Version normalizer and comparison library for go, heavy based on PHP version_compare function and Version comparsion libs from [Composer](https://github.com/composer/composer) PHP project
Installation
------------
The recommended way to install go-version
```
go get github.com/mcuadros/go-version
```
Examples
--------
How import the package
```go
import (
"github.com/mcuadros/go-version"
)
```
`version.Normalize()`: Normalizes a version string to be able to perform comparisons on it
```go
version.Normalize("10.4.13-b")
//Returns: 10.4.13.0-beta
```
`version.CompareSimple()`: Compares two normalizated version number strings
```go
version.CompareSimple("1.2", "1.0.1")
//Returns: 1
version.CompareSimple("1.0rc1", "1.0")
//Returns: -1
```
`version.Compare()`: Compares two normalizated version number strings, for a particular relationship
```go
version.Compare("1.0-dev", "1.0", "<")
//Returns: true
version.Compare("1.0rc1", "1.0", ">=")
//Returns: false
version.Compare("2.3.4", "v3.1.2", "<")
//Returns: true
```
`version.ConstrainGroup.Match()`: Match a given version againts a group of constrains, read about constraint string format at [Composer documentation](http://getcomposer.org/doc/01-basic-usage.md#package-versions)
```go
c := version.NewConstrainGroupFromString(">2.0,<=3.0")
c.Match("2.5.0beta")
//Returns: true
c := version.NewConstrainGroupFromString("~1.2.3")
c.Match("1.2.3.5")
//Returns: true
```
`version.Sort()`: Sorts a string slice of version number strings using version.CompareSimple()
