Simple script written in Golang to extract all variables of a given .tf file

extract.go

package main

import (
	"regexp"
    "fmt"
    "io/ioutil"
    "os"
)

func main() {

	// Get file path
	filePath := os.Args[1]
	
	// Open file
	bytes, err := ioutil.ReadFile(filePath)
	
	// if error while openning
	if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    // get content as string
    content := string(bytes)

    re, _ := regexp.Compile(`(?m)variable "([a-zA-Z_]+)"`)
    for _, match := range re.FindAllStringSubmatch(content, -1) {
        fmt.Println(match[1] + " =")
    }
}