This updates collecting dynamic route params on Vercel to make sure that missing optional dynamic routes are undefined. Additional tests for this mode have also been added to ensure the params are being collected properly

Closes: https://github.com/vercel/next.js/issues/15579

Co-authored-by: Natcastle <atcastle@gmail.com>

This PR corrects the data fetching behavior for optional root routes.

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Fixes #14923

This adds handling for custom-routes with `basePath` to automatically add the `basePath` for custom-routes `source` and `destination` unless `basePath: false` is set for the route. 

Closes: https://github.com/vercel/next.js/issues/14782

Discovered while working on https://github.com/vercel/next.js/pull/14848

when asPath is the same but href is different it should use `replaceState` instead of `pushState`, so that browser back/forward behavior is preserved. Currently it's comparing a path that includes basepath with one that excludes  it, so `pushState` is always used. This makes sure the behavior is the same as when running next.js without a basepath

Fixes #11711

Also cleaned up some extra code.

This was already supported on the Vercel edge network.

This makes sure to base64 encode the `.env*` file contents before passing them in the URL for the serverless-loader since `!` is a special character in this case which can cause webpack to fail to build

Closes: https://github.com/vercel/next.js/issues/14749

This updates to rely on query values from the proxy when capable to ensure the correct values are provided. This does not remove the `x-now-route-matches` as this is still needed until the values are provided in the query instead for iSSG

x-ref: https://github.com/zeit/now/pull/4196
x-ref: https://github.com/zeit/next.js/pull/12250
x-ref:

Tested against the following updated fixtures from https://github.com/vercel/vercel/pull/4682 with https://github.com/ijjk/next-update-loader

- 08-custom-routes-catchall
- 10-export-cache-headers
- 16-base-path
- 22-ssg-v2
- 23-custom-routes-verbose

To make `asPath` consistent with `basePath` handling this makes sure it is always stripped including on the client under the `asPath` value and from `req.url` in the `serverless-loader`. Additional tests have been added for this behavior to ensure we don't regress on this

Closes: https://github.com/vercel/next.js/issues/14037
Closes: https://github.com/vercel/next.js/issues/14039

In serverless mode, it's best practice to propagate an unhandled error so that the function is disposed instead of recycled. This helps fix the "bad state" problem.

As discussed this adds bundling of `.env` files in `serverless` mode so that the environment values are also available when deploying with this target

closes: https://github.com/zeit/next.js/issues/13332

Fixes https://github.com/zeit/next.js/issues/12935

* Add basePath in link component and add/remove it consistently

* Update to not use regex for delBasePath

* Expose addBasePath as router method

* Revert "Expose addBasePath as router method"

This reverts commit 40fed596195c6affabf837e42d472452768e13a3.

* Expose basePath as router field

* Apply suggestion

* Expose basePath as router field

* remove un-used vars

* Update externals

* Apply lint fix

* Update size-limit test

* Update prefetch

* Update to make sure to respond with 400 for invalid URLs

* Update response text for 400 API error

* Remove req.env

* Rename NEXT_APP_ to NEXT_PUBLIC_

* Remove key exposing env config

* Update tests

* Update NEXT_APP_ test to NEXT_PUBLIC_

* 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>

* Ensure hybrid AMP works correctly with SSG

* Strip AMP from query when not needed

* Correct Cache-Control Behavior for GS(S)P

* remove old line

* fix test

* Verify GS(S)P Serializability

* Add support for cyclic refs

* Add unit tests

* Test for error in development mode

* Fix prerender preview tests

* Fix gssp preview tests

* fix 2x test cases

* Add desired test

* fix some more tests

* Fix route manifest expect

* Fix test expects

* Test that `getServerSideProps` does not error in production

* Test that getStaticProps is not checked in production

* Test serialization check during build

* Fix export detection for serverless

* Update test/unit/is-serializable-props.test.js
Co-Authored-By: NJJ Kasper <jj@jjsweb.site>
Co-authored-by: NJJ Kasper <jj@jjsweb.site>

* Add failing test case

* Update serverless-loader require to fix config module mismatch
Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Rename getServerProps to getServerSideProps

* Remove unstable_ prefix from new methods

* Add error when legacy methods are detected

* Add legacy methods for babel transform

* Add unstable_getServerSideProps also

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

* Update types import
Co-authored-by: NJoe Haddad <timer150@gmail.com>

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Preview Mode Should Not Cache

* add import

* fix import

* add tests

* Add real serverless mode tests

* checkpoint: api impl

* Add support for tryGetPreviewData

* snapshot: server(less) support

* Add X-Prerender-Bypass-Mode header support

* Pass preview data to getStaticProps call

* add TODO

* setPreviewData

* 100k iterations

* Handle jwt error

* Write out preview values

* forgot file

* set preview props

* Send preview props

* add preview props

* Pass around more data

* update yarn lock

* Fail on Invalid Prerender Manifest

* Make Missing Prerender Manifest Fatal

* fix ts errors

* fix test

* Fix setting cookies + maxage

* Secure is not needed as we encrypt necessary data

* Set on domain root

* Set cookie max ages

* Render a fallback on-demand for non-dynamic pages

* Test preview mode

* remove old build

* remove snapshots

* Add serverless tests

* use afterAll

* Remove object assigns

* fix cookie spread

* add comment

* Add initial SSG fallback handling

* Remove extra changes and update fallback handling

* Remove extra timeout for testing

* Update SSG tests in dynamic-routing suite

* Add racing to decide between rendering fallback and data

* Update size-limit test

* Update comment

* Make sure to follow correct route change order

* Make comment more verbose for racing

* Revert getStaticData to only return Promise

* Make sure to update URL on fallback

* Add retrying for data, de-dupe initial fallback request, and merge fallback replace

* Update to add preload for fallback pages data

* Add test for data preload link

* Use pre-built fallback in production mode

* Remove preload link for fallback from _document

* Update to make sure fallback is rendered correctly for serverless

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* Add support for runtimeConfigs in serverless mode

* Update test

* Add support for unstable_getServerProps

* Apply suggestions from review

* Add no-cache header and update types

* Revert sharing of load-components type

* Add catchall test and update routes-manifest field

* Update header check

* Update to pass query for getServerProps data requests

* Update to not cache getServerProps requests

* Rename server side props identifier

* Update to nest props for getServerProps

* Add no-cache header in serverless-loader also

* Update to throw error for mixed SSG/serverProps earlier

* Add comment explaining params chosing in serverless-loader

* Update invalidKeysMsg to return a string and inline throwing

* Inline throwing mixed SSG/serverProps error

* Update setting cache header in serverless-loader

* Add separate getServerData method in router

* Update checkIsSSG -> isDataIdentifier

* Refactor router getData back to ternary

* Apply suggestions to build/index.ts

* drop return

* De-dupe extra escape regex

* Add param test

Co-authored-by: NJoe Haddad <timer150@gmail.com>

* De-dupe escape-regex with escape-string-regex

* Un de-dupe for client-side file