ListGroupProjects implementation (#110)

groups.go

@@ -226,6 +226,31 @@ func (s *GroupsService) ListGroupMembers(gid interface{}) ([]*GroupMember, *Resp
 	return g, resp, err
 }
 
+// ListGroupProjects get a list of group projects
+//
+// GitLab API docs:
+// https://docs.gitlab.com/ce/api/groups.html#list-a-group-s-projects
+func (s *GroupsService) ListGroupProjects(gid interface{}) ([]*Project, *Response, error) {
+	group, err := parseID(gid)
+	if err != nil {
+		return nil, nil, err
+	}
+	u := fmt.Sprintf("groups/%s/projects", group)
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	var p []*Project
+	resp, err := s.client.Do(req, &p)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return p, resp, err
+}
+
 // AddGroupMemberOptions represents the available AddGroupMember() options.
 //
 // GitLab API docs: https://docs.gitlab.com/ce/api/groups.html#add-group-member