From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=0.2 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED
	autolearn=no autolearn_force=no version=3.4.4
Received: (qmail 20977 invoked from network); 26 Apr 2022 11:43:49 -0000
Received: from 9front.inri.net (168.235.81.73)
  by inbox.vuxu.org with ESMTPUTF8; 26 Apr 2022 11:43:49 -0000
Received: from wopr.sciops.net ([216.126.196.60]) by 9front; Tue Apr 26 07:42:11 -0400 2022
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sciops.net; s=20210706;
	t=1650973325;
	h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
	 to:to:cc:mime-version:mime-version:content-type:content-type:
	 content-transfer-encoding:content-transfer-encoding:  in-reply-to:in-reply-to;
	bh=W+Or8F12/lXeThmzR6rrDnjwza5zCfMh8Nv6C0YM2q8=;
	b=tRgzORRIR6A0CVMarfox+nmCE2VL/N8g7r3ODlLtzivvVpz21hrL26Rt+DilPH6m0ECnSV
	CLISnIIEp495eQeWCBoqL0YR7sBRXIcADH2k6KK1B9T6yQw+QRaLEuuiZWDVAx/nAPBQeL
	mczOr5Inwxlcpl8voVSvUVKHSA0tsuc=
Received: 
	by wopr.sciops.net (OpenSMTPD) with ESMTPSA id 5249ae5b (TLSv1.2:ECDHE-RSA-CHACHA20-POLY1305:256:NO)
	for <9front@9front.org>;
	Tue, 26 Apr 2022 04:42:05 -0700 (PDT)
Message-ID: <86A85EA0F3ED25D8BFEA50C7FD8BD9E9@wopr.sciops.net>
Date: Tue, 26 Apr 2022 13:42:01 +0200
From: qwx@sciops.net
To: 9front@9front.org
In-Reply-To: <202e9c1d-00ab-45cf-8bf3-943651b68e47@sirjofri.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
List-ID: <9front.9front.org>
List-Help: <http://lists.9front.org>
X-Glyph: ➈
X-Bullshit: compliant transactional just-in-time wrapper-scale SVG polling CMS extension proxy solution 
Subject: Re: [9front] Free Carrots #4: Making Backups
Reply-To: 9front@9front.org
Precedence: bulk

On Sat Apr 23 06:23:23 +0200 2022, sl@stanleylieber.com wrote:

> http://helpful.cat-v.org/Blog/2022/04/22/0/
> 
> sl

Hello,

I imagine that by now a whole bunch of people have come up with ways
to back things up or synchronize trees.  I've used mkfs(8) a lot, then
clone(1), etc., but I really wanted to also be able to remove files no
longer present (while not touching any mtimes for up-to-date stuff,
etc.).  After a bunch of iterations of scripts with diff(1) and
others, I now use derp(1) together with the equivalent of dircp(1) and
some awk [1].  This prints two commands, one to remove files, the
other to unpack new or modified ones.  Of course, it's slow and has
tar(1)'s filename length limit, but I kind of like it.  I'm very
interested in hearing about other solutions though :)

Cheers and thanks for the post,
qwx

[1] http://shithub.us/qwx/rc/HEAD/bin/syncab/raw