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#!/usr/bin/env node
/**
* @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 resolve = require( 'path' ).resolve;
var readFileSync = require( '@stdlib/fs/read-file' ).sync;
var CLI = require( '@stdlib/cli/ctor' );
var repl = require( './../lib' );
// VARIABLES //
var MSG = [
'',
'A better REPL for Node.js.',
'',
' help( alias ) Prints help text.',
' example( alias ) Runs examples.',
' alias2pkg( alias ) Converts an alias to a stdlib package name.',
' pkg2alias( pkg ) Converts a stdlib package name to an alias.',
' namespace() Lists namespace contents.',
'',
'For more info about stdlib, see the source repository:',
'',
' https://github.com/stdlib-js/stdlib',
''
].join( '\n' );
// MAIN //
/**
* Main execution sequence.
*
* @private
*/
function main() {
var flags;
var cli;
// Create a command-line interface:
cli = new CLI({
'pkg': require( './../package.json' ),
'options': require( './../etc/cli_opts.json' ),
'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), {
'encoding': 'utf8'
})
});
// Get any provided command-line options:
flags = cli.flags();
if ( flags.help || flags.version ) {
return;
}
console.log( MSG ); // eslint-disable-line no-console
repl( onStart );
/**
* Callback invoked upon starting a REPL.
*
* @private
* @param {(Error|null)} error - error object
* @param {REPL} r - REPL instance
* @returns {void}
*/
function onStart( error ) {
if ( error ) {
return cli.error( error );
}
}
}
main();