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The linker is implemented using a Babel transform such that Babel needs to parse and walk a source file to find the declarations that need to be compiled. If it can be determined that a source file is known not to contain any declarations the parsing and walking can be skipped as a performance improvement. This commit adds an exposed function for tools that integrate the linker to use to allow short-circuiting of the linker transform. PR Close #40137 |
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| README.md | ||
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README.md
Angular Linker
This package contains a FileLinker and supporting code to be able to "link" partial declarations of components, directives, etc in libraries to produce the full definitions.
The partial declaration format allows library packages to be published to npm without exposing the underlying Ivy instructions.
The tooling here allows application build tools (e.g. CLI) to produce fully compiled components, directives, etc at the point when the application is bundled.
These linked files can be cached outside node_modules so it does not suffer from problems of mutating packages in node_modules.
Generally this tooling will be wrapped in a transpiler specific plugin, such as the provided Babel plugin.
Unit Testing
The unit tests are built and run using Bazel:
yarn bazel test //packages/compiler-cli/linker/test