Hi Rob,

Do you have any advice on my question per se, then? Should the developers just 
use a separate source for each of these very similar applications?  
Troubleshooters will often want to see them all at once, and not have to go 
back and forth between different names and things. But I do see the point of 
having clean stuff and not use Permanent willy-nilly.

On the other hand, our stuff is also for internal use only and the applications 
and environment targeted is very controlled and standardized with very 
technically unsophisticated users and plenty of space, etc. on their machines. 
In fact, I've never heard of an out-and-out "uninstall" in the environment we 
use now (which doesn't use Windows Installer at all for these applications). We 
do want to be able to do it, hence one of the reasons to use WiX to help us to 
do better - and it certainly has proved much more congenial than Setup 
projects. Since all the application packages of this type create the source 
anyway, I guess we'd only have a problem with a non-permanent if we somehow did 
not immediately replace it with something.

Thanks for the thoughts,



Keith Douglas
Statistics Canada | 170 Tunney's Pasture Driveway, Ottawa ON K1A 0T6
Statistique Canada | 170, promenade Tunney's Pasture, Ottawa ON K1A 0T6
keith.doug...@statcan.gc.ca
Telephone | Téléphone 613-951-4405
Facsimile | Télécopieur 613-951-1966
Government of Canada | Gouvernement du Canada 


-----Original Message-----
From: Rob Mensching [mailto:r...@robmensching.com] 
Sent: March-22-13 11:49 AM
To: Christopher Painter; General discussion for Windows Installer XML toolset.
Subject: Re: [WiX-users] Event source sharing

Please don't mark things permanent that are part of your application. Have your 
application clean up correctly. The only time you should think about leaving 
stuff is for user generated data (including user settings).


On Fri, Mar 22, 2013 at 8:14 AM, Christopher Painter <chr...@iswix.com>wrote:

>
> If you look at the built MSI, you'll see EventSource is just some
> syntactic sugar to express simple registry keys/values.    Create a
> component in a fragment / wix library and mark it as shared.  Then do 
> a ComponentRef in your various installers and they will all "share" that
> component.   Last one off will remove it.
>
> Or you could just mark it as permanent and not worry about it so much.  
> I probably would because any event log entries are likely to stick 
> around long after your applications have been uninstalled.
>
> ----------------------------------------
>  From: keith.doug...@statcan.gc.ca
> Sent: Friday, March 22, 2013 10:09 AM
> To: wix-users@lists.sourceforge.net
> Subject: [WiX-users] Event source sharing
>
> Hi everyone,
>
> I'm getting the hang of Util:EventSource, and I realized our original 
> plan was to have several of our applications (which are all "of a 
> kind" - they are a bunch of collection instruments which are from the 
> perspective of installation more or less identical) share a source. If 
> one MSI installs the EventSource originally, and another application 
> attempts to install it ...
>
> (a) What happens on install? I seem to see that this collision is harmless.
> (b) What happens on uninstall of *one* of the applications? Is there 
> reference counting so that this does nothing to the source until the 
> last application is removed? Do they have to share components or 
> anything like that for this to work, or is the naming sufficient?
>
> Keith Douglas
> Statistics Canada | 170 Tunney's Pasture Driveway, Ottawa ON K1A 0T6 
> Statistique Canada | 170, promenade Tunney's Pasture, Ottawa ON K1A 
> 0T6 keith.doug...@statcan.gc.ca Telephone | Téléphone 613-951-4405 
> Facsimile | Télécopieur 613-951-1966 Government of Canada | 
> Gouvernement du Canada
>
>
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