cli (1903B)
1 #!/usr/bin/env node 2 3 /** 4 * @license Apache-2.0 5 * 6 * Copyright (c) 2018 The Stdlib Authors. 7 * 8 * Licensed under the Apache License, Version 2.0 (the "License"); 9 * you may not use this file except in compliance with the License. 10 * You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 'use strict'; 22 23 // MODULES // 24 25 var resolve = require( 'path' ).resolve; 26 var readFileSync = require( '@stdlib/fs/read-file' ).sync; 27 var CLI = require( '@stdlib/cli/ctor' ); 28 var cwd = require( '@stdlib/process/cwd' ); 29 var readDir = require( './../lib' ); 30 31 32 // MAIN // 33 34 /** 35 * Main execution sequence. 36 * 37 * @private 38 * @returns {void} 39 */ 40 function main() { 41 var flags; 42 var dpath; 43 var args; 44 var cli; 45 46 // Create a command-line interface: 47 cli = new CLI({ 48 'pkg': require( './../package.json' ), 49 'options': require( './../etc/cli_opts.json' ), 50 'help': readFileSync( resolve( __dirname, '..', 'docs', 'usage.txt' ), { 51 'encoding': 'utf8' 52 }) 53 }); 54 55 // Get any provided command-line options: 56 flags = cli.flags(); 57 if ( flags.help || flags.version ) { 58 return; 59 } 60 61 // Get any provided command-line arguments: 62 args = cli.args(); 63 64 dpath = resolve( cwd(), args[ 0 ] ); 65 readDir( dpath, onRead ); 66 67 /** 68 * Callback invoked upon reading the contents of a directory. 69 * 70 * @private 71 * @param {(Error|null)} error - error object 72 * @param {string[]} data - directory contents 73 * @returns {void} 74 */ 75 function onRead( error, data ) { 76 if ( error ) { 77 return cli.error( error ); 78 } 79 console.log( data.join( '\n' ) ); // eslint-disable-line no-console 80 } 81 } 82 83 main();