licenses: add support for repository license via RepositoriesService.Get

github/repos.go

@@ -49,6 +49,9 @@ type Repository struct {
 	Organization     *Organization    `json:"organization,omitempty"`
 	Permissions      *map[string]bool `json:"permissions,omitempty"`
 
+	// Only provided when using RepositoriesService.Get while in preview
+	License *License `json:"license,omitempty"`
+
 	// Additional mutable fields when creating and editing a repository
 	Private      *bool `json:"private"`
 	HasIssues    *bool `json:"has_issues"`
@@ -255,6 +258,10 @@ func (s *RepositoriesService) Get(owner, repo string) (*Repository, *Response, e
 		return nil, nil, err
 	}
 
+	// TODO: remove custom Accept header when the license support fully launches
+	// https://developer.github.com/v3/licenses/#get-a-repositorys-license
+	req.Header.Set("Accept", mediaTypeLicensesPreview)
+
 	repository := new(Repository)
 	resp, err := s.client.Do(req, repository)
 	if err != nil {

github/repos_test.go

@@ -191,7 +191,8 @@ func TestRepositoriesService_Get(t *testing.T) {
 
 	mux.HandleFunc("/repos/o/r", func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, "GET")
-		fmt.Fprint(w, `{"id":1,"name":"n","description":"d","owner":{"login":"l"}}`)
+		testHeader(t, r, "Accept", mediaTypeLicensesPreview)
+		fmt.Fprint(w, `{"id":1,"name":"n","description":"d","owner":{"login":"l"},"license":{"key":"mit"}}`)
 	})
 
 	repo, _, err := client.Repositories.Get("o", "r")
@@ -199,7 +200,7 @@ func TestRepositoriesService_Get(t *testing.T) {
 		t.Errorf("Repositories.Get returned error: %v", err)
 	}
 
-	want := &Repository{ID: Int(1), Name: String("n"), Description: String("d"), Owner: &User{Login: String("l")}}
+	want := &Repository{ID: Int(1), Name: String("n"), Description: String("d"), Owner: &User{Login: String("l")}, License: &License{Key: String("mit")}}
 	if !reflect.DeepEqual(repo, want) {
 		t.Errorf("Repositories.Get returned %+v, want %+v", repo, want)
 	}