Currently undecorated classes are intentionally not processed with ngcc. This is causing unexpected behavior because decorator handlers such as `base_def.ts` are specifically interested in class definitions without top-level decorators, so that the base definition can be generated if there are Angular-specific class members. In order to ensure that undecorated base-classes work as expected with Ivy, we need to run the decorator handlers for all top-level class declarations (not only for those with decorators). This is similar to when `ngtsc` runs decorator handlers when analyzing source-files. Resolves FW-1355. Fixes https://github.com/angular/components/issues/16178 PR Close #30821
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