--- /dev/null
+'use strict'
+var Progress = require('are-we-there-yet')
+var Gauge = require('gauge')
+var EE = require('events').EventEmitter
+var log = exports = module.exports = new EE
+var util = require('util')
+
+var ansi = require('ansi')
+log.cursor = ansi(process.stderr)
+log.stream = process.stderr
+
+// by default, let ansi decide based on tty-ness.
+var colorEnabled = undefined
+log.enableColor = function () {
+ colorEnabled = true
+ this.cursor.enabled = true
+}
+log.disableColor = function () {
+ colorEnabled = false
+ this.cursor.enabled = false
+}
+
+// default level
+log.level = 'info'
+
+log.gauge = new Gauge(log.cursor)
+log.tracker = new Progress.TrackerGroup()
+
+// no progress bars unless asked
+log.progressEnabled = false
+
+var gaugeTheme = undefined
+
+log.enableUnicode = function () {
+ gaugeTheme = Gauge.unicode
+ log.gauge.setTheme(gaugeTheme)
+}
+
+log.disableUnicode = function () {
+ gaugeTheme = Gauge.ascii
+ log.gauge.setTheme(gaugeTheme)
+}
+
+var gaugeTemplate = undefined
+log.setGaugeTemplate = function (template) {
+ gaugeTemplate = template
+ log.gauge.setTemplate(gaugeTemplate)
+}
+
+log.enableProgress = function () {
+ if (this.progressEnabled) return
+ this.progressEnabled = true
+ if (this._pause) return
+ this.tracker.on('change', this.showProgress)
+ this.gauge.enable()
+ this.showProgress()
+}
+
+log.disableProgress = function () {
+ if (!this.progressEnabled) return
+ this.clearProgress()
+ this.progressEnabled = false
+ this.tracker.removeListener('change', this.showProgress)
+ this.gauge.disable()
+}
+
+var trackerConstructors = ['newGroup', 'newItem', 'newStream']
+
+var mixinLog = function (tracker) {
+ // mixin the public methods from log into the tracker
+ // (except: conflicts and one's we handle specially)
+ Object.keys(log).forEach(function (P) {
+ if (P[0] === '_') return
+ if (trackerConstructors.filter(function (C) { return C === P }).length) return
+ if (tracker[P]) return
+ if (typeof log[P] !== 'function') return
+ var func = log[P]
+ tracker[P] = function () {
+ return func.apply(log, arguments)
+ }
+ })
+ // if the new tracker is a group, make sure any subtrackers get
+ // mixed in too
+ if (tracker instanceof Progress.TrackerGroup) {
+ trackerConstructors.forEach(function (C) {
+ var func = tracker[C]
+ tracker[C] = function () { return mixinLog(func.apply(tracker, arguments)) }
+ })
+ }
+ return tracker
+}
+
+// Add tracker constructors to the top level log object
+trackerConstructors.forEach(function (C) {
+ log[C] = function () { return mixinLog(this.tracker[C].apply(this.tracker, arguments)) }
+})
+
+log.clearProgress = function () {
+ if (!this.progressEnabled) return
+ this.gauge.hide()
+}
+
+log.showProgress = function (name, completed) {
+ if (!this.progressEnabled) return
+ if (completed == null) completed = this.tracker.completed()
+ this.gauge.show(name, completed)
+}.bind(log) // bind for use in tracker's on-change listener
+
+// temporarily stop emitting, but don't drop
+log.pause = function () {
+ this._paused = true
+}
+
+log.resume = function () {
+ if (!this._paused) return
+ this._paused = false
+
+ var b = this._buffer
+ this._buffer = []
+ b.forEach(function (m) {
+ this.emitLog(m)
+ }, this)
+ if (this.progressEnabled) this.enableProgress()
+}
+
+log._buffer = []
+
+var id = 0
+log.record = []
+log.maxRecordSize = 10000
+log.log = function (lvl, prefix, message) {
+ var l = this.levels[lvl]
+ if (l === undefined) {
+ return this.emit('error', new Error(util.format(
+ 'Undefined log level: %j', lvl)))
+ }
+
+ var a = new Array(arguments.length - 2)
+ var stack = null
+ for (var i = 2; i < arguments.length; i ++) {
+ var arg = a[i-2] = arguments[i]
+
+ // resolve stack traces to a plain string.
+ if (typeof arg === 'object' && arg &&
+ (arg instanceof Error) && arg.stack) {
+ arg.stack = stack = arg.stack + ''
+ }
+ }
+ if (stack) a.unshift(stack + '\n')
+ message = util.format.apply(util, a)
+
+ var m = { id: id++,
+ level: lvl,
+ prefix: String(prefix || ''),
+ message: message,
+ messageRaw: a }
+
+ this.emit('log', m)
+ this.emit('log.' + lvl, m)
+ if (m.prefix) this.emit(m.prefix, m)
+
+ this.record.push(m)
+ var mrs = this.maxRecordSize
+ var n = this.record.length - mrs
+ if (n > mrs / 10) {
+ var newSize = Math.floor(mrs * 0.9)
+ this.record = this.record.slice(-1 * newSize)
+ }
+
+ this.emitLog(m)
+}.bind(log)
+
+log.emitLog = function (m) {
+ if (this._paused) {
+ this._buffer.push(m)
+ return
+ }
+ if (this.progressEnabled) this.gauge.pulse(m.prefix)
+ var l = this.levels[m.level]
+ if (l === undefined) return
+ if (l < this.levels[this.level]) return
+ if (l > 0 && !isFinite(l)) return
+
+ var style = log.style[m.level]
+ var disp = log.disp[m.level] || m.level
+ this.clearProgress()
+ m.message.split(/\r?\n/).forEach(function (line) {
+ if (this.heading) {
+ this.write(this.heading, this.headingStyle)
+ this.write(' ')
+ }
+ this.write(disp, log.style[m.level])
+ var p = m.prefix || ''
+ if (p) this.write(' ')
+ this.write(p, this.prefixStyle)
+ this.write(' ' + line + '\n')
+ }, this)
+ this.showProgress()
+}
+
+log.write = function (msg, style) {
+ if (!this.cursor) return
+ if (this.stream !== this.cursor.stream) {
+ this.cursor = ansi(this.stream, { enabled: colorEnabled })
+ var options = {}
+ if (gaugeTheme != null) options.theme = gaugeTheme
+ if (gaugeTemplate != null) options.template = gaugeTemplate
+ this.gauge = new Gauge(options, this.cursor)
+ }
+
+ style = style || {}
+ if (style.fg) this.cursor.fg[style.fg]()
+ if (style.bg) this.cursor.bg[style.bg]()
+ if (style.bold) this.cursor.bold()
+ if (style.underline) this.cursor.underline()
+ if (style.inverse) this.cursor.inverse()
+ if (style.beep) this.cursor.beep()
+ this.cursor.write(msg).reset()
+}
+
+log.addLevel = function (lvl, n, style, disp) {
+ if (!disp) disp = lvl
+ this.levels[lvl] = n
+ this.style[lvl] = style
+ if (!this[lvl]) this[lvl] = function () {
+ var a = new Array(arguments.length + 1)
+ a[0] = lvl
+ for (var i = 0; i < arguments.length; i ++) {
+ a[i + 1] = arguments[i]
+ }
+ return this.log.apply(this, a)
+ }.bind(this)
+ this.disp[lvl] = disp
+}
+
+log.prefixStyle = { fg: 'magenta' }
+log.headingStyle = { fg: 'white', bg: 'black' }
+
+log.style = {}
+log.levels = {}
+log.disp = {}
+log.addLevel('silly', -Infinity, { inverse: true }, 'sill')
+log.addLevel('verbose', 1000, { fg: 'blue', bg: 'black' }, 'verb')
+log.addLevel('info', 2000, { fg: 'green' })
+log.addLevel('http', 3000, { fg: 'green', bg: 'black' })
+log.addLevel('warn', 4000, { fg: 'black', bg: 'yellow' }, 'WARN')
+log.addLevel('error', 5000, { fg: 'red', bg: 'black' }, 'ERR!')
+log.addLevel('silent', Infinity)
+
+// allow 'error' prefix
+log.on('error', function(){})
Code Review / simantics / district.git / blobdiff