This commit adds an API to `NgCompiler`, a method called `getComponentsWithTemplateFile`. Given a filesystem path to an external template file, it retrieves a `Set` (actually a `ReadonlySet`) of component declarations which are using this template. In most cases, this will only be a single component. This information is easily determined by the compiler during analysis, but is hard for a lot of Angular tooling (e.g. the language service) to infer independently. Therefore, it makes sense to expose this as a compiler API. PR Close #39002
Angular Compatibility Compiler (ngcc)
This compiler will convert node_modules compiled with ngc, into node_modules which
appear to have been compiled with ngtsc.
This conversion will allow such "legacy" packages to be used by the Ivy rendering engine.
Building
The project is built using Bazel:
yarn bazel build //packages/compiler-cli/ngcc
Unit Testing
The unit tests are built and run using Bazel:
yarn bazel test //packages/compiler-cli/ngcc/test
Integration Testing
There are tests that check the behavior of the overall executable:
yarn bazel test //packages/compiler-cli/ngcc/test:integration