codekingpro/portable-devtools

1#!/usr/bin/env node
2
3/*!
4 * Module dependencies.
5 */
6
7var qrcode = require('../lib/main'),
8    path = require('path'),
9    fs = require('fs');
10
11/*!
12 * Parse the process name
13 */
14
15var name = process.argv[1].replace(/^.*[\\\/]/, '').replace('.js', '');
16
17/*!
18 * Parse the input
19 */
20
21if (process.stdin.isTTY) {
22    // called with input as argument, e.g.:
23    // ./qrcode-terminal.js "INPUT"
24
25    var input = process.argv[2];
26    handleInput(input);
27} else {
28    // called with piped input, e.g.:
29    // echo "INPUT" | ./qrcode-terminal.js
30
31    var readline = require('readline');
32
33    var interface = readline.createInterface({
34        input: process.stdin,
35        output: process.stdout,
36        terminal: false
37    });
38
39    interface.on('line', function(line) {
40        handleInput(line);
41    });
42}
43
44/*!
45 * Process the input
46 */
47
48function handleInput(input) {
49
50    /*!
51     * Display help
52     */
53
54    if (!input || input === '-h' || input === '--help') {
55        help();
56        process.exit();
57    }
58
59    /*!
60     * Display version
61     */
62
63    if (input === '-v' || input === '--version') {
64        version();
65        process.exit();
66    }
67
68    /*!
69     * Render the QR Code
70     */
71
72    qrcode.generate(input);
73}
74
75/*!
76 * Helper functions
77 */
78
79function help() {
80    console.log([
81        '',
82        'Usage: ' + name + ' <message>',
83        '',
84        'Options:',
85        '  -h, --help           output usage information',
86        '  -v, --version        output version number',
87        '',
88        'Examples:',
89        '',
90        '  $ ' + name + ' hello',
91        '  $ ' + name + ' "hello world"',
92        ''
93    ].join('\n'));
94}
95
96function version() {
97    var packagePath = path.join(__dirname, '..', 'package.json'),
98        packageJSON = JSON.parse(fs.readFileSync(packagePath), 'utf8');
99
100    console.log(packageJSON.version);
101}
102