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From:	Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Subject:	Re: setup.ini has multiple "prev" entries ... Why?
To:	The Cygwin Mailing List <cygwin AT cygwin DOT com>
Cc:	Houder <houder AT xs4all DOT nl>
References:	<20e5f0520f9831ecd59e509dc7f7d852 AT xs4all DOT nl> <fa73b1f580569c798dbe8c3867b6a01d AT xs4all DOT nl>
Message-ID:	<d62f76d8-5f85-5de6-caf2-7f4b933f861c@dronecode.org.uk>
Date:	Mon, 6 Nov 2017 14:20:20 +0000
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In-Reply-To:	<fa73b1f580569c798dbe8c3867b6a01d@xs4all.nl>

On 05/11/2017 17:32, Houder wrote:
> On 2017-11-05 13:48, Houder wrote:
>> After I had downloaded and exercised setup version 2.882, I noticed
>> that setup.ini has multiple (2?) "prev" entries per package ...
>>
>> Why? Did I miss one of your announcements mentioning this change?
> 
>      https://cygwin.com/ml/cygwin-apps/2017-10/msg00047.html
> 
>> Because of the way setup works, the last [test] section is the version 
>> which
>> is selected when 'test' is selected, so a specific ordering of the 
>> sections
>>  would be required. ...
>>
[...]
> So ... if I read the above correctly, the "prev" entries can be ordered
> arbitrarily with respect to each other (within a package section) ?????
> (and basically, the same question with respect to the "test" entries)

Since [1], there's no way to install a prev version using setup, without 
explicitly selecting which version you want, so the ordering of those 
[prev] versions in setup.ini is relatively unimportant.

[1] https://cygwin.com/ml/cygwin-apps/2011-07/msg00064.html

However, you can tell setup to install "the test version", so we ensure 
that the highest version [test] section is last, to ensure it's the one 
that setup installs.

> Meaning, one has to "interpret" the version id of each "prev" entry,
> in order to be able to establish the _latest_ "prev" entry (i.e. the
> version of the package before the current one) ?

Yes.

(Although due to historical mistakes with version numbers, that ordering 
might be wrong)

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