Travis CI: Drop custom caching.

.travis.yml

@@ -3,16 +3,16 @@
     "language": "node_js",
     "node_js": ["6"],
     "before_install": [
-        "travis_retry pip install -r test-infra/requirements.txt --user",
+        # Remove ./node_modules/.bin from PATH so node-which doesn't replace Unix which and cause RVM to barf. See https://github.com/travis-ci/travis-ci/issues/5092
+        "export PATH=$(python -c 'from sys import argv;from collections import OrderedDict as od;print(\":\".join(od((p,None) for p in argv[1].split(\":\") if p.startswith(\"/\")).keys()))' \"$PATH\")",
         "rvm install 2.2",
-        "rvm use 2.2 --fuzzy",
-        "export GEMDIR=$(rvm gemdir)",
-        "echo \"ruby=$(basename $GEMDIR) jekyll=$JEKYLL_VERSION\" > pseudo_Gemfile.lock"
+        "rvm use 2.2 --fuzzy"
     ],
     "install": [
+        "cp test-infra/npm-shrinkwrap.json ./",
         "npm install -g grunt-cli",
-        "./test-infra/s3_cache.py download npm-modules",
-        "./test-infra/s3_cache.py download rubygems"
+        "npm install",
+        "bundle install --without development --deployment --jobs=3"
     ],
     "before_script": [
         "git clone --depth 1 https://github.com/twbs/bootstrap.git",
@@ -26,16 +26,12 @@
         "diff test/fixtures/cli/x-ua-compatible-missing.output.txt x-ua-compatible-missing.output.actual.txt"
     ],
     "after_script": [
-        "npm run coveralls",
-        "./test-infra/s3_cache.py upload npm-modules",
-        "./test-infra/s3_cache.py upload rubygems"
+        "npm run coveralls"
     ],
-    "env": {
-        "global": [
-            {"JEKYLL_VERSION": "3.1.2"},
-            {"secure": "dRdiG/5UykFAVW6GWWcaNHGSPy16PiCeF9XySPDdCSbw+pI2zqE8VNyXgn1kORhLFsKjdIQaLnmFWR1Xw7sP59zpnIRUkZ77spw7hKNf1RlAv3uckE8LFxO1FkMFNOlSHgmCXnyseUNGMDL/lIBMCLfsTOlc6KvbQir7pz+TDwM="},
-            {"secure": "Ej9x2sBilYq9Wr86j7NujcPN0qAMHgUzjB9tX0vN90nKOPfAmWWcO9omFzwkuH0VZkZmauK/YQlEqKhx99quVwRHctu0LhZRnBgaCnsGp6CnRorFW4IKZwJSM38BF9XXvCCnQtz6PyItpE+ycbpFI0MHvs0H3BXFmwifvY/Q4/Y="},
-            {"secure": "Oq9mxJduZiy0oZmKlg3kkFFWlBTuCynRpZoz0SyG3hHt2uipWfXlm0AlpcjU6jB6g8kNtGF4ZA5uGiMUePSOfK0RveYQa95ixUY6VrbuAIzdDtz/rbMajtGCVpMBgOf5o33rEfocwgADE/i1lE1JJeNjdUBsO1Iyron1ZiT52mE="}
+    "cache": {
+        "directories": [
+            "node_modules",
+            "vendor/bundle"
         ]
     }
 }

Gemfile

@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+
+group :development, :test do
+    gem 'jekyll', '~> 3.1.2'
+end

Gemfile.lock

@@ -0,0 +1,39 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    colorator (0.1)
+    ffi (1.9.10-x64-mingw32)
+    jekyll (3.1.2)
+      colorator (~> 0.1)
+      jekyll-sass-converter (~> 1.0)
+      jekyll-watch (~> 1.1)
+      kramdown (~> 1.3)
+      liquid (~> 3.0)
+      mercenary (~> 0.3.3)
+      rouge (~> 1.7)
+      safe_yaml (~> 1.0)
+    jekyll-sass-converter (1.4.0)
+      sass (~> 3.4)
+    jekyll-watch (1.3.1)
+      listen (~> 3.0)
+    kramdown (1.10.0)
+    liquid (3.0.6)
+    listen (3.0.6)
+      rb-fsevent (>= 0.9.3)
+      rb-inotify (>= 0.9.7)
+    mercenary (0.3.5)
+    rb-fsevent (0.9.7)
+    rb-inotify (0.9.7)
+      ffi (>= 0.5.0)
+    rouge (1.10.1)
+    safe_yaml (1.0.4)
+    sass (3.4.21)
+
+PLATFORMS
+  x64-mingw32
+
+DEPENDENCIES
+  jekyll (~> 3.1.2)
+
+BUNDLED WITH
+   1.11.2