ref(client): return cleaner errors

cmd/helm/repository.go

@@ -83,7 +83,6 @@ func addRepo(c *cli.Context) error {
 	payload, _ := json.Marshal(repo.Repo{URL: repoURL, Name: name})
 	msg := ""
 	if _, err := NewClient(c).Post(chartRepoPath, payload, &msg); err != nil {
-		//TODO: Return more specific errors to the user
 		return err
 	}
 	format.Info(name + " has been added to your chart repositories!")

pkg/client/client.go

@@ -27,6 +27,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/kubernetes/helm/pkg/httputil"
 	"github.com/kubernetes/helm/pkg/version"
 )
 
@@ -221,8 +222,20 @@ func (r *Response) Success() bool {
 
 // HTTPError creates a new HTTPError from response
 func (r *Response) HTTPError() error {
+	contentType := r.Header.Get("Content-Type")
+
 	defer r.Body.Close()
 	body, err := ioutil.ReadAll(r.Body)
+
+	if contentType == "application/json" {
+		httpErr := httputil.Error{}
+		json.Unmarshal(body, &httpErr)
+		return &HTTPError{
+			StatusCode: r.StatusCode,
+			Message:    httpErr.Msg,
+			URL:        r.Request.URL,
+		}
+	} else {
 		if err != nil {
 			return err
 		}
@@ -231,6 +244,9 @@ func (r *Response) HTTPError() error {
 			Message:    string(body),
 			URL:        r.Request.URL,
 		}
+	}
+
+	return nil
 }
 
 // HTTPError is an error caused by an unexpected HTTP status code.