terraform/vendor/github.com/cihub/seelog/README.markdown

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Seelog
=======
Seelog is a powerful and easy-to-learn logging framework that provides functionality for flexible dispatching, filtering, and formatting log messages.
It is natively written in the [Go](http://golang.org/) programming language.
[![Build Status](https://drone.io/github.com/cihub/seelog/status.png)](https://drone.io/github.com/cihub/seelog/latest)
Features
------------------
* Xml configuring to be able to change logger parameters without recompilation
* Changing configurations on the fly without app restart
* Possibility to set different log configurations for different project files and functions
* Adjustable message formatting
* Simultaneous log output to multiple streams
* Choosing logger priority strategy to minimize performance hit
* Different output writers
* Console writer
* File writer
* Buffered writer (Chunk writer)
* Rolling log writer (Logging with rotation)
* SMTP writer
* Others... (See [Wiki](https://github.com/cihub/seelog/wiki))
* Log message wrappers (JSON, XML, etc.)
* Global variables and functions for easy usage in standalone apps
* Functions for flexible usage in libraries
Quick-start
-----------
```go
package main
import log "github.com/cihub/seelog"
func main() {
defer log.Flush()
log.Info("Hello from Seelog!")
}
```
Installation
------------
If you don't have the Go development environment installed, visit the
[Getting Started](http://golang.org/doc/install.html) document and follow the instructions. Once you're ready, execute the following command:
```
go get -u github.com/cihub/seelog
```
*IMPORTANT*: If you are not using the latest release version of Go, check out this [wiki page](https://github.com/cihub/seelog/wiki/Notes-on-'go-get')
Documentation
---------------
Seelog has github wiki pages, which contain detailed how-tos references: https://github.com/cihub/seelog/wiki
Examples
---------------
Seelog examples can be found here: [seelog-examples](https://github.com/cihub/seelog-examples)
Issues
---------------
Feel free to push issues that could make Seelog better: https://github.com/cihub/seelog/issues
Changelog
---------------
* **v2.6** : Config using code and custom formatters
* Configuration using code in addition to xml (All internal receiver/dispatcher/logger types are now exported).
* Custom formatters. Check [wiki](https://github.com/cihub/seelog/wiki/Custom-formatters)
* Bugfixes and internal improvements.
* **v2.5** : Interaction with other systems. Part 2: custom receivers
* Finished custom receivers feature. Check [wiki](https://github.com/cihub/seelog/wiki/custom-receivers)
* Added 'LoggerFromCustomReceiver'
* Added 'LoggerFromWriterWithMinLevelAndFormat'
* Added 'LoggerFromCustomReceiver'
* Added 'LoggerFromParamConfigAs...'
* **v2.4** : Interaction with other systems. Part 1: wrapping seelog
* Added configurable caller stack skip logic
* Added 'SetAdditionalStackDepth' to 'LoggerInterface'
* **v2.3** : Rethinking 'rolling' receiver
* Reimplemented 'rolling' receiver
* Added 'Max rolls' feature for 'rolling' receiver with type='date'
* Fixed 'rolling' receiver issue: renaming on Windows
* **v2.2** : go1.0 compatibility point [go1.0 tag]
* Fixed internal bugs
* Added 'ANSI n [;k]' format identifier: %EscN
* Made current release go1 compatible
* **v2.1** : Some new features
* Rolling receiver archiving option.
* Added format identifier: %Line
* Smtp: added paths to PEM files directories
* Added format identifier: %FuncShort
* Warn, Error and Critical methods now return an error
* **v2.0** : Second major release. BREAKING CHANGES.
* Support of binaries with stripped symbols
* Added log strategy: adaptive
* Critical message now forces Flush()
* Added predefined formats: xml-debug, xml-debug-short, xml, xml-short, json-debug, json-debug-short, json, json-short, debug, debug-short, fast
* Added receiver: conn (network connection writer)
* BREAKING CHANGE: added Tracef, Debugf, Infof, etc. to satisfy the print/printf principle
* Bug fixes
* **v1.0** : Initial release. Features:
* Xml config
* Changing configurations on the fly without app restart
* Contraints and exceptions
* Formatting
* Log strategies: sync, async loop, async timer
* Receivers: buffered, console, file, rolling, smtp