试试这个
模式= ^v[0-9]+.[0-9]+.[0-9]+(-[a-zA-Z]+)?$
下面是一个示例代码片段，它将打印标签列表中不匹配的标签。

package main

import (
    "fmt"
    "regexp"
)

func main() {
    pattern := `^v[0-9]+.[0-9]+.[0-9]+(-[a-zA-Z]+)?$`

    tests := []string{
        "v1.2", // this will not match with the pattern

        "v1.2.3",
        "v1.2.3-test",
        "v1.2.3-test-beta", // this will not match with the pattern

        "v1.2.4-beta",
        "v1.2.4-beta12", // this will not match with the pattern
    }

    reg := regexp.MustCompile(pattern)

    for _, test := range tests {
        if !(reg.MatchString(test)) {
            fmt.Printf("[%v] - not matching \n", test)
        }
    }
}

请参阅How to write regular expressions?以了解有关正则表达式的更多信息。