.travis.yml

language: node_js
sudo: false

# This is one of the node versions that's pre-installed on Travis
node_js: "8.9.1"

os:
  - linux
  - osx

env:
  global:
    - ELM_VERSION=0.19.0
    - ELM_FORMAT_VERSION=0.8.0
    - ELM_TEST_VERSION=0.19.0-beta5
    - ELM_HOME=.travis-elm-home

cache:
  directories:
    - .travis-elm-home
    - .sysconfcpus
    - .elm-bin
    - .node-global

before_install:
  - mkdir -p .node-global
  - npm config set prefix .node-global
  - export PATH=.node-global/bin:.elm-bin/elm/$ELM_VERSION:.elm-bin/elm-format/$ELM_FORMAT_VERSION:$PATH
  - echo -e "Host github.com\n\tStrictHostKeyChecking no\n" >> ~/.ssh/config
  - | # epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
    if [ ! -d .sysconfcpus/bin ];
    then
      git clone https://github.com/obmarg/libsysconfcpus.git .libsysconfcpus;
      cd .libsysconfcpus;
      ./configure --prefix=$TRAVIS_BUILD_DIR/.sysconfcpus;
      make && make install;
      cd ..;
    fi


install:
  - | # install elm if it's not already installed from cache
    if [ ! -d .elm-bin/elm/$ELM_VERSION ];
    then
      set -e
      wget -qO- https://github.com/elm/compiler/releases/download/$ELM_VERSION/binaries-for-linux.tar.gz | tar xvz
      if [ ! -f elm ]; then
          echo "Downloading and installing elm failed."
          travis_terminate 2
      fi
      mkdir -p .elm-bin/elm/$ELM_VERSION
      mv elm .elm-bin/elm/$ELM_VERSION
      pushd .elm-bin/elm/$ELM_VERSION
      mv elm elm-old
      printf '%s\n\n' '#!/bin/bash' 'echo "Running elm with sysconfcpus -n 1"' '$TRAVIS_BUILD_DIR/.sysconfcpus/bin/sysconfcpus -n 1 elm-old "$@"' > elm
      chmod +x elm
      popd
    fi
  - | # install elm-format if it's not already installed from cache
    if [ ! -d .elm-bin/elm-format/$ELM_FORMAT_VERSION ];
    then
      set -e
      wget -qO- https://github.com/avh4/elm-format/releases/download/$ELM_FORMAT_VERSION/elm-format-0.19-$ELM_FORMAT_VERSION-linux-x64.tgz | tar xvz
      if [ ! -f elm-format ]; then
          echo "Downloading and installing elm-format failed."
          travis_terminate 2
      fi
      mkdir -p .elm-bin/elm-format/$ELM_FORMAT_VERSION
      mv elm-format .elm-bin/elm-format/$ELM_FORMAT_VERSION
    fi
  - | # Always install elm-test from scratch. It would be great if we could detect the version and cache it somehow.
    npm install --global elm-test@$ELM_TEST_VERSION

script:
  - elm-format --validate .
  - elm make
  - elm-test