); + const [dir = '.'] = args; let entries; diff --git a/commands/mv.js b/commands/mv.js index 43cc51a..b09c95b 100644 --- a/commands/mv.js +++ b/commands/mv.js @@ -1,17 +1,17 @@ import { rename } from 'fs/promises'; import { basename, join, resolve } from 'path'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; +import { validateDoesNotExist } from '../validators/path.js'; const mv = { async exec(args) { - if (args.length !== 2) { - throw new InvalidInputError('mv: exactly 2 arguments are required'); - } + validateArgs({ length: 2 }, args); const [from, toFolder] = args; const to = join(toFolder, basename(resolve(from))); - // TODO: validate `to` does not exist + await validateDoesNotExist(to); try { await rename(from, to); diff --git a/commands/os.js b/commands/os.js index 1fcec11..e764309 100644 --- a/commands/os.js +++ b/commands/os.js @@ -1,7 +1,8 @@ import * as os from 'os'; import { InvalidInputError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; -const eol = os.EOL.replace('\n', '\\n').replace('\r', '\\r'); +const eol = JSON.stringify(os.EOL).slice(1, -1); const subcommands = { EOL: () => eol, @@ -10,7 +11,7 @@ const subcommands = { // prettier-ignore return [ ` - model: ${model}`, - ` speed: ${(speed/1000).toFixed(3)} GHz` + ` speed: ${(speed/1000).toFixed(3)} GHz`, ].join('\n'); }); @@ -30,9 +31,8 @@ const allowedOptions = Object.keys(subcommands).map((k) => '--' + k); const osCommand = { async exec(args, context) { - if (args.length !== 1) { - throw new InvalidInputError('os: exactly 1 argument is required'); - } + validateArgs({ length: 1 }, args); + const [option] = args; if (!allowedOptions.includes(option)) { throw new InvalidInputError(`os: unknown option ${option}`); diff --git a/commands/rm.js b/commands/rm.js index eb33d12..03c63b2 100644 --- a/commands/rm.js +++ b/commands/rm.js @@ -1,11 +1,10 @@ import { rm } from 'fs/promises'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { CommandFailureError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const rmCommand = { async exec(args) { - if (args.length !== 1) { - throw new InvalidInputError('rm: missing argument'); - } + validateArgs({ length: 1 }, args); const [file] = args; try { diff --git a/commands/rn.js b/commands/rn.js index 5e576c8..fe8ec1b 100644 --- a/commands/rn.js +++ b/commands/rn.js @@ -1,12 +1,11 @@ import { rename } from 'fs/promises'; import { dirname, join, resolve, sep } from 'path'; import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const rn = { async exec(args) { - if (args.length !== 2) { - throw new InvalidInputError('rn: exactly 2 arguments are required'); - } + validateArgs({ length: 2 }, args); const [from, toName] = args; diff --git a/commands/sleep.js b/commands/sleep.js index ba45e2f..2c0f259 100644 --- a/commands/sleep.js +++ b/commands/sleep.js @@ -1,10 +1,9 @@ import { CommandAbortError, InvalidInputError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; const sleep = { async exec(args, { signal }) { - if (args.length === 0) { - throw new InvalidInputError('sleep: missing argument'); - } + validateArgs({ length: { min: 1 } }, args); const ms = args.map(Number).map((a, b) => a + b) * 1000; if (Number.isNaN(ms)) { diff --git a/commands/up.js b/commands/up.js index c68b4b2..22bd4cb 100644 --- a/commands/up.js +++ b/commands/up.js @@ -1,18 +1,10 @@ -import { join } from 'path'; -import { CommandFailureError, InvalidInputError } from '../errors.js'; +import { validateArgs } from '../validators/arguments.js'; +import { cd } from './cd.js'; const up = { async exec(args) { - if (args.length > 0) { - throw new InvalidInputError('up: Unexpected arguments'); - } - const currentDir = process.cwd(); - const nextDir = join(currentDir, '..'); - try { - process.chdir(nextDir); - } catch (error) { - throw CommandFailureError.causedBy(error); - } + validateArgs({ length: 0 }, args); + return cd.exec(['..']); }, }; diff --git a/validators/arguments.js b/validators/arguments.js new file mode 100644 index 0000000..ab82647 --- /dev/null +++ b/validators/arguments.js @@ -0,0 +1,15 @@ +import { InvalidInputError } from '../errors.js'; + +function validateArgs({ length }, args) { + const { min = 0, max = Infinity } = + typeof length === 'number' ? { min: length, max: length } : length; + + if (args.length < min) { + throw new InvalidInputError('too few arguments'); + } + if (args.length > max) { + throw new InvalidInputError('too many arguments'); + } +} + +export { validateArgs }; diff --git a/validators/path.js b/validators/path.js index 782fb31..ffff68b 100644 --- a/validators/path.js +++ b/validators/path.js @@ -1,4 +1,5 @@ -import { stat } from 'fs/promises'; +import { constants } from 'fs'; +import { access, stat } from 'fs/promises'; import { CommandFailureError } from '../errors.js'; /** @type {Record boolean} */ @@ -11,11 +12,17 @@ const statPredicates = { socket: (i) => i.isSocket(), }; +/** @typedef {'file' | 'directory' | 'blockDevice' | 'characterDevice' | 'fifo' | 'socket'} FileType */ + /** * @param {string} path - * @param {Array<'file' | 'directory' | 'blockDevice' | 'characterDevice' | 'fifo' | 'socket'>} types + * @param {Array | FileType} types */ export async function validateStatType(path, types) { + if (!Array.isArray(types)) { + types = [types]; + } + let itemStat; try { itemStat = await stat(path); @@ -31,6 +38,35 @@ export async function validateStatType(path, types) { .some((t) => statPredicates[t](itemStat)); if (!passesTest) { - throw new CommandFailureError(`${path} is not one of ${types.join(', ')}`); + const msg = types.length > 1 ? `one of ${types.join(', ')}` : types[0]; + throw new CommandFailureError(`${path} is not ${msg}`); + } +} + +async function exists(path) { + try { + await access(path, constants.R_OK); + return true; + } catch (error) { + if (error.code === 'ENOENT') { + return false; + } + if (error.code === 'EACCES' || error.code === 'EPERM') { + return true; + } + throw error; + } +} + +export async function validateDoesNotExist(path) { + let ex; + try { + ex = await exists(path); + } catch (error) { + throw CommandFailureError.causedBy(error); + } + + if (ex) { + throw new CommandFailureError(`${path} exists`); } } From f10a7469407f3089fc75293b4d08b4c32f95d938 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 15:42:35 +0400 Subject: [PATCH 19/25] refactor: repl loop --- file-manager.js | 9 +++---- repl.js | 68 ++++++++++++++++++++++++------------------------- 2 files changed, 37 insertions(+), 40 deletions(-) diff --git a/file-manager.js b/file-manager.js index b9362f9..940d1b7 100644 --- a/file-manager.js +++ b/file-manager.js @@ -23,15 +23,12 @@ class FileManager { }); } - start({ cwd = homedir() } = {}) { + async start({ cwd = homedir() } = {}) { process.chdir(cwd); this._repl.writeLine(`Hello, ${this._username}!`); - this._repl.on('exit', () => { - this._repl.writeLine('\n\nGoodbye!'); - }); - - this._repl.startLoop(); + await this._repl.startLoop(); + this._repl.writeLine('\n\nGoodbye!'); } } diff --git a/repl.js b/repl.js index c82328f..9236a84 100644 --- a/repl.js +++ b/repl.js @@ -1,5 +1,4 @@ import { createInterface } from 'readline'; -import { EventEmitter } from 'events'; import { promisify } from 'util'; import { CommandFailureError, InvalidInputError, isAbortError } from './errors.js'; @@ -41,20 +40,19 @@ function parseCommand(input) { return { name, args }; } -export class Repl extends EventEmitter { +export class Repl { /** * @param {NodeJS.ReadableStream} [input] * @param {NodeJS.WritableStream} [output] * @param {object} [options] * @param { prompt: string | () => string} [options.prompt] - * @param {object} [options.context] + * @param {object} [options.context] - commands context */ constructor( input = process.stdin, output = process.stdout, { prompt = 'šŸ¤ > ', context = {} } = {} ) { - super(); this._input = input; this._output = output; this._prompt = prompt; @@ -122,48 +120,51 @@ export class Repl extends EventEmitter { this._output.write('\n'); } - startLoop() { + async startLoop() { + if (this._closed) { + throw new Error('start after close'); + } + /** @type {AbortController | null} */ let commandAbortController = null; + let running = true; this._rli.on('SIGINT', () => { if (commandAbortController) { commandAbortController.abort(); return; } - if (this._rli.cursor > 0) { - this._questionAbortController?.abort(); - } else { - this._rli.close(); + if (this._rli.cursor === 0) { + running = false; } + this._questionAbortController?.abort(); }); - // Repl event loop - (async () => { - // eslint-disable-next-line no-constant-condition - while (true) { - try { - const parsedInput = await this.prompt(); - if (!parsedInput) { - continue; - } - const { name, args } = parsedInput; - const command = this._findCommand(name); - commandAbortController = new AbortController(); - await command.exec(args, { - ...this._context, - signal: commandAbortController.signal, - }); - } catch (e) { - const handled = this._handleLoopError(e); - if (!handled) { - throw e; - } - } finally { - commandAbortController = null; + while (running) { + try { + const parsedInput = await this.prompt(); + if (!parsedInput) { + // question was aborted + continue; } + const { name, args } = parsedInput; + const command = this._findCommand(name); + commandAbortController = new AbortController(); + await command.exec(args, { + ...this._context, + signal: commandAbortController.signal, + }); + } catch (e) { + const handled = this._handleLoopError(e); + if (!handled) { + throw e; + } + } finally { + commandAbortController = null; } - })(); + } + + this._rli.close(); } /** @private */ @@ -184,7 +185,6 @@ export class Repl extends EventEmitter { /** @private */ _handleClose() { this._closed = true; - this.emit('exit'); } /** @private */ From 2864bccfdd5843452fb61c06ca0e74d95fcd5af6 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Thu, 9 Jun 2022 16:01:52 +0400 Subject: [PATCH 20/25] refactor: move files to src folder --- {commands => src/commands}/add.js | 0 {commands => src/commands}/cat.js | 0 {commands => src/commands}/cd.js | 0 {commands => src/commands}/compress.js | 0 {commands => src/commands}/cp.js | 0 {commands => src/commands}/decompress.js | 0 {commands => src/commands}/hash.js | 0 {commands => src/commands}/index.js | 0 {commands => src/commands}/ls.js | 0 {commands => src/commands}/mv.js | 0 {commands => src/commands}/os.js | 0 {commands => src/commands}/rm.js | 0 {commands => src/commands}/rn.js | 0 {commands => src/commands}/sleep.js | 0 {commands => src/commands}/up.js | 0 errors.js => src/errors.js | 0 file-manager.js => src/file-manager.js | 0 repl.js => src/repl.js | 0 {validators => src/validators}/arguments.js | 0 {validators => src/validators}/path.js | 0 20 files changed, 0 insertions(+), 0 deletions(-) rename {commands => src/commands}/add.js (100%) rename {commands => src/commands}/cat.js (100%) rename {commands => src/commands}/cd.js (100%) rename {commands => src/commands}/compress.js (100%) rename {commands => src/commands}/cp.js (100%) rename {commands => src/commands}/decompress.js (100%) rename {commands => src/commands}/hash.js (100%) rename {commands => src/commands}/index.js (100%) rename {commands => src/commands}/ls.js (100%) rename {commands => src/commands}/mv.js (100%) rename {commands => src/commands}/os.js (100%) rename {commands => src/commands}/rm.js (100%) rename {commands => src/commands}/rn.js (100%) rename {commands => src/commands}/sleep.js (100%) rename {commands => src/commands}/up.js (100%) rename errors.js => src/errors.js (100%) rename file-manager.js => src/file-manager.js (100%) rename repl.js => src/repl.js (100%) rename {validators => src/validators}/arguments.js (100%) rename {validators => src/validators}/path.js (100%) diff --git a/commands/add.js b/src/commands/add.js similarity index 100% rename from commands/add.js rename to src/commands/add.js diff --git a/commands/cat.js b/src/commands/cat.js similarity index 100% rename from commands/cat.js rename to src/commands/cat.js diff --git a/commands/cd.js b/src/commands/cd.js similarity index 100% rename from commands/cd.js rename to src/commands/cd.js diff --git a/commands/compress.js b/src/commands/compress.js similarity index 100% rename from commands/compress.js rename to src/commands/compress.js diff --git a/commands/cp.js b/src/commands/cp.js similarity index 100% rename from commands/cp.js rename to src/commands/cp.js diff --git a/commands/decompress.js b/src/commands/decompress.js similarity index 100% rename from commands/decompress.js rename to src/commands/decompress.js diff --git a/commands/hash.js b/src/commands/hash.js similarity index 100% rename from commands/hash.js rename to src/commands/hash.js diff --git a/commands/index.js b/src/commands/index.js similarity index 100% rename from commands/index.js rename to src/commands/index.js diff --git a/commands/ls.js b/src/commands/ls.js similarity index 100% rename from commands/ls.js rename to src/commands/ls.js diff --git a/commands/mv.js b/src/commands/mv.js similarity index 100% rename from commands/mv.js rename to src/commands/mv.js diff --git a/commands/os.js b/src/commands/os.js similarity index 100% rename from commands/os.js rename to src/commands/os.js diff --git a/commands/rm.js b/src/commands/rm.js similarity index 100% rename from commands/rm.js rename to src/commands/rm.js diff --git a/commands/rn.js b/src/commands/rn.js similarity index 100% rename from commands/rn.js rename to src/commands/rn.js diff --git a/commands/sleep.js b/src/commands/sleep.js similarity index 100% rename from commands/sleep.js rename to src/commands/sleep.js diff --git a/commands/up.js b/src/commands/up.js similarity index 100% rename from commands/up.js rename to src/commands/up.js diff --git a/errors.js b/src/errors.js similarity index 100% rename from errors.js rename to src/errors.js diff --git a/file-manager.js b/src/file-manager.js similarity index 100% rename from file-manager.js rename to src/file-manager.js diff --git a/repl.js b/src/repl.js similarity index 100% rename from repl.js rename to src/repl.js diff --git a/validators/arguments.js b/src/validators/arguments.js similarity index 100% rename from validators/arguments.js rename to src/validators/arguments.js diff --git a/validators/path.js b/src/validators/path.js similarity index 100% rename from validators/path.js rename to src/validators/path.js From c513e6c6b752e958d4bc17db1ca5dd685b6c7086 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Fri, 10 Jun 2022 04:11:09 +0400 Subject: [PATCH 21/25] feat: validate node version --- index.js | 8 ++++++++ package.json | 2 +- src/file-manager.js | 5 ++--- src/validators/node.js | 22 ++++++++++++++++++++++ 4 files changed, 33 insertions(+), 4 deletions(-) create mode 100644 index.js create mode 100644 src/validators/node.js diff --git a/index.js b/index.js new file mode 100644 index 0000000..efc9293 --- /dev/null +++ b/index.js @@ -0,0 +1,8 @@ +import { userInfo } from 'os'; +import { validateNodeVersion } from './src/validators/node.js'; +import { FileManager } from './src/file-manager.js'; + +validateNodeVersion(); + +const fm = new FileManager({ username: userInfo().username }); +fm.start({ cwd: '.' }); diff --git a/package.json b/package.json index aa637e1..e6734b6 100644 --- a/package.json +++ b/package.json @@ -5,7 +5,7 @@ "main": "index.js", "type": "module", "scripts": { - "start": "node ./cli.js" + "start": "node ./index.js" }, "keywords": [], "author": "", diff --git a/src/file-manager.js b/src/file-manager.js index 940d1b7..6ac0b4e 100644 --- a/src/file-manager.js +++ b/src/file-manager.js @@ -1,4 +1,4 @@ -import { userInfo, homedir } from 'os'; +import { homedir } from 'os'; import { Repl } from './repl.js'; import * as commands from './commands/index.js'; @@ -32,5 +32,4 @@ class FileManager { } } -const fm = new FileManager({ username: userInfo().username }); -fm.start({ cwd: '.' }); +export { FileManager }; diff --git a/src/validators/node.js b/src/validators/node.js new file mode 100644 index 0000000..2a313dc --- /dev/null +++ b/src/validators/node.js @@ -0,0 +1,22 @@ +import { createInterface } from 'readline'; +import { PassThrough } from 'stream'; + +export function validateNodeVersion() { + const i = new PassThrough(); + const o = new PassThrough(); + const rli = createInterface(i, o); + try { + const ac = new AbortController(); + rli.question('', { signal: ac.signal }, () => {}); + i.write('\n'); + rli.close(); + return; + } catch (e) { + if (e instanceof RangeError) { + const version = process.version; + console.error(`Node ${version} is not supported`); + process.exit(1); + } + throw e; + } +} From 69c4bc5545525299f08f065ed295194f6caad09c Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Fri, 10 Jun 2022 18:28:33 +0400 Subject: [PATCH 22/25] feat: parse username cmd parameter --- index.js | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/index.js b/index.js index efc9293..58d0727 100644 --- a/index.js +++ b/index.js @@ -1,8 +1,33 @@ -import { userInfo } from 'os'; +import { homedir, userInfo } from 'os'; import { validateNodeVersion } from './src/validators/node.js'; import { FileManager } from './src/file-manager.js'; +import { realpath } from 'fs/promises'; validateNodeVersion(); -const fm = new FileManager({ username: userInfo().username }); -fm.start({ cwd: '.' }); +const options = process.argv.slice(2).reduce( + (opts, arg) => { + const [k, v] = arg.replace(/^--/, '').split('='); + if (v) { + opts[k] = v; + } else { + opts._.push(k); + } + return opts; + }, + { _: [] } +); + +const { username = userInfo().username } = options; + +let cwd = homedir(); +if (options._[0]) { + try { + cwd = await realpath(options._[0]); + } catch (error) { + // ignore + } +} + +const fm = new FileManager({ username }); +await fm.start({ cwd }); From cbb752e8226c7818a351044794b1bd3cb9f07317 Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Fri, 10 Jun 2022 18:29:25 +0400 Subject: [PATCH 23/25] feat: .exit command --- src/repl.js | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/repl.js b/src/repl.js index 9236a84..220874b 100644 --- a/src/repl.js +++ b/src/repl.js @@ -148,6 +148,9 @@ export class Repl { continue; } const { name, args } = parsedInput; + if (name === '.exit') { + break; + } const command = this._findCommand(name); commandAbortController = new AbortController(); await command.exec(args, { From 17f509dda0600dcf6063ddcd1e177fedc583b06c Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Fri, 10 Jun 2022 18:35:38 +0400 Subject: [PATCH 24/25] feat: goodbye message --- src/file-manager.js | 2 +- src/repl.js | 14 -------------- 2 files changed, 1 insertion(+), 15 deletions(-) diff --git a/src/file-manager.js b/src/file-manager.js index 6ac0b4e..26c0c47 100644 --- a/src/file-manager.js +++ b/src/file-manager.js @@ -28,7 +28,7 @@ class FileManager { this._repl.writeLine(`Hello, ${this._username}!`); await this._repl.startLoop(); - this._repl.writeLine('\n\nGoodbye!'); + this._repl.writeLine(`\nThank you for using File Manager, ${this._username}!`); } } diff --git a/src/repl.js b/src/repl.js index 220874b..d827412 100644 --- a/src/repl.js +++ b/src/repl.js @@ -58,12 +58,10 @@ export class Repl { this._prompt = prompt; this._context = context; - this._closed = false; this._commands = new Map(); this._rli = createInterface(input, output); this._question = promisify(this._rli.question).bind(this._rli); - this._rli.on('close', () => this._handleClose()); } /** @@ -92,9 +90,6 @@ export class Repl { * @returns {{ name: string, args: string[] } | null} */ async prompt() { - if (this._closed) { - throw new Error('prompt after close'); - } const promptString = getValue(this._prompt); this._questionAbortController = new AbortController(); @@ -121,10 +116,6 @@ export class Repl { } async startLoop() { - if (this._closed) { - throw new Error('start after close'); - } - /** @type {AbortController | null} */ let commandAbortController = null; let running = true; @@ -185,11 +176,6 @@ export class Repl { return true; } - /** @private */ - _handleClose() { - this._closed = true; - } - /** @private */ _findCommand(name) { const command = this._commands.get(name); From 74efa14ec083eecf59e5e09968ac02af20c2100c Mon Sep 17 00:00:00 2001 From: qeteq <1577026+qeteq@users.noreply.github.com> Date: Sat, 11 Jun 2022 06:40:01 +0400 Subject: [PATCH 25/25] refactor: simplify command parser using matchAll --- src/repl.js | 32 ++++++++++++-------------------- 1 file changed, 12 insertions(+), 20 deletions(-) diff --git a/src/repl.js b/src/repl.js index d827412..07b3869 100644 --- a/src/repl.js +++ b/src/repl.js @@ -5,36 +5,28 @@ import { CommandFailureError, InvalidInputError, isAbortError } from './errors.j const getValue = (x) => (typeof x === 'function' ? x() : x); -const inputWordRe = /^(?:([^'"\s]+)|'([^']*)'|"([^"]*)")/; +const inputWordRe = /(?:([^'"\s]+)|'([^']*)'|"([^"]*)")\s*/g; /** * @param {string} input * @returns {{ name: string, args: string[] }} */ function parseCommand(input) { - let name = ''; - const args = []; - input = input.trim(); + const matches = [...input.matchAll(inputWordRe)]; - while (input.length) { - const match = input.match(inputWordRe); - if (!match) { - throw new InvalidInputError('Invalid input'); - } - const [substring, ...rest] = match; - const word = rest.find((x) => x !== undefined); + const matchesLength = matches.map((m) => m[0].length).reduce((a, b) => a + b); + if (matchesLength !== input.length) { + throw new InvalidInputError('Invalid input'); + } - if (!name) { - if (!word) { - throw new InvalidInputError('Command is required'); - } - name = word; - } else { - args.push(word); - } + const [name, ...args] = matches.map((match) => { + // find one of 3 matching groups containing argument + return [...match].slice(1).find((x) => x !== undefined); + }); - input = input.slice(substring.length).trim(); + if (!name) { + throw new InvalidInputError('Command is required'); } return { name, args };