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46 lines
1.1 KiB
46 lines
1.1 KiB
9 years ago
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#include <windows.h>
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#include <msi.h>
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#include <msiquery.h>
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#include <string>
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#include <vector>
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std::wstring get_property(MSIHANDLE msi_handle, std::wstring const& name)
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{
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DWORD size = 0;
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UINT status = MsiGetPropertyW(msi_handle, name.c_str(), L"", &size);
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if(status == ERROR_MORE_DATA)
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{
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std::vector<wchar_t> buffer(size + 1);
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MsiGetPropertyW(msi_handle, name.c_str(), &buffer[0], &size);
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return std::wstring(&buffer[0]);
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}
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else
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{
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return std::wstring();
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}
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}
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void set_property(MSIHANDLE msi_handle,
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std::wstring const& name, std::wstring const& value)
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{
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MsiSetPropertyW(msi_handle, name.c_str(), value.c_str());
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}
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extern "C" UINT __stdcall DetectNsisOverwrite(MSIHANDLE msi_handle)
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{
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std::wstring install_root = get_property(msi_handle, L"INSTALL_ROOT");
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std::wstring uninstall_exe = install_root + L"\\uninstall.exe";
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bool uninstall_exe_exists =
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GetFileAttributesW(uninstall_exe.c_str()) != INVALID_FILE_ATTRIBUTES;
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set_property(msi_handle, L"CMAKE_NSIS_OVERWRITE_DETECTED",
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uninstall_exe_exists ? L"1" : L"0");
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return ERROR_SUCCESS;
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}
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