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feat(ivy): reference external classes by their exported name (#27743)

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Previously, ngtsc would assume that a given directive/pipe being imported
from an external package was importable using the same name by which it
was declared. This isn't always true; sometimes a package will export a
directive under a different name. For example, Angular frequently prefixes
directive names with the 'ɵ' character to indicate that they're part of
the package's private API, and not for public consumption.

This commit introduces the TsReferenceResolver class which, given a
declaration to import and a module name to import it from, can determine
the exported name of the declared class within the module. This allows
ngtsc to pick the correct name by which to import the class instead of
making assumptions about how it was exported.

This resolver is used to select a correct symbol name when creating an
AbsoluteReference.

FW-517 #resolve
FW-536 #resolve

PR Close #27743
This commit is contained in:
Alex Rickabaugh
2018-12-18 11:09:21 -08:00
committed by Kara Erickson
parent 0b9094ec63
commit 1c39ad38d3
14 changed files with 332 additions and 128 deletions
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7
packages/compiler-cli/src/ngtsc/program.ts
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@ -16,7 +16,7 @@ import {ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecorato
import {BaseDefDecoratorHandler} from './annotations/src/base_def';
import {ErrorCode, ngErrorCode} from './diagnostics';
import {FlatIndexGenerator, ReferenceGraph, checkForPrivateExports, findFlatIndexEntryPoint} from './entry_point';
import {Reference} from './imports';
import {Reference, TsReferenceResolver} from './imports';
import {PartialEvaluator} from './partial_evaluator';
import {TypeScriptReflectionHost} from './reflection';
import {FileResourceLoader, HostResourceLoader} from './resource_loader';
@ -274,8 +274,9 @@ export class NgtscProgram implements api.Program {
private makeCompilation(): IvyCompilation {
const checker = this.tsProgram.getTypeChecker();
const evaluator = new PartialEvaluator(this.reflector, checker);
const scopeRegistry = new SelectorScopeRegistry(checker, this.reflector);
const refResolver = new TsReferenceResolver(this.tsProgram, checker, this.options, this.host);
const evaluator = new PartialEvaluator(this.reflector, checker, refResolver);
const scopeRegistry = new SelectorScopeRegistry(checker, this.reflector, refResolver);
// If a flat module entrypoint was specified, then track references via a `ReferenceGraph` in
// order to produce proper diagnostics for incorrectly exported directives/pipes/etc. If there