Adding a package's "Package Cache" location as a source seems completely
reasonable.
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From: Heath Stewart [mailto:hea...@outlook.com]
Sent: Tuesday, April 28, 2015 4:01 PM
To: wix-devs@lists.sourceforge.net
Subject: Re: [WiX-devs] Avoiding re-downloading of payloads
For the time being, I thought I'd share that internally I've added - if set -
the layout directory (whether doing a layout or not - seems the BA might want
to do something special here) + package path to the rwzSourcePaths array in the
CacheVerifyLocalContainerOrPayload() function we check before asking the BA.
This works and feels like a good long-term fix unless we do want to consider
the layout directory a sort of cache.
Heath Stewart
Software Engineer
Visual Studio, Microsoft
http://blogs.msdn.com/heaths
________________________________
From: hea...@outlook.com<mailto:hea...@outlook.com>
To: wix-devs@lists.sourceforge.net<mailto:wix-devs@lists.sourceforge.net>
Date: Tue, 28 Apr 2015 15:05:51 -0700
Subject: [WiX-devs] Avoiding re-downloading of payloads
I'm looking into fixing http://wixtoolset.org/issues/3060/ (rather, I'm fixing
it anyway and was wondering if it already was so may as well pick this up) and
have determined a couple different ways but wanted to get architecture guidance
(or feedback in general).
Mainly, is a layout directory considered a local cache? I'm assuming not, since
"cache" also carries some guarantees like that the file is protected (at least
in per-machine cases). I ask, because one way is to check if we're doing a
layout and, if so, track the layout path as the cache. This will avoid adding
cache actions.
Similarly, I could add a member to track a layout specifically and avoid adding
cache actions, but that blurs the line between cache and layout directory.
If we want to disassociate the cache and layout (as they appear to be now), the
most straight forward way is to consider the layout directory (if doing a
layout, or maybe just query the variable anytime since maybe the BA wants that
to be considered regardless of bundle action) in
CacheVerifyLocalContainerOrPayload(). We still plan cache actions, but not
until before downloading it do we consider whether it's already downloaded. I'm
leaning toward this one given that a layout isn't really a cache, but if we
want to consider layout as a type of cache than the ideas above make more sense.
Thoughts?
Heath Stewart
Software Engineer
Visual Studio, Microsoft
http://blogs.msdn.com/heaths
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