ref(helm): expose Get for repository file

Get method is a useful shortcut that can be used
by other apps that use helm repo package.

pkg/repo/repo.go

@@ -116,12 +116,18 @@ func (r *RepoFile) Update(re ...*Entry) {
 
 // Has returns true if the given name is already a repository name.
 func (r *RepoFile) Has(name string) bool {
-	for _, rf := range r.Repositories {
-		if rf.Name == name {
-			return true
+	_, ok := r.Get(name)
+	return ok
+}
+
+// Get returns entry by the given name if it exists.
+func (r *RepoFile) Get(name string) (*Entry, bool) {
+	for _, entry := range r.Repositories {
+		if entry.Name == name {
+			return entry, true
 		}
 	}
-	return false
+	return nil, false
 }
 
 // Remove removes the entry from the list of repositories.

pkg/repo/repo_test.go

@@ -16,10 +16,12 @@ limitations under the License.
 
 package repo
 
-import "testing"
-import "io/ioutil"
-import "os"
-import "strings"
+import (
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+)
 
 const testRepositoriesFile = "testdata/repositories.yaml"
 
@@ -120,6 +122,43 @@ func TestNewPreV1RepositoriesFile(t *testing.T) {
 	}
 }
 
+func TestRepoFile_Get(t *testing.T) {
+	repo := NewRepoFile()
+	repo.Add(
+		&Entry{
+			Name:  "first",
+			URL:   "https://example.com/first",
+			Cache: "first-index.yaml",
+		},
+		&Entry{
+			Name:  "second",
+			URL:   "https://example.com/second",
+			Cache: "second-index.yaml",
+		},
+		&Entry{
+			Name:  "third",
+			URL:   "https://example.com/third",
+			Cache: "third-index.yaml",
+		},
+		&Entry{
+			Name:  "fourth",
+			URL:   "https://example.com/fourth",
+			Cache: "fourth-index.yaml",
+		},
+	)
+
+	name := "second"
+
+	entry, ok := repo.Get(name)
+	if !ok {
+		t.Fatalf("Expected repo entry %q to be found", name)
+	}
+
+	if entry.URL != "https://example.com/second" {
+		t.Fatalf("Expected repo URL to be %q but got %q", "https://example.com/second", entry.URL)
+	}
+}
+
 func TestRemoveRepository(t *testing.T) {
 	sampleRepository := NewRepoFile()
 	sampleRepository.Add(