angular-docs-cn/packages/compiler-cli/test/ngtsc/fake_core
Alex Rickabaugh dfdaaf6a0d fix(ivy): deduplicate directives in component scopes (#27462)
A previous fix to ngtsc opened the door for duplicate directives in
the 'directives' array of a component. This would happen if the directive
was declared in a module which was imported more than once within the
component's module.

This commit adds deduplication when the component's scope is materialized,
so declarations which arrive via more than one module import are coalesced.

PR Close #27462
2018-12-05 14:36:24 -08:00
..
BUILD.bazel build: update buildifier to latest (#24296) 2018-06-12 11:42:35 -07:00
README.md feat(ivy): first steps towards ngtsc mode (#23455) 2018-04-25 13:25:33 -07:00
index.ts fix(ivy): deduplicate directives in component scopes (#27462) 2018-12-05 14:36:24 -08:00
package.json feat(ivy): first steps towards ngtsc mode (#23455) 2018-04-25 13:25:33 -07:00

README.md

fake_core is a library designed to expose some of the same symbols as @angular/core, without requiring compilation of the whole of @angular/core. This enables unit tests for the compiler to be written without incurring long rebuilds for every change.

  • @angular/core is compiled with @angular/compiler-cli, and therefore has an implicit dependency on it. Therefore core must be rebuilt if the compiler changes.
  • Tests for the compiler which intend to build code that depends on @angular/core must have a data dependency on @angular/core. Therefore core must be built to run the compiler tests, and thus rebuilt if the compiler changes.

This rebuild cycle is expensive and slow. fake_core avoids this by exposing a subset of the @angular/core API, which enables applications to be built by the ngtsc compiler without needing a full version of core present at compile time.