Fix the panic when no config file (#269)

* Fix the panic when no config file

* Add tests for open cmd

* Remove unused functions

app/cmd/casc_open.go

@@ -2,7 +2,9 @@ package cmd
 
 import (
 	"fmt"
+
 	"github.com/jenkins-zh/jenkins-cli/app/i18n"
+
 	"github.com/jenkins-zh/jenkins-cli/util"
 	"github.com/spf13/cobra"
 )

app/cmd/center_start.go

@@ -2,11 +2,11 @@ package cmd
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/jenkins-zh/jenkins-cli/app/i18n"
 	"github.com/jenkins-zh/jenkins-cli/util"
 	"github.com/mitchellh/go-homedir"
-	"os"
 
 	"github.com/spf13/cobra"
 )

app/cmd/config.go

@@ -31,13 +31,18 @@ var configCmd = &cobra.Command{
 	Aliases: []string{"cfg"},
 	Short:   i18n.T("Manage the config of jcli"),
 	Long:    i18n.T("Manage the config of jcli"),
-	Run: func(cmd *cobra.Command, _ []string) {
+	RunE: func(cmd *cobra.Command, _ []string) (err error) {
 		current := getCurrentJenkins()
-		if current.Description != "" {
-			cmd.Printf("Current Jenkins's name is %s, url is %s, description is %s\n", current.Name, current.URL, current.Description)
+		if current == nil {
+			err = fmt.Errorf("no config file found or no current setting")
 		} else {
-			cmd.Printf("Current Jenkins's name is %s, url is %s\n", current.Name, current.URL)
+			if current.Description != "" {
+				cmd.Printf("Current Jenkins's name is %s, url is %s, description is %s\n", current.Name, current.URL, current.Description)
+			} else {
+				cmd.Printf("Current Jenkins's name is %s, url is %s\n", current.Name, current.URL)
+			}
 		}
+		return
 	},
 	Example: `  jcli config generate
   jcli config list
@@ -175,7 +180,9 @@ func loadConfig(path string) (err error) {
 
 // getMirrors returns the mirror list, one official mirror should be returned if user don't give it
 func getMirrors() (mirrors []JenkinsMirror) {
-	mirrors = config.Mirrors
+	if config != nil {
+		mirrors = config.Mirrors
+	}
 	if len(mirrors) == 0 {
 		mirrors = []JenkinsMirror{
 			{

app/cmd/plugin_open.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"fmt"
+
 	"github.com/jenkins-zh/jenkins-cli/util"
 	"github.com/spf13/cobra"
 )