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exit_code.js
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78 lines (62 loc) · 1.9 KB
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/**
* @license Apache-2.0
*
* Copyright (c) 2019 The Stdlib Authors.
*
* 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.
*/
'use strict';
// MODULES //
var NODE_VERSION = require( '@stdlib/process/node-version' );
// VARIABLES //
var TIMEOUT = 10; // ms
// MAIN //
/**
* Sets the process exit code.
*
* @private
* @param {Object} proc - process object
* @param {NonNegativeInteger} code - exit code
* @returns {void}
*/
function exitCode( proc, code ) {
var v;
// Handle old Node.js versions lacking `process.exitCode` support...
v = NODE_VERSION.split( '.' );
v[ 0 ] = parseInt( v[ 0 ], 10 );
v[ 1 ] = parseInt( v[ 1 ], 10 );
// Case: >0.x.x
if ( v[ 0 ] > 0 ) {
proc.exitCode = code;
return;
}
// Case: >0.10.x
if ( v[ 1 ] > 10 ) {
proc.exitCode = code;
return;
}
// Case: <= 0.10.x
proc.exitCode = code; // NOTE: assigning this property should have no operational effect in older Node.js versions
// No choice but to forcefully exit during a subsequent turn of the event loop (note: the timeout duration is arbitrary; the main idea is to hopefully allow the event loop queue to drain before exiting the process, including the flushing of stdio streams which can be non-blocking/asynchronous)...
setTimeout( onTimeout, TIMEOUT );
/**
* Callback invoked during a subsequent turn of the event loop.
*
* @private
*/
function onTimeout() {
proc.exit( code );
}
}
// EXPORTS //
module.exports = exitCode;