The main pitfalls are likely to be the default overwrite rules. If you are referring to versioned binaries then Windows won't replace a versioned file with one of a lower version for the (hopefully) obvious reason that a higher version means a later improved version. Data file overwrite rules involve timestamps and hashes.
However, does "freshly installed" mean that your install has just installed a file and now you want to replace it with a different one? If so, you are breaking the rules because Windows knows what files you have installed and if you break that file set then there it's possible that a repair will restore the original version from the MSI file, asking for the install source if necessary. Phil -----Original Message----- From: kpeters58 [mailto:kpet...@otaksoft.com] Sent: Friday, November 09, 2012 3:24 PM To: wix-users@lists.sourceforge.net Subject: [WiX-users] Noob question: Conditional overwrite Hi all, I need to detect if a file with name xxx sits beside the MSI during install and if it does, copy it A) over top of a freshly installed file by the same name in the product directory (in case of a fresh install) B) over top of an already existing file by the same name in the product directory (in case of an update) I believe that I need to use CopyFile and FileSearch to achieve this but am not clear on how to do this; for instance, does sequencing come into play (in the case of A) obviously the file copying must already have happened before I can attempt to overwrite). Any pitfalls around sufficient rights to overwriting files? Thanks for any pointers, K -- View this message in context: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Noob-question- Conditional-overwrite-tp7581849.html Sent from the wix-users mailing list archive at Nabble.com. ---------------------------------------------------------------------------- -- Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
