fix(helm): add descriptive error if dependency has blank "repository" (#5152)

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

pkg/downloader/manager.go

@@ -371,6 +371,9 @@ func (m *Manager) getRepoNames(deps []*chartutil.Dependency) (map[string]string,
 	// by Helm.
 	missing := []string{}
 	for _, dd := range deps {
+		if dd.Repository == "" {
+			return nil, fmt.Errorf("no 'repository' field specified for dependency: %q", dd.Name)
+		}
 		// if dep chart is from local path, verify the path is valid
 		if strings.HasPrefix(dd.Repository, "file://") {
 			if _, err := resolver.GetLocalPath(dd.Repository, m.ChartPath); err != nil {

pkg/downloader/manager_test.go

@@ -18,6 +18,7 @@ package downloader
 import (
 	"bytes"
 	"reflect"
+	"strings"
 	"testing"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -103,6 +104,7 @@ func TestGetRepoNames(t *testing.T) {
 		req         []*chartutil.Dependency
 		expect      map[string]string
 		err         bool
+		expectedErr string
 	}{
 		{
 			name: "no repo definition failure",
@@ -118,6 +120,14 @@ func TestGetRepoNames(t *testing.T) {
 			},
 			err: true,
 		},
+		{
+			name: "dependency entry missing 'repository' field -- e.g. spelled 'repo'",
+			req: []*chartutil.Dependency{
+				{Name: "dependency-missing-repository-field"},
+			},
+			err:         true,
+			expectedErr: "no 'repository' field specified for dependency: \"dependency-missing-repository-field\"",
+		},
 		{
 			name: "no repo definition failure",
 			req: []*chartutil.Dependency{
@@ -152,6 +162,9 @@ func TestGetRepoNames(t *testing.T) {
 		l, err := m.getRepoNames(tt.req)
 		if err != nil {
 			if tt.err {
+				if !strings.Contains(err.Error(), tt.expectedErr) {
+					t.Fatalf("%s: expected error: %s, got: %s", tt.name, tt.expectedErr, err.Error())
+				}
 				continue
 			}
 			t.Fatal(err)