electron appendSwitch逻辑

调用逻辑

1. lib/browser/api/app.ts,内部依赖的c++模块 commandLine

Object.assign(app, {
  commandLine: {
    hasSwitch: (theSwitch: string) => commandLine.hasSwitch(String(theSwitch)),
    getSwitchValue: (theSwitch: string) => commandLine.getSwitchValue(String(theSwitch)),
    appendSwitch: (theSwitch: string, value?: string) => commandLine.appendSwitch(String(theSwitch), typeof value === 'undefined' ? value : String(value)),
    appendArgument: (arg: string) => commandLine.appendArgument(String(arg))
  } as Electron.CommandLine
});

2.electron的源码： shell/common/api/electron_api_command_line.cc

void AppendSwitch(const std::string& switch_string,
                  gin_helper::Arguments* args) {
  auto* command_line = base::CommandLine::ForCurrentProcess();

  if (base::EndsWith(switch_string, "-path",
                     base::CompareCase::INSENSITIVE_ASCII) ||
      switch_string == network::switches::kLogNetLog) {
    base::FilePath path;
    args->GetNext(&path);
    command_line->AppendSwitchPath(switch_string, path);
    return;
  }

  base::CommandLine::StringType value;
  if (args->GetNext(&value))
    // 如果同时传入 key value ，猜测是调用了这里
    command_line->AppendSwitchNative(switch_string, value);
  else
    command_line->AppendSwitch(switch_string);
}

3. chromium的源码：base/command_line.cc