package installer

import (
	"fmt"
	"os"
)

func validateNonEmptyRegularFile(path string, requireExecutable bool) error {
	info, err := os.Lstat(path)
	if err != nil {
		return err
	}
	if !info.Mode().IsRegular() || info.Mode()&os.ModeSymlink != 0 || info.Size() == 0 {
		return fmt.Errorf("%s is not a non-empty regular file", path)
	}
	if requireExecutable && info.Mode().Perm()&0111 == 0 {
		return fmt.Errorf("%s is not executable", path)
	}
	return nil
}