remove sudo from Travis in order to use containers, see #427

.travis.yml

@@ -4,14 +4,22 @@ env:
     - GHCVER=7.10.2 TEST_PART=PROFILING
     - GHCVER=7.10.2 TEST_PART=GHCJS
 
+addons:
+    apt:
+        sources:
+            - hvr-ghc
+        packages:
+            - build-essential
+            - nodejs
+            - cabal-install-1.22
+            - ghc-7.10.2
+            - alex-3.1.4
+            - happy-1.19.5
+
 before_install:
     - export GHCJS_BOOTING=1
     - export GHCJS_BOOTING_STAGE1=1
-    - travis_retry sudo add-apt-repository -y ppa:hvr/ghc
-    - curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
-    - travis_retry sudo apt-get update -qq
-    - travis_retry sudo apt-get build-dep ghc
-    - travis_retry sudo apt-get install nodejs cabal-install-1.22 ghc-$GHCVER alex-3.1.4 happy-1.19.5
+    - nvm install 4
     - export PATH=$HOME/.cabal/bin:/opt/ghc/$GHCVER/bin:/opt/cabal/1.22/bin:/opt/alex/3.1.4/bin:/opt/happy/1.19.5/bin:$PATH
 
 install:
@@ -31,3 +39,5 @@ notifications:
     channels: "irc.freenode.net#ghcjs"
     skip_join: true
   email: true
+
+sudo: false

test/runTravis.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-NODE="nodejs"
+NODE="node"
 PART="$TEST_PART"
 CABAL="cabal"
 GHCJSBOOT="ghcjs-boot"