build: initial .travis.yml implementation

Refs: ayojs/ayo#14
Refs: ayojs/ayo#75
Co-authored-by: Jeremiah Senkpiel <fishrock123@rocketmail.com>

.gitignore

@@ -14,6 +14,7 @@
 !.mailmap
 !.nycrc
 !.remarkrc
+!.travis.yml
 
 core
 vgcore.*

.travis.yml

@@ -0,0 +1,30 @@
+language: cpp
+compiler:
+  - clang
+sudo: false
+cache: ccache
+matrix:
+  include:
+    - os: linux
+      node_js: "8"
+      script:
+        - NODE=$(which node) make lint-ci
+    - os: linux
+      install:
+        - ./configure
+        - make -j2 V=
+      script:
+        - make -j2 test-ci
+    - os: osx
+      install:
+        - ./configure
+        - make -j2 V=
+      script:
+        - make -j2 test-ci
+before_install:
+  - export HOMEBREW_NO_AUTO_UPDATE=1 # work around https://github.com/travis-ci/travis-ci/issues/7456
+  - if [ $TRAVIS_OS_NAME = osx ]; then brew install ccache; fi
+  - export PATH="/usr/local/opt/ccache/libexec:$PATH"
+  - export CXX="ccache clang++ -Qunused-arguments"
+  - export CC="ccache clang -Qunused-arguments"
+  - export JOBS=2