From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44485C33CB2 for ; Fri, 31 Jan 2020 12:28:43 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1089520CC7 for ; Fri, 31 Jan 2020 12:28:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="cAOPVI66" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1089520CC7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52208 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ixVPe-0005Yv-7X for qemu-devel@archiver.kernel.org; Fri, 31 Jan 2020 07:28:42 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:33586) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ixVP1-000580-QW for qemu-devel@nongnu.org; Fri, 31 Jan 2020 07:28:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ixVP0-0007Rc-Kl for qemu-devel@nongnu.org; Fri, 31 Jan 2020 07:28:03 -0500 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:27739 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ixVP0-0007Q7-Ge for qemu-devel@nongnu.org; Fri, 31 Jan 2020 07:28:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580473682; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=o07wf33T7b01eg8hIsXyaCmaR/muSP2k6vcCnC5MFHE=; b=cAOPVI66B72LkrvlCLkI0shRZgn6Ke+gp9SNgnFSe/guSKUHD6ddLs3Z6JLPWo86toydze /1RXcno1INPxJh/81m7qeRNHUxRkUihZlFzpzPfX3DKUQxN3b9FNFN3N1iT9D8higsEoyM oJCVDU0gO52roUHVv7GRogi+ia79mOY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-33-qpHuXxPqOluBlt3hKur_bQ-1; Fri, 31 Jan 2020 07:28:00 -0500 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 52571100550E; Fri, 31 Jan 2020 12:27:59 +0000 (UTC) Received: from [10.3.116.181] (ovpn-116-181.phx2.redhat.com [10.3.116.181]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 51BCB60BE0; Fri, 31 Jan 2020 12:27:51 +0000 (UTC) Subject: Re: Making QEMU easier for management tools and applications To: Kevin Wolf , Markus Armbruster References: <20200123190145.GI657556@redhat.com> <2561a069-ce5f-3c30-b04e-db7cd2fcdc85@redhat.com> <871rrp474i.fsf@dusky.pond.sub.org> <20200124102743.GB824327@redhat.com> <20200124143841.GG4732@dhcp-200-226.str.redhat.com> <87sgk3x2im.fsf@dusky.pond.sub.org> <20200127115606.GA5669@linux.fritz.box> <1c65b678-7bb4-a4cc-5fa6-03d6d27cf381@redhat.com> <20200128102855.GA6431@linux.fritz.box> <87mua7bvwf.fsf@dusky.pond.sub.org> <20200128125409.GF6431@linux.fritz.box> From: Eric Blake Organization: Red Hat, Inc. Message-ID: <4cf1864c-3527-b015-0691-1788a37f4f7e@redhat.com> Date: Fri, 31 Jan 2020 06:27:50 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <20200128125409.GF6431@linux.fritz.box> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-MC-Unique: qpHuXxPqOluBlt3hKur_bQ-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , =?UTF-8?Q?Daniel_P=2e_Berrang=c3=a9?= , "Denis V. Lunev" , Cleber Rosa , Stefan Hajnoczi , qemu-devel , Eduardo Habkost , Paolo Bonzini , =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= , John Snow , Dominik Csapak Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 1/28/20 6:54 AM, Kevin Wolf wrote: >> >> The arguments as dotted keys: >> >> id=bar,backend.type=file,backend.data.out=/tmp/bar.log >> >> Observe there's quite some of nesting. While that's somewhat cumbersome >> in JSON, it's a lot worse with dotted keys, because there nesting means >> repeated key prefixes. I could give much worse examples, actually. > > This is true, but even without the repeated keys (e.g. in a syntax that > would use brackets), it would still be unnecessarily verbose and > probably hard to remember: > > id=bar,backend={type=file,data={out=/tmp/bar.log}} With shells like bash, that would need quoting to avoid unintended brace expansions. It is not the end of the world to require shell quoting (and passing JSON on the command line definitely needs it), but a syntax that avoids shell quoting is marginally easier to type and reason about. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org