Commit Graph

18472 Commits

Author SHA1 Message Date
crisbeto 9322b9a060 fix(compiler): check more cases for pipe usage inside host bindings (#37883)
Builds on top of #34655 to support more cases that could be using a pipe inside host bindings (e.g. ternary expressions or function calls).

Fixes #37610.

PR Close #37883
2020-07-10 11:00:20 -07:00
Paul Gschwendtner 9bd4b74b06 feat(dev-infra): commit message validation should skip lines consisting of URLs (#37890)
The dev-infra commit message validation optionally can check for lines
to not exceed a given amount of characters. This is desired for most
commit messages, but sometimes not actionable if a long URL is inserted
into the commit message. With this commit, we skip the max line length
check for lines that start with an URL.

PR Close #37890
2020-07-10 10:59:28 -07:00
Paul Gschwendtner e6afcf1f94 build: split dev-infra configuration into individual files (#37890)
Splits the dev-infra configurations into individual files inside the
`.ng-dev/` folder. This helps with clarity as there is no single
configuration file that becomes extremely large and difficult to
maintain.

Additionally, more explicit configuration types are now used. This
fixed the max-line length setting for commit message validation.
This option is currently named incorrectly and a noop.

PR Close #37890
2020-07-10 10:59:28 -07:00
Paul Gschwendtner 4b4b74548d fix(dev-infra): include `bazel` utility files in npm package (#37891)
We recently added a new folder for common bazel utilities
to `dev-infra`. The `ng_rollup_bundle` rule relies on an
utility that is provided by this `bazel/` folder.

Unfortunately though it looks like this folder is currently
not included in the NPM package, so that the `ng_rollup_bundle`
rule does not work as expected. This commit fixes that by
including the bazel utilities in the NPM package.

PR Close #37891
2020-07-10 10:06:11 -07:00
Paul Gschwendtner 1550663b9e fix(bazel): ng_module rule does not expose flat module information in Ivy (#36971)
The `ng_module` rule supports the generation of flat module bundles. In
View Engine, information about this flat module bundle is exposed
as a Bazel provider. This is helpful as other rules like `ng_package`
could rely on this information to determine entry-points for the APF.

With Ivy this currently does not work because the flat module
information is not exposed in the provider. The reason for this is
unclear. We should also provide this information in Ivy so that rules
like `ng_package` can also determine the correct entry-points when a
package is built specifically with `--config=ivy`.

PR Close #36971
2020-07-09 22:11:17 +00:00
Advaith3600 c40cbecdd1 docs(animations): Added consistency in code examples (#37081)
PR Close #37081
2020-07-09 22:08:00 +00:00
Santosh Yadav 209a365511 docs: add explanation for providedIn any (#35283)
Angular 9 introduces a new value for providedIn called `any` which lets us use unique instance
for servicec in each lazy loaded module, this PR is to document the same

fixes #35179

PR Close #35283
2020-07-09 10:12:00 -07:00
George Kalpakas fb735d625b refactor(service-worker): use nominal type for normalized URLs (#37922)
Some ServiceWorker operations and methods require normalized URLs.
Previously, the generic `string` type was used.

This commit introduces a new `NormalizedUrl` type, a special kind of
`string`, to make this requirement explicit and use the type system to
enforce it.

PR Close #37922
2020-07-09 09:44:57 -07:00
George Kalpakas d19ef6534f fix(service-worker): correctly handle relative base href (#37922)
In some cases, it is useful to use a relative base href in the app (e.g.
when an app has to be accessible on different URLs, such as on an
intranet and the internet - see #25055 for a related discussion).

Previously, the Angular ServiceWorker was not able to handle relative
base hrefs (for example when building the with `--base-href=./`).

This commit fixes this by normalizing all URLs from the ServiceWorker
configuration wrt the ServiceWorker's scope.

Fixes #25055

PR Close #37922
2020-07-09 09:44:57 -07:00
George Kalpakas 667aba7508 test(service-worker): make mock implementations more similar to actual ones (#37922)
This commit makes the mock implementations used is ServiceWorker tests
behave more similar to the actual ones.

PR Close #37922
2020-07-09 09:44:57 -07:00
George Kalpakas d380e93b82 refactor(service-worker): move asset URL normalization to `Adapter` (#37922)
This is in preparation of enabling the ServiceWorker to handle
relative paths in `ngsw.json` (as discussed in #25055), which will
require normalizing URLs in other parts of the ServiceWorker.

PR Close #37922
2020-07-09 09:44:56 -07:00
George Kalpakas 2156beed0c fix(service-worker): correctly serve `ngsw/state` with a non-root SW scope (#37922)
The Angular ServiceWorker can serve requests to a special virtual path,
`ngsw/state`, showing [information about its internal state][1], which
can be useful for debugging.

Previously, this would only work if the ServiceWorker's [scope][2] was
the root directory (`/`). Otherwise, (e.g. when building the app with
`--baseHref=/some/path/`), the ServiceWorker would fail to detect a
request to `/some/path/ngsw/state` as matching `ngsw/state` and would
not serve it with the debugging information.

This commit fixes it by ensuring that the ServiceWorker's scope is taken
into account when detecting a request to `ngsw/state`.

[1]: https://angular.io/guide/service-worker-devops#locating-and-analyzing-debugging-information
[2]: https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerRegistration/scope

Fixes #30505

PR Close #37922
2020-07-09 09:44:56 -07:00
Abdellatif Ait boudad b98314e306 docs: add Formly library to the list of resources (#37257)
This commit adds the Formly library to the Angular list of resources at aio/content/marketing/resources.json.

PR Close #37257
2020-07-09 09:19:48 -07:00
Daniel e50c7dcc4c docs(router): get rid of unnecessary line in wildcard route example and fixing wildcard docregions (#37127)
The wildcard example leads to display a 404 page with the PageNotFoundComponent. But before, there is a wildcard to redirect to the FirstComponent and because of the routes order the FirstComponent will be displayed; which it is not the target of the wildcard route example code. Also, fixing some wildcard docregions
PR Close #37127
2020-07-08 16:04:51 -07:00
Paul Gschwendtner 6b731a067a test: fix test failure in saucelabs ivy ie10 (#37892)
One of the ivy acceptance tests currently fails in IE10. This
is because we recently added a new test that asserts that injecting
`ViewRef` results in a `NullInjectorError`.

Due to limitations in TypeScript and in polyfills for `setPrototypeOf`,
the error cannot be thrown as `ViewRef` is always considered injectable.
In reality, `ViewRef` should not be injectable, as explicitly noted
in c00f4ab2ae.

There seems no way to simulate the proper prototype chain in such
browsers that do not natively support `__proto__`, so TypeScript
and `core-js` polyfills simply break the prototype chain and
assign inherited properties directly on `ViewRef`. i.e. so that
`ViewRef.__NG_ELEMENT_ID__` exists and DI picks it up.

There is a way for TypeScript to theoretically generate proper
prototype chain in ES5 output, but they intend to only bother
about the proper prototype chain in ES6 where `setPrototypeOf`
etc. are offically standarized. See the response:

https://github.com/microsoft/TypeScript/issues/1601#issuecomment-94892833.

PR Close #37892
2020-07-08 16:03:33 -07:00
George Kalpakas 0a3dbc1e8a build(docs-infra): update @angular/cli to 10.0.1 (#37898)
This commit updates the version of Angular CLI used in angular.io to
version 10.0.1. It also reverts some changes (namely commits 38dfbc775f
and eee2fd22e0) which were made due to an older bug that is fixed in
the latest version. See #37688 for more details.

Fixes #37699

PR Close #37898
2020-07-08 16:02:46 -07:00
George Kalpakas b24a24ec58 refactor(docs-infra): avoid Material style duplication warning (#37898)
This commit removes some duplicate imports of Material themes and
theming-related utilities. While this change does not have any impact on
the size of the generated `styles.css` file, it silences a build warning
pointing to [Avoiding duplicated theming styles][1].

[1]: db4b0cd1bf/guides/duplicate-theming-styles.md

PR Close #37898
2020-07-08 16:02:46 -07:00
George Kalpakas 13ef5d6c7d build(docs-infra): update @angular/material to 10.0.1 (#37898)
This commit updates the version of Angular Components used in angular.io
to version 10.0.1. It also updates the angular.io app to adapt to
breaking changes.

PR Close #37898
2020-07-08 16:02:46 -07:00
George Kalpakas 54373cc895 build(docs-infra): update @angular/core to 10.0.2 (#37898)
This commit updates the version of Angular framework used in angular.io
to version 10.0.2. It also features a commit message with a 100+ chars
long body.

PR Close #37898
2020-07-08 16:02:46 -07:00
pkozlowski-opensource bbe3543c69 refactor(core): remove duplicated WrappedValue class (#37940)
Before this refactoring we had the WrappedValue class in
2 separate places:
- packages/core/src/change_detection/change_detection_util.ts
- packages/core/src/util/WrappedValue.ts

This commit removes the duplicate, leaving the class that has
the deprecation notice.

PR Close #37940
2020-07-08 16:02:16 -07:00
Kapunahele Wong bdbbff6a1a docs: break testing doc into multiple docs (#37957)
This commit breaks up the testing document into nine total documents, with each document focusing on an existing section of the current testing documentation. There are no content changes.

PR Close #37957
2020-07-08 16:01:49 -07:00
tphobe9312 f81d3f6199 docs(elements): fix typo (you custom element --> your custom element) (#37966)
PR Close #37966
2020-07-08 16:01:22 -07:00
Igor Minar d0c0f25a48 ci: decrease the minBodyLength commit message limit to 20 chars (#37949)
The motivation behind this change is to improve the productivity in the angular/angular repo
without sacrificing the original goal of having better understanding of changes within
the repo.

When the minBodyLength limit was originally introduced the goal was simple: force
committers to provide more contextual information for each change coming into the
repo. Too often we found ourselves in a situation where nobody understood what
motivated some of the changes and we needed more contextual info to know if the
change was correct, desirable, and still relevant (at a later point in time).

When the limit was introduced, we needed to pick a minimum body length - given no
data, and frustration with even big changes being committed with just a words in
the subject (along the lines of "fix(core): fixing a bug"), we overcompensated
and started off with a really high bar of minBodyLength set to 100 chars.

This turned out to be impractical and created a big friction point in making valid
changes in the angular/angular repo, and in fact caused some of the refactorings
and smaller changes to be either skipped or combined into other commits which
increased the burden for code reviewers.

The evidence in the friction points can be seen in the number of PRs that fail to pass
the current lint check on the first try, but more importantly also in the "creative"
writing that some of the committers are forced to resort to in order to satisfy the
current checks. Examples:

- 286fbf42c6
- b2816a1536

Given that we primarily care to document the motivation behind each change
(the answer to the ultimate question: WHY?), I've collected several *common* &
*valid* commit messages that are minimalistic and capture the WHY sufficiently:

```
Refactoring for readability.  => 28 chars
Improving variable naming.    => 26 chars
Additional test coverage.     => 25 chars
Cleaning up the code.         => 21 chars
Simplified the code.          => 20 chars
```

These commit message bodies in addition to the commit message subject should
sufficiently satisfy the need to capture the context and motivation behind each
change without creating an undue burden on committers.

Example minimalistic commit message:

------

refactor(core): cleanup the expression parser

Simplifying the code.

----

Given this research, I'm decreasing the minBodyLenth in angular/angular to 20 chars.

The commit message quality can be additionally improved by implementing a commit message
template via `.gitmessage` that will guide the committers in following our commit message
guidelines via instructions provided in the form of in-the-flow help rather than as an after
the fact lint check.

More info: https://thoughtbot.com/blog/better-commit-messages-with-a-gitmessage-template

I'm intentionally deferring such change for a separate PR as not to complicate or delay the
minBodyLength limit decrease.

PR Close #37949
2020-07-08 15:43:02 -07:00
Alex Rickabaugh 1f796e9479 release: cut the v10.1.0-next.0 release 2020-07-08 14:21:29 -07:00
Alex Rickabaugh 1237d9cbea docs: release notes for the v10.0.3 release 2020-07-08 14:00:58 -07:00
Alex Rickabaugh b3969e9654 docs: release notes for the v9.1.12 release 2020-07-08 13:40:27 -07:00
Olivier Combe 6eb868b63a build(compiler-cli): fix bazel deps rules for ngtsc testing packages (#37977)
The ngtsc testing packages for file_system and logging were missing from the bazel deps rules, which means that they were not included in the releases

PR Close #37977
2020-07-08 12:05:22 -07:00
Paul Gschwendtner 82a2207f4a build: filter out duplicate cherry-picked commits in changelog (#37956)
Often changelogs are generated from the patch branch and then
cherry-picked into the `CHANGELOG.md` file in `master` for
better access and readability. This is problematic though as
`conventional-changelog` (the tool we use for generating the
changelog), will duplicate commits when a future changelog
is generated from `master` then (i.e. for a new minor release).

This happens because conventional-changelog always generates the
changelog from the latest tag in a given branch to `HEAD`. The
tag in the patch branch does not correspond to any SHA in `master`
so the intersection of commits is not automatically omitted.

We work around this naively (until we have a better tool provided
by dev-infra), by deduping commits that are already part of the
changelog. This has proven to work as expected in the components
repo.

PR Close #37956
2020-07-08 12:04:46 -07:00
George Kalpakas 289a96b078 docs: minor fixes to docs related to updating to v10 (#37897)
This commit includes a couple of minor fixes to docs related to updating
to v10:
- Fix markdown link in "Updating to Angular version 10" guide.
- Correctly display numbered list in
  "Solution-style `tsconfig.json` migration" guide.

PR Close #37897
2020-07-07 12:17:04 -07:00
Paul Gschwendtner cb2ab26296 feat(dev-infra): merge script should link to original commit when cherry-picking with API strategy (#37889)
The merge script uses `git cherry-pick` for both the API merge strategy
and the autosquash strategy. It uses cherry-pick to push commits to
different target branches (e.g. into the `10.0.x` branch).

Those commits never point to the commits that landed in the primary
Github branch though. For the autosquash strategy the pull request number
is always included, so there is a way to go back to the source. On the other
hand though, for commits cherry-picked in the API merge strategy, the
pull request number might not always be included (due to Github's
implementation of the rebase merge method).

e.g.
27f52711c0

For those cases we'd want to link the cherry-picked commits to the
original commits so that the corresponding PR is easier to track
down. This is not needed for the autosquash strategy (as outlined
before), but it would have been good for consistency. Unfortunately
though this would rather complicate the strategy as the autosquash
strategy cherry-picks directly from the PR head, so the SHAs that
are used in the primary branch are not known.

PR Close #37889
2020-07-07 12:16:21 -07:00
George Kalpakas 79850983e6 fix(docs-infra): prevent search-bar from overlapping nav-items (#37938)
As part of angular.io's responsive layout, the menu shown in the top-bar
is collapsed into the sidenav on narrow screens at the point where the
search-bar (on the right side of the top-bar) would overlap with the
menu's nav-items.

Previously, the value used as break-point would work on marketing pages,
where the hamburger button is not shown on wide screens. However, on
docs pages (where the hamburger button is always shown, pushing the menu
further to the right), the search-bar would still overlap the menu
nav-items on some resolutions.

This commit fixes it by raising the screen width threshold at a value
that ensures there is no overlap even on pages where the hamburger
button is visible alongside the top-bar menu.

Fixes #37937

PR Close #37938
2020-07-06 13:57:37 -07:00
George Kalpakas fc7e77934f refactor(docs-infra): decouple showing the top-menu in top-bar from showing the sidenav (#37938)
As part of angular.io's responsive layout, the following rules are
applied:
- On wide screens, a menu is shown in the top-bar and the sidenav is
  shown side-by-side with the docs content.
- On narrow screens, the top-menu is moved from the top-bar to the
  sidenav and the sidenav is closed by default and floats over the
  content when manually opened.

Previously, the break-points at which the top-menu was shown in the
top-bar and the sidenav was shown side-by-side with the content were the
same (using a single variable).

This commit decouples the two break-points to make it possible to use
different values in the future.

PR Close #37938
2020-07-06 13:57:37 -07:00
George Kalpakas 90b93da743 refactor(docs-infra): use Sass variable for top-bar hamburger button show/hide threshold (#37938)
Use a Sass variable for the screen width break-point at which the
top-bar hamburger button is hidden/shown. This allows more easily
updating the break-point.

PR Close #37938
2020-07-06 13:57:37 -07:00
Pete Bacon Darwin ec32eba02c feat(localize): expose `canParse()` diagnostics (#37909)
When loading a translation file we ask each `TranslationParser`
whether it can parse the file. Occasionally, this check can find
errors in the file that would be useful to the developer. For example
if the file has invalid XML.

This commit deprecates the previous `canParse()` method and replaces it
with a new `analyze()` method. This returns an object that includes a
boolean `canParse` and then either a `hint` if it can parse the file,
or a `diagnostics` object filled with any messages that can be used to
diagnose problems with the format of the file.

Closes #37901

PR Close #37909
2020-07-06 13:56:39 -07:00
George Kalpakas 596fbb3f06 build(docs-infra): improve applying post-install patches (#37896)
In `aio/`, we have a mechanism to apply patches in a `postinstall` hook.
See `aio/tools/cli-patches/README.md` for more info.

Previously, we had to update `aio/tools/cli-patches/patch.js` to list
each `.patch` file separately. While working on #37688, I found it
helpful for the script to automatically pick up `.patch` files.

This commit updates the script to automatically pick up and apply
`.patch` files from the `aio/tools/cli-patches/` directory. If one wants
to keep a `.patch` file but not apply it, they can change the file's
extension or move it to a sub-directory (without having to update the
script).

PR Close #37896
2020-07-06 13:56:15 -07:00
Andrew Kushnir aed6b131bb fix(core): handle spaces after `select` and `plural` ICU keywords (#37866)
Currently when the `plural` or `select` keywords in an ICU contain trailing spaces (e.g. `{count, select , ...}`), these spaces are also included into the key names in ICU vars (e.g. "VAR_SELECT "). These trailing spaces are not desirable, since they will later be converted into `_` symbols while normalizing placeholder names, thus causing mismatches at runtime (i.e. placeholder will not be replaced with the correct value). This commit updates the code to trim these spaces while generating an object with placeholders, to make sure the runtime logic can replace these placeholders with the right values.

PR Close #37866
2020-07-06 13:55:47 -07:00
Andrew Kushnir d148fdccf2 fix(dev-infra): fix typo in ng-dev config (#37862)
The logic to exclude certain types of commits (specifically 'docs' ones) was implemented in c5b125b7db. The ng-dev config was updated in the followup commit acf3cff9ee, but there was a typo that prevented the new logic from being activated. This commit updates the name of the config option in the ng-dev config to the right one (minBodyLengthTypeExcludes).

PR Close #37862
2020-07-06 13:55:18 -07:00
Ruben Schuckit 1801d0c650 fix(router): properly compare array queryParams for equality (#37709) (#37860)
queryParams will be judged different if the arrays do not contain the same frequency of elements and the same otherwise.

PR Close #37860
2020-07-06 13:50:32 -07:00
Omar Hasan a5c30733cb docs: mention for depreciation for `Testbed.get()` (#37815)
As mention in https://angular.io/guide/deprecations for this API, it may be important mention for this to make developers migrate or avoid using it

PR Close #37815
2020-07-06 13:42:27 -07:00
Dmitrij Kuba d7dd2959c8 perf(router): apply prioritizedGuardValue operator to optimize CanLoad guards (#37523)
CanLoad guards are processed in asynchronous manner with the following rules:
* If all guards return `true`, operator returns `true`;
* `false` and `UrlTree` values wait for higher priority guards to resolve;
* Highest priority `false` or `UrlTree` value will be returned.

`prioritizedGuardValue` uses `combineLatest` which in order subscribes to each Observable immediately (not waiting when previous one completes that `concatAll` do). So it makes some advantages in order to run them concurrently. Respectively, a time to resolve all guards will be reduced.

PR Close #37523
2020-07-06 13:41:11 -07:00
Andrew Scott a5ffca0576 fix(router): fix navigation ignoring logic to compare to the browser url (#37716)
This PR changes the logic for determining when to skip route processing from
using the URL of the last attempted navigation to the actual resulting URL after
that transition.

Because guards may prevent navigation and reset the browser URL, the raw
URL of the previous transition may not match the actual URL of the
browser at the end of the navigation process. For that reason, we need to use
`urlAfterRedirects` instead.

Other notes:
These checks in scheduleNavigation were added in eb2ceff4ba
The test still passes and, more surprisingly, passes if the checks are removed
completely. There have likely been changes to the navigation handling that
handle the test in a different way. That said, it still appears to be important
to keep the checks there in some capacity because it does affect how many
navigation events occur. This addresses an issue that came up in #16710: https://github.com/angular/angular/issues/16710#issuecomment-634869739
This also partially addresses #13586 in fixing history for imperative
navigations that are cancelled by guards.

PR Close #37716
2020-07-06 09:38:10 -07:00
Judy Bogart 196bfa8fae docs: restore link to lightweight token page in left nav (#37855)
After recent correction to left nav TOC, the link to this new page was temporarily removed. This restores it to next, because the page is not yet available in stable.

PR Close #37855
2020-07-01 11:55:36 -07:00
Celilsemi Sam Erkiner 1d5ca55aab docs(changelog): remove empty sections (#36264)
The changelog contains some empty sections (such as `### Bug Fixes`). This change removes these empty sections.

PR Close #36264
2020-07-01 09:22:56 -07:00
Celilsemi Sam Erkiner e0033f1e10 docs(changelog): remove duplicate entries (#36264)
Remove duplicate entries in the changelog, keeping only the earliest instance of changes that appear multiple times.

PR Close #36264
2020-07-01 09:22:56 -07:00
Judy Bogart 9206a26e1d docs: clean up api doc in core (#37053)
Add introductions to usage examples and edit descriptions to be more complete and consistent with current API reference styles

PR Close #37053
2020-06-30 12:11:15 -07:00
Alan Agius 11dd2bef2d docs: add missing single quote (#37854)
The current code is missing a single quote at the end of the import.

(cherry picked from commit e13171ea2960dd0fa0666cb964b53799d2883e3a)

PR Close #37854
2020-06-30 12:10:13 -07:00
Andrew Kushnir 6fc80690ae docs: release notes for the v10.0.2 release 2020-06-30 11:57:17 -07:00
Sonu Kapoor f6d2705942 docs: add Sonu Kapoor to the collaborator list (#37777)
After 6 months of continuous contributions, Sonu Kapoor did finally make
it into the collaborator list.

PR Close #37777
2020-06-30 10:47:54 -07:00
Alan Agius 79dc14199b docs: update `/config/app-package-json` redirect (#37774)
With this change we change the redirect for `/config/app-package-json` from `https://webpack.js.org/configuration/optimization/#optimizationsideeffects` to `https://angular.io/guide/strict-mode#non-local-side-effects-in-applications`

The latter page has more details.

PR Close #37774
2020-06-30 10:45:52 -07:00
Alex Rickabaugh 71956250dd perf(compiler-cli): fix memory leak in retained incremental state (#37835)
Incremental compilation allows for the output state of one compilation to be
reused as input to the next compilation. This involves retaining references
to instances from prior compilations, which must be done carefully to avoid
memory leaks.

This commit fixes such a leak with a complicated retention chain:

* `TrackedIncrementalBuildStrategy` unnecessarily hangs on to the previous
  `IncrementalDriver` (state of the previous compilation) once the current
  compilation completes.

  In general this is unnecessary, but should be safe as long as the chain
  only goes back one level - if the `IncrementalDriver` doesn't retain any
  previous `TrackedIncrementalBuildStrategy` instances. However, this does
  happen:

* `NgCompiler` indirectly causes retention of previous `NgCompiler`
  instances (and thus previous `TrackedIncrementalBuildStrategy` instances)
  through accidental capture of the `this` context in a closure created in
  its constructor. This closure is wrapped in a `ts.ModuleResolutionCache`
  used to create a `ModuleResolver` class, which is passed to the program's
  `TraitCompiler` on construction.

* The `IncrementalDriver` retains a reference to the `TraitCompiler` of the
  previous compilation, completing the reference chain.

The final retention chain thus looks like:

* `TrackedIncrementalBuildStrategy` of current program
* `.previous`: `IncrementalDriver` of previous program
* `.lastGood.traitCompiler`: `TraitCompiler`
* `.handlers[..].moduleResolver.moduleResolutionCache`: cache
* (via `getCanonicalFileName` closure): `NgCompiler`
* `.incrementalStrategy`: `TrackedIncrementalBuildStrategy` of previous
  program.

The closure link is the "real" leak here. `NgCompiler` is creating a closure
for `getCanonicalFileName`, delegating to its
`this.adapter.getCanonicalFileName`, for the purposes of creating a
`ts.ModuleResolutionCache`. The fact that the closure references
`NgCompiler` thus eventually causes previous `NgCompiler` iterations to be
retained. This is also potentially problematic due to the shared nature of
`ts.ModuleResolutionCache`, which is potentially retained across multiple
compilations intentionally.

This commit fixes the first two links in the retention chain: the build
strategy is patched to not retain a `previous` pointer, and the `NgCompiler`
is patched to not create a closure in the first place, but instead pass a
bound function. This ensures that the `NgCompiler` does not retain previous
instances of itself in the first place, even if the build strategy does
end up retaining the previous incremental state unnecessarily.

The third link (`IncrementalDriver` unnecessarily retaining the whole
`TraitCompiler`) is not addressed in this commit as it's a more
architectural problem that will require some refactoring. However, the leak
potential of this retention is eliminated thanks to fixing the first two
issues.

PR Close #37835
2020-06-29 16:34:51 -07:00