if err != nil {
		return err
	}
	defer f.Close()
	_, _, err = c.Put(cache.Subkey(a.actionID, name), f)
	return err
}

func (b *Builder) findCachedObjdirFile(a *Action, c cache.Cache, name string) (string, error) {
	file, _, err := cache.GetFile(c, cache.Subkey(a.actionID, name))
	if err != nil {
		return "", fmt.Errorf("loading cached file %s: %w", name, err)
	}
	return file, nil

	if a.Mode == "link" {
		// For linking, use the main package's build ID instead of
		// the binary's build ID, so it is the same hash used in
		// compiling and linking.
		// When compiling, we use actionID/actionID (instead of
		// actionID/contentID) as a temporary build ID to compute
		// the hash. Do the same here. (See buildid.go:useCache)
		// The build ID matters because it affects the overall hash

	if r1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func WinVerifyTrustEx(hwnd HWND, actionId *GUID, data *WinTrustData) (ret error) {
	r0, _, _ := syscall.Syscall(procWinVerifyTrustEx.Addr(), 3, uintptr(hwnd), uintptr(unsafe.Pointer(actionId)), uintptr(unsafe.Pointer(data)))
	if r0 != 0 {
		ret = syscall.Errno(r0)
	}
	return
}

//sys	WinVerifyTrustEx(hwnd HWND, actionId *GUID, data *WinTrustData) (ret error) = wintrust.WinVerifyTrustEx
//sys	RegOpenKeyEx(key Handle, subkey *uint16, options uint32, desiredAccess uint32, result *Handle) (regerrno error) = advapi32.RegOpenKeyExW