Semver

semver.go

package main

import (
	"flag"
	"fmt"

	"github.com/Masterminds/semver/v3"
)

var vFlag = flag.String("version", "0.1", "version to check")

func main() {
	flag.Parse()

	c, err := semver.NewConstraint(">= 0.1")
	if err != nil {
		fmt.Println("constraint not parseable")
	}

	v, err := semver.NewVersion(*vFlag)
	if err != nil {
		fmt.Println("version not parseable")
	}

	valid, _ := c.Validate(v)

	if !valid {
		fmt.Println("not valid")
	}

}