hashicorp/go-version
GitHub: hashicorp/go-version
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# Versioning Library for Go
[](https://pkg.go.dev/github.com/hashicorp/go-version)
go-version is a library for parsing versions and version constraints,
and verifying versions against a set of constraints. go-version
can sort a collection of versions properly, handles prerelease/beta
versions, can increment versions, etc.
## Installation and Usage
Package documentation can be found on
[Go Reference](https://pkg.go.dev/github.com/hashicorp/go-version).
Installation can be done with a normal `go get`:
$ go get github.com/hashicorp/go-version
#### Version Parsing and Comparison
v1, err := version.NewVersion("1.2")
v2, err := version.NewVersion("1.5+metadata")
// Comparison example. There is also GreaterThan, Equal, and just
// a simple Compare that returns an int allowing easy >=, <=, etc.
if v1.LessThan(v2) {
fmt.Printf("%s is less than %s", v1, v2)
}
#### Version Parsing and Comparison with Prefixes
The library also supports parsing versions with a custom prefix.
Using the `WithPrefix` option, you can specify a prefix to strip
before parsing the version.
Use `WithPrefix` when your input strings carry a known release prefix such as
`deployment-`, `controller-`, etc.
After parsing, the prefix is not part of the canonical version value. This
means the regular comparison methods such as `Compare`, `LessThan`, `Equal`,
and `GreaterThan` compare only the stripped version. If you compare versions
from different prefixes with these methods, the prefixes are ignored. If you
need to reject cross-prefix comparisons, inspect the parsed prefixes before
comparing the versions.
v1, _ := version.NewVersion("deployment-v1.2.3-beta+metadata", version.WithPrefix("deployment-"))
v2, _ := version.NewVersion("deployment-v1.2.4", version.WithPrefix("deployment-"))
if v1.LessThan(v2) {
fmt.Printf("%s (%s) is less than %s (%s)\n", v1, v1.Original(), v2, v2.Original())
// Outputs: 1.2.3-beta+metadata (deployment-v1.2.3-beta+metadata) is less than 1.2.4 (deployment-v1.2.4)
}
#### Version Constraints
v1, err := version.NewVersion("1.2")
// Constraints example.
constraints, err := version.NewConstraint(">= 1.0, < 1.4")
if constraints.Check(v1) {
fmt.Printf("%s satisfies constraints %s", v1, constraints)
}
#### Version Sorting
versionsRaw := []string{"1.1", "0.7.1", "1.4-beta", "1.4", "2"}
versions := make([]*version.Version, len(versionsRaw))
for i, raw := range versionsRaw {
v, _ := version.NewVersion(raw)
versions[i] = v
}
// After this, the versions are properly sorted
sort.Sort(version.Collection(versions))
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