.travis.yml

#
# For deployment to a github repo set following environment variables:
# - DEPLOY_REPO_SLUG
# - DEPLOY_REPO_KEY
# Set them in travis-ci.org dashboard or by using the travis CLI.
# For DEPLOY_REPO_KEY escape spaces as "\ " and newlines as "\\n"
#     Example bash command, using awk and sed:
#         cat private_key_file | awk 1 ORS='\\\\n' | sed 's/ /\\ /g'
#     See http://stackoverflow.com/questions/1251999/how-can-i-replace-a-newline-n-using-sed


sudo: false

language: node_js

node_js:
  - "7.7.3"

cache:
  directories:
    # - tests/elm-stuff/build-artifacts
    - elm-stuff/build-artifacts
    - sysconfcpus
    - node_modules

before_install:
  - |
    # Install sysconfcpus to avoid long build times.
    #     (Elm compiler slows dramatically when number of CPUs is incorrectly reported.)
    #     https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
    # This tools
    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:
  - npm install -g elm@0.18.0
  - npm install
  - mv $(npm config get prefix)/bin/elm-make $(npm config get prefix)/bin/elm-make-org
  - printf '%s\n\n' '#!/bin/bash' 'echo "Running elm-make with sysconfcpus -n 2"' '$TRAVIS_BUILD_DIR/sysconfcpus/bin/sysconfcpus -n 2 elm-make-org "$@"' > $(npm config get prefix)/bin/elm-make
  - chmod +x $(npm config get prefix)/bin/elm-make
  - travis_retry elm-package install --yes

before_script:
  # Test compilation of Elm code
  - elm make --yes --output /dev/null src/Main.elm

script:
  - npm run build

after_success:
  - | # Deploy to gh-pages
    #
    # Some resources:
    # - https://gist.github.com/domenic/ec8b0fc8ab45f39403dd
    # - http://stackoverflow.com/questions/23277391/how-to-publish-to-github-pages-from-travis-ci
    #
    if [ -n "$DEPLOY_REPO_SLUG" -a -n "$DEPLOY_REPO_KEY" -a "$TRAVIS_PULL_REQUEST" = "false" -a "$TRAVIS_BRANCH" = master ];
    then
      #
      eval `ssh-agent -s`
      echo -e $DEPLOY_REPO_KEY | ssh-add -
      #
      # As a SPA on gh-pages: Redirect all URLs to index.html
      ln -s index.html dist/404.html
      #
      #
      # Use email and name from last source repo commit for deployment commit.
      git config --global user.email $(git show --format="%aE" -s)
      git config --global user.name "$(git show --format="%aN" -s) - Travis CI"
      git config --global push.default current
      # 
      # Get current deployment repo (which must exist beforehand)
      git clone --depth=1 --branch=master git@github.com:$DEPLOY_REPO_SLUG.git _deployment_clone
      # Commit and push the new build to deployment repo
      mv _deployment_clone/.git/ dist/
      rm -rf _deployment_clone
      cd dist
      touch README.md
      echo "Built from https://github.com/$TRAVIS_REPO_SLUG" >> README.md
      echo "" >> README.md
      echo "By Travis CI https://travis-ci.org/$TRAVIS_REPO_SLUG/builds/$TRAVIS_BUILD_ID" >> README.md
      git add --all .
      git commit -m "Travis build $TRAVIS_BUILD_NUMBER of $TRAVIS_REPO_SLUG ${TRAVIS_COMMIT:0:7}" -m "Source: https://github.com/$TRAVIS_REPO_SLUG/commit/$TRAVIS_COMMIT"
      git push origin
      cd ..
    fi


# We don't use Travis' builtin gh-pages deployment method, which has these drawbacks:
# - Needs a GitHub auth token, unnecessarily granting access to all repos of the user.
# - Overwrites the target repo branch without preserving git history.
#
# deploy:
#   skip_cleanup: true
#   provider: pages
#   github_token: $GITHUB_TOKEN # Set in travis-ci.org dashboard
#   local_dir: dist
#   repo: $DEPLOY_REPO_SLUG
#   target_branch: travis-direct-deploy
#   on:
#     branch: master