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I am a newcomer to NSIS and I plan to distribute a program A using NSIS. Now I would like to provide an additional component A1 (which cannot be distributed as part of A itself), which must put its files into the directory of A, failing if A is not installed at all. I would also like to be able to install a newer version of A without having to re-install A1.
Is that possible with NSIS? Can you provide an example of such deployment?
For A you would just use
InstallDirRegKeyand point it to your uninstall registry key so a newer version installs on top of the old one.For A1 you should use
InstallDirRegKeyto read A‘s key and then verify this location with the.onVerifyInstdircallback, this will prevent the user from clicking next on the directory page if the correct destination has not been chosen…