Inno Setup ReadReg run-time target program folder, add WAR file to tomcat/webapps

Question

I would like to save a WAR file to xampp\tomcat\webapps by using Inno Setup's ReadReg functionality to find the Install_Dir for XAMPP. This question is similar to Inno Setup: read source path from a registry on compile time but I think the answer I need is flip-flopped. Here's what I have:

Source: "D:\Content.war"; \
  DestDir: "{#ReadReg(HKLM, "SOFTWARE\xampp", "Install_Dir", "DefaultDirName")}\tomcat\webapps"; \
  Flags: ignoreversion

But it doesn't save the WAR file to the target computer's XAMPP folder. Please let me know how this should be properly structured/coded.

Answer 1

Use a scripted constant and RegQueryStringValue function:

[Files]
Source: "D:\Content.war"; DestDir: "{code:GetXamppPath}\tomcat\webapps"

[Code]

function GetXamppPath(Param: string): string;
begin
  RegQueryStringValue(HKLM, 'SOFTWARE\xampp', 'Install_Dir', Result);
end;

Though you should also add some error handling (particularly in case there's no such registry key).

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Btw, the answer that you have based your script on is correct. But it does, what the other question asks for: it reads the key on compile-time = on the machine, where it is built on. That's not what you want.