From patchwork Tue Mar 11 06:53:52 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 14011221 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id F1B50C28B2E for ; Tue, 11 Mar 2025 06:55:56 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1trtVR-0001Uj-Rc; Tue, 11 Mar 2025 02:54:27 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trtVC-0001Tk-BU for qemu-devel@nongnu.org; Tue, 11 Mar 2025 02:54:12 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1trtV9-0001j3-DY for qemu-devel@nongnu.org; Tue, 11 Mar 2025 02:54:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741676040; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=J6ZFLa8G13Faxej6D1UmH0qOm4z1sYNDBxjFg4+whdo=; b=fZHT0+Q2Gxso2czxrvhy9NpLSM8LDE1f+/C9qo4egH62qVgFUB31IDRNbXBU8muOFC3qMO ax4lvCJdpNbCDkNaACN2gV0wJ66+lHTpMB0zGV5Z0ITG7ssiXzb+ZeY4B0ENdao10iGgEX 5OnMLziw2TJlj3hhcgroLUrcFbzrJiU= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-220-Crx5LU2wMeaSIP9BwQk37A-1; Tue, 11 Mar 2025 02:53:58 -0400 X-MC-Unique: Crx5LU2wMeaSIP9BwQk37A-1 X-Mimecast-MFC-AGG-ID: Crx5LU2wMeaSIP9BwQk37A_1741676038 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E8D7C1800262; Tue, 11 Mar 2025 06:53:57 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.22.74.4]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 94C8219560AB; Tue, 11 Mar 2025 06:53:56 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id DE59321E66C1; Tue, 11 Mar 2025 07:53:52 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Cc: michael.roth@amd.com, berrange@redhat.com, jsnow@redhat.com Subject: [PATCH] scripts/qapi/backend: Clean up create_backend()'s failure mode Date: Tue, 11 Mar 2025 07:53:52 +0100 Message-ID: <20250311065352.992307-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org create_backend()'s caller catches QAPIError, and returns non-zero exit code on catch. The caller's caller passes the exit code to sys.exit(). create_backend() doesn't care: it reports errors to stderr and sys.exit()s. Change it to raise QAPIError instead. Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daudé --- scripts/qapi/main.py | 24 +++++++++--------------- 1 file changed, 9 insertions(+), 15 deletions(-) diff --git a/scripts/qapi/main.py b/scripts/qapi/main.py index 5b4679abcf..0e2a6ae3f0 100644 --- a/scripts/qapi/main.py +++ b/scripts/qapi/main.py @@ -31,34 +31,28 @@ def create_backend(path: str) -> QAPIBackend: module_path, dot, class_name = path.rpartition('.') if not dot: - print("argument of -B must be of the form MODULE.CLASS", - file=sys.stderr) - sys.exit(1) + raise QAPIError("argument of -B must be of the form MODULE.CLASS") try: mod = import_module(module_path) except Exception as ex: - print(f"unable to import '{module_path}': {ex}", file=sys.stderr) - sys.exit(1) + raise QAPIError(f"unable to import '{module_path}': {ex}") from ex try: klass = getattr(mod, class_name) - except AttributeError: - print(f"module '{module_path}' has no class '{class_name}'", - file=sys.stderr) - sys.exit(1) + except AttributeError as ex: + raise QAPIError( + f"module '{module_path}' has no class '{class_name}'") from ex try: backend = klass() except Exception as ex: - print(f"backend '{path}' cannot be instantiated: {ex}", - file=sys.stderr) - sys.exit(1) + raise QAPIError( + f"backend '{path}' cannot be instantiated: {ex}") from ex if not isinstance(backend, QAPIBackend): - print(f"backend '{path}' must be an instance of QAPIBackend", - file=sys.stderr) - sys.exit(1) + raise QAPIError( + f"backend '{path}' must be an instance of QAPIBackend") return backend