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[72.10.148.124]) by smtp.gmail.com with ESMTPSA id o1sm3799644qtw.1.2021.11.21.18.03.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Nov 2021 18:03:25 -0800 (PST) From: Maxim Cournoyer To: Vagrant Cascadian Subject: Re: default tar format for "make dist" and patch file length References: <87sfvxhrav.fsf@ponder> <874k8bxbit.fsf@gnu.org> <87fsru8l05.fsf@ponder> Date: Sun, 21 Nov 2021 21:03:24 -0500 In-Reply-To: <87fsru8l05.fsf@ponder> (Vagrant Cascadian's message of "Wed, 17 Nov 2021 14:39:38 -0800") Message-ID: <87zgpxaqvn.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::729 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::729; envelope-from=maxim.cournoyer@gmail.com; helo=mail-qk1-x729.google.com X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: guix-devel@gnu.org Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1637546649; h=from:from:sender:sender: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:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=6v5TDX2+sBn9flmj18WhBadJvQMYI2l3TNWN7jPPCXQ=; b=ra/NBZJxxHCcnk6AfyUu8u+m1kQ2MEz3+L08d+0D7sD4gaECd1KAGJrjUojY6PP9AU52Uk XARD6tiCOrN0ZH3ja1p7DtBumhgn05FQi5LIyiPDCvQs9CTpfxMu7HKSdfAJlbb7DAS1oC iGC7d1c4lUZSvF3PHRmejfR+fktSD/0g/O1KGhmXC2VpxyHZclLdMKUJwAfwxaAzpwCY01 EbHVpzLjOGP+6Z5SzSqjcLfpTxCDtQlxEBThZwHAGfN6FBo+qrkPERzfopchK+tzMeTJCN VGbe2O8SpKBR5HrFUPjMv/xq9fRv2nFZpuy0HszguCcCIAfAIdj2u3BDRWJ4Og== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1637546649; a=rsa-sha256; cv=none; b=PMqbzsAe/IXLqZi4Cl6C21SqtrUgZxphj3Y/vmy3xjtPAMffrpW5ma6WdN5upp79r17GbD kZgSXNRs6DArcHiyfqWPOVZtPuQPmRuPIytJBvAYZb1gptZPUEsCZWMcO6TXIgcSNrkFqE 0VfryOcNgwlcqDBRzd/DpUSB0vmoEdzuFFm6F6qV4J0bnnuERB1PG9/ReFGK66OHkqxeh3 c4xcG/r5nSypQ/r4ABRu5CSsJPTWOHuqdfLCT6LqD/yXLp9LoC8DBCTRSVPy7riGn/O9kw 0afEnw4nhklKOWLRkzkTMGMEeO6sNZ/6ANphdtle9x5FR7qE09V1NmQkBXyo+A== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="I/R7E/En"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Spam-Score: -1.78 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="I/R7E/En"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 846A7131C4 X-Spam-Score: -1.78 X-Migadu-Scanner: scn1.migadu.com X-TUID: cd+DfLs7M0ys Hello, [...] >>> A different angle might be to actually use a different tar format: >>> >>> https://www.gnu.org/software/tar/manual/html_section/Formats.html >>> >>> I would guess "make dist" is using the tar "v7" format, based on the 99 >>> character length limit for files. Most of the other formats have no file >>> length limit or a longer limit. >> >> Yes, we could also do that. > > Struggling to figure out how to do that; seems automake is very inclined > to use the old format... anyone with sufficient auto* skills to try and > upgrade the "make dist" to pass one of the newer --format=3D arguments to > tar? Reading the Automake manual (info (automake) List of Automake options) I stumbled on this: =E2=80=98filename-length-max=3D99=E2=80=99 Abort if file names longer than 99 characters are found during =E2=80=98make dist=E2=80=99. Such long file names are generally c= onsidered not to be portable in tarballs. See the =E2=80=98tar-v7=E2=80=99 and =E2= =80=98tar-ustar=E2=80=99 options below. This option should be used in the top-level =E2=80=98Makef= ile.am=E2=80=99 or as an argument of =E2=80=98AM_INIT_AUTOMAKE=E2=80=99 in =E2=80= =98configure.ac=E2=80=99; it will be ignored otherwise. It will also be ignored in sub-packages of nested packages (*note Subpackages::). This makes me think that Automake is simply configured out of the box to keep the file names as portable as possible (it doesn't mean it uses tar-v7 itself, IIUC, though I haven't checked). Seems a good thing to be as portable as can be, especially since 200 chars patch file names wouldn't look good in the sources anyway ;-). Thanks, Maxim