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'use strict';
const prefix = `(${process.release.name}:${process.pid}) `;
const { ERR_INVALID_ARG_TYPE } = require('internal/errors').codes;
exports.setup = setupProcessWarnings;
let options;
function lazyOption(name) {
if (!options) {
options = require('internal/options');
}
return options.getOptionValue(name);
}
var cachedFd;
var acquiringFd = false;
function nop() {}
// Lazily loaded
var fs = null;
function writeOut(message) {
if (console && typeof console.error === 'function')
return console.error(message);
process._rawDebug(message);
}
function onClose(fd) {
return () => {
if (fs === null) fs = require('fs');
fs.close(fd, nop);
};
}
function onOpen(cb) {
return (err, fd) => {
acquiringFd = false;
if (fd !== undefined) {
cachedFd = fd;
process.on('exit', onClose(fd));
}
cb(err, fd);
process.emit('_node_warning_fd_acquired', err, fd);
};
}
function onAcquired(message) {
// make a best effort attempt at writing the message
// to the fd. Errors are ignored at this point.
return (err, fd) => {
if (err)
return writeOut(message);
if (fs === null) fs = require('fs');
fs.appendFile(fd, `${message}\n`, nop);
};
}
function acquireFd(warningFile, cb) {
if (cachedFd === undefined && !acquiringFd) {
acquiringFd = true;
if (fs === null) fs = require('fs');
fs.open(warningFile, 'a', onOpen(cb));
} else if (cachedFd !== undefined && !acquiringFd) {
cb(null, cachedFd);
} else {
process.once('_node_warning_fd_acquired', cb);
}
}
function output(message) {
const warningFile = lazyOption('--redirect-warnings');
if (warningFile) {
acquireFd(warningFile, onAcquired(message));
return;
}
writeOut(message);
}
function doEmitWarning(warning) {
return () => {
process.emit('warning', warning);
};
}
function setupProcessWarnings() {
if (!process.noProcessWarnings && process.env.NODE_NO_WARNINGS !== '1') {
process.on('warning', (warning) => {
if (!(warning instanceof Error)) return;
const isDeprecation = warning.name === 'DeprecationWarning';
if (isDeprecation && process.noDeprecation) return;
const trace = process.traceProcessWarnings ||
(isDeprecation && process.traceDeprecation);
var msg = prefix;
if (warning.code)
msg += `[${warning.code}] `;
if (trace && warning.stack) {
msg += `${warning.stack}`;
} else {
const toString =
typeof warning.toString === 'function' ?
warning.toString : Error.prototype.toString;
msg += `${toString.apply(warning)}`;
}
if (typeof warning.detail === 'string') {
msg += `\n${warning.detail}`;
}
output(msg);
});
}
// process.emitWarning(error)
// process.emitWarning(str[, type[, code]][, ctor])
// process.emitWarning(str[, options])
process.emitWarning = (warning, type, code, ctor, now) => {
let detail;
if (type !== null && typeof type === 'object' && !Array.isArray(type)) {
ctor = type.ctor;
code = type.code;
if (typeof type.detail === 'string')
detail = type.detail;
type = type.type || 'Warning';
} else if (typeof type === 'function') {
ctor = type;
code = undefined;
type = 'Warning';
}
if (type !== undefined && typeof type !== 'string') {
throw new ERR_INVALID_ARG_TYPE('type', 'string', type);
}
if (typeof code === 'function') {
ctor = code;
code = undefined;
} else if (code !== undefined && typeof code !== 'string') {
throw new ERR_INVALID_ARG_TYPE('code', 'string', code);
}
if (typeof warning === 'string') {
// Improve error creation performance by skipping the error frames.
// They are added in the `captureStackTrace()` function below.
const tmpStackLimit = Error.stackTraceLimit;
Error.stackTraceLimit = 0;
// eslint-disable-next-line no-restricted-syntax
warning = new Error(warning);
Error.stackTraceLimit = tmpStackLimit;
warning.name = String(type || 'Warning');
if (code !== undefined) warning.code = code;
if (detail !== undefined) warning.detail = detail;
Error.captureStackTrace(warning, ctor || process.emitWarning);
} else if (!(warning instanceof Error)) {
throw new ERR_INVALID_ARG_TYPE('warning', ['Error', 'string'], warning);
}
if (warning.name === 'DeprecationWarning') {
if (process.noDeprecation)
return;
if (process.throwDeprecation)
throw warning;
}
if (now) process.emit('warning', warning);
else process.nextTick(doEmitWarning(warning));
};
}
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