charlies
25th January 2005 16:50 UTC

setoverwrite by version
In the past, I have used InstallShield and it had a way to specify file overwrite by (VERSION | DATE) where a file would be overwritten if the new file had a greater version than the old file, independent of the date/time stamp. I assumed, wrongly I believe, that the 'SetOverwrite ifnewer' would take file version (if avaible) into account. Is there a simple way to ensure that a file is overwritten if the source file has a newer version than the destination?

- Charlie

Dkom
25th January 2005 20:46 UTC

> Is there a simple way to ensure that a file is overwritten

You can set "SetOverwrite on" - and it will be always overwritten. If file is blocked (by system, or currently is running) - installer will notify you.

charlies
25th January 2005 22:51 UTC

I realize that, but I only want to override if the file is newer. I would like the definition of 'newer' to be 1) first version 2) then date if necessary. If this does capability not exist, it seems like a nice feature that shouldn't be too dificult to implement. I am hoping, though, that I missed a simple mode/setting to accomplish my goal

kichik
27th January 2005 14:34 UTC

You can use GetDLLVersion and GetDLLVersionLocal to do the version comparsion. You can use the Library or the older UpgradeDLL macro to do this comparison for you.

charlies
27th January 2005 16:35 UTC

Yes, I have used those functions/macros primarily for updating system DLLs. I was just hoping that I missed some capability in the File command that would allow more control over overwriting files. It seems that I did not miss anything and will need to use something other than the File command to update my files.