setoverwrite by version

charlies · 25th January 2005, 15:50

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, 19:46

> 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, 21:51

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, 13:34

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, 15:35

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.

25th January 2005, 15:50	#1
charlies Junior Member Join Date: Jan 2005 Posts: 7	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

27th January 2005, 13:34	#4
kichik M.I.A. [NSIS Dev, Mod] Join Date: Oct 2001 Location: Israel Posts: 11,337	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. NSIS FAQ \| NSIS Home Page \| Donate $ "I hear and I forget. I see and I remember. I do and I understand." -- Confucius

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25th January 2005, 19:46	#2
Dkom Junior Member Join Date: Nov 2004 Location: Russia Kursk-city Posts: 47	> 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.

25th January 2005, 21:51	#3
charlies Junior Member Join Date: Jan 2005 Posts: 7	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

27th January 2005, 15:35	#5
charlies Junior Member Join Date: Jan 2005 Posts: 7	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.