feat: improve rules_js parity

npm/BUILD.bazel

@@ -0,0 +1,22 @@
+load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
+
+package(default_visibility = ["//visibility:public"])
+
+exports_files([
+    "extensions.bzl",
+    "repositories.bzl",
+])
+
+bzl_library(
+    name = "extensions_bzl",
+    srcs = ["extensions.bzl"],
+    visibility = ["//visibility:public"],
+    deps = ["//internal:bun_install_bzl"],
+)
+
+bzl_library(
+    name = "repositories_bzl",
+    srcs = ["repositories.bzl"],
+    visibility = ["//visibility:public"],
+    deps = ["//internal:bun_install_bzl"],
+)

npm/extensions.bzl

@@ -0,0 +1,28 @@
+load("//internal:bun_install.bzl", "bun_install_repository")
+
+_translate = tag_class(
+    attrs = {
+        "name": attr.string(mandatory = True),
+        "package_json": attr.label(mandatory = True),
+        "lockfile": attr.label(mandatory = True),
+        "install_inputs": attr.label_list(allow_files = True),
+        "isolated_home": attr.bool(default = True),
+    },
+)
+
+def _npm_translate_lock_impl(ctx):
+    for mod in ctx.modules:
+        for install in mod.tags.translate:
+            bun_install_repository(
+                name = install.name,
+                package_json = install.package_json,
+                bun_lockfile = install.lockfile,
+                install_inputs = install.install_inputs,
+                isolated_home = install.isolated_home,
+                visible_repo_name = install.name,
+            )
+
+npm_translate_lock = module_extension(
+    implementation = _npm_translate_lock_impl,
+    tag_classes = {"translate": _translate},
+)

npm/repositories.bzl

@@ -0,0 +1,11 @@
+load("//internal:bun_install.bzl", "bun_install_repository")
+
+def npm_translate_lock(name, package_json, lockfile, install_inputs = [], isolated_home = True):
+    bun_install_repository(
+        name = name,
+        package_json = package_json,
+        bun_lockfile = lockfile,
+        install_inputs = install_inputs,
+        isolated_home = isolated_home,
+        visible_repo_name = name,
+    )