X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2741F3861011
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1617091629;
	bh=S59TxpUnx27ugtmMI0S8EXcwRpCPDx3DSZGv0O++ccM=;
	h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe:
	 List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	 From;
	b=qEkAmdERV0uGoeaS9MxGVJzmR/1EdthIQohaUL3bR+3rMNNZ3YP7MrL5LEanybAdA
	 WJZTF2wmr2D4qIpbAo0u4Fg7jHU3ZLLiSxKqrEMXxi96Ykk13ATUoxSzCbCTP9jrx5
	 Wj1RJI+LhF57BUAs1h4oyT6wheoiXJVfzbDYRe28=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org CE6F23851416
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:subject:to:references:from:message-id:date
 :user-agent:mime-version:in-reply-to:content-language
 :content-transfer-encoding;
 bh=SW5rS8bYNmqYfJ0mbN/RMVhS8kdUKk2ZfXVtDt8uMeE=;
 b=ZFkNEpK60iAPJEU/oTAPyMVnoLz0oN9E+5yeaZxCpiJxA7q1ytDhFtMzovv5bSZ06B
 D6fSKZ9VTb3xW/szvWKnaw4ElLtPIgijx629fp0dJDEDKlG+9ekcW6W+vR5zLxM98AIr
 MMCN67c86YpxQ32DZrIeBHYRYsVcrKZQ/kkJLGW0llu+jCaAEYpC4DMWLRuhG6fdLWYF
 5DBNzwnCFAqpviG1IKi8nRy4MVTWwkaMmzOKhDNkNWN7WrE9Ah7SQ499H3+o7xjQkb93
 yMco1dfGYxZBzLipsYZo2mAMRr8Ev/hq7tVjqKsFJWUwBksjBH/avSGH5iLcfxdAomhZ
 LA2g==
X-Gm-Message-State: AOAM532bnoGnjmgPPo/53ILzEaBUwInvzild+HA6GXMDv1txb4uGikwp
 461petW2oURtUMRXeiN2aypyIrOa6hvT1Q==
X-Google-Smtp-Source: ABdhPJxX1WjW7W46beD/Iakh1ZNJ3JZhTi94UMLLt6OqP5XxUzKIMMcM8Cpywy75V/4kG2Cw5U/6Cw==
X-Received: by 2002:a17:907:16a8:: with SMTP id
 hc40mr31672491ejc.40.1617091624932; 
 Tue, 30 Mar 2021 01:07:04 -0700 (PDT)
Subject: Re: How to uninstall packages that were installed as dependency but
 are no longer required
To: cygwin AT cygwin DOT com
References: <20210330 DOT 145159 DOT 2203755649720422295 DOT yasu AT utahime DOT org>
Message-ID: <4c3c2dc4-6de3-9a3b-b39a-986e651275c3@gmail.com>
Date: Tue, 30 Mar 2021 10:07:04 +0200
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101
 Thunderbird/78.9.0
MIME-Version: 1.0
In-Reply-To: <20210330.145159.2203755649720422295.yasu@utahime.org>
Content-Language: it
X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, NICE_REPLY_A,
 RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS,
 TXREP autolearn=ham autolearn_force=no version=3.4.2
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on
 server2.sourceware.org
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
 <mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Marco Atzeri via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Errors-To: cygwin-bounces AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces AT cygwin DOT com>

On 30.03.2021 07:51, Yasuhiro Kimura wrote:
> Hello,
> 
> If you repeat the update of installed Cygwin packages for a while,
> it's quite possible that there are some packages that were installed
> as dependency but are no longer required by any others.
> 
> Then is there any way to detect and uninstall such ones?
> 
> I expect such way as `apt autoremove` of Debian or `dnf autoremove` of
> Fedora.
> 
> Best Regards.
> 
> ---
> Yasuhiro Kimura

as currently we are not tracking between choosen packages
and installed by dependency, Cygwin is lacking such capabilities

the most likely candidates for removal are the different version
of the same libraries

$ cygcheck -cd | grep "^lib" | tee lib.txt

in my case I see

libvpx1                                 1.3.0-2
libvpx3                                 1.5.0-1
libvpx4                                 1.6.1-1
libvpx5                                 1.7.0-1

$ cygcheck-dep -q -n libvpx1 libvpx3 libvpx4 libvpx5
  libvpx1: is needed for ( )
  libvpx3: is needed for ( )
  libvpx4: is needed for ( )
  libvpx5: is needed for ( gstreamer1.0-plugins-good libvpx-devel )

Regards
Marco

--
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple