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Date: Sat, 30 Sep 2017 12:00:08 +0300
From: Andrey Repin <anrdaemon@yandex.ru>
Reply-To: cygwin@cygwin.com
Message-ID: <216159991.20170930120008@yandex.ru>
To: "Sam Edge (Cygwin)" <cygwin@cygwin.com>, cygwin@cygwin.com
Subject: Re: Dependency issues in setup.ini.
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Greetings, Sam Edge (Cygwin)!

> I've been developing a Python package that can interrogate and
> manipulate local package caches (the directories where setupXXX.exe
> keeps its downloads) and installation databases (from Cygwin
> /etc/setup/installed.db files) with a mind to pruning, merging and
> reporting in the spiript of Michael A. Chase's 'clean_setup' utility but
> as a scriptable tool set rather than a stand-alone utility.

I'm eager to see the fruits of your labor.

> It's not production ready yet but it's already flagged up some issues.

> For example we have lots of dependency loops in the 'requires' fields in
> setup.ini - even to the point that some packages depend upon themselves!

Dependency upon itself is curious, but other than that, this is a normal
situation for a package manager. Some packages are split for easier
maintenance of each, but are interlocked in their typical usage pattern.

> And also we have some dependency omissions. For example, mintty doesn't
> depend upon anything - it has no requires field. Surely, every binary
> package should depend at least upon 'cygwin'?

While this is "not good", this is also not particularly bad for packages in
base - this group is always installed.

> Is this a known issue or should I report in more detail?

Nonetheless, such issues are best kept highlighted, unless it is clearly
seen/documented as intended.


-- 
With best regards,
Andrey Repin
Saturday, September 30, 2017 11:54:56

Sorry for my terrible english...


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