Introduces a rule that collects declared JavaScript module output files
from a list of dependencies based on a configurable JavaScript module
provider. The extracted outputs are exposed within the `DefaultInfo` provider.
Targets defined using this rule can be used as input for rules that
require JavaScript sources, or if there are multiple JavaScript output
variants defined for a target while for example only the `JSModuleInfo`
outputs are of interest.
As an example: This rule is helpful in combination with `ts_library` and
`ng_module` as those rule expose multiple output flavors (which are
distinguishable by the JavaScript module providers as imported from `providers.bzl`).
i.e. these rules expose flavors for named AMD modules and ECMAScript module output.
If we want to ship a NPM package only using ECMAScript modules for
example, we could extract all `JSEcmaScriptModuleInfo`-denoted output
and feed that into the `pkg_npm` rule, compared to bringing in all
output flavors.
For reference:
https://github.com/bazelbuild/rules_nodejs/blob/stable/packages/typescript/internal/build_defs.bzl#L334-L337
PR Close#42809
Paul Gschwendtner