How can I prompt restart in Inno Setup based off command line argument?

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There are certain cases with my application installer where I'd want to the user to restart their device. Ideally, I'd pass an arg i.e.

Setup.exe /RESTART=yes

And withing the setup script evaluate:

AlwaysRestart={param:RESTART|no}

Unfortunatley, that is not valid:

Error on ... Setup.iss: Value of [Setup] section directive "AlwaysRestart" is invalid.
Compile aborted.

Running InnoSetup 5.6.1

inno-setup windows
1 Answers

I figured out that I am able to pass an argument and use it in the NeedsRestart event function. This will prompt the user to restart the system at the end of a successful installation if I pass /restart=1 as an argument.

[Code]
function NeedRestart(): Boolean;
begin
  Result := ExpandConstant('{param:restart|0}') = '1';
end;
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