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* @license Apache-2.0
*
* Copyright (c) 2018 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 objectKeys = require( '@stdlib/utils/keys' );
var ENV = require( '@stdlib/process/env' );
// FUNCTIONS //
/**
* Copies `process.env`.
*
* ## Notes
*
* - This implementation accommodates `process.env` on older Node.js versions (<=v0.10.x), where `process.env` was object-like, but would show unexpected behavior when attempting to get own property descriptors.
*
* @private
* @returns {Object} copy of `process.env`
*/
function copy() {
var keys;
var env;
var out;
var i;
keys = objectKeys( ENV );
out = {};
for ( i = 0; i < keys.length; i++ ) {
env = keys[ i ];
out[ env ] = ENV[ env ];
}
return out;
}
// MAIN //
/**
* Returns worker environment variables.
*
* @private
* @param {Options} opts - options
* @param {string} opts.cmd - executable file/command
* @param {boolean} opts.ordered - boolean indicating whether to preserve order of script output
* @param {(NonNegativeInteger|null)} opts.uid - process user identity
* @param {(NonNegativeInteger|null)} opts.gid - process group identity
* @param {string} opts.encoding - `stdio` encoding
* @param {NonNegativeInteger} opts.maxBuffer - max child process `stdio` buffer size
* @returns {Object} environment variables
*/
function env( opts ) {
var out = copy();
out.WORKER_CMD = opts.cmd;
out.WORKER_ENCODING = opts.encoding;
out.WORKER_MAX_BUFFER = opts.maxBuffer;
if ( opts.ordered ) {
out.WORKER_ORDERED = '1';
}
if ( opts.uid ) {
out.WORKER_UID = opts.uid;
}
if ( opts.gid ) {
out.WORKER_GID = opts.gid;
}
return out;
}
// EXPORTS //
module.exports = env;
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