* Correctly lookup assets when using a relative build directory

* Hah, var ...

* Add e2e test for relative paths

* Format svg

* Run smoke tests with Jest

* Get a unique port for smoke test

* Upgrade verdaccio across the board

* Drop unneeded step

* Try latest instead

* Boot registry in home directory

* Correct config path

* Add mutex

* Test webpack message formatting

* Strip color

* Add browserslist to default

* Disable another broken feature

* Add new behavior e2e test script

* Add output for transparency

- [x] Utilize webpack 4 development and production modes
- [x] Upgrade webpack dev server
- [x] Webpack 4 compatible release of thread-loader
- [x] Webpack 4 compatible release of HtmlWebpackPlugin
- [x] Webpack 4 compatible release of SwPrecacheWebpackPlugin
- [x] Webpack 4 compatible release of WebpackManifestPlugin
- [x] Update README
- [x] Update WebpackDevServerUtils
- [x] Update InterpolateHtmlPlugin
- [x] Update ModuleScopePlugin
- [x] Update WatchMissingNodeModulesPlugin
- [x] Move UglifyJS options to webpack 4 optimize
- [x] Move InterpolateHtmlPlugin to make it tapable on HtmlWebpackPlugin
- [x] vendor splitting via splitChunks.splitChunks (https://twitter.com/wSokra/status/969633336732905474)
- [x] long term caching via splitChunks.runtimeChunk (https://twitter.com/wSokra/status/969679223278505985)
- [x] Make sure process.env.NODE_ENV is proxied correctly to `react-error-overlay`
- [x] Implicit webpack.NamedModulesPlugin in dev config as its default in webpack 4
- [x] Disable webpack performance hints as we have our own filesize reporter
- [x] Replace ExtractTextPlugin with MiniCssExtractPlugin
- [x] Switch to css whole file minification via OptimizeCSSAssetsPlugin rather than per module css minification to gain performance

* Add svg rendering for error example

* Use static svg error example

* Automate screencast recordings
* **screencast.js**: Automate screencast.sh, asciinema, svg-term-cli. Removes progress-bar, npm tree data from cast
* **screencast.sh**: Simulate user input, trigger demoed commands
* **screencast-start.js**: Start a shell command and end the process log patterns have been observed

Add preflight check to guard against wrong versions of webpack/eslint/jest higher up the tree (#3771)

* Run real scripts in local development

* Add preflight check warning

* I know what I am doing

* Move preflight check into individual scripts

This ensures we don't try to filter NODE_PATH twice, accidentally removing the now-absolute path.

* Slightly tweak the wording

* Fix lint

* Switch to Yarn Workspaces

* Feedback

* Move flowconfig

* Use publish script

* Keep git status check

* Fix Flow without perf penalty

* Remove Flow from package.json "test"

* Try running it from script directly (?)

* Try magic incantations

* lol flow COME ON

* Try to skip Flow on AppVeyor

* -df

* -df

* -df

* Try to fix CI

* Revert unrelated changes

* Update CONTRIBUTING.md

* Port cra.sh development task to javascript

* Port cra.sh development task to javascript

Use absolute path when generating .tgz path

* Add svg screencast

* Use svg screencast

* rerun prettier for all files

* pin prettier to 1.6.1

* Bump deps

* Fix linter errors

* Whoops

* Try to bump webpack

* Update peer deps to min for eslint 4.x

Since yarn.lock shouldn't be added to the repo, nor excluded via
.gitignore, lets take advantage of lint-staged to remove any staged
yarn.lock files before they can even be committed.

* Bootstrap with Yarn if we can

* Update test scripts

* Check OS and npm concurrency ability

* Windows support

* Update bootstrap.js

* Install yarn before bootstrap

* Update Prettier to v1

* Update package.json

* Local testing with docker

* Docs on e2e testing

* `bash` callback after docker

* Add a TL;DR in the CONTRIBUTING section

* Local e2e testing with modified files

* Remove the N.B. from the README

* Fixed a fixme in e2e doc

* Bump dependencies

* Bump CSS deps

* Somehow I missed dotenv

* Bump ESLint deps

* Tweak ESLint rules

* ༼ つ ◕_◕ ༽つ stack-frame-overlay

* Fix linting

* Remove auto overlay

* Fix e2e

* Pull in the rest

* Appease flow

* Correct dep

* Remove old repo references

* Check flow on test

* Test overlay in e2e

* Add cross env

* Rename package

* Make sure it gets built post-install

* Update the README

* Remove extra builds now that there's a postinstall script

* Revert "Remove extra builds now that there's a postinstall script"

This reverts commit 8bf601db.

* Remove broken script

* Fix some dev ergo

* mv create-react-app/index.js -> create-react-app/creteReactApp.js

* update to modern code style

* var -> cosnt

* set trailing-coma to es5 for prettier

* Lint internal scripts with eslint:recommended

* Warnings r bad

* Bump jsx-a11y version

* Update package dependecy for jsx-a11y

* Bump version in react-scripts

* updating eslint to 3.16.1

* add support for ignoreRestSiblings in eslint

http://eslint.org/docs/rules/no-unused-vars#ignorerestsiblings

* updating eslint to 3.16.1 in `react-scripts`

* updating eslint

* missing `^`

* missing ^

* pinning main eslint and updating readme

* Pin ESLint version

* Disable require.ensure

* Replace require.ensure with import

* Add babel plugin for parsing import()

* Get the default

* Upgrade babel-eslint to support dynamic import

* Fix dep

* Update deps

* Use a more sophisticated template for end-to-end testing.

* Not publish integration tests to npm

* Use "commander" for  cli argv handling

* Handle different scripts version forms and exits without a name given

* Prepare the commands for testing with a template

* Fix dev "template" path

* Add various features to test

* Test various features separately

* Test language features

* Comment unused e2e.sh lines

* Add "development" tests

* Test environment variables

* Test webpack plugins

* Replace kitchensink README

* Switch integration tests from jest to mocha

* Use `fs-extra`

* Use the correct folders

* Do some cleanup

* Print a better message for `--template`

* Test `npm start` with and without https

* Separate fast e2e testing from kitchensink testing

* Hide `--internal-testing-template` (former `--template`) CLI option

* Update dependencies

* Use published version of eslint-config-react-app for development

We dogfood on our eslint-config-react-app by using it as our ESLint config,
but installing it from the local folder causes problems when its peerDependencies
are updated, because npm won't update it unless the version number changes.

Use the published version for dogfooding so it can be installed from npm.