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115 lines
3.4 KiB
115 lines
3.4 KiB
1 year ago
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<p align="center">
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<a href="http://gulpjs.com">
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<img height="257" width="114" src="https://raw.githubusercontent.com/gulpjs/artwork/master/gulp-2x.png">
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</a>
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</p>
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# glogg
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[![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Travis Build Status][travis-image]][travis-url] [![AppVeyor Build Status][appveyor-image]][appveyor-url] [![Coveralls Status][coveralls-image]][coveralls-url] [![Gitter chat][gitter-image]][gitter-url]
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Global logging utility.
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## Usage
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```js
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var getLogger = require('glogg');
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var logger = getLogger('my-namespace');
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// logs strings
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logger.debug('The MOST verbose!');
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logger.info('Some important info');
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logger.warn('All the warnings to you');
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logger.error('OH NO! SOMETHING HAPPENED!');
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// supports util.format!
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logger.info('%s style!', 'printf');
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// log anything
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logger.debug({ my: 'obj' });
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logger.info([1, 2, 3]);
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// somewhere else
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logger.on('info', function(msg){
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// do something with msg
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});
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// must be handled to avoid crashing process
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logger.on('error', function(msg){
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// now it won't crash
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});
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```
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## API
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__Note: This module makes no assumptions about the log levels and they will always
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be emitted. If you are looking to filter some out, your listeners will need to have
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extra logic.__
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### getLogger([namespace])
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Create a new logger at the given namespace (or the default if no namespace is provided).
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Returns an augmented [`sparkles`](https://github.com/phated/sparkles) EventEmitter object
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with 4 methods: `debug()`, `info()`, `warn()` and `error()`. When called, these methods emit
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an event with the same name. If the first argument is a string, the arguments
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are passed through node's `util.format()` before being emitted. Other parts
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of a node program can get the logger by namespace and listen for the events to
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be emitted.
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#### logger.debug(msg)
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Emits a `debug` event with the given `msg`.
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If the first argument is a string, all arguments are passed to node's
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`util.format()` before being emitted.
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#### logger.info(msg)
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Emits a `info` event with the given `msg`.
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If the first argument is a string, all arguments are passed to node's
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`util.format()` before being emitted.
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#### logger.warn(msg)
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Emits a `warn` event with the given `msg`.
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If the first argument is a string, all arguments are passed to node's
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`util.format()` before being emitted.
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#### logger.error(msg)
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Emits a `error` event with the given `msg`.
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If the first argument is a string, all arguments are passed to node's
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`util.format()` before being emitted.
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__Note: You must handle this event in some way or the node process will crash
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when an `error` event is emitted.__
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#### logger.on(event, fn)
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Standard API from node's `EventEmitter`. Use this to listen for events from
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the logger methods.
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## License
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MIT
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[downloads-image]: http://img.shields.io/npm/dm/glogg.svg
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[npm-url]: https://www.npmjs.com/package/glogg
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[npm-image]: http://img.shields.io/npm/v/glogg.svg
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[travis-url]: https://travis-ci.org/gulpjs/glogg
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[travis-image]: http://img.shields.io/travis/gulpjs/glogg.svg?label=travis-ci
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[appveyor-url]: https://ci.appveyor.com/project/gulpjs/glogg
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[appveyor-image]: https://img.shields.io/appveyor/ci/gulpjs/glogg.svg?label=appveyor
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[coveralls-url]: https://coveralls.io/r/gulpjs/glogg
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[coveralls-image]: http://img.shields.io/coveralls/gulpjs/glogg/master.svg
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[gitter-url]: https://gitter.im/gulpjs/gulp
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[gitter-image]: https://badges.gitter.im/gulpjs/gulp.svg
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