semver

Version 2.0.0 compliant semantic versioning library, with parsing and comparison and no external dependencies. JSON and SQL ready.

Parse

v, err := semver.Parse("1.6.3-alpha")
if err != nil {
	// handle err
}
// v == &semver.Version{Major:1, Minor:6, Patch:3, Prerelease:[]string{"alpha"}, Build:[]string(nil), Stable:true}

vs, _ := semver.ParseMultiple([]string{"1.0.0", "1.1.0"})

Validate

var valid bool
if _, err := semver.Parse("1.0.0"); err == nil {
    valid = true
}

Compare

a, _ := semver.Parse("1.0.0")
b, _ := semver.Parse("1.0.1")

n := a.CompareTo(b) // n == 1 means a greater than b, n == 0 means a equal to b, n == -1 means a less than b

Filtering

vers, _ := semver.ParseMultiple([]string{"1.0.0", "2.0.0", "2.1.0", "3.0.0"})

v, err := semver.Filter("^2.0.0", vers)   
if err != nil {
// handle err
}
// v == [2.0.0, 2.1.0]

Specifying version ranges

• ^ - include everything greater than or equal to the stated version that doesn't increment the first non-zero item of the version core
  • eg ^2.1.0 includes version 2.1.0 and any newer 2.x.x versions
  • eg ^0.3.0 will match only versions 0.3.0 and any newer 0.3.x versions
  • For example, ^2.2.1 can be expanded out as >=2.2.1 <3.0.0
• ~ - include everything greater than or equal to the stated version in the current minor range
  • eg ~2.2.0 will match version 2.2.0 and any newer 2.2.x but not 2.3.x
• > < = >= <= for version comparisons - specify a range of versions
  • eg >2.1.0 matches anything greater than 2.1.0
• || - include multiple sets of version specifiers
  • eg ^2.0.0 <2.2.0 || > 2.3.0 matches versions that satisfy both ^2.0.0 <2.2.0 and >2.3.0

Version numbers must be in their complete form, for example 2 will not work - it must be 2.0.0.