[wpkg-users] WPKG client upgrade

[Tomasz Chmielewski]

Tomasz Chmielewski schrieb:
> Rainer Meier schrieb:
> 
> (...)
> 
>> It's an ugly work-around trying to kill applications which are currently 
>> running just to unlock these files. Especially since you never know 
>> which other applications (indexing serivice, 3rd party tools...) open 
>> the same file. So replacing a file might fail at any time. I think 
>> that's exactly the reason why an installer can queue such changes in 
>> order to be executed at next reboot.
> 
> Yeah, I too hope there is some way to do it within the MSI.
> 
> Writing another application which just handles updates doesn't seem to 
> be a very good idea for me...

I asked some Microsoft MVPs and it doesn't look too promising:

1) Most (all?) installers do an upgrade by stopping the service first

2) Vista SP1 will include 'hotpatching, a reboot-reduction servicing
technology designed to maximize uptime. It works by allowing Windows
components to be updated (or "patched") while they are still in use by a
running process'. Wow, what a cool name for something obvious in UNIX 
world ;)

3) There is no magic MSI switch or hack to perform an upgrade 
automagically next time the machine is started


Unfortunately, this doesn't give us much choice:

- there is a switch/hack, but we don't know it yet

- for WPKG Client, we need to write another application (service?) which 
just upgrades WPKG Client

- short term: it should be enough to write a script which waits with 
starting msiexec until WPKG logon is gone


Long term: make it integrated better / more automatic / easier etc.



-- 
Tomasz Chmielewski
http://wpkg.org