upgrade - Can Inno Setup respond differently to a new install and an update?

Question

My InnoSetup script opens a web page (with the user's default browser) at the end of the install process:

[Run]
Filename: http://example.com; Flags: shellexec

However, I'd like the web page to not be opened if the app already exists, i.e., if the user is installing a new version of the program. The web page should only be opened after the initial install. (I assume it's worth mentioning that the install includes an AppID, obviously, and enters values in the registry beside installing files.)

Thank you, as always -- Al C.

Answer 1

Yes, this is easy to do with scripting.

Just write

[Run]
Filename: "http://example.com"; Flags: shellexec; Check: NotAnUpdate

procedure CurPageChanged(CurPageID: Integer);
begin
  if CurPageID = wpInstalling then
    IsUpdate := FileExists(ExpandConstant('{app}TheFileNameOfMyApp.exe'));
end;

function NotAnUpdate: Boolean;
begin
  result := not IsUpdate;
end;