tree 991c5a19085ed5fba32d01ed83d98be2d4917d17
parent d1559a99b6b0a5325d5a5116361943b898a17a0c
author Stephen Adams <sra@google.com> 1677553218 +0000
committer Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> 1677553218 +0000

[dart2js] Implement `@pragma('dart2js:resource-identifier')`

Calls to methods annotated with `@pragma('dart2js:resource-identifier')` are tracked, with their primitive constant arguments, through to the `.js` file which contains the call.

- JavaScript annotations are attached to the JavaScript AST node for
  the call.

- At the time of `.js` file printing, the JavaScript annotations are
  collected and attributed to the file. This allows the construction
  of a map from `.js` files to the 'resource identifiers' contained in
  the file.

- Alongside the `main.js` file the resource identifiers are emitted in
  a file called `main.js.resources.json`. This is controlled by the
  `--write-resources` command line option.

- Serialization of JavaScript ASTs now serializes the attached
  JavaScript annotations.

- The internal method used to implement deferred library loading is
  annotated, to allow analysis of which deferred library parts load
  other libraries.
 pkg/js_ast was tweaked to make the pkg/js_ast was tweaked to make the
- pkg/js_ast was tweaked to make propagating the JavaScript annotations through the async transforms easier.


TODO:

- Annotate const constructors
- Add golden-style tests

Change-Id: Iea77550e22ee98f81dca61dfd713c09f734583d2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/284492
Reviewed-by: Nate Biggs <natebiggs@google.com>
Commit-Queue: Stephen Adams <sra@google.com>