Commit Graph

17822 Commits

Author SHA1 Message Date
Keen Yee Liau 1142c378fd feat(language-service): [ivy] wrap ngtsc to handle typecheck files (#36930)
This commit adds a Compiler interface that wraps the actual ngtsc
compiler. The language-service specific compiler manages multiple
typecheck files using the Project interface, creating and adding
ScriptInfos as necessary.

This commit also adds `overrideInlineTemplate()` method to the mock
service so that we could test the Compiler diagnostics feature.

PR Close #36930
2020-05-08 14:42:11 -07:00
Alan Agius 82a3bd5e8b ci: disable sauce labs safari and ios tests (#36973)
With this change we disable SauceLabs tests on Safari and iOS as they are current broken.

Issue to investigate further: #36975

PR Close #36973
2020-05-08 14:41:26 -07:00
Alan Agius 5f3fba43fa ci: update tested browsers to match supported browsers (#36973)
With a previous change we add FireFox Extended Support Release (ESR) to the list of supported browsers.

With this change we now add this above mentioned browser to list of tested browsers and also update several other browsers.

Removed browsers because they are no longer supported:
- iOS 10 and 11
- Safari 10 and 11

Added
- Firefox 68 (Current ESR version)
- Safari 12 and 13
- iOS Safari 12 and 13

Updated
- Update Chrome to 81
- Updated Firefox to 76

PR Close #36973
2020-05-08 14:41:26 -07:00
Alan Agius eca2246fbc docs: add FireFox ESR to the supported list (#36973)
With this change we add FireFox Extended Support Release (ESR) to the list of supported browsers. The ESR latest version is used mainly in corporate environments (intranet applications, etc.) due to its support and stability guarantees.

PR Close #36973
2020-05-08 14:41:26 -07:00
George Kalpakas df71c7c617 build(docs-infra): upgrade cli command docs sources to 15edb0231 (#37005)
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](b7d7ee9bd...15edb0231):

**Modified**
- help/generate.json
- help/new.json

**Removed**
- help/get.json
- help/set.json

##
Relevant changes in [commit range](440275c34...15edb0231) since PR #36981:

**Removed**
- help/get.json
- help/set.json

##
Closes #36950
Closes #36981

PR Close #37005
2020-05-08 14:40:50 -07:00
Joey Perrott c184de175d build: migrate to typescript file for ng-dev config (#37017)
Migrate to use a typescript file rather than a javascript file for
defining the ng-dev config file.  This will allow long term for the
config to rely on the types while writing the config, avoiding
errors.

PR Close #37017
2020-05-08 14:40:11 -07:00
Joey Perrott 8b65946eb8 feat(dev-infra): support typescript config file (#37017)
Previously ng-dev loaded the config through a javascript file, this
change allows for the loaded file to be either javascript or
typescript.  This enables configurations to be written with type
safety.

PR Close #37017
2020-05-08 14:40:11 -07:00
Alex Rickabaugh de0c71c467 docs: release notes for the v9.1.6 release 2020-05-08 11:39:11 -07:00
Ajit Singh 39e066add1 refactor(docs-infra): change class to interface where class properties not used (#36958)
In resource.model.ts the interfaces of the resources were defined as classes, these do not use any class properties and are only used for type checking. So, changed them from class to interface.

PR Close #36958
2020-05-08 09:41:56 -07:00
David Shevitz 🔵 178e750f16 docs: Fix typo in navigation.json (#36955)
While creating the new tutorial section, I hit o instead of i when
typing the word 'tooltip.' This is understandable, as they are right
next to each other on the keyboard. I might move to the Dvorak
keyboard layout to avoid such errors in the future.

PR Close #36955
2020-05-08 09:41:23 -07:00
Lars Gyrup Brink Nielsen 14be55c9fa docs(common): remove mention of the deprecated (#36953)
web worker platform. Minor grammar/stylistic changes.

Inline documentation for the PlatformLocation service instead mentions @angular/platform-server.

Typos corrected, minor grammar and stylistic changes.

PR Close #36953
2020-05-08 09:40:35 -07:00
Sonu Kapoor fdd61152c5 docs: replace into with in (#36778)
Closes #36775
PR Close #36778
2020-05-08 09:39:26 -07:00
Santosh Yadav 7cc332efe6 docs: update aot compiler docs (#35487)
change to aot docs to include changes after angular 9
aot is true for new applications created, also it will
be updated to aot true once app is updated using ng update

PR Close #35487
2020-05-08 09:38:55 -07:00
Joey Perrott 1eba1aaf15 build: update ng-dev config file (#36918)
Migrate to the new .ng-dev-config.js file for providing a configuration
to ng-dev.  This is being done as a result of the previous commit which
updated the ng-dev command to expect this new file.

PR Close #36918
2020-05-08 09:38:25 -07:00
Joey Perrott 4e628a887a fix(dev-infra): update the config file loading for ng-dev to expect js (#36918)
Migrating to a js file for providing a configuration allows for more
extensive configuration at run time.  This allows for configs to include
logic and move beyond static values found in JSON files.

PR Close #36918
2020-05-08 09:38:25 -07:00
Alex Rickabaugh b6bc0aeb61 release: cut the v10.0.0-next.6 release 2020-05-07 15:52:58 -07:00
Alex Rickabaugh 77d8afb7da docs: release notes for the v9.1.5 release 2020-05-07 15:13:17 -07:00
Alex Rickabaugh 42d1091d6a fix(compiler-cli): don't try to tag non-ts files as shims (#36987)
Some projects include .js source files (via the TypeScript allowJs option).
Previously, the compiler would attempt to tag these files for shims, which
caused errors as the regex used to create shim filenames assumes a .ts file.
This commit fixes the bug by filtering out non-ts files during tagging.

PR Close #36987
2020-05-07 14:45:05 -07:00
Paul Gschwendtner d0280a0335 fix(compiler): remove outdated and invalid warning for unresolved DI parameters (#36985)
In past versions of the View Engine compiler, we added a warning that is
printed whenever the compiler comes across an Angular declaration with a
constructor that does not match suitable DI tokens. The warning mentioned
that in `v6.x` it will turn into an actual error.

This actually happened as expected for most cases. e.g. the constructor
of `@NgModule`, `@Component`'s, `@Pipe`'s etc will be checked and an error
will be reported if constructor is not DI compatible.

The warning has never been removed though as it was still relevant for
unprovided injectables, or injectables serialized into summaries of the
Angular compiler.

As of version 10, classes that use Angular features need an Angular decorator.
This includes base classes of services that use the lifecycles Angular feature.
Due to this being a common pattern now, we can remove the warning in
View Engine. The warning is not correct, and also quite confusing as it
mentions the planned removal in `v6.x`.

Resolves FW-2147.

PR Close #36985
2020-05-07 14:44:42 -07:00
Tidi 97d6d909e7 fix(forms): number input fires valueChanges twice. (#36087)
Prior to this commit, number input fields would to fire valueChanges twice: once for `input` events when typing and second for the `change` event when the field lost focus (both events happen at once when using the increment and decrement buttons on the number field).

Fixes #12540

BREAKING CHANGE: Number inputs no longer listen to the `change` event.
* Tests which trigger `change` events need to be updated to trigger `input` events instead.
* The `change` event was in place to support IE9, as we found that `input` events were not fired with backspace or cut actions. If you need to maintain IE9 support, you will need to add a change event listener to number inputs and call the `onChange` method of `NumberValueAccessor` manually.
* Lastly, old versions of WebDriver would synthetically trigger the `change` event on `WebElement.clear` and `WebElement.sendKeys`. If you are using an old version of WebDriver, you may need to update tests to ensure `input` events are triggered. For example, you could use `element.sendKeys(Keys.chord(Keys.CONTROL, "a"), Keys.BACK_SPACE);` in place of `element.clear()`.

PR Close #12540

PR Close #36087
2020-05-07 10:20:26 -07:00
Pete Bacon Darwin f7815cf96d test(compiler-cli): ensure reflection tests are not brittle to case-sensitivity (#36859)
These tests were matching file-paths against what is retrieved from the
TS compiler. But the TS compiler paths have been canonicalised, so the
tests were brittle on case-insensitive file-systems.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 9e43e4900e test(compiler-cli): ensure partial-evaluator tests are not brittle to case-sensitivity (#36859)
These tests were matching file-paths against what is retrieved from the
TS compiler. But the TS compiler paths have been canonicalised, so the
tests were brittle on case-insensitive file-systems.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 8ce38cac0d test(compiler-cli): ensure indexer tests are not brittle to case-sensitivity (#36859)
These tests were matching file-paths against what is retrieved from the
TS compiler. But the TS compiler paths have been canonicalised, so the
tests were brittle on case-insensitive file-systems.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin a10c126692 fix(compiler-cli): use CompilerHost to ensure canonical file paths (#36859)
The type checking infrastrure uses file-paths that may come from the
TS compiler. Such paths will have been canonicalized, and so the type
checking classes must also canonicalize paths when matching.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin b682bd1916 fix(compiler-cli): normalize mock Windows file paths correctly (#36859)
Since the `MockFileSystemWindows` is case-insensitive, any
drive path that must be added to a normalized path should be lower
case to make the path canonical.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 26eacd4fcb fix(compiler-cli): ensure `MockFileSystem` handles case-sensitivity (#36859)
Previously this class used the file passed in directly to look up files in the
in-memory mock file-system. But this doesn't match the behaviour of
case-insensitive file-systems. Now the look up is done on the canonical
file paths.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin fc4741f638 fix(compiler-cli): `isCaseSensitive()` returns correct value (#36859)
Previously this method was returning the exact opposite value
than the correct one.
Also, calling `this.exists()` causes an infinite recursions,
so the actual file-system `fs.existsSync()` method is used
to ascertain the case-sensitivity of the file-system.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 3f3e9b7555 fix(compiler-cli): ensure `getRootDirs()` handles case-sensitivity (#36859)
Previously the `getRootDirs()` function was not converting
the root directory paths to their canonical form, which can
cause problems on case-insensitive file-systems.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 53a8459d5f fix(compiler-cli): ensure LogicalFileSystem handles case-sensitivity (#36859)
The `LogicalFileSystem` was not taking into account the
case-sensitivity of the file-system when caching logical
file paths.

PR Close #36859
2020-05-06 15:23:16 -07:00
Pete Bacon Darwin 0ec0ff3bce fix(compiler-cli): fix case-sensitivity issues in NgtscCompilerHost (#36859)
The `getCanonicalFileName()` method was not actually
calling the  `useCaseSensitiveFileNames()` method. So
it always returned a case-sensitive canonical filename.

PR Close #36859
2020-05-06 15:23:15 -07:00
Paul Gschwendtner f930e75a80 ci: update components-repo-unit-tests job commit (#36921)
Updates the `components-repo-unit-tests` job to
d3a9ac67d2.

We need to update since we added a new diagnostic in ngtsc, and
the given commit in the components repo fixes failures caused by
the new diagnostic.

Note: This commit currently points to a PR as it's unlikely that
this fix lands soon, but we want to move forward. There is no
downside to doing that as the PR is based on top of the latest
components repo `master`.

PR Close #36921
2020-05-06 15:06:11 -07:00
Paul Gschwendtner 854bd7d0c8 build(docs-infra): do not require abstract directives to declare a @ngModule (#36921)
Abstract directives cannot be part of a `@NgModule`, but the AIO dgeni
setup currently enforces this. This commit updates the logic so that
abstract directives are skipped.

PR Close #36921
2020-05-06 15:06:10 -07:00
Paul Gschwendtner e17fe90aaa refactor: fix undecorated classes with angular features in repo (#36921)
A few instances of undecorated classes with Angular features
have been discovered in the framework repo. This commit fixes
those.

PR Close #36921
2020-05-06 15:06:10 -07:00
Paul Gschwendtner 0577bf0e3e refactor: enable ng update migrations for v10 (#36921)
Enables the `ng update` migrations for v10. Status for individual
migrations:

**undecorated-classes-with-di**.

This migration dealt exlusively with inherited constructors and
cases where a derived component was undecorated. In those cases,
the migration added `@Directive()` or copied the inherited decorator
to the derived class.

We don't need to run this migration again because ngtsc throws if
constructor is inherited from an undecorated class. Also ngtsc will
throw if a NgModule references an undecorated class in the declarations.

***undecorated-classes-with-decorated-fields***

This migration exclusively deals with undecorated classes that use
Angular features but are not decorated. Angular features include
the use of lifecycle hooks or class fields with Angular decorators,
such as `@Input()`.

We want to re-run this migration in v10 as we will disable the
compatibility code in ngtsc that detects such undecorated classes
as `@Directive`.

**module-with-providers**:

This migration adds an explicit generic type to `ModuleWithProviders`.
As of v10, the generic type is required, so we need to re-run the
migration again.

**renderer-to-renderer2**:

We don't need to re-run that migration again as the
renderer has been already removed in v9.

**missing-injectable**:

This migration is exclusively concerned with undecorated
providers referenced in an `NgModule`. We should re-run
that migration again as we don't have proper backsliding
prevention for this yet. We can consider adding an error
in ngtsc for v10, or v11. In either way, we should re-run
the migration.

**dynamic-queries**:

We ran this one in v9 to reduce code complexity in projects. Instead
of explicitly passing `static: false`, not passing any object literal
has the same semantics. We don't need to re-run the migration again
since there is no good way to prevent backsliding and we cannot always
run this migration for future versions (as some apps might actually
intentionally use the explicit `static: false` option).

PR Close #36921
2020-05-06 15:06:10 -07:00
Paul Gschwendtner 4c92cf43cf feat(compiler-cli): report error if undecorated class with Angular features is discovered (#36921)
Previously in v9, we deprecated the pattern of undecorated base classes
that rely on Angular features. We ran a migration for this in version 9
and will run the same on in version 10 again.

To ensure that projects do not regress and start using the unsupported
pattern again, we report an error in ngtsc if such undecorated classes
are discovered.

We keep the compatibility code enabled in ngcc so that libraries
can be still be consumed, even if they have not been migrated yet.

Resolves FW-2130.

PR Close #36921
2020-05-06 15:06:10 -07:00
Paul Gschwendtner c6ecdc9a81 feat(core): undecorated-classes-with-decorated-fields migration should handle classes with lifecycle hooks (#36921)
As of v10, undecorated classes using Angular features are no longer
supported. In v10, we plan on removing the undecorated classes
compatibility code in ngtsc. This means that old patterns for
undecorated classes will result in compilation errors.

We had a migration for this in v9 already, but it looks like
the migration does not handle cases where classes uses lifecycle
hooks. This is handled in the ngtsc compatibility code, and we
should handle it similarly in migrations too.

This has not been outlined in the migration plan initially,
but an appendix has been added for v10 to the plan document.

https://hackmd.io/vuQfavzfRG6KUCtU7oK_EA?both.

Note: The migration is unable to determine whether a given undecorated
class that only defines `ngOnDestroy` is a directive or an actual
service. This means that in some cases the migration cannot do
more than adding a TODO and printing an failure.

Certainly there are more ways to determine the type of such classes,
but it would involve metadata and NgModule analysis. This is out of
scope for this migration.

PR Close #36921
2020-05-06 15:06:10 -07:00
Kara Erickson 20cc3ab37e refactor(core): make generic mandatory for ModuleWithProviders (#36892)
In v9, we deprecated the use of ModuleWithProviders
without a generic. In v10, we will be requiring the
generic when using ModuleWithProviders. You can read
more about the reasoning behind this change in the
migration guide:
http://v9.angular.io/guide/migration-module-with-providers

PR Close #36892
2020-05-06 15:01:34 -07:00
Matias Niemelä 420b9be1c1 refactor: disable sanitization for [style] and [style.prop] bindings (#35621)
This patch is the first of many commits to disable sanitization for
[stlye.prop] and [style] bindings in Angular.

Historically, style-based sanitization has only been required for old
IE browsers (IE6 and IE7). Since Angular does not support these old
browsers at all, there is no reason for the framework to support
style-based sanitization.

PR Close #35621
2020-05-06 15:00:22 -07:00
Igor Minar 3c6c00d1d4 docs: remove the note about @angular/http from the deprecations guide (#36944)
We stopped publishing @angular/http to npm a while back (v7?), so from the perspective of our
customer @angular/http has been removed a long time ago and mentioninig it now that we actually
removed the code from our repo is just confusing.

PR Close #36944
2020-05-06 13:54:27 -07:00
Igor Minar 6fa36e387f test(docs-infra): temporarily disable the 'upgrade-phonecat-2-hybrid' docs example test (#36944)
This is due to issue described in: https://github.com/angular/angular/issues/36957

This commit works around the problem rather than trying to solve it in order to unblock the big APF v10 change.

PR Close #36944
2020-05-06 13:54:27 -07:00
Paul Gschwendtner 9bde1be5a4 test: disable ng_package tests in ivy test jobs (#36944)
Since we no longer hardcode the `package.json` for
entry-points, a bug has appeared for `ng_package` in Ivy.

The `package.json` files are populated incorrectly with Ivy
as the flat module bundle name is not propagated from `ng_module`
to the `ng_package` rule. The rule then guesses the index file
to `index.js` and does not respect the flat module bundle shim.

PR Close #36944
2020-05-06 13:54:27 -07:00
Paul Gschwendtner 040253c426 build: update side-effects integration test to not expect esm5 output (#36944)
As mentioned in previous commits, as of v10 the release output
does no longer contain ESM5 output due to an update to the APF.

This means that the side-effect integration test needs to be
updated as it currently expects/tests esm5 output.

PR Close #36944
2020-05-06 13:54:27 -07:00
Paul Gschwendtner c98a4d6ddd feat(ngcc): support for new APF where `module` points to esm2015 output (#36944)
As of version 10, libraries following the APF will no longer contain
ESM5 output. Hence, tests in ngcc need to be updated as they currently
rely on the release output of `@angular/core`.

Additionally, we'd need to support in ngcc that the `module`
property of entry-points no longer necessarily refers to
`esm5` output, but instead can also target `esm2015`.

We currently achieve this by checking the path the `module`
property points to. We can do this because as per APF, the
folder name is known for the esm2015 output. Long-term for
more coverage, we want to sniff the format by looking for
known ES2015 constructs in the file `module` refers to.

PR Close #36944
2020-05-06 13:54:26 -07:00
Paul Gschwendtner d5293d2aa3 fix(bazel): ng_package rule should update "package.json" of ts_library targets (#36944)
In the past we added support for `ts_library` to `ng_package`. For those
targets we never can determine the "index" file. Unlike `ng_module`,
there is no provider data for flat module bundles, so the `ng_package`
rule assumes that the index file is simply called `index`.

This works as expected, but we also added logic in the past that doesn't
allow `ng_package` to add format properties (e.g. `main`, `module`) to a
`package.json` if a package json is handwritten for such a `ts_library` target.

This has been done that way because we assumed that such `package.json` files
might want to set format properties explicitly to different paths due to a
faulty "index" guess.

We want to change this behavior as most of the time a `package.json`
file already exists with just the module name. In those cases, the
packager should still set the format properties. We should only warn
and skip automatic insertion of the format properties if such a
`package.json` explicitly sets format properties.

PR Close #36944
2020-05-06 13:54:26 -07:00
Igor Minar d578ab8f3c build: simplify package.jsons for all of our packages (#36944)
We can remove all of the entry point resolution configuration from the package.json
in our source code as ng_package rule adds the properties automatically and correctly
configures them.

This change simplifies our code base but doesn't have any impact on the package.json
in the distributed npm_packages.

PR Close #36944
2020-05-06 13:54:26 -07:00
Igor Minar 9dbb30f884 feat(bazel): simplify ng_package by dropping esm5 and fesm5 (#36944)
esm5 and fesm5 are no longer needed and have been deprecated in the past.

https://v9.angular.io/guide/deprecations#esm5-and-fesm5-code-formats-in-angular-npm-packages

This commit modifies ng_package to no longer distribute these two formats in npm packages
built by ng_package (e.g. @angular/core).

This commit intentionally doesn't fully clean up the ng_package rule to remove all traces of esm5 and fems5
build artifacts as that is a bigger cleanup and currently we are narrowing down the scope of this change
to the MVP needed for v10, which in this case is 'do not put esm5 and fesm5' into the npm packages.

More cleanup to follow: https://angular-team.atlassian.net/browse/FW-2143

BREAKING CHANGE: esm5 and fesm5 format is no longer distributed in
Angular's npm packages e.g. @angular/core

If you are not using Angular CLI to build your application or library,
and you need to be able to build es5 artifacts, then you will need to
downlevel the distributed Angular code to es5 on your own.

Angular CLI will automatically downlevel the code to es5 if differential
loading is enabled in the Angular project, so no action is required from
Angular CLI users.

PR Close #36944
2020-05-06 13:54:26 -07:00
Pete Bacon Darwin fafa50d97f fix(ngcc): support ModuleWithProviders functions that delegate (#36948)
In #36892 the `ModuleWithProviders` type parameter becomes required.
This exposes a bug in ngcc, where it can only handle functions that have a
specific form:

```
function forRoot() {
  return { ... };
}
```

In other words, it only accepts functions that return an object literal.

In some libraries, the function instead returns a call to another function.
For example in `angular-in-memory-web-api`:

```
InMemoryWebApiModule.forFeature = function (dbCreator, options) {
  return InMemoryWebApiModule_1.forRoot(dbCreator, options);
};
```

This commit changes the parsing of such functions to use the
`PartialEvaluator`, which can evaluate these more complex function
bodies.

PR Close #36948
2020-05-06 13:35:48 -07:00
Pete Bacon Darwin e010f2ca54 refactor(ngcc): move `getModuleWithProvidersFunctions()` into the analyzer (#36948)
Previously this method was implemented on the `NgccReflectionHost`,
but really it is asking too much of the host, since it actually needs to do
some static evaluation of the code to be able to support a wider range
of function shapes. Also there was only one implementation of the method
in the `Esm2015ReflectionHost` since it has no format specific code in
in.

This commit moves the whole function (and supporting helpers) into the
`ModuleWithProvidersAnalyzer`, which is the only place it was being used.
This class will be able to do further static evaluation of the function bodies
in order to support more function shapes than the host can do on its own.

The commit removes a whole set of reflection host tests but these are
already covered by the tests of the analyzer.

PR Close #36948
2020-05-06 13:35:48 -07:00
Misko Hevery c9e0db55f7 refactor(core): deprecate `WrappedValue` (#36819)
The purpose of the `WrappedValue` is to allow same object instance to be treated as different for the purposes of change detection. It is currently used with `async` pipe and only with `Observables`. The use case which it covers is if the `Observable` produces the same instance of the value but it is desirable to still try to mark it as changed for the purposes of change detection.

We believe tha the above use case is too rare to warrant special handling in the framework. (Having special handling causes application slowdown for the users and mental load for the developers.) No replacement is planned for this deprecation.

PR Close #36819
2020-05-06 11:49:57 -07:00
Alex Rickabaugh ecffc3557f perf(compiler-cli): perform template type-checking incrementally (#36211)
This optimization builds on a lot of prior work to finally make type-
checking of templates incremental.

Incrementality requires two main components:
- the ability to reuse work from a prior compilation.
- the ability to know when changes in the current program invalidate that
  prior work.

Prior to this commit, on every type-checking pass the compiler would
generate new .ngtypecheck files for each original input file in the program.

1. (Build #1 main program): empty .ngtypecheck files generated for each
   original input file.

2. (Build #1 type-check program): .ngtypecheck contents overridden for those
   which have corresponding components that need type-checked.

3. (Build #2 main program): throw away old .ngtypecheck files and generate
   new empty ones.

4. (Build #2 type-check program): same as step 2.

With this commit, the `IncrementalDriver` now tracks template type-checking
_metadata_ for each input file. The metadata contains information about
source mappings for generated type-checking code, as well as some
diagnostics which were discovered at type-check analysis time. The actual
type-checking code is stored in the TypeScript AST for type-checking files,
which is now re-used between programs as follows:

1. (Build #1 main program): empty .ngtypecheck files generated for each
   original input file.

2. (Build #1 type-check program): .ngtypecheck contents overridden for those
   which have corresponding components that need type-checked, and the
   metadata registered in the `IncrementalDriver`.

3. (Build #2 main program): The `TypeCheckShimGenerator` now reuses _all_
   .ngtypecheck `ts.SourceFile` shims from build #1's type-check program in
   the construction of build #2's main program. Some of the contents of
   these files might be stale (if a component's template changed, for
   example), but wholesale reuse here prevents unnecessary changes in the
   contents of the program at this point and makes TypeScript's job a lot
   easier.

4. (Build #2 type-check program): For those input files which have not
   "logically changed" (meaning components within are semantically the same
   as they were before), the compiler will re-use the type-check file
   metadata from build #1, and _not_ generate a new .ngtypecheck shim.
   For components which have logically changed or where the previous
   .ngtypecheck contents cannot otherwise be reused, code generation happens
   as before.

PR Close #36211
2020-05-05 18:40:42 -07:00