This is the final patch to migrate the Angular styling code to have a
smaller instruction set in preparation for the runtime refactor. All
styling-related instructions now work both in template and hostBindings
functions and do not use `element` as a prefix for their names:
BEFORE:
elementStyling()
elementStyleProp()
elementClassProp()
elementStyleMap()
elementClassMap()
elementStylingApply()
AFTER:
styling()
styleProp()
classProp()
styleMap()
classMap()
stylingApply()
PR Close#30318
This patch removes all host-specific styling instructions in favor of
using element-level instructions instead. Because of the previous
patches that made sure `select(n)` worked between styling calls, all
host level instructions are not needed anymore. This patch changes each
of those instruction calls to use any of the `elementStyling*`,
`elementStyle*` and `elementClass*` styling instructions instead.
PR Close#30336
This patch is one commit of many patches that will unify all styling instructions
across both template-level bindings and host-level bindings. This patch in particular
removes the `elementIndex` param because it is already set prior to each styling
instruction via the `select(n)` instruction.
PR Close#30313
Prior to this patch, the `select(n)` instruction would only be generated
when property bindings are encountered which meant that styling-related
bindings were skipped. This patch ensures that all styling-related bindings
(i.e. class and style bindings) are always prepended with a `select()`
instruction prior to being generated in AOT.
PR Close#30311
This patch breaks up the existing `elementStylingMap` into
`elementClassMap` and `elementStyleMap` instructions. It also breaks
apart `hostStlyingMap` into `hostClassMap` and `hostStyleMap`
instructions. This change allows for better tree-shaking and reduces
the complexity of the styling algorithm code for `[style]` and `[class]`
bindings.
PR Close#30293
If an entry-point has a missing dependency then all the entry-points
that would have pointed to that dependency are also removed from
the dependency graph.
Previously we were still processing the dependencies of an entry-point
even if it had already been removed from the graph because it depended
upon a missing dependency that had previously been removed due to another
entry-point depending upon it.
This caused the dependency processing to crash rather than gracefully
logging and handling the missing invalid entry-point.
Fixes#29624
PR Close#30270
Sometimes we need to override module resolution behaviour.
We do this by implementing the optional method `resolveModuleNames()`
on `CompilerHost`.
This commit ensures that we always try this method first before falling
back to the standard `ts.resolveModuleName`
PR Close#30017
Packages that do not follow APF may have the declaration files in the same
directory as one source format, typically ES5. This is problematic for ngcc,
as it needs to create a TypeScript program with all JavaScript sources of
an entry-point, whereas TypeScript's module resolution mechanism would have
resolved an internal module import to the external facing .d.ts declaration
file, instead of the JavaScript source file. This behavior results in the
program to be analysed being incomplete.
This commit introduces a custom compiler host that recognizes the above
scenario and rewires the resolution of a .d.ts declaration file to its
JavaScript counterpart, if applicable.
Fixes#29939
PR Close#30017
Fixes `HostBinding` and `HostListener` declarations not being inherited from base classes that don't have an Angular decorator.
This PR resolves FW-1275.
PR Close#30158
This commit introduces a new interface, which abstracts access
to the underlying `FileSystem`. There is initially one concrete
implementation, `NodeJsFileSystem`, which is simply wrapping the
`fs` library of NodeJs.
Going forward, we can provide a `MockFileSystem` for test, which
should allow us to stop using `mock-fs` for most of the unit tests.
We could also implement a `CachedFileSystem` that may improve the
performance of ngcc.
PR Close#29643
By passing a `pathMappings` configuration (a subset of the
`ts.CompilerOptions` interface), we can instuct ngcc to process
additional paths outside the `node_modules` folder.
PR Close#29643
When working out the dependencies between entry-points
ngcc must parse the import statements and then resolve the
import path to the actual file. This is complicated because module
resolution is not trivial.
Previously ngcc used the node.js `require.resolve`, with some
hacking to resolve modules. This change refactors the `DependencyHost`
to use a new custom `ModuleResolver`, which is optimized for this use
case.
Moreover, because we are in full control of the resolution,
we can support TS `paths` aliases, where not all imports come from
`node_modules`. This is the case in some CLI projects where there are
compiled libraries that are stored locally in a `dist` folder.
See //FW-1210.
PR Close#29643
Previously we completely ignored entry-points that had not been
compiled with Angular, since we do not need to compile them
with ngcc. But this makes it difficult to reason about dependencies
between entry-points that were compiled with Angular and those that
were not.
Now we do track these non-Angular compiled entry-points but they
are marked as `compiledByAngular: false`.
PR Close#29643
The test now attempts to compile an entry-point (@angular/common/http/testing)
that has a transient "private" dependency. A private dependency is one that is
only visible by looking at the compiled JS code, rather than the generated TS
typings files.
This proves that we can't rely on typings files alone for computing the
dependencies between entry-points.
PR Close#29643
The `Transformer` and `Renderer` classes do not
actually need a `sourcePath` value as by the time
they are doing their work we are only working directly
with full absolute paths.
PR Close#29643
- Extracts and documents code that will be common to interpolation instructions
- Ensures that binding indices are updated at the proper time during compilation
- Adds additional tests
Related #30011
PR Close#30129
Previously, ngtsc included query fields in the list of fields which can
affect the type of a directive via its type constructor. This feature
however has yet to be built, and View Engine in default mode does not
do this inference.
This caused an unexpected bug where private query fields (which should be
an error but are allowed by View Engine) cause the type constructor
signature to be invalid. This commit fixes that issue by disabling the
logic to include query fields.
PR Close#30094
ngtsc generates type constructors which infer the type of a directive based
on its inputs. Previously, a bug existed where this inference would fail in
the case of 'any' input values. For example, the inference of NgForOf fails
when an 'any' is provided, as it causes TypeScript to attempt to solve:
T[] = any
In this case, T gets inferred as {}, the empty object type, which is not
desirable.
The fix is to assign generic types in type constructors a default type of
'any', which TypeScript uses instead of {} when inference fails.
PR Close#30094
ngtsc previously could attempt to reuse the main ts.Program twice. This
occurred when template type-checking was enabled and then an incremental
build was performed. This breaks a TypeScript invariant - ts.Programs can
only be reused once.
The creation of the template type-checking program reuses the main program,
rendering it moot. Then, on the next incremental build the main program
would be subject to reuse again, which would crash inside TypeScript.
This commit fixes the issue by reusing the template type-checking program
from the previous run on the next incremental build. Since under normal
circumstances the files in the type-checking program aren't changed, this
should be just as fast.
Testing strategy: a test is added in the incremental_spec which validates
that program reuse with type-checking turned on does not crash the compiler.
Fixes#30079
PR Close#30090
Only the JS files that are actually part of the entry-point
should be copied to the new entry-point folder in the
`NewEntryPointFileWriter`.
Previously some typings and external JS files were
being copied which was messing up the node_modules
structure.
Fixes https://github.com/angular/angular-cli/issues/14193
PR Close#30085
Fixes view and content queries not being inherited in Ivy, if the base class hasn't been annotated with an Angular decorator (e.g. `Component` or `Directive`).
Also reworks the way the `ngBaseDef` is created so that it is added at the same point as the queries, rather than inside of the `Input` and `Output` decorators.
This PR partially resolves FW-1275. Support for host bindings will be added in a follow-up, because this PR is somewhat large as it is.
PR Close#30015
Prior to this commit, the check that verifies correct "id" field type was too strict and didn't allow `module.id` as @NgModule's "id" field value. This change adds a special handling for `module.id` and uses it as id of @NgModule if specified.
PR Close#30040
Now that ngtsc performs type checking using a dedicated `__ng_typecheck__.ts`
file, `NgtscProgram` always wraps its `ts.CompilerHost` in a shim host. This
shim fails to delegate `resolveModuleNames` so no custom module resolution
logic is considered. This introduces a problem for the CLI, as the compiler
host it passes kicks of ngcc for any imported module such that Ivy's
compatibility compiler runs automatically behind the scenes.
This commit adds delegation of the `resolveModuleNames` to fix the issue.
Fixes#30064
PR Close#30068
The compiler uses metadata to represent what it statically knows about
various expressions in a program. Occasionally, expressions in the program
for which metadata is extracted may contain sub-expressions which are not
representable in metadata. One such construct is an arrow function.
The compiler does not always need to understand such expressions completely.
For example, for a provider defined with `useValue`, the compiler does not
need to understand the value at all, only the outer provider definition. In
this case, the compiler employs a technique known as "expression lowering",
where it rewrites the provider expression into one that can be represented
in metadata. Chiefly, this involves extracting out the dynamic part (the
`useValue` expression) into an exported constant.
Lowering is applied through a heuristic, which considers the containing
statement as well as the field name of the expression.
Previously, this heuristic was not completely accurate in the case of
route definitions and the `loadChildren` field, which is lowered. If the
route definition using `loadChildren` existed inside a decorator invocation,
lowering was performed correctly. However, if it existed inside a standalone
variable declaration with an export keyword, the heuristic would conclude
that lowering was unnecessary. For ordinary providers this is true; however
the compiler attempts to fully understand the ROUTES token and thus even if
an array of routes is declared in an exported variable, any `loadChildren`
expressions within still need to be lowered.
This commit enables lowering of already exported variables under a limited
set of conditions (where the initializer expression is of a specific form).
This should enable the use of `loadChildren` in route definitions.
PR Close#30038
Previously, a template's context name would only be included in an embedded
template function if the element that the template was declared on has a
tag name. This is generally true for elements, except for `ng-content`
that does not have a tag name. By omitting the context name the compiler
could introduce duplicate template function names, which would fail at runtime.
This commit fixes the behavior by always including the context name in the
template function's name, regardless of tag name.
Resolves FW-1272
PR Close#30025
Previously, ngcc would insert new imports at the beginning of the file, for
convenience. This is problematic for imports that have side-effects, as the
side-effects imposed by such imports may affect the behavior of subsequent
imports.
This commit teaches ngcc to insert imports after any existing imports. Special
care has been taken to ensure inserted constants will still follow after the
inserted imports.
Resolves FW-1271
PR Close#30029
Fixes Ivy throwing an error because it tries to generate styling instructions for empty `style` and `class` bindings.
This PR resolves FW-1274.
PR Close#30024
Previously, all of a program's files would be copied into the __ivy_ngcc__
folder where ngcc then writes its modifications into. The set of source files
in a program however is much larger than the source files contained within
the entry-point of interest, so many more files were copied than necessary.
Even worse, it may occur that an unrelated file in the program would collide
with an already existing source file, resulting in incorrectly overwriting
a file with unrelated content. This behavior has actually been observed
with @angular/animations and @angular/platform-browser/animations, where
the former package would overwrite declaration files of the latter package.
This commit fixes the issue by only copying relevant source files when cloning
a bundle's content into __ivy_ngcc__.
Fixes#29960
PR Close#30020
Previously, during the evaluation of a function call where no argument
was provided for a parameter that has a default value, the default value
would be taken from the context of the caller, instead of the callee.
This commit fixes the behavior by resolving the default value of a
parameter in the context of the callee.
PR Close#29888
Previously, ngtsc's static evaluator did not take spread operators into
account when evaluating function calls, nor did it handle rest arguments
correctly. This commit adds support for static evaluation of these
language features.
PR Close#29888
Template type-checking is enabled by default in the View Engine compiler.
The feature in Ivy is not quite ready for this yet, so this flag will
temporarily control whether templates are type-checked in ngtsc.
The goal is to remove this flag after rolling out template type-checking in
google3 in Ivy mode, and making sure the feature is as compatible with the
View Engine implementation as possible.
Initially, the default value of the flag will leave checking disabled.
PR Close#29698
Matias Niemelä
Pete Bacon Darwin
Alan
Filipe Silva
JoostK
Kristiyan Kostadinov
MaksPob
Ben Lesh
Alex Rickabaugh
Andrew Kushnir