As of TypeScript 3.9, the tsc emit is not compatible with Closure
Compiler due to
https://github.com/microsoft/TypeScript/pull/32011.

There is some hope that this will be fixed by a solution like the one
proposed in
https://github.com/microsoft/TypeScript/issues/38374 but currently it's
unclear if / when that will
happen.

Since the Closure support has been somewhat already broken, and the
tsickle pass has been a source
of headaches for some time for Angular packages, we are removing it for
now while we rethink our
strategy to make Angular Closure compatible outside of Google.

This change has no effect on our Closure compatibility within Google
which work well because all the
code is compiled from sources and passed through tsickle.

This change only disables the tsickle pass but doesn't remove it.

A follow up PR should either remove all the traces of tscikle or
re-enable the fixed version.

BREAKING CHANGE: Angular npm packages no longer contain jsdoc comments
to support Closure Compiler's advanced optimizations

The support for Closure compiler in Angular packages has been
experimental and broken for quite some
time.

As of TS3.9 Closure is unusable with the JavaScript emit. Please follow
https://github.com/microsoft/TypeScript/issues/38374 for more
information and updates.

If you used Closure compiler with Angular in the past, you will likely
be better off consuming
Angular packages built from sources directly rather than consuming the
version we publish on npm
which is primarily optimized for Webpack/Rollup + Terser build pipeline.

As a temporary workaround you might consider using your current build
pipeline with Closure flag
`--compilation_level=SIMPLE`. This flag will ensure that your build
pipeline produces buildable and
runnable artifacts, at the cost of increased payload size due to
advanced optimizations being disabled.

If you were affected by this change, please help us understand your
needs by leaving a comment on https://github.com/angular/angular/issues/37234.

PR Close #37221

This commit contains the release notes for the
9.1.9 release. They were copy-pasted from the
CHANGELOG on the 9.1.x (patch) branch.

Update docs in the micro benchmarks to include:
* How to run with no turbo inlining
* Where to find the profiles in the DevTools
* Best way to debug benchmarks (using the profile_in_browser rather than --inspect-brk)

PR Close #37140

Remove bazel yarn format deprecation message to complete the removal of
formatting bazel related files via yarn command command.

PR Close #37148

Creates common logging functions at different levels. Allows for providing
logging statements which are actually printed to the console based on the
LOG_LEVEL environment variable.

PR Close #37192

This commit updates the script that checks master and patch branches to ignore features with `dev-infra` scope
 while verifying that there are no feature commits in patch branch. It's ok and in fact desirable for dev-infra features to be on the patch branch.

PR Close #37210

The `fw-testing` PullApprove group is really designed to
capture the top level public testing API groups in packages
like `common` and `router`.

The compiler-cli also has some folders that contain the path
segment `testing` but these should not require `fw-testing`
PullApprove approval.

This commit excludes the whole of `compiler-cli` package from
the `fw-testing` group.

PR Close #37220

In ES2015 IIFE wrapped classes, the identifier that would reference the class
of the NgModule may be an alias variable. Previously the `Esm2015ReflectionHost`
was not able to match this alias to the original class declaration. This resulted
in failing to identify some `ModuleWithProviders` functions in such case.

These IIFE wrapped classes were introduced in TypeScript 3.9, which is why
this issue is only recently appearing. Since 9.1.x does not support TS 3.9
there is no reason to backport this commit to that branch.

Fixes #37189

PR Close #37206

This test helper can be useful when searching for nodes within an IIFE.
Exporting it here is helpful in ngcc reflection tests.

PR Close #37206

To better check that the code is working, this commit gives a
distinct name (`DecoratedWrappedClass_1`) to the "adjacent"
class declaration in the tests.

PR Close #37206

When pasting over the 9.1.8 release notes,
the link for 10.0.0-next.9 was accidentally
cut off. This commit fixes the broken link for
10.0.0-next.9 in the CHANGELOG.

This commit contains the release notes for
9.1.8, which were copy-pasted from the
9.1.x (patch) branch's CHANGELOG.

Previously, the correct behavior of Angular custom elements relied on
the constructor being called (and thus the `injector` property being
initialized). However, some polyfills (e.g. `document-register-element`)
do not call the constructor of custom elements, which resulted in the
`injector` property being undefined and the `NgElementStrategy` failing
to be instantiated.

This commit fixes it by being tolerant to the `injector` property being
undefined and falling back to the injector passed to the
`createCustomElement()` config.

NOTE:
We don't have proper tests exercising the situation where the
constructor is not called. For now this is tested using a Google
internal test suite (which is how this issue was caught).
This commit also adds a rudimentary unit test to emulate this situation.

PR Close #36114

Previously, if an element started out as a regular `HTMLElement` (not a
Custom Element) and was later upgraded to a Custom Element, any
properties corresponding to component inputs that were set on the
element before upgrading it would not be captured correctly and thus not
reflected on the instantiated component.

This commit fixes it by ensuring that such properties are captured
correctly.

Jira issue: [FW-2006](https://angular-team.atlassian.net/browse/FW-2006)

Fixes #30848
Closes #31416

PR Close #36114

Previously, the `TestStrategy` `NgElementStrategy` used in
`createCustomElement()` tests was created once and re-used in each test
(due to complications related to how `customElements.register()` works).
As a result, the `TestStrategy` instance's state (e.g. inputs) could be
polluted from previous tests and affect subsequent ones.

This commit ensures the strategy instance is reset before each test.

PR Close #36114

Previously, helper modules/components classes were declared even if the
tests were not run (because the environment did not support Custom
Elements for example).

This commit moves the declaration of the helpers inside the `describe()`
block, so they are not declared unnecessarily. This is in preparation of
adding more helpers that need to access variables declared inside the
`describe()` block.

PR Close #36114

- Remove imports that are not used.
- Remove private class properties that are not used outside of the
  constructor.

PR Close #36114

Previously, we had to check whether `NgElementStrategy` had been
instantiated before accessing it. This was tedious and error prone,
since it was easy to forget to add the check in new call sites.

This commit switches to using a getter, so that the check has to be
performed in one place and is transparent to call sites (including any
future ones).

PR Close #36114

`createCustomElements()` creates some getters/setters for properties
corresponding to component inputs that delegate to the
`NgElementStrategy`. However, it is not guaranteed that the element's
`NgElementStrategy` will have been created when these getters/setters
are called, because some polyfills (e.g. `document-register-element`) do
not call the constructor.

Previously, trying to get/set input properties before connecting the
element to the DOM (via `connectedCallback()`) would fail due to
`NgElementStrategy` not being created.

This commit ensures that the `NgElementStrategy` is always created
before used inside the input property getters/setters (similar to how it
is done for other methods of `NgElement`).

Mentioned in https://github.com/angular/angular/pull/31416/files#r300326698.

PR Close #36114

The info about the pw storage is out of date.

We should really just point the reader to a go link, something like go/angular/passwords and keep
the info about secrets there.

PR Close #37212

Vikram and Alex are now Angular alumni. They made a mark on Angular and I hope we'll
get to collaborate with them in the future.

PR Close #37212

The TOC at the top refers to an anchor that does not exist.

This change adds the missing anchor while preserving the old one in case someone depends on it.

PR Close #37212

Update developer instructions by clarify and adding missing login details for the hub.docker.com image server.

PR Close #37185

Marks the commit-mesage-filter.js file as executable, allowing it
to be run by 'git filter-branch' during the merge script process.

PR Close #37209

The deprecation notice for the merge-pr script errantly referenced
'ng dev' rather than 'ng-dev', this PR corrects this.

PR Close #37208

`ts-node` is now an optional peer dependency of the shared dev-infra
package. Whenever a `ng-dev` command runs, and a TypeScript-based
configuration file exists, `ts-node` is set up if available.

That allows consumers of the package (as the components repo) to more
conveniently use a TypeScript-based configuration for dev-infra.

Currently, commands would need to be proxied through `ts-node`
which rather complicates the setup:

```
NG_DEV_COMMAND="ts-node ./node_modules/@angular/dev-infra-private/cli.js"
```

I'm thinking that it should be best-practice to use TypeScript for
writing the configuration files. Given that the tool is used primarily
in Angular projects (for which most sources are TypeScript), this should
be acceptable.

PR Close #37196

Adds a deprecation notice to the old merge-pr script informing the
user the script will be removed in favor of the ng-dev merge tooling.
This currently serves as a warning, and does not fail to perform the
merge.

PR Close #37204

Tslib version is bound to the TypeScript version used to compile the library. Thus, we shouldn't list `tslib` as a  `peerDependencies`. This is because, a user can install libraries which have been compiled with older versions of TypeScript and thus require multiple `tslib` versions to be installed.

Reference: TOOL-1374 and TOOL-1375

Closes: #37188

PR Close #37198

PR #36601 itroduces icons on all links if the link contains https:// or http:// but there were some internal links left which contained https://angular.io. Removed https://angular.io from all these links.

PR Close #37157

The `rev` property has been in the initial commit that introduced
`resources.json` (196203f6) and has been
added to all new entries since (always with the value `true`). This
field is a remnant from back when this data was stored in a Firebase
Database and the `rev` field indicated whether the entry has been
reviewed/approved by a DevRel lead or something. Now that the data is
kept in the repository and the reviewing is done as part of the
corresponding PR, this field is no longer necessary.

PR Close #37181

Updating [angular#master](https://github.com/angular/angular/tree/master) from [cli-builds#master](https://github.com/angular/cli-builds/tree/master).

##
Relevant changes in [commit range](https://github.com/angular/cli-builds/compare/dbde51375...200a21f8a):

**Modified**
- help/build.json

PR Close #37200

This commit corrects a typo and rephrases the first sentence of the `redirectTo`
description to be more understandable.

PR Close #37166

This commit removes the `bootstrap()` function in the test project since
its presence has no effect on the behavior of language service.

Also removes the explicit cast when instantiating `CounterDirectiveContext`,
and let type inference takes care of that.

PR Close #37122

Creates a tool in ng-dev which rebases a PR automatically and pushes
the rebase commits back to the PR.  This is meant to be a replacement
to the local merge script currently in the repo and currently has
feature parity.

PR Close #37055

Remove the local rebase-pr script with a deprecation message
informing the user to instead perform rebases via ng-dev

PR Close #37055

The RouterLink and RouterLinkWithHref inputs do not have any docs. This comment adds jsdoc comments to the inputs.

PR Close #37018

PR #13380 added support for `null` and `undefined` but the type on the parameter was not updated.
This would result in a compilation error if `fullTemplateTypeCheck` is enabled.
Fixes #36544

PR Close #37018

With 844208f4, we disabled the
components-repo-unit-tests job. The components repo landed the required
TS 3.9.x update, so we can re-enable the job again.

PR Close #37176