* Adds support for `flutter test --wasm`.
* The test compilation flow is a bit different now, so that it supports compilers other than DDC. Specifically, when we run a set of unit tests, we generate a "switchboard" main function that imports each unit test and runs the main function for a specific one based off of a value set by the JS bootstrapping code. This way, there is one compile step and the same compile output is invoked for each unit test file.
* Also, removes all references to `dart:html` from flutter/flutter.
* Adds CI steps for running the framework unit tests with dart2wasm+skwasm
* These steps are marked as `bringup: true`, so we don't know what kind of failures they will result in. Any failures they have will not block the tree at all yet while we're still in `bringup: true`. Once this PR is merged, I plan on looking at any failures and either fixing them or disabling them so we can get these CI steps running on presubmit.
This fixes https://github.com/flutter/flutter/issues/126692
This makes several changes to flutter web app bootstrapping.
* The build now produces a `flutter_bootstrap.js` file.
* By default, this file does the basic streamlined startup of a flutter app with the service worker settings and no user configuration.
* The user can also put a `flutter_bootstrap.js` file in the `web` subdirectory in the project directory which can have whatever custom bootstrapping logic they'd like to write instead. This file is also templated, and can use any of the tokens that can be used with the `index.html` (with the exception of `{{flutter_bootstrap_js}}`, see below).
* Introduced a few new templating tokens for `index.html`:
* `{{flutter_js}}` => inlines the entirety of `flutter.js`
* `{{flutter_service_worker_version}}` => replaced directly by the service worker version. This can be used instead of the script that sets the `serviceWorkerVersion` local variable that we used to have by default.
* `{{flutter_bootstrap_js}}` => inlines the entirety of `flutter_bootstrap.js` (this token obviously doesn't apply to `flutter_bootstrap.js` itself).
* Changed `IndexHtml` to be called `WebTemplate` instead, since it is used for more than just the index.html now.
* We now emit warnings at build time for certain deprecated flows:
* Warn on the old service worker version pattern (i.e.`(const|var) serviceWorkerVersion = null`) and recommends using `{{flutter_service_worker_version}}` token instead
* Warn on use of `FlutterLoader.loadEntrypoint` and recommend using `FlutterLoader.load` instead
* Warn on manual loading of `flutter_service_worker.js`.
* The default `index.html` on `flutter create` now uses an async script tag with `flutter_bootstrap.js`.
Pinning the package:web dependency constrains downstream packages from
using newer versions and making sure they support the version pinned in
Flutter. Since the usage of package:web in Flutter is light, we should
instead have a small shim like the engine and keep package:web as a dev
dependency only.
This version is needed so that dart:js_interop can move to extension
types. Also adds some code to handle some breaking changes:
- Body -> Response. Body was an IDL interface mixin type we exposed in
dart:html. Going forward, users should either use Request or Response.
- Casts to JSAny. These are temporary until we move package:web types to
extension types. Currently, package:web types can't implement JSObject
as JSObject will move to be an extension type itself.
Co-authored-by: Kevin Moore <kevmoo@users.noreply.github.com>
## Description
This PR adds a `nonce` parameter to flutter.js' `loadEntrypoint` method.
When set, loadEntrypoint will add a `nonce` attribute to the `main.dart.js` script tag, which allows Flutter to run in environments slightly more restricted by CSP; those that don't add `'self'` as a valid source for `script-src`.
----
### CSP directive
After this change, the CSP directive for a Flutter Web index.html can be:
```
script-src 'nonce-YOUR_NONCE_VALUE' 'wasm-unsafe-eval';
font-src https://fonts.gstatic.com;
style-src 'nonce-YOUR_NONCE_VALUE';
```
When CSP is set via a `meta` tag (like in the test accompanying this change), and to use a service worker, the CSP needs an additional directive: [`worker-src 'self';`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/worker-src)
When CSP set via response headers, the CSP that applies to `flutter_service_worker.js` is determined by its response headers. See **Web Workers API > [Content security policy](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API/Using_web_workers#content_security_policy)** in MDN.)
----
### Initialization
If the CSP is set to disallow `script-src 'self'`, a nonce needs to also be passed to `loadEntrypoint`:
```javascript
_flutter.loader.loadEntrypoint({
nonce: 'SOME_NONCE',
onEntrypointLoaded: (engineInitializer) async {
const appRunner = await engineInitializer.initializeEngine({
nonce: 'SOME_NONCE',
});
appRunner.runApp();
},
});
```
(`nonce` shows twice for now, because the entrypoint loader script doesn't have direct access to the `initializeEngine` call.)
----
## Tests
* Added a smoke test to ensure an app configured as described above starts.
## Issues
* Fixes https://github.com/flutter/flutter/issues/126977
- Bumps `vm_service` from `11.6.0` to `11.7.1`
- Bumps `web` from `0.1.3-beta` to `0.1.4-beta` and adds it everywhere.
- Moves `js` from `dependencies` to `dev_dependencies`
* Roll Flutter Engine from 67254d6e4b03 to 8d83b98c55b3
* Roll Dart SDK from 35a9facce191 to e517487c5679 (Dart 3.0) (#38105)
* Bump SDK versions.
* Bump Dart SDK version constraints
* Update shrine package to 2.0.1 (null safe version)
* Fix more tests.
* Include patches from Jason for min android sdk version
* Fix analyzer warning
