fix: esm5_sources rule (wip not yet working)

packages/bazel/src/esm5.bzl

@@ -12,7 +12,7 @@ However we need to publish this flavor on NPM, so it's necessary to be able
 to produce it.
 """
 
-load(":external.bzl", "DEFAULT_NG_COMPILER")
+load(":external.bzl", "DEFAULT_NG_COMPILER", "JSEcmaScriptModuleInfo")
 
 # The provider downstream rules use to access the outputs
 ESM5Info = provider(
@@ -214,10 +214,32 @@ def flatten_esm5(ctx):
         rerooted_file = ctx.actions.declare_file("/".join([esm5_root_dir(ctx), path]))
         result.append(rerooted_file)
 
-        # print("copy", f.short_path, "to", rerooted_file.short_path)
         ctx.actions.expand_template(
             output = rerooted_file,
             template = f,
             substitutions = {},
         )
     return depset(result)
+
+def _esm5_sources(ctx):
+    sources = flatten_esm5(ctx)
+
+    return [
+        DefaultInfo(
+            files = sources,
+            runfiles = ctx.runfiles(transitive_files = sources),
+        ),
+        JSEcmaScriptModuleInfo(
+            direct_sources = depset(),
+            sources = sources,
+        )
+    ]
+
+esm5_sources = rule(
+    implementation = _esm5_sources,
+    attrs = {
+        "deps": attr.label_list(
+            aspects = [esm5_outputs_aspect],
+        ),
+    },
+)

packages/bazel/src/external.bzl

@@ -20,6 +20,7 @@ load(
 load(
     "@build_bazel_rules_nodejs//:providers.bzl",
     _NpmPackageInfo = "NpmPackageInfo",
+    _JSEcmaScriptModuleInfo = "JSEcmaScriptModuleInfo",
     _js_ecma_script_module_info = "js_ecma_script_module_info",
     _js_named_module_info = "js_named_module_info",
     _node_modules_aspect = "node_modules_aspect",
@@ -40,5 +41,6 @@ DEFAULT_NG_COMPILER = "@npm//@angular/bazel/bin:ngc-wrapped"
 DEFAULT_NG_XI18N = "@npm//@angular/bazel/bin:xi18n"
 FLAT_DTS_FILE_SUFFIX = ".bundle.d.ts"
 TsConfigInfo = _TsConfigInfo
+JSEcmaScriptModuleInfo = _JSEcmaScriptModuleInfo
 js_ecma_script_module_info = _js_ecma_script_module_info
 js_named_module_info = _js_named_module_info

packages/bazel/src/ng_package/esm5.bzl

@@ -0,0 +1,19 @@
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Example of a rule that requires ES6 inputs.
+"""
+
+load("@build_bazel_rules_nodejs//:providers.bzl", "JSEcmaScriptModuleInfo")
+

tools/defaults.bzl

@@ -5,6 +5,7 @@ load("@npm_bazel_jasmine//:index.bzl", _jasmine_node_test = "jasmine_node_test")
 load("@npm_bazel_karma//:index.bzl", _karma_web_test = "karma_web_test", _karma_web_test_suite = "karma_web_test_suite", _ts_web_test = "ts_web_test", _ts_web_test_suite = "ts_web_test_suite")
 load("@npm_bazel_typescript//:index.bzl", _ts_library = "ts_library")
 load("//packages/bazel:index.bzl", _ng_module = "ng_module", _ng_package = "ng_package")
+load("//packages/bazel/src:esm5.bzl", "esm5_sources")
 load("@npm_bazel_rollup//:index.bzl", _rollup_bundle = "rollup_bundle")
 load("@npm_bazel_terser//:index.bzl", "terser_minified")
 load("@npm//@babel/cli:index.bzl", "babel")
@@ -305,7 +306,7 @@ def jasmine_node_test(deps = [], **kwargs):
         **kwargs
     )
 
-def ng_rollup_bundle(name, deps = [], **kwargs):
+def ng_rollup_bundle(name, entry_point, deps = [], **kwargs):
     """Rollup with Build Optimizer
 
     This provides a variant of the [legacy rollup_bundle] rule that works better for Angular apps.
@@ -335,10 +336,17 @@ def ng_rollup_bundle(name, deps = [], **kwargs):
         "@npm//tslib",
         "@npm//reflect-metadata",
     ]
+    esm5_sources(
+        name = "esm5_sources",
+        deps = deps,
+    )
+    entry_point_label = entry_point
+    esm5_entry_point = Label("@%s//%s:%s" % (entry_point_label.workspace_name, entry_point_label.package, "esm5_sources.esm5/" + entry_point_label.name))
     _rollup_bundle(
         name = name + ".es2015",
         config_file = "//tools:ng_rollup_bundle.config.js",
-        deps = deps,
+        entry_point = esm5_entry_point,
+        deps = ":esm5_sources",
         **kwargs
     )
     terser_minified(name = name + ".min.es2015", src = name + ".es2015", sourcemap = False)