* Add initial support for new env config file

* Fix serverless processEnv call when no env is provided

* Add missing await for test method

* Update env config to .env.json and add dotenv loading

* ncc dotenv package

* Update type

* Update with new discussed behavior removing .env.json

* Update hot-reloader createEntrypoints

* Make sure .env is loaded before next.config.js

* Add tests for all separate .env files

* Remove comments

* Add override tests

* Add test for overriding env vars based on local environment

* Add support for .env.test

* Apply suggestions from code review
Co-Authored-By: NJoe Haddad <joe.haddad@zeit.co>

* Use chalk for env loaded message

* Remove constant as it’s not needed

* Update test

* Update errsh, taskr, and CNA template ignores

* Make sure to only consider undefined missing

* Remove old .env ignore

* Update to not populate process.env with loaded env

* Add experimental flag and add loading of global env values
Co-authored-by: NTim Neutkens <timneutkens@me.com>
Co-authored-by: NJoe Haddad <joe.haddad@zeit.co>

* Disable core-js on Next.js core files as it's not transforming anything important

* Move babel options to taskr plugin

* Disable transform-runtime for pages dir

* Disable correctly

* Disable corejs for core files

* Temporarily check if this fixes the error

* Don't include core-js for default _document

* update taskfile.js
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Expose CSS Issuer When Error
This introduces a friendlier error for invalid CSS imports by telling you the offending file.

---

Fixes #9847

* fix test matches

* Disable CSS Support When Manually Configured

* upgrade TS

* adjust yarn lock

* Remove another version of TypeScript

* Remove possibly leftover loader

* Revert "Remove possibly leftover loader"

This reverts commit 7ce2d1a8854f3d7a833867f8ac3be7923a6cb1d8.

* Update to use no-op loader

* Update `packages/`

* Update examples

* Update tests

* Update bench

* Update top level files

* Fix build

* trigger

* Add initial bit for plugins

* Add checks for needed metadata values

* Add test

* Initial plugins changes

* Add handling for _app middleware

* Add loading of _document middleware and
handling of multiple default export syntaxes

* Fix insert order for middleware member expression

* Remove early return from middleware plugin from testing

* Add tests for current plugin middlewares

* Update test plugin package.json

* Update handling for class default export

* Update to use webpack loader instead of babel
plugin, remove redundant middleware naming, and add field for required env for plugins

* Add middleware to support material-ui use case
and example material-ui plugin

* Update tests and remove tests stuff from google analytics plugin

* Remove old plugin suite

* Add init-server middleware

* Exit hard without stack trace when error in collecting plugins

* Add on-error-client and on-error-server and update
to run init-server with next-start in serverless mode

* Update init-client for google analytics plugin

* Add example Sentry plugin and update with-sentry-simple

* Remove middleware field/folder and use src dir for plugins

* Add post-hydration middleware and update
material-ui plugin

* Put plugins code behind flag

* Update chromedriver

* Revert "Update chromedriver"

This reverts commit 1461e978e677f7da05e29e0415ec614a04bf65f9.

* Update lock file

* Remove un-needed _app for sentry example

* Add auto loading of scoped packages, add plugins
config for manually listing plugins, and update
to only collect plugins once

* Update example plugins

* Expose plugins' config

* Rename plugin lifecycles and add babel-preset-build

* Rename other methods with unstable

* Update log when plugin config overrides auto-detecting

* Initial move

* Make emitting work

* Update paths

* Remove leftover files

* Add correct externals configuration

* Import correct path

* Update path to work with ts-server test

* Update lib directory

* Compile next-server/lib

* Add anonymous telemetry

* Fix types

* Remove semver package

* Rename build time variable

* Track CSS-in-JS solutions

* Single retry and 5s timeout

This reverts commit e85a517e.

* Reimplement ncc webpack build

This reverts commit 6feca310.

* Shared webpack build

* ncc workaround pending @zeit/ncc#437

* update ncc

* build tweaks, fixup autodll-import

* possible Node 8 fix

* second possible Node 8 fix

* and update taskfile

This change will prompt the user about missing packages using the same DX instead of two separate code paths.

* Run prettier over packages/**/*.js

* Run prettier over packages/**/*.ts

* Run prettier over examples

* Remove tslint

* Run prettier over examples

* Run prettier over all markdown files

* Run prettier over json files

* Revert "Add retrying to CircleCi and fixes for ncc'ed webpack (#7366)"

This reverts commit 5beb365d.

* Revert "ncc Webpack build (#7301)"

This reverts commit bd8f3c62.

# Conflicts:
#	packages/next/package.json

* Add retrying to CircleCi and run prepublish separately to get better logs in Azure

* Apply workaround for Azure node 10 and ncc

* Update incorrect webpack imports

* Use ncced autodll-webpack-plugin

* Move autodll-webpack-plugin to devDependencies

* add back ncc

* fixup ncc build

* Use async/await in build output

* Run next client libraries through plugin-transform-modules-commonjs

* Fix missing includes

* Added babel typescript for the core files

* Add __NEXT_VERSION

* Added noop.js to the babel taskfile

* Only include dynamic-import-node for the bin task

* Added babel-plugin-dynamic-import-node

* Use loose option to prevent Object.defineProperty

* Enable loose in preset and enable compact mode

* Disable compact and loose to compare

* Re-enable compact and loose

Replaced regenerator with async-to-promises

Related to [create-react-app#5278](https://github.com/facebook/create-react-app/pull/5278#issue-220142150)

* [wip] individual page builds

* Make flag experimental and remove from main bin

* Do not split chunks when using shared runtime

More modules to follow.