In version 0.6.1 that we are using, `source-map` ships with [its own typings][1], so there is no need to use `@types/source-map`. The types were even removed from `DefinitelyTyped` in DefinitelyTyped/DefinitelyTyped@1792bfaa2. [1]: https://github.com/mozilla/source-map/blob/0.6.1/package.json#L72 PR Close #31468
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