MSIX: prompt and uninstall MSI PT version (#1248)

src/action_runner/action_runner.cpp

@@ -0,0 +1,52 @@
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+#include <shellapi.h>
+
+#include <string_view>
+
+#include <common/msi_to_msix_upgrade_lib/msi_to_msix_upgrade.h>
+
+#include <winrt/Windows.ApplicationModel.h>
+#include <winrt/Windows.Storage.h>
+
+int uninstall_msi_action()
+{
+    const auto package_path = get_msi_package_path();
+    if (package_path.empty())
+    {
+        return 0;
+    }
+    if (!uninstall_msi_version(package_path))
+    {
+        return -1;
+    }
+
+    // Launch PowerToys again, since it's been terminated by the MSI uninstaller
+    std::wstring runner_path{ winrt::Windows::ApplicationModel::Package::Current().InstalledLocation().Path() };
+    runner_path += L"\\PowerToys.exe";
+    SHELLEXECUTEINFOW sei{ sizeof(sei) };
+    sei.fMask = { SEE_MASK_FLAG_NO_UI | SEE_MASK_NOASYNC };
+    sei.lpFile = runner_path.c_str();
+    sei.nShow = SW_SHOWNORMAL;
+    ShellExecuteExW(&sei);
+
+    return 0;
+}
+
+int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)
+{
+    int nArgs = 0;
+    LPWSTR* args = CommandLineToArgvW(GetCommandLineW(), &nArgs);
+    if (!args || nArgs < 2)
+    {
+        return 1;
+    }
+    std::wstring_view action{ args[1] };
+
+    if (action == L"-uninstall_msi")
+    {
+        return uninstall_msi_action();
+    }
+
+    return 0;
+}