Add travis yaml

.gitignore

@@ -1,3 +1,4 @@
+build/
 CMakeCache.txt
 CMakeFiles
 CMakeScripts

.travis.yml

@@ -0,0 +1,52 @@
+# Source: https://github.com/boostorg/hana/blob/master/.travis.yml
+
+# Sudo is required for installing recent versions of dependencies.
+sudo: required
+
+# Use C++ build environment.
+language: cpp
+
+# Protobuf requires g++ (see https://github.com/google/protobuf/blob/master/src/README.md)
+compiler:
+    - gcc
+
+# Cache dependencies to speed up the build.
+cache:
+    directories:
+        - ${TRAVIS_BUILD_DIR}/deps/cmake
+        - ${TRAVIS_BUILD_DIR}/deps/protobuf
+
+# Handle dependencies in separate directory.
+before_install:
+    - DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
+    - mkdir -p "${DEPS_DIR}"
+    - cd "${DEPS_DIR}"
+
+install:
+    # Install a recent version of CMake
+    - |
+        CMAKE_URL="https://cmake.org/files/v3.7/cmake-3.7.2-Linux-x86_64.tar.gz"
+        mkdir -p cmake
+        travis_retry wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
+        export PATH=${DEPS_DIR}/cmake/bin:${PATH}
+
+    # Install a recent version of the Protobuf
+    - |
+        PROTOBUF_URL="https://github.com/google/protobuf/releases/download/v3.2.0/protobuf-cpp-3.2.0.tar.gz"
+        mkdir -p protobuf
+        travis_retry wget --no-check-certificate --quiet -O - ${PROTOBUF_URL} | tar --strip-components=1 -xz -C protobuf
+        cd protobuf
+        ./configure --prefix=/usr
+        make
+        sudo make install
+
+# Change directory back to default build directory.
+before_script:
+    - cd "${TRAVIS_BUILD_DIR}"
+
+# Run the build script.
+script:
+    - mkdir -p build
+    - cd build
+    - cmake ..
+    - cmake --build .