refactor: use helpers for command-line parsing in renderer/init.js (#16239)

atom/common/api/atom_api_command_line.cc

@@ -0,0 +1,34 @@
+// Copyright (c) 2019 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/common/native_mate_converters/string16_converter.h"
+#include "base/command_line.h"
+#include "native_mate/converter.h"
+#include "native_mate/dictionary.h"
+
+#include "atom/common/node_includes.h"
+
+namespace {
+
+bool HasSwitch(const std::string& name) {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(name.c_str());
+}
+
+base::CommandLine::StringType GetSwitchValue(const std::string& name) {
+  return base::CommandLine::ForCurrentProcess()->GetSwitchValueNative(
+      name.c_str());
+}
+
+void Initialize(v8::Local<v8::Object> exports,
+                v8::Local<v8::Value> unused,
+                v8::Local<v8::Context> context,
+                void* priv) {
+  mate::Dictionary dict(context->GetIsolate(), exports);
+  dict.SetMethod("hasSwitch", &HasSwitch);
+  dict.SetMethod("getSwitchValue", &GetSwitchValue);
+}
+
+}  // namespace
+
+NODE_BUILTIN_MODULE_CONTEXT_AWARE(atom_common_command_line, Initialize)