Diffux on CircleCI sketch

.diffux_ci-new.yaml

source_files:
 - http://localhost:8080/diffux.js # For convenience, for use with webpack server. Is ignored on CircleCI.
 - diffux-new.js
snapshots_folder: ./diffux_snapshots

.diffux_ci-old.yaml

source_files:
 - diffux-old.js
snapshots_folder: ./diffux_snapshots

README.md

This is a super hacky-patchy-sketchy version of how far I've gotten with setting up Diffux on CircleCI.

We use Webpack that outputs a file like public/client/1.diffux.0198u2j129832hjf3.js or something so I copy it to ./diffux-old.js and ./diffux-new.js. I also have two yaml files for both runs -- it would be great if we can instead just pass those files as command line options to Diffux. There's also a bug in Diffux, see a comment in circle.yml.

Also, the first couple of lines of circle.yml are not super relevant but I kept them in there as it was stuff I ran into in the last few months so figured it might be useful for you too.

circle.yml

machine:
  ruby:
    version: 2.2.4
  node:
    version: 5.5.0 # Latest on https://circleci.com/docs/build-image-precise/#nodejs
checkout:
  post:
    - npm install -g npm # See https://discuss.circleci.com/t/wrong-npm-version-with-node-5-0-5-1/827
    - cp .env.sample .env
dependencies:
  post:
    # Get previous master build for diffux.
    - git checkout `git merge-base HEAD origin/diffux-wip`
    - npm run build
    - cp public/client/*diffux*.js ./diffux-old.js 
    - rm public/client/* 
    - git checkout -

    # Regular build
    - npm run build # Without WEBPACK_MINIFY, as we want warnings to show up in tests.
    - cp public/client/*diffux*.js ./diffux-new.js # Also copy new Diffux file.
test:
  override:
    - bundle exec rspec --format RspecJunitFormatter --out $CIRCLE_TEST_REPORTS/rspec.xml:
        parallel: true
        files:
          - spec/**/*_spec.rb
    - npm test

    # Run Diffux on diffux-old.js (set in .diffux_ci-old.yaml)
    - DIFFUX_CI_CONFIG_FILE=.diffux_ci-old.yaml bundle exec diffux
    # Run Diffux on diffux-new.js (set in .diffux_ci-new.yaml)
    - DIFFUX_CI_CONFIG_FILE=.diffux_ci-new.yaml bundle exec diffux
    # Copy snapshots so we can access them.
    # (Will have to fix https://github.com/diffux/diffux_ci/issues/76 for this to work properly…)
    - cp -r diffux_snapshots $CIRCLE_ARTIFACTS/