package core

import (
	"os/exec"
	"regexp"
	"strings"
)

var (
	sh = regexp.MustCompile("\\{([^\\}]+)\\}")
)

func Process(source string) string {
	source = sh.ReplaceAllStringFunc(source, func(match string) string {
		cmd := sh.FindStringSubmatch(match)[1]
		args := strings.Fields(cmd)
		shellArgs := []string{"-c", strings.Join(args, " ")}
		output, err := exec.Command("sh", shellArgs...).CombinedOutput()

		if err != nil {
			return err.Error()
		}

		return strings.Trim(string(output), "\n")
	})

	return source
}