Add swiftlint install script

diff --git a/Scripts/install_swiftlint.sh b/Scripts/install_swiftlint.sh
new file mode 100755 (executable)
index 0000000..6a2f250
--- /dev/null
+++ b/Scripts/install_swiftlint.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Taken from: https://alexplescan.com/posts/2016/03/03/setting-up-swiftlint-on-travis-ci/
+
+# 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/0.18.1/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