Install & Upgrade from one script
Hello All,
I am new to NSIS and - as is often the case - need to get to understand it adequately by yesterday. With the help of the documentation and by stuyding scripts generated by apps such as HM NIS Edit I have understood nearly everything I currently require. However, there is one thing I still have not been able to figure out
- I would like to generate the one install.exe (or whatever) both for new installations and for upgrades. In the former case I want to allow the user to be able to select the install directory while in the latter case I want the upgrade to go silently into the current install location. I cannot see how this can be done. True, I can manually change InstDir and use the .onVerifyInstDir callback but the former is bound to be confusing and the latter is far from elegant.
And yet, given the clear power of NSIS I am sure this can be done. I would be most grateful for any pointers.