created init client method and init command

chub/init.go

@@ -1,11 +1,43 @@
 package main
 
 import (
-	"fmt"
+	"chub/client"
+	"encoding/json"
+	homedir "github.com/mitchellh/go-homedir"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"runtime"
 )
 
 func initCommand(guid string) {
+	confguration := config{MachineGuid: guid}
+	saveGuidToHomedir(configuration)
 
-	fmt.Printf("initializing %v\n", guid)
+	machineToInitialize := client.Machine{os.Hostname(), runtime.GOOS, runtime.GOARCH, guid}
+	client.init(&machineToInitialize)
+
+}
+
+type config struct {
+	MachineGuid string
+}
+
+func saveGuidToHomedir(configuration config) {
+
+	directory := homedir.Expand() + filepath.Separator + ConfigurationFolderName
+	if err := os.Mkdir(directory, ConfigurationFilePermissions); err != nil {
+		panic(err)
+	}
+
+	configByteContent, err := json.Marshal(configuration)
+	if err != nil {
+		panic("Something is terribly wrong. I am sorry. I am so so sorry. :~(")
+	}
+
+	err := ioutil.WriteFile(directory+filepath.Separator+ConfigurationFileName, configByteContent, ConfigurationFilePermissions)
+	if err != nil {
+		panic("I cannot write to config file in user directory. How can this be ?")
+	}
 
 }