1f73af77a7
Prior to this change, the `setClassMetadata` call would be invoked inside of an IIFE that was marked as pure. This allows the call to be tree-shaken away in production builds, as the `setClassMetadata` call is only present to make the original class metadata available to the testing infrastructure. The pure marker is problematic, though, as the `setClassMetadata` call does in fact have the side-effect of assigning the metadata into class properties. This has worked under the assumption that only build optimization tools perform tree-shaking, however modern bundlers are also able to elide calls that have been marked pure so this assumption does no longer hold. Instead, an `ngDevMode` guard is used which still allows the call to be elided but only by tooling that is configured to consider `ngDevMode` as constant `false` value. PR Close #39987
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