Adding swiftlint yo.

.travis.yml

@@ -6,7 +6,10 @@ before_install:
 - export TZ=America/Los_Angeles
 before_script:
  - xcodebuild -version
+install:
+ - ./swiftlint-install.sh
 script:
  - set -o pipefail && env "NSUnbufferedIO=YES"
+ - swiftlint
  - xcodebuild -project Clocker/Clocker.xcodeproj -scheme Clocker build analyze CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO CODE_SIGN_IDENTITY= | xcpretty
  - xcodebuild -project Clocker/Clocker.xcodeproj -scheme Clocker test CODE_SIGNING_REQUIRED=NO CODE_SIGNING_ALLOWED=NO CODE_SIGN_IDENTITY=  | xcpretty

swiftlint-install.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Installs the SwiftLint package.
+# Tries to get the precompiled .pkg file from Github, but if that
+# fails just recompiles from source.
+
+set -e
+
+SWIFTLINT_PKG_PATH="/tmp/SwiftLint.pkg"
+SWIFTLINT_PKG_URL="https://github.com/realm/SwiftLint/releases/download/0.9.1/SwiftLint.pkg"
+
+wget --output-document=$SWIFTLINT_PKG_PATH $SWIFTLINT_PKG_URL
+
+if [ -f $SWIFTLINT_PKG_PATH ]; then
+  echo "SwiftLint package exists! Installing it..."
+  sudo installer -pkg $SWIFTLINT_PKG_PATH -target /
+else
+  echo "SwiftLint package doesn't exist. Compiling from source..." &&
+  git clone https://github.com/realm/SwiftLint.git /tmp/SwiftLint &&
+  cd /tmp/SwiftLint &&
+  git submodule update --init --recursive &&
+  sudo make install
+fi