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Update app and tooling

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This commit is contained in:
Lawrence Chen 2026-01-29 17:36:26 -08:00
parent 3046531bdd
commit e620ec7349
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node_modules/@vercel/cervel/node_modules/execa/index.d.ts generated vendored Normal file
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/// <reference types="node"/>
import {ChildProcess} from 'child_process';
import {Stream, Readable as ReadableStream} from 'stream';
declare namespace execa {
type StdioOption =
| 'pipe'
| 'ipc'
| 'ignore'
| 'inherit'
| Stream
| number
| undefined;
interface CommonOptions<EncodingType> {
/**
Kill the spawned process when the parent process exits unless either:
- the spawned process is [`detached`](https://nodejs.org/api/child_process.html#child_process_options_detached)
- the parent process is terminated abruptly, for example, with `SIGKILL` as opposed to `SIGTERM` or a normal exit
@default true
*/
readonly cleanup?: boolean;
/**
Prefer locally installed binaries when looking for a binary to execute.
If you `$ npm install foo`, you can then `execa('foo')`.
@default false
*/
readonly preferLocal?: boolean;
/**
Preferred path to find locally installed binaries in (use with `preferLocal`).
@default process.cwd()
*/
readonly localDir?: string;
/**
Path to the Node.js executable to use in child processes.
This can be either an absolute path or a path relative to the `cwd` option.
Requires `preferLocal` to be `true`.
For example, this can be used together with [`get-node`](https://github.com/ehmicky/get-node) to run a specific Node.js version in a child process.
@default process.execPath
*/
readonly execPath?: string;
/**
Buffer the output from the spawned process. When set to `false`, you must read the output of `stdout` and `stderr` (or `all` if the `all` option is `true`). Otherwise the returned promise will not be resolved/rejected.
If the spawned process fails, `error.stdout`, `error.stderr`, and `error.all` will contain the buffered data.
@default true
*/
readonly buffer?: boolean;
/**
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
@default 'pipe'
*/
readonly stdin?: StdioOption;
/**
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
@default 'pipe'
*/
readonly stdout?: StdioOption;
/**
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
@default 'pipe'
*/
readonly stderr?: StdioOption;
/**
Setting this to `false` resolves the promise with the error instead of rejecting it.
@default true
*/
readonly reject?: boolean;
/**
Add an `.all` property on the promise and the resolved value. The property contains the output of the process with `stdout` and `stderr` interleaved.
@default false
*/
readonly all?: boolean;
/**
Strip the final [newline character](https://en.wikipedia.org/wiki/Newline) from the output.
@default true
*/
readonly stripFinalNewline?: boolean;
/**
Set to `false` if you don't want to extend the environment variables when providing the `env` property.
@default true
*/
readonly extendEnv?: boolean;
/**
Current working directory of the child process.
@default process.cwd()
*/
readonly cwd?: string;
/**
Environment key-value pairs. Extends automatically from `process.env`. Set `extendEnv` to `false` if you don't want this.
@default process.env
*/
readonly env?: NodeJS.ProcessEnv;
/**
Explicitly set the value of `argv[0]` sent to the child process. This will be set to `command` or `file` if not specified.
*/
readonly argv0?: string;
/**
Child's [stdio](https://nodejs.org/api/child_process.html#child_process_options_stdio) configuration.
@default 'pipe'
*/
readonly stdio?: 'pipe' | 'ignore' | 'inherit' | readonly StdioOption[];
/**
Prepare child to run independently of its parent process. Specific behavior [depends on the platform](https://nodejs.org/api/child_process.html#child_process_options_detached).
@default false
*/
readonly detached?: boolean;
/**
Sets the user identity of the process.
*/
readonly uid?: number;
/**
Sets the group identity of the process.
*/
readonly gid?: number;
/**
If `true`, runs `command` inside of a shell. Uses `/bin/sh` on UNIX and `cmd.exe` on Windows. A different shell can be specified as a string. The shell should understand the `-c` switch on UNIX or `/d /s /c` on Windows.
We recommend against using this option since it is:
- not cross-platform, encouraging shell-specific syntax.
- slower, because of the additional shell interpretation.
- unsafe, potentially allowing command injection.
@default false
*/
readonly shell?: boolean | string;
/**
Specify the character encoding used to decode the `stdout` and `stderr` output. If set to `null`, then `stdout` and `stderr` will be a `Buffer` instead of a string.
@default 'utf8'
*/
readonly encoding?: EncodingType;
/**
If `timeout` is greater than `0`, the parent will send the signal identified by the `killSignal` property (the default is `SIGTERM`) if the child runs longer than `timeout` milliseconds.
@default 0
*/
readonly timeout?: number;
/**
Largest amount of data in bytes allowed on `stdout` or `stderr`. Default: 100 MB.
@default 100_000_000
*/
readonly maxBuffer?: number;
/**
Signal value to be used when the spawned process will be killed.
@default 'SIGTERM'
*/
readonly killSignal?: string | number;
/**
If `true`, no quoting or escaping of arguments is done on Windows. Ignored on other platforms. This is set to `true` automatically when the `shell` option is `true`.
@default false
*/
readonly windowsVerbatimArguments?: boolean;
}
interface Options<EncodingType = string> extends CommonOptions<EncodingType> {
/**
Write some input to the `stdin` of your binary.
*/
readonly input?: string | Buffer | ReadableStream;
}
interface SyncOptions<EncodingType = string> extends CommonOptions<EncodingType> {
/**
Write some input to the `stdin` of your binary.
*/
readonly input?: string | Buffer;
}
interface NodeOptions<EncodingType = string> extends Options<EncodingType> {
/**
The Node.js executable to use.
@default process.execPath
*/
readonly nodePath?: string;
/**
List of [CLI options](https://nodejs.org/api/cli.html#cli_options) passed to the Node.js executable.
@default process.execArgv
*/
readonly nodeOptions?: string[];
}
interface ExecaReturnBase<StdoutStderrType> {
/**
The file and arguments that were run.
*/
command: string;
/**
The numeric exit code of the process that was run.
*/
exitCode: number;
/**
The output of the process on stdout.
*/
stdout: StdoutStderrType;
/**
The output of the process on stderr.
*/
stderr: StdoutStderrType;
/**
Whether the process failed to run.
*/
failed: boolean;
/**
Whether the process timed out.
*/
timedOut: boolean;
/**
Whether the process was killed.
*/
killed: boolean;
/**
The name of the signal that was used to terminate the process. For example, `SIGFPE`.
If a signal terminated the process, this property is defined and included in the error message. Otherwise it is `undefined`.
*/
signal?: string;
/**
A human-friendly description of the signal that was used to terminate the process. For example, `Floating point arithmetic error`.
If a signal terminated the process, this property is defined and included in the error message. Otherwise it is `undefined`. It is also `undefined` when the signal is very uncommon which should seldomly happen.
*/
signalDescription?: string;
}
interface ExecaSyncReturnValue<StdoutErrorType = string>
extends ExecaReturnBase<StdoutErrorType> {
}
/**
Result of a child process execution. On success this is a plain object. On failure this is also an `Error` instance.
The child process fails when:
- its exit code is not `0`
- it was killed with a signal
- timing out
- being canceled
- there's not enough memory or there are already too many child processes
*/
interface ExecaReturnValue<StdoutErrorType = string>
extends ExecaSyncReturnValue<StdoutErrorType> {
/**
The output of the process with `stdout` and `stderr` interleaved.
This is `undefined` if either:
- the `all` option is `false` (default value)
- `execa.sync()` was used
*/
all?: StdoutErrorType;
/**
Whether the process was canceled.
*/
isCanceled: boolean;
}
interface ExecaSyncError<StdoutErrorType = string>
extends Error,
ExecaReturnBase<StdoutErrorType> {
/**
The error message.
*/
message: string;
/**
Original error message. This is `undefined` unless the child process exited due to an `error` event or a timeout.
The `message` property contains both the `originalMessage` and some additional information added by Execa.
*/
originalMessage?: string;
}
interface ExecaError<StdoutErrorType = string>
extends ExecaSyncError<StdoutErrorType> {
/**
The output of the process with `stdout` and `stderr` interleaved.
This is `undefined` if either:
- the `all` option is `false` (default value)
- `execa.sync()` was used
*/
all?: StdoutErrorType;
/**
Whether the process was canceled.
*/
isCanceled: boolean;
}
interface KillOptions {
/**
Milliseconds to wait for the child process to terminate before sending `SIGKILL`.
Can be disabled with `false`.
@default 5000
*/
forceKillAfterTimeout?: number | false;
}
interface ExecaChildPromise<StdoutErrorType> {
catch<ResultType = never>(
onRejected?: (reason: ExecaError<StdoutErrorType>) => ResultType | PromiseLike<ResultType>
): Promise<ExecaReturnValue<StdoutErrorType> | ResultType>;
/**
Same as the original [`child_process#kill()`](https://nodejs.org/api/child_process.html#child_process_subprocess_kill_signal), except if `signal` is `SIGTERM` (the default value) and the child process is not terminated after 5 seconds, force it by sending `SIGKILL`.
*/
kill(signal?: string, options?: execa.KillOptions): void;
/**
Similar to [`childProcess.kill()`](https://nodejs.org/api/child_process.html#child_process_subprocess_kill_signal). This is preferred when cancelling the child process execution as the error is more descriptive and [`childProcessResult.isCanceled`](#iscanceled) is set to `true`.
*/
cancel(): void;
/**
Stream combining/interleaving [`stdout`](https://nodejs.org/api/child_process.html#child_process_subprocess_stdout) and [`stderr`](https://nodejs.org/api/child_process.html#child_process_subprocess_stderr).
This is `undefined` if either:
- the `all` option is `false` (the default value)
- both `stdout` and `stderr` options are set to [`'inherit'`, `'ipc'`, `Stream` or `integer`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio)
*/
all?: ReadableStream;
}
type ExecaChildProcess<StdoutErrorType = string> = ChildProcess &
ExecaChildPromise<StdoutErrorType> &
Promise<ExecaReturnValue<StdoutErrorType>>;
}
declare const execa: {
/**
Execute a file.
Think of this as a mix of `child_process.execFile` and `child_process.spawn`.
@param file - The program/script to execute.
@param arguments - Arguments to pass to `file` on execution.
@returns A [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess), which is enhanced to also be a `Promise` for a result `Object` with `stdout` and `stderr` properties.
@example
```
import execa from 'execa';
(async () => {
const {stdout} = await execa('echo', ['unicorns']);
console.log(stdout);
//=> 'unicorns'
// Cancelling a spawned process
const subprocess = execa('node');
setTimeout(() => { spawned.cancel() }, 1000);
try {
await subprocess;
} catch (error) {
console.log(subprocess.killed); // true
console.log(error.isCanceled); // true
}
})();
// Pipe the child process stdout to the current stdout
execa('echo', ['unicorns']).stdout.pipe(process.stdout);
```
*/
(
file: string,
arguments?: readonly string[],
options?: execa.Options
): execa.ExecaChildProcess;
(
file: string,
arguments?: readonly string[],
options?: execa.Options<null>
): execa.ExecaChildProcess<Buffer>;
(file: string, options?: execa.Options): execa.ExecaChildProcess;
(file: string, options?: execa.Options<null>): execa.ExecaChildProcess<
Buffer
>;
/**
Execute a file synchronously.
This method throws an `Error` if the command fails.
@param file - The program/script to execute.
@param arguments - Arguments to pass to `file` on execution.
@returns A result `Object` with `stdout` and `stderr` properties.
*/
sync(
file: string,
arguments?: readonly string[],
options?: execa.SyncOptions
): execa.ExecaSyncReturnValue;
sync(
file: string,
arguments?: readonly string[],
options?: execa.SyncOptions<null>
): execa.ExecaSyncReturnValue<Buffer>;
sync(file: string, options?: execa.SyncOptions): execa.ExecaSyncReturnValue;
sync(
file: string,
options?: execa.SyncOptions<null>
): execa.ExecaSyncReturnValue<Buffer>;
/**
Same as `execa()` except both file and arguments are specified in a single `command` string. For example, `execa('echo', ['unicorns'])` is the same as `execa.command('echo unicorns')`.
If the file or an argument contains spaces, they must be escaped with backslashes. This matters especially if `command` is not a constant but a variable, for example with `__dirname` or `process.cwd()`. Except for spaces, no escaping/quoting is needed.
The `shell` option must be used if the `command` uses shell-specific features, as opposed to being a simple `file` followed by its `arguments`.
@param command - The program/script to execute and its arguments.
@returns A [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess), which is enhanced to also be a `Promise` for a result `Object` with `stdout` and `stderr` properties.
@example
```
import execa from 'execa';
(async () => {
const {stdout} = await execa.command('echo unicorns');
console.log(stdout);
//=> 'unicorns'
})();
```
*/
command(command: string, options?: execa.Options): execa.ExecaChildProcess;
command(command: string, options?: execa.Options<null>): execa.ExecaChildProcess<Buffer>;
/**
Same as `execa.command()` but synchronous.
@param command - The program/script to execute and its arguments.
@returns A result `Object` with `stdout` and `stderr` properties.
*/
commandSync(command: string, options?: execa.SyncOptions): execa.ExecaSyncReturnValue;
commandSync(command: string, options?: execa.SyncOptions<null>): execa.ExecaSyncReturnValue<Buffer>;
/**
Execute a Node.js script as a child process.
Same as `execa('node', [scriptPath, ...arguments], options)` except (like [`child_process#fork()`](https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options)):
- the current Node version and options are used. This can be overridden using the `nodePath` and `nodeArguments` options.
- the `shell` option cannot be used
- an extra channel [`ipc`](https://nodejs.org/api/child_process.html#child_process_options_stdio) is passed to [`stdio`](#stdio)
@param scriptPath - Node.js script to execute.
@param arguments - Arguments to pass to `scriptPath` on execution.
@returns A [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess), which is enhanced to also be a `Promise` for a result `Object` with `stdout` and `stderr` properties.
*/
node(
scriptPath: string,
arguments?: readonly string[],
options?: execa.NodeOptions
): execa.ExecaChildProcess;
node(
scriptPath: string,
arguments?: readonly string[],
options?: execa.Options<null>
): execa.ExecaChildProcess<Buffer>;
node(scriptPath: string, options?: execa.Options): execa.ExecaChildProcess;
node(scriptPath: string, options?: execa.Options<null>): execa.ExecaChildProcess<Buffer>;
};
export = execa;

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'use strict';
const path = require('path');
const childProcess = require('child_process');
const crossSpawn = require('cross-spawn');
const stripFinalNewline = require('strip-final-newline');
const npmRunPath = require('npm-run-path');
const onetime = require('onetime');
const makeError = require('./lib/error');
const normalizeStdio = require('./lib/stdio');
const {spawnedKill, spawnedCancel, setupTimeout, setExitHandler} = require('./lib/kill');
const {handleInput, getSpawnedResult, makeAllStream, validateInputSync} = require('./lib/stream.js');
const {mergePromise, getSpawnedPromise} = require('./lib/promise.js');
const {joinCommand, parseCommand} = require('./lib/command.js');
const DEFAULT_MAX_BUFFER = 1000 * 1000 * 100;
const getEnv = ({env: envOption, extendEnv, preferLocal, localDir, execPath}) => {
const env = extendEnv ? {...process.env, ...envOption} : envOption;
if (preferLocal) {
return npmRunPath.env({env, cwd: localDir, execPath});
}
return env;
};
const handleArgs = (file, args, options = {}) => {
const parsed = crossSpawn._parse(file, args, options);
file = parsed.command;
args = parsed.args;
options = parsed.options;
options = {
maxBuffer: DEFAULT_MAX_BUFFER,
buffer: true,
stripFinalNewline: true,
extendEnv: true,
preferLocal: false,
localDir: options.cwd || process.cwd(),
execPath: process.execPath,
encoding: 'utf8',
reject: true,
cleanup: true,
all: false,
...options,
windowsHide: true
};
options.env = getEnv(options);
options.stdio = normalizeStdio(options);
if (process.platform === 'win32' && path.basename(file, '.exe') === 'cmd') {
// #116
args.unshift('/q');
}
return {file, args, options, parsed};
};
const handleOutput = (options, value, error) => {
if (typeof value !== 'string' && !Buffer.isBuffer(value)) {
// When `execa.sync()` errors, we normalize it to '' to mimic `execa()`
return error === undefined ? undefined : '';
}
if (options.stripFinalNewline) {
return stripFinalNewline(value);
}
return value;
};
const execa = (file, args, options) => {
const parsed = handleArgs(file, args, options);
const command = joinCommand(file, args);
let spawned;
try {
spawned = childProcess.spawn(parsed.file, parsed.args, parsed.options);
} catch (error) {
// Ensure the returned error is always both a promise and a child process
const dummySpawned = new childProcess.ChildProcess();
const errorPromise = Promise.reject(makeError({
error,
stdout: '',
stderr: '',
all: '',
command,
parsed,
timedOut: false,
isCanceled: false,
killed: false
}));
return mergePromise(dummySpawned, errorPromise);
}
const spawnedPromise = getSpawnedPromise(spawned);
const timedPromise = setupTimeout(spawned, parsed.options, spawnedPromise);
const processDone = setExitHandler(spawned, parsed.options, timedPromise);
const context = {isCanceled: false};
spawned.kill = spawnedKill.bind(null, spawned.kill.bind(spawned));
spawned.cancel = spawnedCancel.bind(null, spawned, context);
const handlePromise = async () => {
const [{error, exitCode, signal, timedOut}, stdoutResult, stderrResult, allResult] = await getSpawnedResult(spawned, parsed.options, processDone);
const stdout = handleOutput(parsed.options, stdoutResult);
const stderr = handleOutput(parsed.options, stderrResult);
const all = handleOutput(parsed.options, allResult);
if (error || exitCode !== 0 || signal !== null) {
const returnedError = makeError({
error,
exitCode,
signal,
stdout,
stderr,
all,
command,
parsed,
timedOut,
isCanceled: context.isCanceled,
killed: spawned.killed
});
if (!parsed.options.reject) {
return returnedError;
}
throw returnedError;
}
return {
command,
exitCode: 0,
stdout,
stderr,
all,
failed: false,
timedOut: false,
isCanceled: false,
killed: false
};
};
const handlePromiseOnce = onetime(handlePromise);
crossSpawn._enoent.hookChildProcess(spawned, parsed.parsed);
handleInput(spawned, parsed.options.input);
spawned.all = makeAllStream(spawned, parsed.options);
return mergePromise(spawned, handlePromiseOnce);
};
module.exports = execa;
module.exports.sync = (file, args, options) => {
const parsed = handleArgs(file, args, options);
const command = joinCommand(file, args);
validateInputSync(parsed.options);
let result;
try {
result = childProcess.spawnSync(parsed.file, parsed.args, parsed.options);
} catch (error) {
throw makeError({
error,
stdout: '',
stderr: '',
all: '',
command,
parsed,
timedOut: false,
isCanceled: false,
killed: false
});
}
const stdout = handleOutput(parsed.options, result.stdout, result.error);
const stderr = handleOutput(parsed.options, result.stderr, result.error);
if (result.error || result.status !== 0 || result.signal !== null) {
const error = makeError({
stdout,
stderr,
error: result.error,
signal: result.signal,
exitCode: result.status,
command,
parsed,
timedOut: result.error && result.error.code === 'ETIMEDOUT',
isCanceled: false,
killed: result.signal !== null
});
if (!parsed.options.reject) {
return error;
}
throw error;
}
return {
command,
exitCode: 0,
stdout,
stderr,
failed: false,
timedOut: false,
isCanceled: false,
killed: false
};
};
module.exports.command = (command, options) => {
const [file, ...args] = parseCommand(command);
return execa(file, args, options);
};
module.exports.commandSync = (command, options) => {
const [file, ...args] = parseCommand(command);
return execa.sync(file, args, options);
};
module.exports.node = (scriptPath, args, options = {}) => {
if (args && !Array.isArray(args) && typeof args === 'object') {
options = args;
args = [];
}
const stdio = normalizeStdio.node(options);
const {nodePath = process.execPath, nodeOptions = process.execArgv} = options;
return execa(
nodePath,
[
...nodeOptions,
scriptPath,
...(Array.isArray(args) ? args : [])
],
{
...options,
stdin: undefined,
stdout: undefined,
stderr: undefined,
stdio,
shell: false
}
);
};

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'use strict';
const SPACES_REGEXP = / +/g;
const joinCommand = (file, args = []) => {
if (!Array.isArray(args)) {
return file;
}
return [file, ...args].join(' ');
};
// Allow spaces to be escaped by a backslash if not meant as a delimiter
const handleEscaping = (tokens, token, index) => {
if (index === 0) {
return [token];
}
const previousToken = tokens[tokens.length - 1];
if (previousToken.endsWith('\\')) {
return [...tokens.slice(0, -1), `${previousToken.slice(0, -1)} ${token}`];
}
return [...tokens, token];
};
// Handle `execa.command()`
const parseCommand = command => {
return command
.trim()
.split(SPACES_REGEXP)
.reduce(handleEscaping, []);
};
module.exports = {
joinCommand,
parseCommand
};

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'use strict';
const {signalsByName} = require('human-signals');
const getErrorPrefix = ({timedOut, timeout, errorCode, signal, signalDescription, exitCode, isCanceled}) => {
if (timedOut) {
return `timed out after ${timeout} milliseconds`;
}
if (isCanceled) {
return 'was canceled';
}
if (errorCode !== undefined) {
return `failed with ${errorCode}`;
}
if (signal !== undefined) {
return `was killed with ${signal} (${signalDescription})`;
}
if (exitCode !== undefined) {
return `failed with exit code ${exitCode}`;
}
return 'failed';
};
const makeError = ({
stdout,
stderr,
all,
error,
signal,
exitCode,
command,
timedOut,
isCanceled,
killed,
parsed: {options: {timeout}}
}) => {
// `signal` and `exitCode` emitted on `spawned.on('exit')` event can be `null`.
// We normalize them to `undefined`
exitCode = exitCode === null ? undefined : exitCode;
signal = signal === null ? undefined : signal;
const signalDescription = signal === undefined ? undefined : signalsByName[signal].description;
const errorCode = error && error.code;
const prefix = getErrorPrefix({timedOut, timeout, errorCode, signal, signalDescription, exitCode, isCanceled});
const message = `Command ${prefix}: ${command}`;
if (error instanceof Error) {
error.originalMessage = error.message;
error.message = `${message}\n${error.message}`;
} else {
error = new Error(message);
}
error.command = command;
error.exitCode = exitCode;
error.signal = signal;
error.signalDescription = signalDescription;
error.stdout = stdout;
error.stderr = stderr;
if (all !== undefined) {
error.all = all;
}
if ('bufferedData' in error) {
delete error.bufferedData;
}
error.failed = true;
error.timedOut = Boolean(timedOut);
error.isCanceled = isCanceled;
error.killed = killed && !timedOut;
return error;
};
module.exports = makeError;

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'use strict';
const os = require('os');
const onExit = require('signal-exit');
const pFinally = require('p-finally');
const DEFAULT_FORCE_KILL_TIMEOUT = 1000 * 5;
// Monkey-patches `childProcess.kill()` to add `forceKillAfterTimeout` behavior
const spawnedKill = (kill, signal = 'SIGTERM', options = {}) => {
const killResult = kill(signal);
setKillTimeout(kill, signal, options, killResult);
return killResult;
};
const setKillTimeout = (kill, signal, options, killResult) => {
if (!shouldForceKill(signal, options, killResult)) {
return;
}
const timeout = getForceKillAfterTimeout(options);
setTimeout(() => {
kill('SIGKILL');
}, timeout).unref();
};
const shouldForceKill = (signal, {forceKillAfterTimeout}, killResult) => {
return isSigterm(signal) && forceKillAfterTimeout !== false && killResult;
};
const isSigterm = signal => {
return signal === os.constants.signals.SIGTERM ||
(typeof signal === 'string' && signal.toUpperCase() === 'SIGTERM');
};
const getForceKillAfterTimeout = ({forceKillAfterTimeout = true}) => {
if (forceKillAfterTimeout === true) {
return DEFAULT_FORCE_KILL_TIMEOUT;
}
if (!Number.isInteger(forceKillAfterTimeout) || forceKillAfterTimeout < 0) {
throw new TypeError(`Expected the \`forceKillAfterTimeout\` option to be a non-negative integer, got \`${forceKillAfterTimeout}\` (${typeof forceKillAfterTimeout})`);
}
return forceKillAfterTimeout;
};
// `childProcess.cancel()`
const spawnedCancel = (spawned, context) => {
const killResult = spawned.kill();
if (killResult) {
context.isCanceled = true;
}
};
const timeoutKill = (spawned, signal, reject) => {
spawned.kill(signal);
reject(Object.assign(new Error('Timed out'), {timedOut: true, signal}));
};
// `timeout` option handling
const setupTimeout = (spawned, {timeout, killSignal = 'SIGTERM'}, spawnedPromise) => {
if (timeout === 0 || timeout === undefined) {
return spawnedPromise;
}
if (!Number.isInteger(timeout) || timeout < 0) {
throw new TypeError(`Expected the \`timeout\` option to be a non-negative integer, got \`${timeout}\` (${typeof timeout})`);
}
let timeoutId;
const timeoutPromise = new Promise((resolve, reject) => {
timeoutId = setTimeout(() => {
timeoutKill(spawned, killSignal, reject);
}, timeout);
});
const safeSpawnedPromise = pFinally(spawnedPromise, () => {
clearTimeout(timeoutId);
});
return Promise.race([timeoutPromise, safeSpawnedPromise]);
};
// `cleanup` option handling
const setExitHandler = (spawned, {cleanup, detached}, timedPromise) => {
if (!cleanup || detached) {
return timedPromise;
}
const removeExitHandler = onExit(() => {
spawned.kill();
});
// TODO: Use native "finally" syntax when targeting Node.js 10
return pFinally(timedPromise, removeExitHandler);
};
module.exports = {
spawnedKill,
spawnedCancel,
setupTimeout,
setExitHandler
};

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'use strict';
const mergePromiseProperty = (spawned, promise, property) => {
// Starting the main `promise` is deferred to avoid consuming streams
const value = typeof promise === 'function' ?
(...args) => promise()[property](...args) :
promise[property].bind(promise);
Object.defineProperty(spawned, property, {
value,
writable: true,
enumerable: false,
configurable: true
});
};
// The return value is a mixin of `childProcess` and `Promise`
const mergePromise = (spawned, promise) => {
mergePromiseProperty(spawned, promise, 'then');
mergePromiseProperty(spawned, promise, 'catch');
// TODO: Remove the `if`-guard when targeting Node.js 10
if (Promise.prototype.finally) {
mergePromiseProperty(spawned, promise, 'finally');
}
return spawned;
};
// Use promises instead of `child_process` events
const getSpawnedPromise = spawned => {
return new Promise((resolve, reject) => {
spawned.on('exit', (exitCode, signal) => {
resolve({exitCode, signal});
});
spawned.on('error', error => {
reject(error);
});
if (spawned.stdin) {
spawned.stdin.on('error', error => {
reject(error);
});
}
});
};
module.exports = {
mergePromise,
getSpawnedPromise
};

52
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'use strict';
const aliases = ['stdin', 'stdout', 'stderr'];
const hasAlias = opts => aliases.some(alias => opts[alias] !== undefined);
const normalizeStdio = opts => {
if (!opts) {
return;
}
const {stdio} = opts;
if (stdio === undefined) {
return aliases.map(alias => opts[alias]);
}
if (hasAlias(opts)) {
throw new Error(`It's not possible to provide \`stdio\` in combination with one of ${aliases.map(alias => `\`${alias}\``).join(', ')}`);
}
if (typeof stdio === 'string') {
return stdio;
}
if (!Array.isArray(stdio)) {
throw new TypeError(`Expected \`stdio\` to be of type \`string\` or \`Array\`, got \`${typeof stdio}\``);
}
const length = Math.max(stdio.length, aliases.length);
return Array.from({length}, (value, index) => stdio[index]);
};
module.exports = normalizeStdio;
// `ipc` is pushed unless it is already present
module.exports.node = opts => {
const stdio = normalizeStdio(opts);
if (stdio === 'ipc') {
return 'ipc';
}
if (stdio === undefined || typeof stdio === 'string') {
return [stdio, stdio, stdio, 'ipc'];
}
if (stdio.includes('ipc')) {
return stdio;
}
return [...stdio, 'ipc'];
};

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'use strict';
const isStream = require('is-stream');
const getStream = require('get-stream');
const mergeStream = require('merge-stream');
// `input` option
const handleInput = (spawned, input) => {
// Checking for stdin is workaround for https://github.com/nodejs/node/issues/26852
// TODO: Remove `|| spawned.stdin === undefined` once we drop support for Node.js <=12.2.0
if (input === undefined || spawned.stdin === undefined) {
return;
}
if (isStream(input)) {
input.pipe(spawned.stdin);
} else {
spawned.stdin.end(input);
}
};
// `all` interleaves `stdout` and `stderr`
const makeAllStream = (spawned, {all}) => {
if (!all || (!spawned.stdout && !spawned.stderr)) {
return;
}
const mixed = mergeStream();
if (spawned.stdout) {
mixed.add(spawned.stdout);
}
if (spawned.stderr) {
mixed.add(spawned.stderr);
}
return mixed;
};
// On failure, `result.stdout|stderr|all` should contain the currently buffered stream
const getBufferedData = async (stream, streamPromise) => {
if (!stream) {
return;
}
stream.destroy();
try {
return await streamPromise;
} catch (error) {
return error.bufferedData;
}
};
const getStreamPromise = (stream, {encoding, buffer, maxBuffer}) => {
if (!stream || !buffer) {
return;
}
if (encoding) {
return getStream(stream, {encoding, maxBuffer});
}
return getStream.buffer(stream, {maxBuffer});
};
// Retrieve result of child process: exit code, signal, error, streams (stdout/stderr/all)
const getSpawnedResult = async ({stdout, stderr, all}, {encoding, buffer, maxBuffer}, processDone) => {
const stdoutPromise = getStreamPromise(stdout, {encoding, buffer, maxBuffer});
const stderrPromise = getStreamPromise(stderr, {encoding, buffer, maxBuffer});
const allPromise = getStreamPromise(all, {encoding, buffer, maxBuffer: maxBuffer * 2});
try {
return await Promise.all([processDone, stdoutPromise, stderrPromise, allPromise]);
} catch (error) {
return Promise.all([
{error, signal: error.signal, timedOut: error.timedOut},
getBufferedData(stdout, stdoutPromise),
getBufferedData(stderr, stderrPromise),
getBufferedData(all, allPromise)
]);
}
};
const validateInputSync = ({input}) => {
if (isStream(input)) {
throw new TypeError('The `input` option cannot be a stream in sync mode');
}
};
module.exports = {
handleInput,
makeAllStream,
getSpawnedResult,
validateInputSync
};

9
node_modules/@vercel/cervel/node_modules/execa/license generated vendored Normal file
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MIT License
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

52
node_modules/@vercel/cervel/node_modules/execa/node_modules/get-stream/buffer-stream.js generated vendored Normal file
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'use strict';
const {PassThrough: PassThroughStream} = require('stream');
module.exports = options => {
options = {...options};
const {array} = options;
let {encoding} = options;
const isBuffer = encoding === 'buffer';
let objectMode = false;
if (array) {
objectMode = !(encoding || isBuffer);
} else {
encoding = encoding || 'utf8';
}
if (isBuffer) {
encoding = null;
}
const stream = new PassThroughStream({objectMode});
if (encoding) {
stream.setEncoding(encoding);
}
let length = 0;
const chunks = [];
stream.on('data', chunk => {
chunks.push(chunk);
if (objectMode) {
length = chunks.length;
} else {
length += chunk.length;
}
});
stream.getBufferedValue = () => {
if (array) {
return chunks;
}
return isBuffer ? Buffer.concat(chunks, length) : chunks.join('');
};
stream.getBufferedLength = () => length;
return stream;
};

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/// <reference types="node"/>
import {Stream} from 'stream';
declare class MaxBufferErrorClass extends Error {
readonly name: 'MaxBufferError';
constructor();
}
declare namespace getStream {
interface Options {
/**
Maximum length of the returned string. If it exceeds this value before the stream ends, the promise will be rejected with a `MaxBufferError` error.
@default Infinity
*/
readonly maxBuffer?: number;
}
interface OptionsWithEncoding<EncodingType = BufferEncoding> extends Options {
/**
[Encoding](https://nodejs.org/api/buffer.html#buffer_buffer) of the incoming stream.
@default 'utf8'
*/
readonly encoding?: EncodingType;
}
type MaxBufferError = MaxBufferErrorClass;
}
declare const getStream: {
/**
Get the `stream` as a string.
@returns A promise that resolves when the end event fires on the stream, indicating that there is no more data to be read. The stream is switched to flowing mode.
@example
```
import * as fs from 'fs';
import getStream = require('get-stream');
(async () => {
const stream = fs.createReadStream('unicorn.txt');
console.log(await getStream(stream));
// ,,))))))));,
// __)))))))))))))),
// \|/ -\(((((''''((((((((.
// -*-==//////(('' . `)))))),
// /|\ ))| o ;-. '((((( ,(,
// ( `| / ) ;))))' ,_))^;(~
// | | | ,))((((_ _____------~~~-. %,;(;(>';'~
// o_); ; )))(((` ~---~ `:: \ %%~~)(v;(`('~
// ; ''''```` `: `:::|\,__,%% );`'; ~
// | _ ) / `:|`----' `-'
// ______/\/~ | / /
// /~;;.____/;;' / ___--,-( `;;;/
// / // _;______;'------~~~~~ /;;/\ /
// // | | / ; \;;,\
// (<_ | ; /',/-----' _>
// \_| ||_ //~;~~~~~~~~~
// `\_| (,~~
// \~\
// ~~
})();
```
*/
(stream: Stream, options?: getStream.OptionsWithEncoding): Promise<string>;
/**
Get the `stream` as a buffer.
It honors the `maxBuffer` option as above, but it refers to byte length rather than string length.
*/
buffer(
stream: Stream,
options?: getStream.OptionsWithEncoding
): Promise<Buffer>;
/**
Get the `stream` as an array of values.
It honors both the `maxBuffer` and `encoding` options. The behavior changes slightly based on the encoding chosen:
- When `encoding` is unset, it assumes an [object mode stream](https://nodesource.com/blog/understanding-object-streams/) and collects values emitted from `stream` unmodified. In this case `maxBuffer` refers to the number of items in the array (not the sum of their sizes).
- When `encoding` is set to `buffer`, it collects an array of buffers. `maxBuffer` refers to the summed byte lengths of every buffer in the array.
- When `encoding` is set to anything else, it collects an array of strings. `maxBuffer` refers to the summed character lengths of every string in the array.
*/
array<StreamObjectModeType>(
stream: Stream,
options?: getStream.Options
): Promise<StreamObjectModeType[]>;
array(
stream: Stream,
options: getStream.OptionsWithEncoding<'buffer'>
): Promise<Buffer[]>;
array(
stream: Stream,
options: getStream.OptionsWithEncoding<BufferEncoding>
): Promise<string[]>;
MaxBufferError: typeof MaxBufferErrorClass;
// TODO: Remove this for the next major release
default: typeof getStream;
};
export = getStream;

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'use strict';
const {constants: BufferConstants} = require('buffer');
const pump = require('pump');
const bufferStream = require('./buffer-stream');
class MaxBufferError extends Error {
constructor() {
super('maxBuffer exceeded');
this.name = 'MaxBufferError';
}
}
async function getStream(inputStream, options) {
if (!inputStream) {
return Promise.reject(new Error('Expected a stream'));
}
options = {
maxBuffer: Infinity,
...options
};
const {maxBuffer} = options;
let stream;
await new Promise((resolve, reject) => {
const rejectPromise = error => {
// Don't retrieve an oversized buffer.
if (error && stream.getBufferedLength() <= BufferConstants.MAX_LENGTH) {
error.bufferedData = stream.getBufferedValue();
}
reject(error);
};
stream = pump(inputStream, bufferStream(options), error => {
if (error) {
rejectPromise(error);
return;
}
resolve();
});
stream.on('data', () => {
if (stream.getBufferedLength() > maxBuffer) {
rejectPromise(new MaxBufferError());
}
});
});
return stream.getBufferedValue();
}
module.exports = getStream;
// TODO: Remove this for the next major release
module.exports.default = getStream;
module.exports.buffer = (stream, options) => getStream(stream, {...options, encoding: 'buffer'});
module.exports.array = (stream, options) => getStream(stream, {...options, array: true});
module.exports.MaxBufferError = MaxBufferError;

9
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MIT License
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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{
"name": "get-stream",
"version": "5.2.0",
"description": "Get a stream as a string, buffer, or array",
"license": "MIT",
"repository": "sindresorhus/get-stream",
"funding": "https://github.com/sponsors/sindresorhus",
"author": {
"name": "Sindre Sorhus",
"email": "sindresorhus@gmail.com",
"url": "https://sindresorhus.com"
},
"engines": {
"node": ">=8"
},
"scripts": {
"test": "xo && ava && tsd"
},
"files": [
"index.js",
"index.d.ts",
"buffer-stream.js"
],
"keywords": [
"get",
"stream",
"promise",
"concat",
"string",
"text",
"buffer",
"read",
"data",
"consume",
"readable",
"readablestream",
"array",
"object"
],
"dependencies": {
"pump": "^3.0.0"
},
"devDependencies": {
"@types/node": "^12.0.7",
"ava": "^2.0.0",
"into-stream": "^5.0.0",
"tsd": "^0.7.2",
"xo": "^0.24.0"
}
}

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# get-stream [![Build Status](https://travis-ci.com/sindresorhus/get-stream.svg?branch=master)](https://travis-ci.com/github/sindresorhus/get-stream)
> Get a stream as a string, buffer, or array
## Install
```
$ npm install get-stream
```
## Usage
```js
const fs = require('fs');
const getStream = require('get-stream');
(async () => {
const stream = fs.createReadStream('unicorn.txt');
console.log(await getStream(stream));
/*
,,))))))));,
__)))))))))))))),
\|/ -\(((((''''((((((((.
-*-==//////(('' . `)))))),
/|\ ))| o ;-. '((((( ,(,
( `| / ) ;))))' ,_))^;(~
| | | ,))((((_ _____------~~~-. %,;(;(>';'~
o_); ; )))(((` ~---~ `:: \ %%~~)(v;(`('~
; ''''```` `: `:::|\,__,%% );`'; ~
| _ ) / `:|`----' `-'
______/\/~ | / /
/~;;.____/;;' / ___--,-( `;;;/
/ // _;______;'------~~~~~ /;;/\ /
// | | / ; \;;,\
(<_ | ; /',/-----' _>
\_| ||_ //~;~~~~~~~~~
`\_| (,~~
\~\
~~
*/
})();
```
## API
The methods returns a promise that resolves when the `end` event fires on the stream, indicating that there is no more data to be read. The stream is switched to flowing mode.
### getStream(stream, options?)
Get the `stream` as a string.
#### options
Type: `object`
##### encoding
Type: `string`\
Default: `'utf8'`
[Encoding](https://nodejs.org/api/buffer.html#buffer_buffer) of the incoming stream.
##### maxBuffer
Type: `number`\
Default: `Infinity`
Maximum length of the returned string. If it exceeds this value before the stream ends, the promise will be rejected with a `getStream.MaxBufferError` error.
### getStream.buffer(stream, options?)
Get the `stream` as a buffer.
It honors the `maxBuffer` option as above, but it refers to byte length rather than string length.
### getStream.array(stream, options?)
Get the `stream` as an array of values.
It honors both the `maxBuffer` and `encoding` options. The behavior changes slightly based on the encoding chosen:
- When `encoding` is unset, it assumes an [object mode stream](https://nodesource.com/blog/understanding-object-streams/) and collects values emitted from `stream` unmodified. In this case `maxBuffer` refers to the number of items in the array (not the sum of their sizes).
- When `encoding` is set to `buffer`, it collects an array of buffers. `maxBuffer` refers to the summed byte lengths of every buffer in the array.
- When `encoding` is set to anything else, it collects an array of strings. `maxBuffer` refers to the summed character lengths of every string in the array.
## Errors
If the input stream emits an `error` event, the promise will be rejected with the error. The buffered data will be attached to the `bufferedData` property of the error.
```js
(async () => {
try {
await getStream(streamThatErrorsAtTheEnd('unicorn'));
} catch (error) {
console.log(error.bufferedData);
//=> 'unicorn'
}
})()
```
## FAQ
### How is this different from [`concat-stream`](https://github.com/maxogden/concat-stream)?
This module accepts a stream instead of being one and returns a promise instead of using a callback. The API is simpler and it only supports returning a string, buffer, or array. It doesn't have a fragile type inference. You explicitly choose what you want. And it doesn't depend on the huge `readable-stream` package.
## Related
- [get-stdin](https://github.com/sindresorhus/get-stdin) - Get stdin as a string or buffer
---
<div align="center">
<b>
<a href="https://tidelift.com/subscription/pkg/npm-get-stream?utm_source=npm-get-stream&utm_medium=referral&utm_campaign=readme">Get professional support for this package with a Tidelift subscription</a>
</b>
<br>
<sub>
Tidelift helps make open source sustainable for maintainers while giving companies<br>assurances about security, maintenance, and licensing for their dependencies.
</sub>
</div>

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
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designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
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this License, each Contributor hereby grants to You a perpetual,
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(except as stated in this section) patent license to make, have made,
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where such license applies only to those patent claims licensable
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or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
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Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
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8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
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incidental, or consequential damages of any character arising as a
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Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
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has been advised of the possibility of such damages.
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the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright 2019 ehmicky <ehmicky@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

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[![Codecov](https://img.shields.io/codecov/c/github/ehmicky/human-signals.svg?label=tested&logo=codecov)](https://codecov.io/gh/ehmicky/human-signals)
[![Travis](https://img.shields.io/badge/cross-platform-4cc61e.svg?logo=travis)](https://travis-ci.org/ehmicky/human-signals)
[![Node](https://img.shields.io/node/v/human-signals.svg?logo=node.js)](https://www.npmjs.com/package/human-signals)
[![Gitter](https://img.shields.io/gitter/room/ehmicky/human-signals.svg?logo=gitter)](https://gitter.im/ehmicky/human-signals)
[![Twitter](https://img.shields.io/badge/%E2%80%8B-twitter-4cc61e.svg?logo=twitter)](https://twitter.com/intent/follow?screen_name=ehmicky)
[![Medium](https://img.shields.io/badge/%E2%80%8B-medium-4cc61e.svg?logo=medium)](https://medium.com/@ehmicky)
Human-friendly process signals.
This is a map of known process signals with some information about each signal.
Unlike
[`os.constants.signals`](https://nodejs.org/api/os.html#os_signal_constants)
this includes:
- human-friendly [descriptions](#description)
- [default actions](#action), including whether they [can be prevented](#forced)
- whether the signal is [supported](#supported) by the current OS
# Example
```js
const { signalsByName, signalsByNumber } = require('human-signals')
console.log(signalsByName.SIGINT)
// {
// name: 'SIGINT',
// number: 2,
// description: 'User interruption with CTRL-C',
// supported: true,
// action: 'terminate',
// forced: false,
// standard: 'ansi'
// }
console.log(signalsByNumber[8])
// {
// name: 'SIGFPE',
// number: 8,
// description: 'Floating point arithmetic error',
// supported: true,
// action: 'core',
// forced: false,
// standard: 'ansi'
// }
```
# Install
```bash
npm install human-signals
```
# Usage
## signalsByName
_Type_: `object`
Object whose keys are signal [names](#name) and values are
[signal objects](#signal).
## signalsByNumber
_Type_: `object`
Object whose keys are signal [numbers](#number) and values are
[signal objects](#signal).
## signal
_Type_: `object`
Signal object with the following properties.
### name
_Type_: `string`
Standard name of the signal, for example `'SIGINT'`.
### number
_Type_: `number`
Code number of the signal, for example `2`. While most `number` are
cross-platform, some are different between different OS.
### description
_Type_: `string`
Human-friendly description for the signal, for example
`'User interruption with CTRL-C'`.
### supported
_Type_: `boolean`
Whether the current OS can handle this signal in Node.js using
[`process.on(name, handler)`](https://nodejs.org/api/process.html#process_signal_events).
The list of supported signals
[is OS-specific](https://github.com/ehmicky/cross-platform-node-guide/blob/master/docs/6_networking_ipc/signals.md#cross-platform-signals).
### action
_Type_: `string`<br>_Enum_: `'terminate'`, `'core'`, `'ignore'`, `'pause'`,
`'unpause'`
What is the default action for this signal when it is not handled.
### forced
_Type_: `boolean`
Whether the signal's default action cannot be prevented. This is `true` for
`SIGTERM`, `SIGKILL` and `SIGSTOP`.
### standard
_Type_: `string`<br>_Enum_: `'ansi'`, `'posix'`, `'bsd'`, `'systemv'`, `'other'`
Which standard defined that signal.
# Support
If you found a bug or would like a new feature, _don't hesitate_ to
[submit an issue on GitHub](../../issues).
For other questions, feel free to
[chat with us on Gitter](https://gitter.im/ehmicky/human-signals).
Everyone is welcome regardless of personal background. We enforce a
[Code of conduct](CODE_OF_CONDUCT.md) in order to promote a positive and
inclusive environment.
# Contributing
This project was made with ❤️. The simplest way to give back is by starring and
sharing it online.
If the documentation is unclear or has a typo, please click on the page's `Edit`
button (pencil icon) and suggest a correction.
If you would like to help us fix a bug or add a new feature, please check our
[guidelines](CONTRIBUTING.md). Pull requests are welcome!
<!-- Thanks go to our wonderful contributors: -->
<!-- ALL-CONTRIBUTORS-LIST:START -->
<!-- prettier-ignore -->
<table><tr><td align="center"><a href="https://twitter.com/ehmicky"><img src="https://avatars2.githubusercontent.com/u/8136211?v=4" width="100px;" alt="ehmicky"/><br /><sub><b>ehmicky</b></sub></a><br /><a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Code">💻</a> <a href="#design-ehmicky" title="Design">🎨</a> <a href="#ideas-ehmicky" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/ehmicky/human-signals/commits?author=ehmicky" title="Documentation">📖</a></td></tr></table>
<!-- ALL-CONTRIBUTORS-LIST:END -->

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{
"name": "human-signals",
"version": "1.1.1",
"main": "build/src/main.js",
"files": [
"build/src",
"!~"
],
"scripts": {
"test": "gulp test"
},
"husky": {
"hooks": {
"pre-push": "gulp check --full"
}
},
"description": "Human-friendly process signals",
"keywords": [
"signal",
"signals",
"handlers",
"error-handling",
"errors",
"interrupts",
"sigterm",
"sigint",
"irq",
"process",
"exit",
"exit-code",
"status",
"operating-system",
"es6",
"javascript",
"linux",
"macos",
"windows",
"nodejs"
],
"license": "Apache-2.0",
"homepage": "https://git.io/JeluP",
"repository": "ehmicky/human-signals",
"bugs": {
"url": "https://github.com/ehmicky/human-signals/issues"
},
"author": "ehmicky <ehmicky@gmail.com> (https://github.com/ehmicky)",
"directories": {
"lib": "src",
"test": "test"
},
"dependencies": {},
"devDependencies": {
"@ehmicky/dev-tasks": "^0.30.48",
"ajv": "^6.10.2",
"ava": "^2.4.0",
"fast-deep-equal": "^2.0.1",
"gulp": "^4.0.2",
"husky": "^3.0.9",
"test-each": "^1.7.2"
},
"engines": {
"node": ">=8.12.0"
}
}

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The ISC License
Copyright (c) 2015, Contributors
Permission to use, copy, modify, and/or distribute this software
for any purpose with or without fee is hereby granted, provided
that the above copyright notice and this permission notice
appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE
LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

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# signal-exit
[![Build Status](https://travis-ci.org/tapjs/signal-exit.png)](https://travis-ci.org/tapjs/signal-exit)
[![Coverage](https://coveralls.io/repos/tapjs/signal-exit/badge.svg?branch=master)](https://coveralls.io/r/tapjs/signal-exit?branch=master)
[![NPM version](https://img.shields.io/npm/v/signal-exit.svg)](https://www.npmjs.com/package/signal-exit)
[![Standard Version](https://img.shields.io/badge/release-standard%20version-brightgreen.svg)](https://github.com/conventional-changelog/standard-version)
When you want to fire an event no matter how a process exits:
* reaching the end of execution.
* explicitly having `process.exit(code)` called.
* having `process.kill(pid, sig)` called.
* receiving a fatal signal from outside the process
Use `signal-exit`.
```js
var onExit = require('signal-exit')
onExit(function (code, signal) {
console.log('process exited!')
})
```
## API
`var remove = onExit(function (code, signal) {}, options)`
The return value of the function is a function that will remove the
handler.
Note that the function *only* fires for signals if the signal would
cause the process to exit. That is, there are no other listeners, and
it is a fatal signal.
## Options
* `alwaysLast`: Run this handler after any other signal or exit
handlers. This causes `process.emit` to be monkeypatched.

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// Note: since nyc uses this module to output coverage, any lines
// that are in the direct sync flow of nyc's outputCoverage are
// ignored, since we can never get coverage for them.
// grab a reference to node's real process object right away
var process = global.process
const processOk = function (process) {
return process &&
typeof process === 'object' &&
typeof process.removeListener === 'function' &&
typeof process.emit === 'function' &&
typeof process.reallyExit === 'function' &&
typeof process.listeners === 'function' &&
typeof process.kill === 'function' &&
typeof process.pid === 'number' &&
typeof process.on === 'function'
}
// some kind of non-node environment, just no-op
/* istanbul ignore if */
if (!processOk(process)) {
module.exports = function () {
return function () {}
}
} else {
var assert = require('assert')
var signals = require('./signals.js')
var isWin = /^win/i.test(process.platform)
var EE = require('events')
/* istanbul ignore if */
if (typeof EE !== 'function') {
EE = EE.EventEmitter
}
var emitter
if (process.__signal_exit_emitter__) {
emitter = process.__signal_exit_emitter__
} else {
emitter = process.__signal_exit_emitter__ = new EE()
emitter.count = 0
emitter.emitted = {}
}
// Because this emitter is a global, we have to check to see if a
// previous version of this library failed to enable infinite listeners.
// I know what you're about to say. But literally everything about
// signal-exit is a compromise with evil. Get used to it.
if (!emitter.infinite) {
emitter.setMaxListeners(Infinity)
emitter.infinite = true
}
module.exports = function (cb, opts) {
/* istanbul ignore if */
if (!processOk(global.process)) {
return function () {}
}
assert.equal(typeof cb, 'function', 'a callback must be provided for exit handler')
if (loaded === false) {
load()
}
var ev = 'exit'
if (opts && opts.alwaysLast) {
ev = 'afterexit'
}
var remove = function () {
emitter.removeListener(ev, cb)
if (emitter.listeners('exit').length === 0 &&
emitter.listeners('afterexit').length === 0) {
unload()
}
}
emitter.on(ev, cb)
return remove
}
var unload = function unload () {
if (!loaded || !processOk(global.process)) {
return
}
loaded = false
signals.forEach(function (sig) {
try {
process.removeListener(sig, sigListeners[sig])
} catch (er) {}
})
process.emit = originalProcessEmit
process.reallyExit = originalProcessReallyExit
emitter.count -= 1
}
module.exports.unload = unload
var emit = function emit (event, code, signal) {
/* istanbul ignore if */
if (emitter.emitted[event]) {
return
}
emitter.emitted[event] = true
emitter.emit(event, code, signal)
}
// { <signal>: <listener fn>, ... }
var sigListeners = {}
signals.forEach(function (sig) {
sigListeners[sig] = function listener () {
/* istanbul ignore if */
if (!processOk(global.process)) {
return
}
// If there are no other listeners, an exit is coming!
// Simplest way: remove us and then re-send the signal.
// We know that this will kill the process, so we can
// safely emit now.
var listeners = process.listeners(sig)
if (listeners.length === emitter.count) {
unload()
emit('exit', null, sig)
/* istanbul ignore next */
emit('afterexit', null, sig)
/* istanbul ignore next */
if (isWin && sig === 'SIGHUP') {
// "SIGHUP" throws an `ENOSYS` error on Windows,
// so use a supported signal instead
sig = 'SIGINT'
}
/* istanbul ignore next */
process.kill(process.pid, sig)
}
}
})
module.exports.signals = function () {
return signals
}
var loaded = false
var load = function load () {
if (loaded || !processOk(global.process)) {
return
}
loaded = true
// This is the number of onSignalExit's that are in play.
// It's important so that we can count the correct number of
// listeners on signals, and don't wait for the other one to
// handle it instead of us.
emitter.count += 1
signals = signals.filter(function (sig) {
try {
process.on(sig, sigListeners[sig])
return true
} catch (er) {
return false
}
})
process.emit = processEmit
process.reallyExit = processReallyExit
}
module.exports.load = load
var originalProcessReallyExit = process.reallyExit
var processReallyExit = function processReallyExit (code) {
/* istanbul ignore if */
if (!processOk(global.process)) {
return
}
process.exitCode = code || /* istanbul ignore next */ 0
emit('exit', process.exitCode, null)
/* istanbul ignore next */
emit('afterexit', process.exitCode, null)
/* istanbul ignore next */
originalProcessReallyExit.call(process, process.exitCode)
}
var originalProcessEmit = process.emit
var processEmit = function processEmit (ev, arg) {
if (ev === 'exit' && processOk(global.process)) {
/* istanbul ignore else */
if (arg !== undefined) {
process.exitCode = arg
}
var ret = originalProcessEmit.apply(this, arguments)
/* istanbul ignore next */
emit('exit', process.exitCode, null)
/* istanbul ignore next */
emit('afterexit', process.exitCode, null)
/* istanbul ignore next */
return ret
} else {
return originalProcessEmit.apply(this, arguments)
}
}
}

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{
"name": "signal-exit",
"version": "3.0.7",
"description": "when you want to fire an event no matter how a process exits.",
"main": "index.js",
"scripts": {
"test": "tap",
"snap": "tap",
"preversion": "npm test",
"postversion": "npm publish",
"prepublishOnly": "git push origin --follow-tags"
},
"files": [
"index.js",
"signals.js"
],
"repository": {
"type": "git",
"url": "https://github.com/tapjs/signal-exit.git"
},
"keywords": [
"signal",
"exit"
],
"author": "Ben Coe <ben@npmjs.com>",
"license": "ISC",
"bugs": {
"url": "https://github.com/tapjs/signal-exit/issues"
},
"homepage": "https://github.com/tapjs/signal-exit",
"devDependencies": {
"chai": "^3.5.0",
"coveralls": "^3.1.1",
"nyc": "^15.1.0",
"standard-version": "^9.3.1",
"tap": "^15.1.1"
}
}

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// This is not the set of all possible signals.
//
// It IS, however, the set of all signals that trigger
// an exit on either Linux or BSD systems. Linux is a
// superset of the signal names supported on BSD, and
// the unknown signals just fail to register, so we can
// catch that easily enough.
//
// Don't bother with SIGKILL. It's uncatchable, which
// means that we can't fire any callbacks anyway.
//
// If a user does happen to register a handler on a non-
// fatal signal like SIGWINCH or something, and then
// exit, it'll end up firing `process.emit('exit')`, so
// the handler will be fired anyway.
//
// SIGBUS, SIGFPE, SIGSEGV and SIGILL, when not raised
// artificially, inherently leave the process in a
// state from which it is not safe to try and enter JS
// listeners.
module.exports = [
'SIGABRT',
'SIGALRM',
'SIGHUP',
'SIGINT',
'SIGTERM'
]
if (process.platform !== 'win32') {
module.exports.push(
'SIGVTALRM',
'SIGXCPU',
'SIGXFSZ',
'SIGUSR2',
'SIGTRAP',
'SIGSYS',
'SIGQUIT',
'SIGIOT'
// should detect profiler and enable/disable accordingly.
// see #21
// 'SIGPROF'
)
}
if (process.platform === 'linux') {
module.exports.push(
'SIGIO',
'SIGPOLL',
'SIGPWR',
'SIGSTKFLT',
'SIGUNUSED'
)
}

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{
"name": "execa",
"version": "3.2.0",
"description": "Process execution for humans",
"license": "MIT",
"repository": "sindresorhus/execa",
"author": {
"name": "Sindre Sorhus",
"email": "sindresorhus@gmail.com",
"url": "sindresorhus.com"
},
"engines": {
"node": "^8.12.0 || >=9.7.0"
},
"scripts": {
"test": "xo && nyc ava && tsd"
},
"files": [
"index.js",
"index.d.ts",
"lib"
],
"keywords": [
"exec",
"child",
"process",
"execute",
"fork",
"execfile",
"spawn",
"file",
"shell",
"bin",
"binary",
"binaries",
"npm",
"path",
"local"
],
"dependencies": {
"cross-spawn": "^7.0.0",
"get-stream": "^5.0.0",
"human-signals": "^1.1.1",
"is-stream": "^2.0.0",
"merge-stream": "^2.0.0",
"npm-run-path": "^4.0.0",
"onetime": "^5.1.0",
"p-finally": "^2.0.0",
"signal-exit": "^3.0.2",
"strip-final-newline": "^2.0.0"
},
"devDependencies": {
"@types/node": "^12.0.7",
"ava": "^2.1.0",
"coveralls": "^3.0.4",
"get-node": "^5.0.0",
"is-running": "^2.1.0",
"nyc": "^14.1.1",
"p-event": "^4.1.0",
"tempfile": "^3.0.0",
"tsd": "^0.7.3",
"xo": "^0.24.0"
},
"nyc": {
"exclude": [
"**/fixtures/**",
"**/test.js",
"**/test/**"
]
}
}

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<img src="media/logo.svg" width="400">
<br>
[![Build Status](https://travis-ci.org/sindresorhus/execa.svg?branch=master)](https://travis-ci.org/sindresorhus/execa) [![Coverage Status](https://coveralls.io/repos/github/sindresorhus/execa/badge.svg?branch=master)](https://coveralls.io/github/sindresorhus/execa?branch=master)
> Process execution for humans
## Why
This package improves [`child_process`](https://nodejs.org/api/child_process.html) methods with:
- Promise interface.
- [Strips the final newline](#stripfinalnewline) from the output so you don't have to do `stdout.trim()`.
- Supports [shebang](https://en.wikipedia.org/wiki/Shebang_(Unix)) binaries cross-platform.
- [Improved Windows support.](https://github.com/IndigoUnited/node-cross-spawn#why)
- Higher max buffer. 100 MB instead of 200 KB.
- [Executes locally installed binaries by name.](#preferlocal)
- [Cleans up spawned processes when the parent process dies.](#cleanup)
- [Get interleaved output](#all) from `stdout` and `stderr` similar to what is printed on the terminal. [*(Async only)*](#execasyncfile-arguments-options)
- [Can specify file and arguments as a single string without a shell](#execacommandcommand-options)
- More descriptive errors.
## Install
```
$ npm install execa
```
## Usage
```js
const execa = require('execa');
(async () => {
const {stdout} = await execa('echo', ['unicorns']);
console.log(stdout);
//=> 'unicorns'
})();
```
Additional examples:
```js
const execa = require('execa');
(async () => {
// Pipe the child process stdout to the current stdout
execa('echo', ['unicorns']).stdout.pipe(process.stdout);
// Catching an error
try {
await execa('unknown', ['command']);
} catch (error) {
console.log(error);
/*
{
message: 'Command failed with ENOENT: unknown command spawn unknown ENOENT',
errno: 'ENOENT',
code: 'ENOENT',
syscall: 'spawn unknown',
path: 'unknown',
spawnargs: ['command'],
originalMessage: 'spawn unknown ENOENT',
command: 'unknown command',
stdout: '',
stderr: '',
all: '',
failed: true,
timedOut: false,
isCanceled: false,
killed: false
}
*/
}
// Cancelling a spawned process
const subprocess = execa('node');
setTimeout(() => {
subprocess.cancel();
}, 1000);
try {
await subprocess;
} catch (error) {
console.log(subprocess.killed); // true
console.log(error.isCanceled); // true
}
})();
// Catching an error with a sync method
try {
execa.sync('unknown', ['command']);
} catch (error) {
console.log(error);
/*
{
message: 'Command failed with ENOENT: unknown command spawnSync unknown ENOENT',
errno: 'ENOENT',
code: 'ENOENT',
syscall: 'spawnSync unknown',
path: 'unknown',
spawnargs: ['command'],
originalMessage: 'spawnSync unknown ENOENT',
command: 'unknown command',
stdout: '',
stderr: '',
all: '',
failed: true,
timedOut: false,
isCanceled: false,
killed: false
}
*/
}
// Kill a process with SIGTERM, and after 2 seconds, kill it with SIGKILL
const subprocess = execa('node');
setTimeout(() => {
subprocess.kill('SIGTERM', {
forceKillAfterTimeout: 2000
});
}, 1000);
```
## API
### execa(file, arguments, [options])
Execute a file. Think of this as a mix of [`child_process.execFile()`](https://nodejs.org/api/child_process.html#child_process_child_process_execfile_file_args_options_callback) and [`child_process.spawn()`](https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options).
No escaping/quoting is needed.
Unless the [`shell`](#shell) option is used, no shell interpreter (Bash, `cmd.exe`, etc.) is used, so shell features such as variables substitution (`echo $PATH`) are not allowed.
Returns a [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess) which:
- is also a `Promise` resolving or rejecting with a [`childProcessResult`](#childProcessResult).
- exposes the following additional methods and properties.
#### kill([signal], [options])
Same as the original [`child_process#kill()`](https://nodejs.org/api/child_process.html#child_process_subprocess_kill_signal) except: if `signal` is `SIGTERM` (the default value) and the child process is not terminated after 5 seconds, force it by sending `SIGKILL`.
##### options.forceKillAfterTimeout
Type: `number | false`<br>
Default: `5000`
Milliseconds to wait for the child process to terminate before sending `SIGKILL`.
Can be disabled with `false`.
#### cancel()
Similar to [`childProcess.kill()`](https://nodejs.org/api/child_process.html#child_process_subprocess_kill_signal). This is preferred when cancelling the child process execution as the error is more descriptive and [`childProcessResult.isCanceled`](#iscanceled) is set to `true`.
#### all
Type: `ReadableStream | undefined`
Stream combining/interleaving [`stdout`](https://nodejs.org/api/child_process.html#child_process_subprocess_stdout) and [`stderr`](https://nodejs.org/api/child_process.html#child_process_subprocess_stderr).
This is `undefined` if either:
- the [`all` option](#all-2) is `false` (the default value)
- both [`stdout`](#stdout-1) and [`stderr`](#stderr-1) options are set to [`'inherit'`, `'ipc'`, `Stream` or `integer`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio)
### execa.sync(file, [arguments], [options])
Execute a file synchronously.
Returns or throws a [`childProcessResult`](#childProcessResult).
### execa.command(command, [options])
Same as [`execa()`](#execafile-arguments-options) except both file and arguments are specified in a single `command` string. For example, `execa('echo', ['unicorns'])` is the same as `execa.command('echo unicorns')`.
If the file or an argument contains spaces, they must be escaped with backslashes. This matters especially if `command` is not a constant but a variable, for example with `__dirname` or `process.cwd()`. Except for spaces, no escaping/quoting is needed.
The [`shell` option](#shell) must be used if the `command` uses shell-specific features, as opposed to being a simple `file` followed by its `arguments`.
### execa.commandSync(command, [options])
Same as [`execa.command()`](#execacommand-command-options) but synchronous.
Returns or throws a [`childProcessResult`](#childProcessResult).
### execa.node(scriptPath, [arguments], [options])
Execute a Node.js script as a child process.
Same as `execa('node', [scriptPath, ...arguments], options)` except (like [`child_process#fork()`](https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options)):
- the current Node version and options are used. This can be overridden using the [`nodePath`](#nodepath-for-node-only) and [`nodeOptions`](#nodeoptions-for-node-only) options.
- the [`shell`](#shell) option cannot be used
- an extra channel [`ipc`](https://nodejs.org/api/child_process.html#child_process_options_stdio) is passed to [`stdio`](#stdio)
### childProcessResult
Type: `object`
Result of a child process execution. On success this is a plain object. On failure this is also an `Error` instance.
The child process [fails](#failed) when:
- its [exit code](#exitcode) is not `0`
- it was [killed](#killed) with a [signal](#signal)
- [timing out](#timedout)
- [being canceled](#iscanceled)
- there's not enough memory or there are already too many child processes
#### command
Type: `string`
The file and arguments that were run.
#### exitCode
Type: `number`
The numeric exit code of the process that was run.
#### stdout
Type: `string | Buffer`
The output of the process on stdout.
#### stderr
Type: `string | Buffer`
The output of the process on stderr.
#### all
Type: `string | Buffer | undefined`
The output of the process with `stdout` and `stderr` interleaved.
This is `undefined` if either:
- the [`all` option](#all-2) is `false` (the default value)
- `execa.sync()` was used
#### failed
Type: `boolean`
Whether the process failed to run.
#### timedOut
Type: `boolean`
Whether the process timed out.
#### isCanceled
Type: `boolean`
Whether the process was canceled.
#### killed
Type: `boolean`
Whether the process was killed.
#### signal
Type: `string | undefined`
The name of the signal that was used to terminate the process. For example, `SIGFPE`.
If a signal terminated the process, this property is defined and included in the error message. Otherwise it is `undefined`.
#### signalDescription
Type: `string | undefined`
A human-friendly description of the signal that was used to terminate the process. For example, `Floating point arithmetic error`.
If a signal terminated the process, this property is defined and included in the error message. Otherwise it is `undefined`. It is also `undefined` when the signal is very uncommon which should seldomly happen.
#### originalMessage
Type: `string | undefined`
Original error message. This is `undefined` unless the child process exited due to an `error` event or a timeout.
The `message` property contains both the `originalMessage` and some additional information added by Execa.
### options
Type: `object`
#### cleanup
Type: `boolean`<br>
Default: `true`
Kill the spawned process when the parent process exits unless either:
- the spawned process is [`detached`](https://nodejs.org/api/child_process.html#child_process_options_detached)
- the parent process is terminated abruptly, for example, with `SIGKILL` as opposed to `SIGTERM` or a normal exit
#### preferLocal
Type: `boolean`<br>
Default: `false`
Prefer locally installed binaries when looking for a binary to execute.<br>
If you `$ npm install foo`, you can then `execa('foo')`.
#### localDir
Type: `string`<br>
Default: `process.cwd()`
Preferred path to find locally installed binaries in (use with `preferLocal`).
#### execPath
Type: `string`<br>
Default: `process.execPath` (current Node.js executable)
Path to the Node.js executable to use in child processes.
This can be either an absolute path or a path relative to the [`cwd` option](#cwd).
Requires [`preferLocal`](#preferlocal) to be `true`.
For example, this can be used together with [`get-node`](https://github.com/ehmicky/get-node) to run a specific Node.js version in a child process.
#### buffer
Type: `boolean`<br>
Default: `true`
Buffer the output from the spawned process. When set to `false`, you must read the output of [`stdout`](#stdout-1) and [`stderr`](#stderr-1) (or [`all`](#all) if the [`all`](#all-2) option is `true`). Otherwise the returned promise will not be resolved/rejected.
If the spawned process fails, [`error.stdout`](#stdout), [`error.stderr`](#stderr), and [`error.all`](#all) will contain the buffered data.
#### input
Type: `string | Buffer | stream.Readable`
Write some input to the `stdin` of your binary.<br>
Streams are not allowed when using the synchronous methods.
#### stdin
Type: `string | number | Stream | undefined`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### stdout
Type: `string | number | Stream | undefined`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### stderr
Type: `string | number | Stream | undefined`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### all
Type: `boolean`<br>
Default: `false`
Add an `.all` property on the [promise](#all) and the [resolved value](#all-1). The property contains the output of the process with `stdout` and `stderr` interleaved.
#### reject
Type: `boolean`<br>
Default: `true`
Setting this to `false` resolves the promise with the error instead of rejecting it.
#### stripFinalNewline
Type: `boolean`<br>
Default: `true`
Strip the final [newline character](https://en.wikipedia.org/wiki/Newline) from the output.
#### extendEnv
Type: `boolean`<br>
Default: `true`
Set to `false` if you don't want to extend the environment variables when providing the `env` property.
---
Execa also accepts the below options which are the same as the options for [`child_process#spawn()`](https://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options)/[`child_process#exec()`](https://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback)
#### cwd
Type: `string`<br>
Default: `process.cwd()`
Current working directory of the child process.
#### env
Type: `object`<br>
Default: `process.env`
Environment key-value pairs. Extends automatically from `process.env`. Set [`extendEnv`](#extendenv) to `false` if you don't want this.
#### argv0
Type: `string`
Explicitly set the value of `argv[0]` sent to the child process. This will be set to `file` if not specified.
#### stdio
Type: `string | string[]`<br>
Default: `pipe`
Child's [stdio](https://nodejs.org/api/child_process.html#child_process_options_stdio) configuration.
#### detached
Type: `boolean`
Prepare child to run independently of its parent process. Specific behavior [depends on the platform](https://nodejs.org/api/child_process.html#child_process_options_detached).
#### uid
Type: `number`
Sets the user identity of the process.
#### gid
Type: `number`
Sets the group identity of the process.
#### shell
Type: `boolean | string`<br>
Default: `false`
If `true`, runs `file` inside of a shell. Uses `/bin/sh` on UNIX and `cmd.exe` on Windows. A different shell can be specified as a string. The shell should understand the `-c` switch on UNIX or `/d /s /c` on Windows.
We recommend against using this option since it is:
- not cross-platform, encouraging shell-specific syntax.
- slower, because of the additional shell interpretation.
- unsafe, potentially allowing command injection.
#### encoding
Type: `string | null`<br>
Default: `utf8`
Specify the character encoding used to decode the `stdout` and `stderr` output. If set to `null`, then `stdout` and `stderr` will be a `Buffer` instead of a string.
#### timeout
Type: `number`<br>
Default: `0`
If timeout is greater than `0`, the parent will send the signal identified by the `killSignal` property (the default is `SIGTERM`) if the child runs longer than timeout milliseconds.
#### maxBuffer
Type: `number`<br>
Default: `100_000_000` (100 MB)
Largest amount of data in bytes allowed on `stdout` or `stderr`.
#### killSignal
Type: `string | number`<br>
Default: `SIGTERM`
Signal value to be used when the spawned process will be killed.
#### windowsVerbatimArguments
Type: `boolean`<br>
Default: `false`
If `true`, no quoting or escaping of arguments is done on Windows. Ignored on other platforms. This is set to `true` automatically when the `shell` option is `true`.
#### nodePath *(for `.node()` only)*
Type: `string`<br>
Default: [`process.execPath`](https://nodejs.org/api/process.html#process_process_execpath)
Node.js executable used to create the child process.
#### nodeOptions *(for `.node()` only)*
Type: `string[]`<br>
Default: [`process.execArgv`](https://nodejs.org/api/process.html#process_process_execargv)
List of [CLI options](https://nodejs.org/api/cli.html#cli_options) passed to the Node.js executable.
## Tips
### Save and pipe output from a child process
Let's say you want to show the output of a child process in real-time while also saving it to a variable.
```js
const execa = require('execa');
const subprocess = execa('echo', ['foo']);
subprocess.stdout.pipe(process.stdout);
(async () => {
const {stdout} = await subprocess;
console.log('child output:', stdout);
})();
```
### Redirect output to a file
```js
const execa = require('execa');
const subprocess = execa('echo', ['foo'])
subprocess.stdout.pipe(fs.createWriteStream('stdout.txt'))
```
### Redirect input from a file
```js
const execa = require('execa');
const subprocess = execa('cat')
fs.createReadStream('stdin.txt').pipe(subprocess.stdin)
```
### Execute the current package's binary
```js
const {getBinPathSync} = require('get-bin-path');
const binPath = getBinPathSync();
const subprocess = execa(binPath);
```
`execa` can be combined with [`get-bin-path`](https://github.com/ehmicky/get-bin-path) to test the current package's binary. As opposed to hard-coding the path to the binary, this validates that the `package.json` `bin` field is correctly set up.
## Related
- [gulp-execa](https://github.com/ehmicky/gulp-execa) - Gulp plugin for `execa`
## Maintainers
- [Sindre Sorhus](https://github.com/sindresorhus)
- [@ehmicky](https://github.com/ehmicky)
---
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