Press n or j to go to the next uncovered block, b, p or k for the previous block.
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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 r = require( 'repl' );
var isFunction = require( '@stdlib/assert/is-function' );
var format = require( '@stdlib/string/format' );
var validate = require( './validate.js' );
var defaults = require( './defaults.js' );
var extendContext = require( './context.js' );
// MAIN //
/**
* Starts a REPL environment.
*
* @param {Options} [options] - REPL options
* @param {Callback} clbk - callback to invoke upon starting a REPL
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @throws {TypeError} callback argument must be a function
*
* @example
* repl( onStart );
*
* function onStart( error, server ) {
* if ( error ) {
* throw error;
* }
* server.close();
* }
*/
function repl( options, clbk ) {
var server;
var opts;
var err;
var cb;
opts = defaults();
if ( arguments.length === 1 ) {
cb = options;
} else {
err = validate( opts, options );
if ( err ) {
throw err;
}
cb = clbk;
}
if ( !isFunction( cb ) ) {
throw new TypeError( format( 'invalid argument. Callback argument must be a function. Value: `%s`.', cb ) );
}
// Start the REPL server:
server = r.start( opts );
// Extend a REPL context:
extendContext( server );
// Don't release the zalgo!
setTimeout( onTimeout, 0 );
/**
* Callback invoked during a subsequent tick.
*
* @private
*/
function onTimeout() {
cb( null, server );
}
}
// EXPORTS //
module.exports = repl;
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