Add .travis.yml

Author: Richard Feldman

.travis.yml

@@ -0,0 +1,38 @@
+sudo: false
+
+cache:
+  directories:
+    - tests/elm-stuff/build-artifacts
+    - sysconfcpus
+
+before_install:
+  - echo -e "Host github.com\n\tStrictHostKeyChecking no\n" >> ~/.ssh/config
+  - | # epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
+    if [ ! -d sysconfcpus/bin ];
+    then
+      git clone https://github.com/obmarg/libsysconfcpus.git;
+      cd libsysconfcpus;
+      ./configure --prefix=$TRAVIS_BUILD_DIR/sysconfcpus;
+      make && make install;
+      cd ..;
+    fi
+
+
+install:
+  - nvm install $TARGET_NODE_VERSION
+  - nvm use $TARGET_NODE_VERSION
+  - node --version
+  - npm --version
+  - npm install -g elm@0.18.0 elm-test elm-format@exp
+  - mv $(npm config get prefix)/bin/elm-make $(npm config get prefix)/bin/elm-make-old
+  - printf '%s\n\n' '#!/bin/bash' 'echo "Running elm-make with sysconfcpus -n 2"' '$TRAVIS_BUILD_DIR/sysconfcpus/bin/sysconfcpus -n 2 elm-make-old "$@"' > $(npm config get prefix)/bin/elm-make
+  - chmod +x $(npm config get prefix)/bin/elm-make
+  - travis_retry elm-package install --yes
+  - cd tests
+  - npm install
+  - travis_retry elm-package install --yes
+  - cd ..
+
+script:
+  - elm-format --validate src tests
+  - cd ..