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feat(ivy): exclude declarations from injector imports (#29598)

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Prior to this change, a module's imports and exports would be used verbatim
as an injectors' imports. This is detrimental for tree-shaking, as a
module's exports could reference declarations that would then prevent such
declarations from being eligible for tree-shaking.

Since an injector actually only needs NgModule references as its imports,
we may safely filter out any declarations from the list of module exports.
This makes them eligible for tree-shaking once again.

PR Close #29598
This commit is contained in:
JoostK
2019-03-30 13:09:45 +01:00
committed by Jason Aden
parent 45c6360e5a
commit 2d372f48db
6 changed files with 90 additions and 11 deletions
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4
packages/compiler/src/render3/r3_module_compiler.ts
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@ -191,7 +191,7 @@ export interface R3InjectorMetadata {
type: o.Expression;
deps: R3DependencyMetadata[]|null;
providers: o.Expression;
imports: o.Expression;
imports: o.Expression[];
}
export function compileInjector(meta: R3InjectorMetadata): R3InjectorDef {
@ -204,7 +204,7 @@ export function compileInjector(meta: R3InjectorMetadata): R3InjectorDef {
const expression = o.importExpr(R3.defineInjector).callFn([mapToMapExpression({
factory: result.factory,
providers: meta.providers,
imports: meta.imports,
imports: o.literalArr(meta.imports),
})]);
const type =
new o.ExpressionType(o.importExpr(R3.InjectorDef, [new o.ExpressionType(meta.type)]));