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Date:	Fri, 2 Jan 2015 22:05:34 -0600
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Subject:	Re: A list of installed packages (no dependencies) -- this may help
From:	Steven Penny <svnpenn AT gmail DOT com>
To:	cygwin AT cygwin DOT com
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On Fri, Jan 2, 2015 at 9:59 PM, Steven Penny wrote:
> A command such as this would need to distinguish between packages manually
> installed and those automatically installed, regardless of where they fall on
> the dependency tree.

To elaborate, this is accomplished on Linux with the file

    /var/lib/apt/extended_states

http://askubuntu.com/a/181544

The analog to this on Cygwin is

    /etc/setup/installed.db

However this currently only tracks

- package name
- package version

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