Restore deleted before_install

bin/before_install

@@ -4,6 +4,39 @@ if [ -n "$CI" ]; then
   echo "== Installing system packages =="
   sudo apt-get install libcurl4-openssl-dev
   echo
+
+  # Install Qpid proton system library
+  set -v
+  pushd $PWD
+
+    # Install the dev dependencies for building Qpid proton system library.
+    sudo apt-get install -y gcc cmake cmake-curses-gui uuid-dev
+    sudo apt-get install -y libssl-dev
+    sudo apt-get install -y libsasl2-2 libsasl2-dev
+
+    # Get the latest Qpid Proton source
+    cd $HOME/build
+    git clone --branch 0.30.0 https://github.com/apache/qpid-proton.git
+    cd qpid-proton
+
+    # Configure the source of Qpid Proton.
+    mkdir build
+    cd build
+    cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DBUILD_BINDINGS=
+
+    # Compile system libraries.
+    make all
+
+    # Install system libraries
+    sudo make install
+
+    # Enable the qpid_proton bundler group
+    [ -z "$BUNDLE_WITH" ] && bundle config with qpid_proton
+
+  popd
+  set +v
+
+  echo
 fi
 
 gem_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." &>/dev/null && pwd)"