Paul Gschwendtner 9af5abba86 feat(dev-infra): add bazel rule for extracting JavaScript module flavors from targets (#42809)
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
2021-07-12 09:42:01 -07:00

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Python

package(default_visibility = ["//visibility:public"])
filegroup(
name = "files",
srcs = [
"BUILD.bazel",
"expand_template.bzl",
"extract_js_module_output.bzl",
"//dev-infra/bazel/api-golden:files",
"//dev-infra/bazel/browsers:files",
"//dev-infra/bazel/remote-execution:files",
],
)