_get(path, opts, cb) {
   const host = location.protocol + '//' + location.host
   const url = `${host}/api/v4/projects/${opts.repo.username}%2F${opts.repo.reponame}${path || ''}`
   const cfg = {url, method: 'GET', cache: false}

   if (opts.token) {
     cfg.headers = {Authorization: 'token ' + opts.token}
   }

   function loadAll(data0, xTotalPages) {
     let data_arr = [data0];
     let count = 1;
     for (let i = 2; i <= xTotalPages; i++) {
       cfg.data = {page: i}
       // cfg.async = false
       $.ajax(cfg)
         .done((data, textStatus, request) => {
           count++;
           if (path && path.indexOf('/git/trees') === 0 && data.truncated) {
             this._handleError({status: 206}, cb)
           } else {
             data_arr[i - 1] = data
             if (count == xTotalPages) {
               const merged = [].concat.apply([], data_arr)
               cb(null, merged)
             }
           }
         })
         .fail((jqXHR) => this._handleError(jqXHR, cb))
     }
   }

   $.ajax(cfg)
     .done((data, textStatus, request) => {
       if (path && path.indexOf('/git/trees') === 0 && data.truncated) {
         this._handleError({status: 206}, cb)
       }
       else {
         const xTotalPages = request.getResponseHeader('X-Total-Pages');
         if (xTotalPages > 1) {
           loadAll(data, xTotalPages);
           return
         }
         cb(null, data)
       }
     })
     .fail((jqXHR) => this._handleError(jqXHR, cb))
 }