💩 work around default-tools-installer hanging on one download

(internet here is rubbish right now)

local-tasks/default-tools-installer.ts

@@ -0,0 +1,58 @@
+/// <reference path="../node_modules/zarro/types.d.ts" />
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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.
+(function () {
+    const
+      debug = requireModule<DebugFactory>("debug")(__filename),
+      gulp = requireModule<Gulp>("gulp"),
+      env = requireModule<Env>("env"),
+      nugetSourceName = process.env.NUGET_SOURCE || "nuget.org",
+      installLocalTools = requireModule<InstallLocalTools>("install-local-tools"),
+      isDotnetCore = env.resolveFlag("DOTNET_CORE"),
+      tools = isDotnetCore
+        ? [] // currently, only dotnet targets are used for dotnet test/build
+        : [
+          `${ nugetSourceName }/nunit.consolerunner`
+        ];
+
+    env.associate("default-tools-installer", [ "BUILD_TOOLS_FOLDER", "DOTNET_CORE" ]);
+
+    gulp.task(
+      "default-tools-installer",
+      `Installs the default toolset: ${ tools.join(", ") }`,
+      () => {
+        if (env.resolveFlag("DOTNET_CORE")) {
+          debug(`DOTNET_CORE builds currently have ${ tools.length } default tools to install`);
+        }
+        if (tools.length === 0) {
+          // don't waste time calling into the installer
+          // when there are no tools to install
+          return Promise.resolve();
+        }
+        return installLocalTools.install(tools);
+      }
+    );
+
+    gulp.task(
+      "clean-tools-folder",
+      "Cleans out folders under the tools folder (will always be done as part of tool installation)",
+      () => {
+        return installLocalTools.clean();
+      }
+    );
+  })();
+