isolate and mark platform dependent code

now unit tests compile on OS X and (some of them) work

util/util.go

@@ -12,7 +12,6 @@ import (
 	"os"
 	"path"
 	"strings"
-	"syscall"
 
 	"gopkg.in/yaml.v2"
 
@@ -44,37 +43,6 @@ func GetOSType() string {
 
 }
 
-func mountProc() error {
-	if _, err := os.Stat("/proc/self/mountinfo"); os.IsNotExist(err) {
-		if _, err := os.Stat("/proc"); os.IsNotExist(err) {
-			if err = os.Mkdir("/proc", 0755); err != nil {
-				return err
-			}
-		}
-
-		if err := syscall.Mount("none", "/proc", "proc", 0, ""); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func Mount(device, directory, fsType, options string) error {
-	if err := mountProc(); err != nil {
-		return nil
-	}
-
-	if _, err := os.Stat(directory); os.IsNotExist(err) {
-		err = os.MkdirAll(directory, 0755)
-		if err != nil {
-			return err
-		}
-	}
-
-	return mount.Mount(device, directory, fsType, options)
-}
-
 func Remount(directory, options string) error {
 	return mount.Mount("", directory, "", fmt.Sprintf("remount,%s", options))
 }