source: trip-planner-front/node_modules/npmlog/log.js@ 6a3a178

Last change on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 8.4 KB
Line 
1'use strict'
2var Progress = require('are-we-there-yet')
3var Gauge = require('gauge')
4var EE = require('events').EventEmitter
5var log = exports = module.exports = new EE()
6var util = require('util')
7
8var setBlocking = require('set-blocking')
9var consoleControl = require('console-control-strings')
10
11setBlocking(true)
12var stream = process.stderr
13Object.defineProperty(log, 'stream', {
14 set: function (newStream) {
15 stream = newStream
16 if (this.gauge) this.gauge.setWriteTo(stream, stream)
17 },
18 get: function () {
19 return stream
20 }
21})
22
23// by default, decide based on tty-ness.
24var colorEnabled
25log.useColor = function () {
26 return colorEnabled != null ? colorEnabled : stream.isTTY
27}
28
29log.enableColor = function () {
30 colorEnabled = true
31 this.gauge.setTheme({hasColor: colorEnabled, hasUnicode: unicodeEnabled})
32}
33log.disableColor = function () {
34 colorEnabled = false
35 this.gauge.setTheme({hasColor: colorEnabled, hasUnicode: unicodeEnabled})
36}
37
38// default level
39log.level = 'info'
40
41log.gauge = new Gauge(stream, {
42 enabled: false, // no progress bars unless asked
43 theme: {hasColor: log.useColor()},
44 template: [
45 {type: 'progressbar', length: 20},
46 {type: 'activityIndicator', kerning: 1, length: 1},
47 {type: 'section', default: ''},
48 ':',
49 {type: 'logline', kerning: 1, default: ''}
50 ]
51})
52
53log.tracker = new Progress.TrackerGroup()
54
55// we track this separately as we may need to temporarily disable the
56// display of the status bar for our own loggy purposes.
57log.progressEnabled = log.gauge.isEnabled()
58
59var unicodeEnabled
60
61log.enableUnicode = function () {
62 unicodeEnabled = true
63 this.gauge.setTheme({hasColor: this.useColor(), hasUnicode: unicodeEnabled})
64}
65
66log.disableUnicode = function () {
67 unicodeEnabled = false
68 this.gauge.setTheme({hasColor: this.useColor(), hasUnicode: unicodeEnabled})
69}
70
71log.setGaugeThemeset = function (themes) {
72 this.gauge.setThemeset(themes)
73}
74
75log.setGaugeTemplate = function (template) {
76 this.gauge.setTemplate(template)
77}
78
79log.enableProgress = function () {
80 if (this.progressEnabled) return
81 this.progressEnabled = true
82 this.tracker.on('change', this.showProgress)
83 if (this._pause) return
84 this.gauge.enable()
85}
86
87log.disableProgress = function () {
88 if (!this.progressEnabled) return
89 this.progressEnabled = false
90 this.tracker.removeListener('change', this.showProgress)
91 this.gauge.disable()
92}
93
94var trackerConstructors = ['newGroup', 'newItem', 'newStream']
95
96var mixinLog = function (tracker) {
97 // mixin the public methods from log into the tracker
98 // (except: conflicts and one's we handle specially)
99 Object.keys(log).forEach(function (P) {
100 if (P[0] === '_') return
101 if (trackerConstructors.filter(function (C) { return C === P }).length) return
102 if (tracker[P]) return
103 if (typeof log[P] !== 'function') return
104 var func = log[P]
105 tracker[P] = function () {
106 return func.apply(log, arguments)
107 }
108 })
109 // if the new tracker is a group, make sure any subtrackers get
110 // mixed in too
111 if (tracker instanceof Progress.TrackerGroup) {
112 trackerConstructors.forEach(function (C) {
113 var func = tracker[C]
114 tracker[C] = function () { return mixinLog(func.apply(tracker, arguments)) }
115 })
116 }
117 return tracker
118}
119
120// Add tracker constructors to the top level log object
121trackerConstructors.forEach(function (C) {
122 log[C] = function () { return mixinLog(this.tracker[C].apply(this.tracker, arguments)) }
123})
124
125log.clearProgress = function (cb) {
126 if (!this.progressEnabled) return cb && process.nextTick(cb)
127 this.gauge.hide(cb)
128}
129
130log.showProgress = function (name, completed) {
131 if (!this.progressEnabled) return
132 var values = {}
133 if (name) values.section = name
134 var last = log.record[log.record.length - 1]
135 if (last) {
136 values.subsection = last.prefix
137 var disp = log.disp[last.level] || last.level
138 var logline = this._format(disp, log.style[last.level])
139 if (last.prefix) logline += ' ' + this._format(last.prefix, this.prefixStyle)
140 logline += ' ' + last.message.split(/\r?\n/)[0]
141 values.logline = logline
142 }
143 values.completed = completed || this.tracker.completed()
144 this.gauge.show(values)
145}.bind(log) // bind for use in tracker's on-change listener
146
147// temporarily stop emitting, but don't drop
148log.pause = function () {
149 this._paused = true
150 if (this.progressEnabled) this.gauge.disable()
151}
152
153log.resume = function () {
154 if (!this._paused) return
155 this._paused = false
156
157 var b = this._buffer
158 this._buffer = []
159 b.forEach(function (m) {
160 this.emitLog(m)
161 }, this)
162 if (this.progressEnabled) this.gauge.enable()
163}
164
165log._buffer = []
166
167var id = 0
168log.record = []
169log.maxRecordSize = 10000
170log.log = function (lvl, prefix, message) {
171 var l = this.levels[lvl]
172 if (l === undefined) {
173 return this.emit('error', new Error(util.format(
174 'Undefined log level: %j', lvl)))
175 }
176
177 var a = new Array(arguments.length - 2)
178 var stack = null
179 for (var i = 2; i < arguments.length; i++) {
180 var arg = a[i - 2] = arguments[i]
181
182 // resolve stack traces to a plain string.
183 if (typeof arg === 'object' && arg &&
184 (arg instanceof Error) && arg.stack) {
185
186 Object.defineProperty(arg, 'stack', {
187 value: stack = arg.stack + '',
188 enumerable: true,
189 writable: true
190 })
191 }
192 }
193 if (stack) a.unshift(stack + '\n')
194 message = util.format.apply(util, a)
195
196 var m = { id: id++,
197 level: lvl,
198 prefix: String(prefix || ''),
199 message: message,
200 messageRaw: a }
201
202 this.emit('log', m)
203 this.emit('log.' + lvl, m)
204 if (m.prefix) this.emit(m.prefix, m)
205
206 this.record.push(m)
207 var mrs = this.maxRecordSize
208 var n = this.record.length - mrs
209 if (n > mrs / 10) {
210 var newSize = Math.floor(mrs * 0.9)
211 this.record = this.record.slice(-1 * newSize)
212 }
213
214 this.emitLog(m)
215}.bind(log)
216
217log.emitLog = function (m) {
218 if (this._paused) {
219 this._buffer.push(m)
220 return
221 }
222 if (this.progressEnabled) this.gauge.pulse(m.prefix)
223 var l = this.levels[m.level]
224 if (l === undefined) return
225 if (l < this.levels[this.level]) return
226 if (l > 0 && !isFinite(l)) return
227
228 // If 'disp' is null or undefined, use the lvl as a default
229 // Allows: '', 0 as valid disp
230 var disp = log.disp[m.level] != null ? log.disp[m.level] : m.level
231 this.clearProgress()
232 m.message.split(/\r?\n/).forEach(function (line) {
233 if (this.heading) {
234 this.write(this.heading, this.headingStyle)
235 this.write(' ')
236 }
237 this.write(disp, log.style[m.level])
238 var p = m.prefix || ''
239 if (p) this.write(' ')
240 this.write(p, this.prefixStyle)
241 this.write(' ' + line + '\n')
242 }, this)
243 this.showProgress()
244}
245
246log._format = function (msg, style) {
247 if (!stream) return
248
249 var output = ''
250 if (this.useColor()) {
251 style = style || {}
252 var settings = []
253 if (style.fg) settings.push(style.fg)
254 if (style.bg) settings.push('bg' + style.bg[0].toUpperCase() + style.bg.slice(1))
255 if (style.bold) settings.push('bold')
256 if (style.underline) settings.push('underline')
257 if (style.inverse) settings.push('inverse')
258 if (settings.length) output += consoleControl.color(settings)
259 if (style.beep) output += consoleControl.beep()
260 }
261 output += msg
262 if (this.useColor()) {
263 output += consoleControl.color('reset')
264 }
265 return output
266}
267
268log.write = function (msg, style) {
269 if (!stream) return
270
271 stream.write(this._format(msg, style))
272}
273
274log.addLevel = function (lvl, n, style, disp) {
275 // If 'disp' is null or undefined, use the lvl as a default
276 if (disp == null) disp = lvl
277 this.levels[lvl] = n
278 this.style[lvl] = style
279 if (!this[lvl]) {
280 this[lvl] = function () {
281 var a = new Array(arguments.length + 1)
282 a[0] = lvl
283 for (var i = 0; i < arguments.length; i++) {
284 a[i + 1] = arguments[i]
285 }
286 return this.log.apply(this, a)
287 }.bind(this)
288 }
289 this.disp[lvl] = disp
290}
291
292log.prefixStyle = { fg: 'magenta' }
293log.headingStyle = { fg: 'white', bg: 'black' }
294
295log.style = {}
296log.levels = {}
297log.disp = {}
298log.addLevel('silly', -Infinity, { inverse: true }, 'sill')
299log.addLevel('verbose', 1000, { fg: 'blue', bg: 'black' }, 'verb')
300log.addLevel('info', 2000, { fg: 'green' })
301log.addLevel('timing', 2500, { fg: 'green', bg: 'black' })
302log.addLevel('http', 3000, { fg: 'green', bg: 'black' })
303log.addLevel('notice', 3500, { fg: 'blue', bg: 'black' })
304log.addLevel('warn', 4000, { fg: 'black', bg: 'yellow' }, 'WARN')
305log.addLevel('error', 5000, { fg: 'red', bg: 'black' }, 'ERR!')
306log.addLevel('silent', Infinity)
307
308// allow 'error' prefix
309log.on('error', function () {})
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