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import { field, Level, logger } from "@coder/logger"
import { promises as fs } from "fs"
import yaml from "js-yaml"
import * as os from "os"
import * as path from "path"
import { canConnect, generateCertificate, generatePassword, humanPath, paths, isNodeJSErrnoException } from "./util"
const DEFAULT_SOCKET_PATH = path.join(os.tmpdir(), "vscode-ipc")
export enum Feature {
// No current experimental features!
Placeholder = "placeholder",
}
export enum AuthType {
Password = "password",
None = "none",
}
export class Optional<T> {
public constructor(public readonly value?: T) {}
}
export enum LogLevel {
Trace = "trace",
Debug = "debug",
Info = "info",
Warn = "warn",
Error = "error",
}
export class OptionalString extends Optional<string> {}
/**
* Code flags provided by the user.
*/
export interface UserProvidedCodeArgs {
"disable-telemetry"?: boolean
force?: boolean
"user-data-dir"?: string
"enable-proposed-api"?: string[]
"extensions-dir"?: string
"builtin-extensions-dir"?: string
"install-extension"?: string[]
"uninstall-extension"?: string[]
"list-extensions"?: boolean
"locate-extension"?: string[]
"show-versions"?: boolean
category?: string
"github-auth"?: string
"disable-update-check"?: boolean
"disable-file-downloads"?: boolean
}
/**
* Arguments that the user explicitly provided on the command line. All
* arguments must be optional.
*
* For arguments with defaults see DefaultedArgs.
*/
export interface UserProvidedArgs extends UserProvidedCodeArgs {
config?: string
auth?: AuthType
password?: string
"hashed-password"?: string
cert?: OptionalString
"cert-host"?: string
"cert-key"?: string
enable?: string[]
help?: boolean
host?: string
locale?: string
port?: number
json?: boolean
log?: LogLevel
open?: boolean
"bind-addr"?: string
socket?: string
"socket-mode"?: string
version?: boolean
"proxy-domain"?: string[]
"reuse-window"?: boolean
"new-window"?: boolean
"ignore-last-opened"?: boolean
link?: OptionalString
verbose?: boolean
/* Positional arguments. */
_?: string[]
}
interface Option<T> {
type: T
/**
* Short flag for the option.
*/
short?: string
/**
* Whether the option is a path and should be resolved.
*/
path?: boolean
/**
* Description of the option. Leave blank to hide the option.
*/
description?: string
/**
* If marked as deprecated, the option is marked as deprecated in help.
*/
deprecated?: boolean
}
type OptionType<T> = T extends boolean
? "boolean"
: T extends OptionalString
? typeof OptionalString
: T extends LogLevel
? typeof LogLevel
: T extends AuthType
? typeof AuthType
: T extends number
? "number"
: T extends string
? "string"
: T extends string[]
? "string[]"
: "unknown"
export type Options<T> = {
[P in keyof T]: Option<OptionType<T[P]>>
}
export const options: Options<Required<UserProvidedArgs>> = {
auth: { type: AuthType, description: "The type of authentication to use." },
password: {
type: "string",
description: "The password for password authentication (can only be passed in via $PASSWORD or the config file).",
},
"hashed-password": {
type: "string",
description:
"The password hashed with argon2 for password authentication (can only be passed in via $HASHED_PASSWORD or the config file). \n" +
"Takes precedence over 'password'.",
},
cert: {
type: OptionalString,
path: true,
description: "Path to certificate. A self signed certificate is generated if none is provided.",
},
"cert-host": {
type: "string",
description: "Hostname to use when generating a self signed certificate.",
},
"cert-key": { type: "string", path: true, description: "Path to certificate key when using non-generated cert." },
"disable-telemetry": { type: "boolean", description: "Disable telemetry." },
"disable-update-check": {
type: "boolean",
description:
"Disable update check. Without this flag, code-server checks every 6 hours against the latest github release and \n" +
"then notifies you once every week that a new release is available.",
},
"disable-file-downloads": {
type: "boolean",
description:
"Disable file downloads from Code. This can also be set with CS_DISABLE_FILE_DOWNLOADS set to 'true' or '1'.",
},
// --enable can be used to enable experimental features. These features
// provide no guarantees.
enable: { type: "string[]" },
help: { type: "boolean", short: "h", description: "Show this output." },
json: { type: "boolean" },
locale: { type: "string" }, // The preferred way to set the locale is via the UI.
open: { type: "boolean", description: "Open in browser on startup. Does not work remotely." },
"bind-addr": {
type: "string",
description: "Address to bind to in host:port. You can also use $PORT to override the port.",
},
config: {
type: "string",
description: "Path to yaml config file. Every flag maps directly to a key in the config file.",
},
// These two have been deprecated by bindAddr.
host: { type: "string", description: "" },
port: { type: "number", description: "" },
socket: { type: "string", path: true, description: "Path to a socket (bind-addr will be ignored)." },
"socket-mode": { type: "string", description: "File mode of the socket." },
version: { type: "boolean", short: "v", description: "Display version information." },
_: { type: "string[]" },
"user-data-dir": { type: "string", path: true, description: "Path to the user data directory." },
"extensions-dir": { type: "string", path: true, description: "Path to the extensions directory." },
"builtin-extensions-dir": { type: "string", path: true },
"list-extensions": { type: "boolean", description: "List installed VS Code extensions." },
force: { type: "boolean", description: "Avoid prompts when installing VS Code extensions." },
"locate-extension": { type: "string[]" },
category: { type: "string" },
"install-extension": {
type: "string[]",
description:
"Install or update a VS Code extension by id or vsix. The identifier of an extension is `${publisher}.${name}`.\n" +
"To install a specific version provide `@${version}`. For example: 'vscode.csharp@1.2.3'.",
},
"enable-proposed-api": {
type: "string[]",
description:
"Enable proposed API features for extensions. Can receive one or more extension IDs to enable individually.",
},
"uninstall-extension": { type: "string[]", description: "Uninstall a VS Code extension by id." },
"show-versions": { type: "boolean", description: "Show VS Code extension versions." },
"github-auth": {
type: "string",
description: "GitHub authentication token (can only be passed in via $GITHUB_TOKEN or the config file).",
},
"proxy-domain": { type: "string[]", description: "Domain used for proxying ports." },
"ignore-last-opened": {
type: "boolean",
short: "e",
description: "Ignore the last opened directory or workspace in favor of an empty window.",
},
"new-window": {
type: "boolean",
short: "n",
description: "Force to open a new window.",
},
"reuse-window": {
type: "boolean",
short: "r",
description: "Force to open a file or folder in an already opened window.",
},
log: { type: LogLevel },
verbose: { type: "boolean", short: "vvv", description: "Enable verbose logging." },
link: {
type: OptionalString,
description: `
Securely bind code-server via our cloud service with the passed name. You'll get a URL like
https://hostname-username.coder.co at which you can easily access your code-server instance.
Authorization is done via GitHub.
`,
deprecated: true,
},
}
export const optionDescriptions = (opts: Partial<Options<Required<UserProvidedArgs>>> = options): string[] => {
const entries = Object.entries(opts).filter(([, v]) => !!v.description)
const widths = entries.reduce(
(prev, [k, v]) => ({
long: k.length > prev.long ? k.length : prev.long,
short: v.short && v.short.length > prev.short ? v.short.length : prev.short,
}),
{ short: 0, long: 0 },
)
return entries.map(([k, v]) => {
const help = `${" ".repeat(widths.short - (v.short ? v.short.length : 0))}${v.short ? `-${v.short}` : " "} --${k} `
return (
help +
v.description
?.trim()
.split(/\n/)
.map((line, i) => {
line = line.trim()
if (i === 0) {
return " ".repeat(widths.long - k.length) + (v.deprecated ? "(deprecated) " : "") + line
}
return " ".repeat(widths.long + widths.short + 6) + line
})
.join("\n") +
(typeof v.type === "object" ? ` [${Object.values(v.type).join(", ")}]` : "")
)
})
}
export function splitOnFirstEquals(str: string): string[] {
// we use regex instead of "=" to ensure we split at the first
// "=" and return the following substring with it
// important for the hashed-password which looks like this
// $argon2i$v=19$m=4096,t=3,p=1$0qR/o+0t00hsbJFQCKSfdQ$oFcM4rL6o+B7oxpuA4qlXubypbBPsf+8L531U7P9HYY
// 2 means return two items
// Source: https://stackoverflow.com/a/4607799/3015595
// We use the ? to say the the substr after the = is optional
const split = str.split(/=(.+)?/, 2)
return split
}
/**
* Parse arguments into UserProvidedArgs. This should not go beyond checking
* that arguments are valid types and have values when required.
*/
export const parse = (
argv: string[],
opts?: {
configFile?: string
},
): UserProvidedArgs => {
const error = (msg: string): Error => {
if (opts?.configFile) {
msg = `error reading ${opts.configFile}: ${msg}`
}
return new Error(msg)
}
const args: UserProvidedArgs = {}
let ended = false
for (let i = 0; i < argv.length; ++i) {
const arg = argv[i]
// -- signals the end of option parsing.
if (!ended && arg === "--") {
ended = true
continue
}
// Options start with a dash and require a value if non-boolean.
if (!ended && arg.startsWith("-")) {
let key: keyof UserProvidedArgs | undefined
let value: string | undefined
if (arg.startsWith("--")) {
const split = splitOnFirstEquals(arg.replace(/^--/, ""))
key = split[0] as keyof UserProvidedArgs
value = split[1]
} else {
const short = arg.replace(/^-/, "")
const pair = Object.entries(options).find(([, v]) => v.short === short)
if (pair) {
key = pair[0] as keyof UserProvidedArgs
}
}
if (!key || !options[key]) {
throw error(`Unknown option ${arg}`)
}
if (key === "password" && !opts?.configFile) {
throw new Error("--password can only be set in the config file or passed in via $PASSWORD")
}
if (key === "hashed-password" && !opts?.configFile) {
throw new Error("--hashed-password can only be set in the config file or passed in via $HASHED_PASSWORD")
}
if (key === "github-auth" && !opts?.configFile) {
throw new Error("--github-auth can only be set in the config file or passed in via $GITHUB_TOKEN")
}
const option = options[key]
if (option.type === "boolean") {
;(args[key] as boolean) = true
continue
}
// Might already have a value if it was the --long=value format.
if (typeof value === "undefined") {
// A value is only valid if it doesn't look like an option.
value = argv[i + 1] && !argv[i + 1].startsWith("-") ? argv[++i] : undefined
}
if (!value && option.type === OptionalString) {
;(args[key] as OptionalString) = new OptionalString(value)
continue
} else if (!value) {
throw error(`--${key} requires a value`)
}
if (option.type === OptionalString && value === "false") {
continue
}
if (option.path) {
value = path.resolve(value)
}
switch (option.type) {
case "string":
;(args[key] as string) = value
break
case "string[]":
if (!args[key]) {
;(args[key] as string[]) = []
}
;(args[key] as string[]).push(value)
break
case "number":
;(args[key] as number) = parseInt(value, 10)
if (isNaN(args[key] as number)) {
throw error(`--${key} must be a number`)
}
break
case OptionalString:
;(args[key] as OptionalString) = new OptionalString(value)
break
default: {
if (!Object.values(option.type).includes(value)) {
throw error(`--${key} valid values: [${Object.values(option.type).join(", ")}]`)
}
;(args[key] as string) = value
break
}
}
continue
}
// Everything else goes into _.
if (typeof args._ === "undefined") {
args._ = []
}
args._.push(arg)
}
// If a cert was provided a key must also be provided.
if (args.cert && args.cert.value && !args["cert-key"]) {
throw new Error("--cert-key is missing")
}
logger.debug(() => [
`parsed ${opts?.configFile ? "config" : "command line"}`,
field("args", {
...args,
password: args.password ? "<redacted>" : undefined,
"hashed-password": args["hashed-password"] ? "<redacted>" : undefined,
"github-auth": args["github-auth"] ? "<redacted>" : undefined,
}),
])
return args
}
/**
* User-provided arguments with defaults. The distinction between user-provided
* args and defaulted args exists so we can tell the difference between end
* values and what the user actually provided on the command line.
*/
export interface DefaultedArgs extends ConfigArgs {
auth: AuthType
cert?: {
value: string
}
host: string
port: number
"proxy-domain": string[]
verbose: boolean
usingEnvPassword: boolean
usingEnvHashedPassword: boolean
"extensions-dir": string
"user-data-dir": string
/* Positional arguments. */
_: string[]
}
/**
* Take CLI and config arguments (optional) and return a single set of arguments
* with the defaults set. Arguments from the CLI are prioritized over config
* arguments.
*/
export async function setDefaults(cliArgs: UserProvidedArgs, configArgs?: ConfigArgs): Promise<DefaultedArgs> {
const args = Object.assign({}, configArgs || {}, cliArgs)
if (!args["user-data-dir"]) {
args["user-data-dir"] = paths.data
}
if (!args["extensions-dir"]) {
args["extensions-dir"] = path.join(args["user-data-dir"], "extensions")
}
// --verbose takes priority over --log and --log takes priority over the
// environment variable.
if (args.verbose) {
args.log = LogLevel.Trace
} else if (
!args.log &&
process.env.LOG_LEVEL &&
Object.values(LogLevel).includes(process.env.LOG_LEVEL as LogLevel)
) {
args.log = process.env.LOG_LEVEL as LogLevel
}
// Sync --log, --verbose, the environment variable, and logger level.
if (args.log) {
process.env.LOG_LEVEL = args.log
}
switch (args.log) {
case LogLevel.Trace:
logger.level = Level.Trace
args.verbose = true
break
case LogLevel.Debug:
logger.level = Level.Debug
args.verbose = false
break
case LogLevel.Info:
logger.level = Level.Info
args.verbose = false
break
case LogLevel.Warn:
logger.level = Level.Warning
args.verbose = false
break
case LogLevel.Error:
logger.level = Level.Error
args.verbose = false
break
}
// Default to using a password.
if (!args.auth) {
args.auth = AuthType.Password
}
const addr = bindAddrFromAllSources(configArgs || {}, cliArgs)
args.host = addr.host
args.port = addr.port
// If we're being exposed to the cloud, we listen on a random address and
// disable auth.
if (args.link) {
args.host = "localhost"
args.port = 0
args.socket = undefined
args["socket-mode"] = undefined
args.cert = undefined
args.auth = AuthType.None
}
if (args.cert && !args.cert.value) {
const { cert, certKey } = await generateCertificate(args["cert-host"] || "localhost")
args.cert = {
value: cert,
}
args["cert-key"] = certKey
}
let usingEnvPassword = !!process.env.PASSWORD
if (process.env.PASSWORD) {
args.password = process.env.PASSWORD
}
if (process.env.CS_DISABLE_FILE_DOWNLOADS?.match(/^(1|true)$/)) {
args["disable-file-downloads"] = true
}
const usingEnvHashedPassword = !!process.env.HASHED_PASSWORD
if (process.env.HASHED_PASSWORD) {
args["hashed-password"] = process.env.HASHED_PASSWORD
usingEnvPassword = false
}
if (process.env.GITHUB_TOKEN) {
args["github-auth"] = process.env.GITHUB_TOKEN
}
// Ensure they're not readable by child processes.
delete process.env.PASSWORD
delete process.env.HASHED_PASSWORD
delete process.env.GITHUB_TOKEN
// Filter duplicate proxy domains and remove any leading `*.`.
const proxyDomains = new Set((args["proxy-domain"] || []).map((d) => d.replace(/^\*\./, "")))
args["proxy-domain"] = Array.from(proxyDomains)
if (typeof args._ === "undefined") {
args._ = []
}
return {
...args,
usingEnvPassword,
usingEnvHashedPassword,
} as DefaultedArgs // TODO: Technically no guarantee this is fulfilled.
}
/**
* Helper function to return the default config file.
*
* @param {string} password - Password passed in (usually from generatePassword())
* @returns The default config file:
*
* - bind-addr: 127.0.0.1:8080
* - auth: password
* - password: <password>
* - cert: false
*/
export function defaultConfigFile(password: string): string {
return `bind-addr: 127.0.0.1:8080
auth: password
password: ${password}
cert: false
`
}
interface ConfigArgs extends UserProvidedArgs {
config: string
}
/**
* Reads the code-server yaml config file and returns it as Args.
*
* @param configPath Read the config from configPath instead of $CODE_SERVER_CONFIG or the default.
*/
export async function readConfigFile(configPath?: string): Promise<ConfigArgs> {
if (!configPath) {
configPath = process.env.CODE_SERVER_CONFIG
if (!configPath) {
configPath = path.join(paths.config, "config.yaml")
}
}
await fs.mkdir(path.dirname(configPath), { recursive: true })
try {
const generatedPassword = await generatePassword()
await fs.writeFile(configPath, defaultConfigFile(generatedPassword), {
flag: "wx", // wx means to fail if the path exists.
})
logger.info(`Wrote default config file to ${humanPath(os.homedir(), configPath)}`)
} catch (error: any) {
// EEXIST is fine; we don't want to overwrite existing configurations.
if (error.code !== "EEXIST") {
throw error
}
}
const configFile = await fs.readFile(configPath, "utf8")
return parseConfigFile(configFile, configPath)
}
/**
* parseConfigFile parses configFile into ConfigArgs.
* configPath is used as the filename in error messages
*/
export function parseConfigFile(configFile: string, configPath: string): ConfigArgs {
if (!configFile) {
return { config: configPath }
}
const config = yaml.load(configFile, {
filename: configPath,
})
if (!config || typeof config === "string") {
throw new Error(`invalid config: ${config}`)
}
// We convert the config file into a set of flags.
// This is a temporary measure until we add a proper CLI library.
const configFileArgv = Object.entries(config).map(([optName, opt]) => {
if (opt === true) {
return `--${optName}`
}
return `--${optName}=${opt}`
})
const args = parse(configFileArgv, {
configFile: configPath,
})
return {
...args,
config: configPath,
}
}
function parseBindAddr(bindAddr: string): Addr {
const u = new URL(`http://${bindAddr}`)
return {
host: u.hostname,
// With the http scheme 80 will be dropped so assume it's 80 if missing.
// This means --bind-addr <addr> without a port will default to 80 as well
// and not the code-server default.
port: u.port ? parseInt(u.port, 10) : 80,
}
}
interface Addr {
host: string
port: number
}
/**
* This function creates the bind address
* using the CLI args.
*/
export function bindAddrFromArgs(addr: Addr, args: UserProvidedArgs): Addr {
addr = { ...addr }
if (args["bind-addr"]) {
addr = parseBindAddr(args["bind-addr"])
}
if (args.host) {
addr.host = args.host
}
if (process.env.PORT) {
addr.port = parseInt(process.env.PORT, 10)
}
if (args.port !== undefined) {
addr.port = args.port
}
return addr
}
function bindAddrFromAllSources(...argsConfig: UserProvidedArgs[]): Addr {
let addr: Addr = {
host: "localhost",
port: 8080,
}
for (const args of argsConfig) {
addr = bindAddrFromArgs(addr, args)
}
return addr
}
/**
* Reads the socketPath based on path passed in.
*
* The one usually passed in is the DEFAULT_SOCKET_PATH.
*
* If it can't read the path, it throws an error and returns undefined.
*/
export async function readSocketPath(path: string): Promise<string | undefined> {
try {
return await fs.readFile(path, "utf8")
} catch (error) {
// If it doesn't exist, we don't care.
// But if it fails for some reason, we should throw.
// We want to surface that to the user.
if (!isNodeJSErrnoException(error) || error.code !== "ENOENT") {
throw error
}
}
return undefined
}
/**
* Determine if it looks like the user is trying to open a file or folder in an
* existing instance. The arguments here should be the arguments the user
* explicitly passed on the command line, *NOT DEFAULTS* or the configuration.
*/
export const shouldOpenInExistingInstance = async (args: UserProvidedArgs): Promise<string | undefined> => {
// Always use the existing instance if we're running from VS Code's terminal.
if (process.env.VSCODE_IPC_HOOK_CLI) {
logger.debug("Found VSCODE_IPC_HOOK_CLI")
return process.env.VSCODE_IPC_HOOK_CLI
}
// If these flags are set then assume the user is trying to open in an
// existing instance since these flags have no effect otherwise.
const openInFlagCount = ["reuse-window", "new-window"].reduce((prev, cur) => {
return args[cur as keyof UserProvidedArgs] ? prev + 1 : prev
}, 0)
if (openInFlagCount > 0) {
logger.debug("Found --reuse-window or --new-window")
return readSocketPath(DEFAULT_SOCKET_PATH)
}
// It's possible the user is trying to spawn another instance of code-server.
// 1. Check if any unrelated flags are set (this should only run when
// code-server is invoked exactly like this: `code-server my-file`).
// 2. That a file or directory was passed.
// 3. That the socket is active.
if (Object.keys(args).length === 1 && typeof args._ !== "undefined" && args._.length > 0) {
const socketPath = await readSocketPath(DEFAULT_SOCKET_PATH)
if (socketPath && (await canConnect(socketPath))) {
logger.debug("Found existing code-server socket")
return socketPath
}
}
return undefined
}
/**
* Arguments for running Code's server.
*
* A subset of ../../lib/vscode/src/vs/server/node/serverEnvironmentService.ts:90
*/
export interface CodeArgs extends UserProvidedCodeArgs {
"accept-server-license-terms"?: boolean
"connection-token"?: string
help: boolean
port?: string
version: boolean
"without-connection-token"?: boolean
"without-browser-env-var"?: boolean
compatibility: string
}
/**
* Types for ../../lib/vscode/src/vs/server/node/server.main.ts:65.
*/
export type SpawnCodeCli = (args: CodeArgs) => Promise<void>
/**
* Convert our arguments to VS Code server arguments.
*/
export const toCodeArgs = async (args: DefaultedArgs): Promise<CodeArgs> => {
return {
...args,
"accept-server-license-terms": true,
// This seems to be used to make the connection token flags optional (when
// set to 1.63) but we have always included them.
compatibility: "1.64",
/** Type casting. */
help: !!args.help,
version: !!args.version,
port: args.port?.toString(),
}
}
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