Give notice of high sierra issues

Resolves #620

main.go

@@ -68,7 +68,11 @@ func main() {
 	// do the commands configure check here
 	command := strings.Join(os.Args, " ")
 	if _, err := models.LoadConfig(); err != nil && !strings.Contains(command, " config") && !strings.Contains(command, "env server") {
-		processors.Configure()
+		err = processors.Configure()
+		if err != nil {
+			fmt.Println(err.Error())
+			os.Exit(1)
+		}
 	}
 
 	migrationCheck()

processors/configure.go

@@ -3,22 +3,51 @@ package processors
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"runtime"
 	"time"
 
 	"github.com/nanobox-io/nanobox/models"
+	"github.com/nanobox-io/nanobox/util"
 )
 
 var configured bool
 
 func Configure() error {
+	var os string
+
 	// make sure to only run configure one time
 	if configured {
 		return nil
 	}
 	configured = true
 
-	<-time.After(time.Second)
+	v, err := util.OsDetect()
+	if err == nil {
+		os = v
+	}
+
+	if os == "high sierra" {
+		// warn about high sierra
+		hasRead := stringAsker(`
+--------------------------------------------------------------------------------
++ WARNING:
++
++ MacOS High Sierra introduces breaking changes to Nanobox!
++
++ Please ensure you have read the following guides before continuing:
++ https://content.nanobox.io/installing-nanobox-on-macos-high-sierra/
+--------------------------------------------------------------------------------
+
+Have you already read the guide? y/n`, map[string]string{"y": "yes", "n": "no"})
+		if hasRead == "no" {
+			exec.Command("open", "https://content.nanobox.io/installing-nanobox-on-macos-high-sierra/").Start()
+			return fmt.Errorf("\nEnding configure, please read the guide and try again.\n")
+		}
+	}
+
+	// todo: why do we wait?
+	<-time.After(150 * time.Millisecond)
 
 	config := &models.Config{
 		Provider:  "docker-machine",
@@ -83,13 +112,15 @@ How many GB of RAM would you like to make available to the VM (2-4)?
 
 Answer: `, 8)
 
-	// ask about mount types
-	config.MountType = stringAsker(`
+	if os != "high sierra" {
+		// ask about mount types
+		config.MountType = stringAsker(`
 Would you like to enable netfs for faster filesystem access (y/n)?
 -------------------------------------------------------------------
   Note : We HIGHLY recommend (y). Using this option may prompt for password
 
 Answer: `, map[string]string{"y": "netfs", "n": "native"})
+	}
 
 	config.Save()
 

util/os.go

@@ -0,0 +1,46 @@
+package util
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+	"regexp"
+)
+
+func OsDetect() (string, error) {
+	switch runtime.GOOS {
+	case "darwin":
+		return getDarwin()
+	case "windows":
+		return "windows", nil
+	case "linux":
+		return "linux", nil
+	}
+
+	return "", fmt.Errorf("Unsupported operating system. Please contact support.")
+}
+
+func getDarwin() (string, error) {
+	out, err := exec.Command("/usr/bin/sw_vers", "-productVersion").Output()
+	if err != nil {
+		return "", fmt.Errorf("Failed to retrieve version - %s", err.Error())
+	}
+	r, _ := regexp.Compile("10\\.([0-9]+).*")
+	match := r.FindStringSubmatch(string(out))
+	if len(match) != 2 {
+		return "", fmt.Errorf("Failed to parse version")
+	}
+
+	return toDarwin(match[1])
+}
+
+func toDarwin(v string) (string, error) {
+	switch v {
+	case "12":
+		return "sierra", nil
+	case "13":
+		return "high sierra", nil
+	default:
+		return "incompatible", fmt.Errorf("Incompatible OSX version. Please contact support.")
+	}
+}