refactor: actual context getting

cli/app.go

@@ -97,8 +97,10 @@ var appPsCommand = &cli.Command{
 	Name: "ps",
 	Action: func(c *cli.Context) error {
 		ctx := context.Background()
-		fmt.Println(Context)
+		cl, err := client.NewClientWithContext(Context)
-		cl := client.NewClientWithContext(Context)
+		if err != nil {
+			logrus.Fatal(err)
+		}
 		tasks, err := cl.TaskList(ctx, types.TaskListOptions{})
 		if err != nil {
 			logrus.Fatal(err)

client/client.go

@@ -14,8 +14,16 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-func NewClientWithContext(contextURL string) *dClient.Client {
+func NewClientWithContext(contextName string) (*dClient.Client, error) {
-	helper := newConnectionHelper(contextURL)
+	context, err := GetContext(contextName)
+	if err != nil {
+		return nil, err
+	}
+	ctxEndpoint, err := GetContextEndpoint(context)
+	if err != nil {
+		return nil, err
+	}
+	helper := newConnectionHelper(ctxEndpoint)
 	httpClient := &http.Client{
 		// No tls
 		// No proxy
@@ -46,7 +54,21 @@ func NewClientWithContext(contextURL string) *dClient.Client {
 	if err != nil {
 		logrus.Fatalf("unable to create Docker client: %s", err)
 	}
-	return cl
+	return cl, nil
+}
+
+func GetContext(contextName string) (dCliContextStore.Metadata, error) {
+	ctxs, err := NewDefaultDockerContextStore().Store.List()
+	if err != nil {
+		return dCliContextStore.Metadata{}, err
+	}
+	var context dCliContextStore.Metadata
+	for _, ctx := range ctxs {
+		if ctx.Name == contextName {
+			context = ctx
+		}
+	}
+	return context, nil
 }
 
 func GetContextEndpoint(ctx dCliContextStore.Metadata) (string, error) {