How do you make an update installer with NSIS?

Question

I currently have a project with an installer I made with NSIS, but I would like to have an update to new versions that only has the changed files and will show a changelog. The target platform is windows. What methods/suggestions do you have to do this?

Answer 1

You might want to reconsider using NSIS. If you are into patching and distributing updates you will probably get the most benefit from using an installer technology that utilises the Windows Installer capabilities (msiexec).

NSIS is basically a program that runs and does what you want whereas a Windows Installer type installer forces you to split your application into features and components which can be managed by the windows installer msi service. MSI will track things like what versions of products you have installed, whether running the installer again will run in maintenance mode, whether you are allowed to install 2 products of different versions, whether a patch can be applied to a particular version of a product or any other question relating to updates and installs.

Basically most of the stuff you are requesting will be available out-of-the-box if you change to a Windows Installer technology. Whereas if you use NSIS (which doesn't use Windows Installer technology) then you will have to implement it all yourself.

Just as an example there is a pretty comprehensive installer builder called AdvancedInstaller ( http://www.advancedinstaller.com/ ) that sounds like what you want. Alternatively, if you want to spend the rest of your life trawling forums and newsgroups then there is an open source product called WiX that does something similar ;)