Regex for Git Version Tag

javascript

const regex = /^v?(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/;
const isValid = regex.test(value);

python

import re
pattern = r'^v?(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^v?(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^v?(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/', $value)) {
    echo "valid";
}

java

String pattern = "^v?(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)$";
boolean isValid = value.matches(pattern);