cli (2071B)
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 stdin = require( '@stdlib/process/read-stdin' ); 29 var stdinStream = require( '@stdlib/streams/node/stdin' ); 30 var percentEncode = require( './../lib' ); 31 32 33 // MAIN // 34 35 /** 36 * Main execution sequence. 37 * 38 * @private 39 * @returns {void} 40 */ 41 function main() { 42 var flags; 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 // Check if we are receiving data from `stdin`... 65 if ( !stdinStream.isTTY ) { 66 return stdin( onRead ); 67 } 68 console.log( percentEncode( args[ 0 ] ) ); // eslint-disable-line no-console 69 70 /** 71 * Callback invoked upon reading from `stdin`. 72 * 73 * @private 74 * @param {(Error|null)} error - error object 75 * @param {Buffer} data - data 76 * @returns {void} 77 */ 78 function onRead( error, data ) { 79 if ( error ) { 80 return cli.error( error ); 81 } 82 console.log( percentEncode( data.toString() ) ); // eslint-disable-line no-console 83 } 84 } 85 86 main();