corrade-nucleus-nucleons – Blame information for rev 36

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36 office 1  
2 /**
3 * Module dependencies.
4 */
5  
6 var tty = require('tty');
7 var util = require('util');
8  
9 /**
10 * This is the Node.js implementation of `debug()`.
11 *
12 * Expose `debug()` as the module.
13 */
14  
15 exports = module.exports = require('./debug');
16 exports.log = log;
17 exports.formatArgs = formatArgs;
18 exports.save = save;
19 exports.load = load;
20 exports.useColors = useColors;
21  
22 /**
23 * Colors.
24 */
25  
26 exports.colors = [6, 2, 3, 4, 5, 1];
27  
28 /**
29 * The file descriptor to write the `debug()` calls to.
30 * Set the `DEBUG_FD` env variable to override with another value. i.e.:
31 *
32 * $ DEBUG_FD=3 node script.js 3>debug.log
33 */
34  
35 var fd = parseInt(process.env.DEBUG_FD, 10) || 2;
36 var stream = 1 === fd ? process.stdout :
37 2 === fd ? process.stderr :
38 createWritableStdioStream(fd);
39  
40 /**
41 * Is stdout a TTY? Colored output is enabled when `true`.
42 */
43  
44 function useColors() {
45 var debugColors = (process.env.DEBUG_COLORS || '').trim().toLowerCase();
46 if (0 === debugColors.length) {
47 return tty.isatty(fd);
48 } else {
49 return '0' !== debugColors
50 && 'no' !== debugColors
51 && 'false' !== debugColors
52 && 'disabled' !== debugColors;
53 }
54 }
55  
56 /**
57 * Map %o to `util.inspect()`, since Node doesn't do that out of the box.
58 */
59  
60 var inspect = (4 === util.inspect.length ?
61 // node <= 0.8.x
62 function (v, colors) {
63 return util.inspect(v, void 0, void 0, colors);
64 } :
65 // node > 0.8.x
66 function (v, colors) {
67 return util.inspect(v, { colors: colors });
68 }
69 );
70  
71 exports.formatters.o = function(v) {
72 return inspect(v, this.useColors)
73 .replace(/\s*\n\s*/g, ' ');
74 };
75  
76 /**
77 * Adds ANSI color escape codes if enabled.
78 *
79 * @api public
80 */
81  
82 function formatArgs() {
83 var args = arguments;
84 var useColors = this.useColors;
85 var name = this.namespace;
86  
87 if (useColors) {
88 var c = this.color;
89  
90 args[0] = ' \u001b[3' + c + ';1m' + name + ' '
91 + '\u001b[0m'
92 + args[0] + '\u001b[3' + c + 'm'
93 + ' +' + exports.humanize(this.diff) + '\u001b[0m';
94 } else {
95 args[0] = new Date().toUTCString()
96 + ' ' + name + ' ' + args[0];
97 }
98 return args;
99 }
100  
101 /**
102 * Invokes `console.error()` with the specified arguments.
103 */
104  
105 function log() {
106 return stream.write(util.format.apply(this, arguments) + '\n');
107 }
108  
109 /**
110 * Save `namespaces`.
111 *
112 * @param {String} namespaces
113 * @api private
114 */
115  
116 function save(namespaces) {
117 if (null == namespaces) {
118 // If you set a process.env field to null or undefined, it gets cast to the
119 // string 'null' or 'undefined'. Just delete instead.
120 delete process.env.DEBUG;
121 } else {
122 process.env.DEBUG = namespaces;
123 }
124 }
125  
126 /**
127 * Load `namespaces`.
128 *
129 * @return {String} returns the previously persisted debug modes
130 * @api private
131 */
132  
133 function load() {
134 return process.env.DEBUG;
135 }
136  
137 /**
138 * Copied from `node/src/node.js`.
139 *
140 * XXX: It's lame that node doesn't expose this API out-of-the-box. It also
141 * relies on the undocumented `tty_wrap.guessHandleType()` which is also lame.
142 */
143  
144 function createWritableStdioStream (fd) {
145 var stream;
146 var tty_wrap = process.binding('tty_wrap');
147  
148 // Note stream._type is used for test-module-load-list.js
149  
150 switch (tty_wrap.guessHandleType(fd)) {
151 case 'TTY':
152 stream = new tty.WriteStream(fd);
153 stream._type = 'tty';
154  
155 // Hack to have stream not keep the event loop alive.
156 // See https://github.com/joyent/node/issues/1726
157 if (stream._handle && stream._handle.unref) {
158 stream._handle.unref();
159 }
160 break;
161  
162 case 'FILE':
163 var fs = require('fs');
164 stream = new fs.SyncWriteStream(fd, { autoClose: false });
165 stream._type = 'fs';
166 break;
167  
168 case 'PIPE':
169 case 'TCP':
170 var net = require('net');
171 stream = new net.Socket({
172 fd: fd,
173 readable: false,
174 writable: true
175 });
176  
177 // FIXME Should probably have an option in net.Socket to create a
178 // stream from an existing fd which is writable only. But for now
179 // we'll just add this hack and set the `readable` member to false.
180 // Test: ./node test/fixtures/echo.js < /etc/passwd
181 stream.readable = false;
182 stream.read = null;
183 stream._type = 'pipe';
184  
185 // FIXME Hack to have stream not keep the event loop alive.
186 // See https://github.com/joyent/node/issues/1726
187 if (stream._handle && stream._handle.unref) {
188 stream._handle.unref();
189 }
190 break;
191  
192 default:
193 // Probably an error on in uv_guess_handle()
194 throw new Error('Implement me. Unknown stream file type!');
195 }
196  
197 // For supporting legacy API we put the FD here.
198 stream.fd = fd;
199  
200 stream._isStdio = true;
201  
202 return stream;
203 }
204  
205 /**
206 * Enable namespaces listed in `process.env.DEBUG` initially.
207 */
208  
209 exports.enable(load());