message: Improve error message when PROGRAMFILES is not found
diff: @@ -533,7 +533,15 @@ namespace vcpkg::System
  static const fs::path& get_program_files()
  {
  - static const fs::path PATH = System::get_environment_variable("PROGRAMFILES").value_or_exit(VCPKG_LINE_INFO);
  + static const fs::path PATH = []() -> fs::path {
  + auto value = System::get_environment_variable("PROGRAMFILES");
  + if (auto v = value.get())
  + {
  + return *v;
  + }
  + Checks::exit_with_message(VCPKG_LINE_INFO, "Could not find PROGRAMFILES environment variable");
  + }();
  +
  return PATH;
  }
  @@ -543,7 +551,7 @@ namespace vcpkg::System
  auto value = System::get_environment_variable("ProgramFiles(x86)");
  if (auto v = value.get())
  {
  - return std::move(*v);
  + return *v;
  }
  return get_program_files();
  }();
  @@ -556,7 +564,7 @@ namespace vcpkg::System
  auto value = System::get_environment_variable("ProgramW6432");
  if (auto v = value.get())
  {
  - return std::move(*v);
  + return *v;
  }
  return get_program_files();
  }();
  