Fix failed sitemap generation

The issue is due to `vendor/bundle` is not picked up

Please see Aupajo/middleman-search_engine_sitemap#5

.travis.yml

@@ -1,7 +1,9 @@
 language: ruby
 sudo: false
-bundler_args: --without development --jobs=3 --retry=3
-cache: bundler
+install: bundle install --without development --jobs=3 --retry=3
+cache:
+  directories:
+  - bundle
 branches:
   only:
   - build
@@ -15,8 +17,7 @@ before_script:
 - git remote add origin https://joneslee85:${GH_TOKEN}@github.com/hanami/hanami.github.io.git
 - mkdir build
 script:
-- bundle exec middleman build
-- bundle exec middleman deploy
+- bundle exec middleman build && bundle exec middleman deploy
 env:
   global:
   - secure: YZlMVMMZ9fLE4enTCfoaeajmbcCbnECe6v3FmkhKx4K/AMp3fkSk+bYOl/rfCf7hXKV4Fk1MUCU6X/gz93P/DpW88R9Dr+7iFsJpVJd5+by7xFcHri1j22eTJ0ODgxyGcDZoSYzlVbecO1sYgTFsmNO1v4Lhyx7ALjBAEKH1aAM=

Gemfile.lock

@@ -1,21 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.1.14.1)
-      i18n (~> 0.6, >= 0.6.9)
+    activesupport (4.2.5.1)
+      i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
-      thread_safe (~> 0.1)
+      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.7)
+    addressable (2.3.8)
     builder (3.2.2)
-    celluloid (0.16.0)
-      timers (~> 4.0.0)
-    chunky_png (1.3.3)
-    coffee-script (2.3.0)
+    capybara (2.4.4)
+      mime-types (>= 1.16)
+      nokogiri (>= 1.3.3)
+      rack (>= 1.0.0)
+      rack-test (>= 0.5.4)
+      xpath (~> 2.0)
+    chunky_png (1.3.5)
+    coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.9.0)
+    coffee-script-source (1.10.0)
     compass (1.0.3)
       chunky_png (~> 1.2)
       compass-core (~> 1.0.2)
@@ -33,50 +37,48 @@ GEM
       http_parser.rb (~> 0.6.0)
     erubis (2.7.0)
     eventmachine (1.0.9.1)
-    execjs (2.3.0)
+    execjs (2.6.0)
     ffi (1.9.10)
-    haml (4.0.6)
+    haml (4.0.7)
       tilt
     hike (1.2.3)
-    hitimes (1.2.3)
     hooks (0.4.1)
       uber (~> 0.0.14)
     http_parser.rb (0.6.0)
-    httparty (0.13.4)
+    httparty (0.13.7)
       json (~> 1.8)
       multi_xml (>= 0.5.2)
     i18n (0.7.0)
     json (1.8.3)
-    kramdown (1.5.0)
-    listen (2.10.1)
-      celluloid (~> 0.16.0)
+    kramdown (1.9.0)
+    listen (3.0.5)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
-    middleman (3.3.8)
+    middleman (3.4.1)
       coffee-script (~> 2.2)
       compass (>= 1.0.0, < 2.0.0)
       compass-import-once (= 1.0.5)
       execjs (~> 2.0)
       haml (>= 4.0.5)
       kramdown (~> 1.2)
-      middleman-core (= 3.3.8)
+      middleman-core (= 3.4.1)
       middleman-sprockets (>= 3.1.2)
       sass (>= 3.4.0, < 4.0)
       uglifier (~> 2.5)
     middleman-blog (3.5.3)
       addressable (~> 2.3.5)
       middleman-core (~> 3.2)
       tzinfo (>= 0.3.0)
-    middleman-core (3.3.8)
-      activesupport (~> 4.1.0)
+    middleman-core (3.4.1)
+      activesupport (~> 4.1)
       bundler (~> 1.1)
+      capybara (~> 2.4.4)
       erubis
       hooks (~> 0.3)
       i18n (~> 0.7.0)
-      listen (>= 2.7.9, < 3.0)
+      listen (~> 3.0.3)
       padrino-helpers (~> 0.12.3)
       rack (>= 1.4.5, < 2.0)
-      rack-test (~> 0.6.2)
       thor (>= 0.15.2, < 2.0)
       tilt (~> 1.4.1, < 2.0)
     middleman-deploy (1.0.0)
@@ -90,27 +92,33 @@ GEM
     middleman-search_engine_sitemap (1.3.0)
       builder
       middleman-core (~> 3.2)
-    middleman-sprockets (3.4.1)
+    middleman-sprockets (3.4.2)
       middleman-core (>= 3.3)
       sprockets (~> 2.12.1)
       sprockets-helpers (~> 1.1.0)
       sprockets-sass (~> 1.3.0)
-    middleman-syntax (2.0.0)
-      middleman-core (~> 3.2)
+    middleman-syntax (2.1.0)
+      middleman-core (>= 3.2)
       rouge (~> 1.0)
+    mime-types (3.0)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2015.1120)
+    mini_portile2 (2.0.0)
     minitest (5.8.4)
-    multi_json (1.10.1)
+    multi_json (1.11.2)
     multi_xml (0.5.5)
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
-    net-ssh (2.9.2)
+    net-ssh (3.0.2)
+    nokogiri (1.6.7.2)
+      mini_portile2 (~> 2.0.0.rc2)
     padrino-helpers (0.12.5)
       i18n (~> 0.6, >= 0.6.7)
       padrino-support (= 0.12.5)
       tilt (~> 1.4.1)
     padrino-support (0.12.5)
       activesupport (>= 3.1)
-    ptools (1.3.2)
+    ptools (1.3.3)
     rack (1.6.4)
     rack-livereload (0.3.16)
       rack
@@ -119,10 +127,10 @@ GEM
     rb-fsevent (0.9.7)
     rb-inotify (0.9.5)
       ffi (>= 0.5.0)
-    redcarpet (3.2.2)
-    rouge (1.8.0)
-    sass (3.4.12)
-    sprockets (2.12.3)
+    redcarpet (3.3.4)
+    rouge (1.10.1)
+    sass (3.4.21)
+    sprockets (2.12.4)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
@@ -135,14 +143,14 @@ GEM
     thor (0.19.1)
     thread_safe (0.3.5)
     tilt (1.4.1)
-    timers (4.0.4)
-      hitimes
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
     uber (0.0.15)
-    uglifier (2.7.0)
+    uglifier (2.7.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
+    xpath (2.0.0)
+      nokogiri (~> 1.3)
 
 PLATFORMS
   ruby

bundle/ruby/2.3.0/bin/nokogiri

@@ -0,0 +1,23 @@
+#!/usr/bin/env ruby
+#
+# This file was generated by RubyGems.
+#
+# The application 'nokogiri' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+require 'rubygems'
+
+version = ">= 0.a"
+
+if ARGV.first
+  str = ARGV.first
+  str = str.dup.force_encoding("BINARY") if str.respond_to? :force_encoding
+  if str =~ /\A_(.*)_\z/ and Gem::Version.correct?($1) then
+    version = $1
+    ARGV.shift
+  end
+end
+
+gem 'nokogiri', version
+load Gem.bin_path('nokogiri', 'nokogiri', version)