This commit introduces a new interface, which abstracts access to the underlying `FileSystem`. There is initially one concrete implementation, `NodeJsFileSystem`, which is simply wrapping the `fs` library of NodeJs. Going forward, we can provide a `MockFileSystem` for test, which should allow us to stop using `mock-fs` for most of the unit tests. We could also implement a `CachedFileSystem` that may improve the performance of ngcc. PR Close #29643
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