Auto merge of #7915 - frewsxcv:travis, r=larsbergstrom

Build Servo on Travis

Closes #6962

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7915)
<!-- Reviewable:end -->

.travis.yml

@@ -1,9 +1,25 @@
 language: python
-sudo: false
+sudo: 9000
+services:
+  - docker
+
+before_install:
+  - if [ "$DOCKER" = "1" ]; then docker build -t servo etc/ci/; fi
 
 script:
- - ./mach test-tidy
+  - if [ "$DOCKER" = "0" ]; then sh -c "$CMD"; fi
+  - if [ "$DOCKER" = "1" ]; then docker run -tv `pwd`:/build servo sh -c "$CMD"; fi
+
+matrix:
+  fast_finish: true
+  include:
+    - env:
+      - CMD="./mach test-tidy"
+      - DOCKER=0
+    - env:
+      - CMD="./mach build -d --verbose"
+      - DOCKER=1
 
 branches:
   only:
-    - master
+    - master

etc/ci/Dockerfile

@@ -0,0 +1,33 @@
+FROM ubuntu:vivid
+
+# Required by mozjs to build
+ENV SHELL /bin/sh
+
+# Enable 'universe' since it is not enabled by default
+RUN echo "deb http://archive.ubuntu.com/ubuntu vivid main universe" > /etc/apt/sources.list
+RUN echo "deb http://archive.ubuntu.com/ubuntu vivid-updates main universe" >> /etc/apt/sources.list
+
+# Install dependencies
+RUN apt-get -y update
+RUN apt-get install -y \
+    cmake \
+    curl \
+    freeglut3-dev \
+    g++ \
+    git \
+    gperf \
+    libbz2-dev \
+    libfreetype6-dev \
+    libgl1-mesa-dri \
+    libglib2.0-dev \
+    libglu1-mesa-dev \
+    libosmesa6-dev \
+    libssl-dev \
+    libxmu-dev \
+    libxmu6 \
+    python-virtualenv \
+    xorg-dev
+
+# Servo will be built in /build
+RUN mkdir /build
+WORKDIR /build