how do I verify the install folder?

[jonwil2]

I have a NSIS installer which is using Modern UI.
I am using MUI_PAGE_DIRECTORY to do an installation directory dialog.
I wish to make it so that either the "next" button is greyed out unless the install folder contains <file> or when you press the next button, the installer wont move on unless the install folder contains <file>.
How can I do that?

[Comperio]

Just use MUI_PAGE_CUSTOMFUNCTION_LEAVE to specify a leave function. In your leave function, you can then check for the presence of your file. Something like this:

code:


Function dirLeave

   IfFileExists '$MyFile' leavedir

   MessageBox MB_OK "File '$MyFile' does exist in this location."

   abort

   leavedir:

   ; OK to leave

FunctionEnd