From patchwork Fri Sep 25 00:28:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Snow X-Patchwork-Id: 272779 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=-9.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 6BEB6C47423 for ; Fri, 25 Sep 2020 00:54:43 +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 0C1B420759 for ; Fri, 25 Sep 2020 00:54:43 +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="Ed+gGenH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0C1B420759 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]:46064 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLc0Y-0003g7-1B for qemu-devel@archiver.kernel.org; Thu, 24 Sep 2020 20:54:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51304) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLbcO-0001CC-0d for qemu-devel@nongnu.org; Thu, 24 Sep 2020 20:29:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:46522) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLbcG-0000Df-SZ for qemu-devel@nongnu.org; Thu, 24 Sep 2020 20:29:43 -0400 Dkim-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600993775; 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=81Clp/gi1N02OnIoY6vpj7MY+PSX++jNU88i6n8jQqg=; b=Ed+gGenHGFIjOhzezjir+Sc0pHOXOQiIuscI4t+ha6KG4WBslO26OT0u9uyyuOQknL0IzF c0MX7w0tF1i9ccsccJ7ak9RFGah57c1mf5fmjoTU2atrXkavX6OGspbdl9GhZ0G3uj8AxV gLWxbgSOsg1HXEBk4u27jmdp4JUyjtc= 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-596-u_jXjNT0MLC4i2IpaONRxQ-1; Thu, 24 Sep 2020 20:29:32 -0400 X-MC-Unique: u_jXjNT0MLC4i2IpaONRxQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C6B8B188C125 for ; Fri, 25 Sep 2020 00:29:31 +0000 (UTC) Received: from scv.redhat.com (ovpn-119-140.rdu2.redhat.com [10.10.119.140]) by smtp.corp.redhat.com (Postfix) with ESMTP id EE6BE5D9DD; Fri, 25 Sep 2020 00:29:30 +0000 (UTC) From: John Snow To: qemu-devel@nongnu.org Subject: [PATCH v3 35/47] qapi/gen.py: update write() to be more idiomatic Date: Thu, 24 Sep 2020 20:28:48 -0400 Message-Id: <20200925002900.465855-36-jsnow@redhat.com> In-Reply-To: <20200925002900.465855-1-jsnow@redhat.com> References: <20200925002900.465855-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jsnow@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=jsnow@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/24 01:10:00 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.199, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: John Snow , Markus Armbruster , Eduardo Habkost , Cleber Rosa Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Make the file handling here just a tiny bit more idiomatic. (I realize this is heavily subjective.) Use exist_ok=True for os.makedirs and remove the exception, use fdopen() to wrap the file descriptor in a File-like object, and use a context manager for managing the file pointer. Signed-off-by: John Snow Reviewed-by: Eduardo Habkost Reviewed-by: Cleber Rosa --- scripts/qapi/gen.py | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py index ece908a058..201f5af5a5 100644 --- a/scripts/qapi/gen.py +++ b/scripts/qapi/gen.py @@ -14,7 +14,6 @@ # See the COPYING file in the top-level directory. from contextlib import contextmanager -import errno import os import re from typing import ( @@ -67,21 +66,18 @@ def write(self, output_dir: str) -> None: return pathname = os.path.join(output_dir, self.fname) odir = os.path.dirname(pathname) + if odir: - try: - os.makedirs(odir) - except os.error as e: - if e.errno != errno.EEXIST: - raise + os.makedirs(odir, exist_ok=True) + fd = os.open(pathname, os.O_RDWR | os.O_CREAT, 0o666) - f = open(fd, 'r+', encoding='utf-8') - text = self.get_content() - oldtext = f.read(len(text) + 1) - if text != oldtext: - f.seek(0) - f.truncate(0) - f.write(text) - f.close() + with os.fdopen(fd, 'r+', encoding='utf-8') as fp: + text = self.get_content() + oldtext = fp.read(len(text) + 1) + if text != oldtext: + fp.seek(0) + fp.truncate(0) + fp.write(text) def _wrap_ifcond(ifcond: List[str], before: str, after: str) -> str: