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[209.132.180.67]) by mx.google.com with ESMTP id r197si1936191pfr.192.2018.12.13.07.12.05; Thu, 13 Dec 2018 07:12:32 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728836AbeLMPK5 (ORCPT + 99 others); Thu, 13 Dec 2018 10:10:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:38750 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727618AbeLMPK4 (ORCPT ); Thu, 13 Dec 2018 10:10:56 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 723548831D; Thu, 13 Dec 2018 15:10:55 +0000 (UTC) Received: from laptop.jcline.org (ovpn-122-11.rdu2.redhat.com [10.10.122.11]) by smtp.corp.redhat.com (Postfix) with ESMTPS id DD5F55C221; Thu, 13 Dec 2018 15:10:54 +0000 (UTC) Received: from laptop.jcline.org (localhost [IPv6:::1]) by laptop.jcline.org (Postfix) with ESMTPS id 0B53F468ED5E; Thu, 13 Dec 2018 10:10:54 -0500 (EST) Date: Thu, 13 Dec 2018 10:10:52 -0500 From: Jeremy Cline To: Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= Cc: Thierry Reding , Andrew Morton , Thomas Gleixner , Jonathan Corbet , Joe Perches , linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/2] scripts/spdxcheck.py: Always open files in binary mode Message-ID: <20181213151052.GA13313@laptop.jcline.org> References: <20181212131210.28024-1-thierry.reding@gmail.com> <20181212181410.GC2352@laptop.jcline.org> <20181213073708.nwj4nmnccuugvrhc@pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20181213073708.nwj4nmnccuugvrhc@pengutronix.de> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 13 Dec 2018 15:10:56 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 13, 2018 at 08:37:08AM +0100, Uwe Kleine-König wrote: > On Wed, Dec 12, 2018 at 01:14:10PM -0500, Jeremy Cline wrote: > > Hi, > > > > On Wed, Dec 12, 2018 at 02:12:09PM +0100, Thierry Reding wrote: > > > From: Thierry Reding > > > > > > The spdxcheck script currently falls over when confronted with a binary > > > file (such as Documentation/logo.gif). To avoid that, always open files > > > in binary mode and decode line-by-line, ignoring encoding errors. > > I suggest pointing out that the breakage only happens with python3 and > results in a UnicodeDecodeError. > > > > One tricky case is when piping data into the script and reading it from > > > standard input. By default, standard input will be opened in text mode, > > > so we need to reopen it in binary mode. > > > > > > Signed-off-by: Thierry Reding > > > --- > > > scripts/spdxcheck.py | 6 ++++-- > > > 1 file changed, 4 insertions(+), 2 deletions(-) > > > > > > diff --git a/scripts/spdxcheck.py b/scripts/spdxcheck.py > > > index 5056fb3b897d..e559c6294c39 100755 > > > --- a/scripts/spdxcheck.py > > > +++ b/scripts/spdxcheck.py > > > @@ -168,6 +168,7 @@ class id_parser(object): > > > self.curline = 0 > > > try: > > > for line in fd: > > > + line = line.decode(locale.getpreferredencoding(False), errors='ignore') > > > self.curline += 1 > > > if self.curline > maxlines: > > > break > > > @@ -249,12 +250,13 @@ if __name__ == '__main__': > > > > > > try: > > > if len(args.path) and args.path[0] == '-': > > > - parser.parse_lines(sys.stdin, args.maxlines, '-') > > > + stdin = os.fdopen(sys.stdin.fileno(), 'rb') > > > + parser.parse_lines(stdin, args.maxlines, '-') > > > else: > > > if args.path: > > > for p in args.path: > > > if os.path.isfile(p): > > > - parser.parse_lines(open(p), args.maxlines, p) > > > + parser.parse_lines(open(p, 'rb'), args.maxlines, p) > > > elif os.path.isdir(p): > > > scan_git_subtree(repo.head.reference.commit.tree, p) > > > else: > > > -- > > > 2.19.1 > > > > > > > It might be worth noting this fixes commit 6f4d29df66ac > > ("scripts/spdxcheck.py: make python3 compliant") and also Cc this for > > stable since 6f4d29df66ac got backported to v4.19. While that commit > > did indeed make the script work with Python 3 for piping data, it broke > > Python 2 and made its way to stable. > > It didn't break for me. Can you provide details about how and when it > broke for you? I was wrong about it being Python 2 that broke, sorry about that. 6f4d29df66ac broke Python 3 when you run it against a sub-tree because scan_git_tree() opens the files in binary mode, but then find is run with a text string: $ python3 scripts/spdxcheck.py net/ FAIL: argument should be integer or bytes-like object, not 'str' Traceback (most recent call last): File "scripts/spdxcheck.py", line 259, in scan_git_subtree(repo.head.reference.commit.tree, p) File "scripts/spdxcheck.py", line 211, in scan_git_subtree scan_git_tree(tree) File "scripts/spdxcheck.py", line 206, in scan_git_tree parser.parse_lines(fd, args.maxlines, el.path) File "scripts/spdxcheck.py", line 175, in parse_lines if line.find("SPDX-License-Identifier:") < 0: TypeError: argument should be integer or bytes-like object, not 'str' The reason I opened things in binary mode when I started adding Python 3 support was because not all files were valid UTF-8 (and some were binary) so I decoded the text line-by-line and ignored any decoding errors for simplicity's sake. Regards, Jeremy