forked from lix-project/lix-website
116 lines
3.5 KiB
JavaScript
116 lines
3.5 KiB
JavaScript
// This is the **logger** module for *Karma*. It uses
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// [log4js](https://github.com/nomiddlename/log4js-node) to handle and
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// configure all logging that happens inside of *Karma*.
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// ### Helpers and Setup
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let log4js = require('log4js')
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const helper = require('./helper')
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const constant = require('./constants')
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// #### Public Functions
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// Setup the logger by passing in the configuration options. It needs
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// three arguments:
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//
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// setup(logLevel, colors, appenders)
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//
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// * `logLevel`: *String* Defines the global log level.
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// * `colors`: *Boolean* Use colors in the stdout or not.
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// * `appenders`: *Object* This will be passed as appenders to log4js
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// to allow for fine grained configuration of log4js. For more information
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// see https://github.com/nomiddlename/log4js-node.
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// *Array* is also accepted for backwards compatibility.
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function setup (level, colors, appenders) {
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// Turn color on/off on the console appenders with pattern layout
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const pattern = colors ? constant.COLOR_PATTERN : constant.NO_COLOR_PATTERN
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if (appenders) {
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// Convert Array to Object for backwards compatibility.
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if (appenders.map) {
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if (appenders.length === 0) {
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appenders = [constant.CONSOLE_APPENDER]
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}
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const v1Appenders = appenders
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appenders = {}
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v1Appenders.forEach(function (appender, index) {
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if (appender.type === 'console') {
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appenders.console = appender
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if (helper.isDefined(appender.layout) && appender.layout.type === 'pattern') {
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appender.layout.pattern = pattern
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}
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} else {
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appenders[index + ''] = appender
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}
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return appender
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})
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}
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} else {
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appenders = { console: constant.CONSOLE_APPENDER }
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}
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log4js.configure({
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appenders: appenders,
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categories: {
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default: {
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appenders: Object.keys(appenders),
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level: level
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}
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}
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})
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}
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// Setup the logger by passing in the config object. The function sets the
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// `colors` and `logLevel` if they are defined. It takes two arguments:
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//
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// setupFromConfig(config, appenders)
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//
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// * `config`: *Object* The configuration object.
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// * `appenders`: *Object* This will be passed as appenders to log4js
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// to allow for fine grained configuration of log4js. For more information
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// see https://github.com/nomiddlename/log4js-node.
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// *Array* is also accepted for backwards compatibility.
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function setupFromConfig (config, appenders) {
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let useColors = true
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let logLevel = constant.LOG_INFO
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if (helper.isDefined(config.colors)) {
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useColors = config.colors
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}
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if (helper.isDefined(config.logLevel)) {
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logLevel = config.logLevel
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}
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setup(logLevel, useColors, appenders)
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}
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const loggerCache = {}
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// Create a new logger. There are two optional arguments
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// * `name`, which defaults to `karma` and
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// If the `name = 'socket.io'` this will create a special wrapper
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// to be used as a logger for socket.io.
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// * `level`, which defaults to the global level.
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function create (name, level) {
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name = name || 'karma'
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let logger
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if (Object.prototype.hasOwnProperty.call(loggerCache, name)) {
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logger = loggerCache[name]
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} else {
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logger = log4js.getLogger(name)
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loggerCache[name] = logger
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}
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if (helper.isDefined(level)) {
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logger.setLevel(level)
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}
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return logger
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}
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// #### Publish
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exports.create = create
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exports.setup = setup
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exports.setupFromConfig = setupFromConfig
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exports._rebindLog4js4testing = function (mockLog4js) {
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log4js = mockLog4js
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}
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