example.go

package main

import (
	"fmt"
	"regexp"
)

func main() {
	// Compile the expression once, usually at init time.
	// Use raw strings to avoid having to quote the backslashes.
	var validID = regexp.MustCompile(`^jsonpath\=(.*)`)

	fmt.Println(validID.MatchString("jsonpath='{.items[?(@.spec.nodeName == \"MERDA\")].metadata.name}'"))
		fmt.Println(validID.ReplaceAllString("jsonpath='{.items[?(@.spec.nodeName == \"MERDA\")].metadata.name}'", "$1"))
	fmt.Println(validID.MatchString("eve[7]"))
	fmt.Println(validID.MatchString("Job[48]"))
	fmt.Println(validID.MatchString("snakey"))
}