internal/exec.go


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package internal

import (
	"fmt"
	"os/exec"
)

type CommandNotFound string

func (e CommandNotFound) Error() string {
	return fmt.Sprintf("command '%s' is missing and must be present for operation", string(e))
}

func RequireCommand(cmd string) error {
	_, err := exec.LookPath(cmd)
	if err != nil {
		return CommandNotFound(cmd)
	}

	return nil
}