Merge branch 'enable-websockets-support-on-ci'

* enable-websockets-support-on-ci:
  Compile Mosquitto with Websockets support

.travis.yml

@@ -10,11 +10,22 @@ matrix:
       elixir: 1.6.0
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get -y install libc-ares-dev libssl-dev uuid-dev
+  - sudo apt-get -y install libc-ares-dev libssl-dev uuid-dev cmake
+  - wget https://github.com/warmcat/libwebsockets/archive/v3.0.0.tar.gz -O libwebsockets-3.0.0.tar.gz
   - wget http://mirror.switch.ch/eclipse/mosquitto/source/mosquitto-1.4.12.tar.gz
 install:
+  - tar xvzf libwebsockets-3.0.0.tar.gz
+  - cd libwebsockets-3.0.0
+  - mkdir build
+  - cd build
+  - cmake .. -DOPENSSL_ROOT_DIR=/usr/bin/openssl
+  - make
+  - sudo make install
+  - sudo ldconfig
+  - cd ../..
   - tar xvzf mosquitto-1.4.12.tar.gz
   - cd mosquitto-1.4.12
+  - sed -i "s/WITH_WEBSOCKETS:=.*/WITH_WEBSOCKETS:=yes/" config.mk
   - make
   - sudo make install
   - cd ..