From 10a3ee3f49bce0563475cfb7aaea981eaf61b49c Mon Sep 17 00:00:00 2001
From: Hanzhou Shi <hanzhou87@gmail.com>
Date: Fri, 12 May 2017 21:43:52 -0700
Subject: [PATCH] adding travis configuration for swift under linux

---
 .travis.yml                           |  5 +++++
 .travis/before-install-linux-swift.sh | 19 +++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100755 .travis/before-install-linux-swift.sh

diff --git a/.travis.yml b/.travis.yml
index 25dc7ece7..850e979fd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -36,6 +36,11 @@ matrix:
       compiler: clang
       osx_image: xcode8.1
       env: TARGET=swift
+    - os: linux
+      compiler: clang
+      env:
+        - TARGET=swift
+        - SWIFT_VERSION=swift-3.1.1
     - os: osx
       osx_image: xcode8.2
       env: TARGET=dotnet
diff --git a/.travis/before-install-linux-swift.sh b/.travis/before-install-linux-swift.sh
new file mode 100755
index 000000000..b5566b65b
--- /dev/null
+++ b/.travis/before-install-linux-swift.sh
@@ -0,0 +1,19 @@
+set -euo pipefail
+
+# download swift
+mkdir swift
+curl https://swift.org/builds/$SWIFT_VERSION-release/ubuntu1404/$SWIFT_VERSION-RELEASE/$SWIFT_VERSION-RELEASE-ubuntu14.04.tar.gz -s | tar xz -C swift &> /dev/null
+
+# install dependencies
+sudo apt-get install clang libicu52
+
+# update libstdc++6, travis uses some old version
+echo "\n" | sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+sudo apt-get update
+sudo apt-get install gcc-4.9
+sudo apt-get install libstdc++6
+
+# check swift
+export PATH=$(pwd)/swift/$SWIFT_VERSION-RELEASE-ubuntu14.04/usr/bin:$PATH
+swift --version
+swift build --version