From patchwork Thu Jul 24 10:38:31 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Milan Zamazal X-Patchwork-Id: 23939 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id DBCF7BDCC1 for ; Thu, 24 Jul 2025 10:39:25 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 9146D690FF; Thu, 24 Jul 2025 12:39:25 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="Jn9xIb35"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 4CADA690DA for ; Thu, 24 Jul 2025 12:39:23 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1753353562; 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=XPgwkwu2xgAZrhVwWV6FdC28FV6mVZ+jemy0jRd8NJI=; b=Jn9xIb35EP/LxbDyqiw4wKKQUeoyuyJqHCFKcBXWd6jZ/axo6JuLqaozR8ut/vc01zcBpN izU+sRsE4JBgDtnj3RW0iXSZl+OQOv5Bl4x3mp2sYP7rCJ/pac2sPzV9YHvQdWVxrj83yQ iHGIui623m4NDpPxcIXYglyTqFQ9WrI= 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-482-bZhAKJ3cOa-CVaGIUTSWjg-1; Thu, 24 Jul 2025 06:39:18 -0400 X-MC-Unique: bZhAKJ3cOa-CVaGIUTSWjg-1 X-Mimecast-MFC-AGG-ID: bZhAKJ3cOa-CVaGIUTSWjg_1753353557 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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 005891800446; Thu, 24 Jul 2025 10:39:17 +0000 (UTC) Received: from mzamazal-thinkpadp1gen7.tpbc.com (unknown [10.44.32.255]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 18E93195608D; Thu, 24 Jul 2025 10:39:14 +0000 (UTC) From: Milan Zamazal To: libcamera-devel@lists.libcamera.org Cc: Milan Zamazal , Kieran Bingham , =?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= , Laurent Pinchart Subject: [PATCH v15 11/12] config: Make configuration file configurable Date: Thu, 24 Jul 2025 12:38:31 +0200 Message-ID: <20250724103834.54611-12-mzamazal@redhat.com> In-Reply-To: <20250724103834.54611-1-mzamazal@redhat.com> References: <20250724103834.54611-1-mzamazal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: UMuNRwrYn461wv0slm0nQ3LCVxi2CZmMcBIV2senGUo_1753353557 X-Mimecast-Originator: redhat.com content-type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" To support easy switching of configurations, let's introduce LIBCAMERA_CONFIG_NAME environment variable, which: - specifies the path of the configuration file to load if it is an absolute path; or - prevents any configuration file from loading if it is defined and empty; or - specifies the path of the configuration file to load, relative to the configuration directories. If such a configuration file doesn't exist, no custom configuration is loaded. Signed-off-by: Milan Zamazal --- Documentation/runtime_configuration.rst | 8 ++++++ src/libcamera/global_configuration.cpp | 36 +++++++++++++++++-------- 2 files changed, 33 insertions(+), 11 deletions(-) diff --git a/Documentation/runtime_configuration.rst b/Documentation/runtime_configuration.rst index 20d20f086..781a2d343 100644 --- a/Documentation/runtime_configuration.rst +++ b/Documentation/runtime_configuration.rst @@ -19,6 +19,14 @@ order: - LIBCAMERA_SYSCONF_DIR/configuration.yaml - LIBCAMERA_DATA_DIR/libcamera/configuration.yaml +The default name of the configuration file, configuration.yaml, can be +overridden in LIBCAMERA_CONFIG_NAME environment variable. The variable +can specify just an alternative configuration file name to be looked up +in the locations above, or it can contain a whole relative or absolute +path. If an absolute path is specified then it is the only location that +is used; if the given file doesn't exist then no configuration file is +read. If the variable is defined but empty, no configuration is loaded. + The first configuration file found wins, configuration files in other locations are ignored. diff --git a/src/libcamera/global_configuration.cpp b/src/libcamera/global_configuration.cpp index b9531fdfb..68a4731a1 100644 --- a/src/libcamera/global_configuration.cpp +++ b/src/libcamera/global_configuration.cpp @@ -23,13 +23,6 @@ namespace libcamera { -namespace { -const std::vector globalConfigurationFiles = { - std::filesystem::path(LIBCAMERA_SYSCONF_DIR) / "configuration.yaml", - std::filesystem::path(LIBCAMERA_DATA_DIR) / "configuration.yaml", -}; -} - LOG_DEFINE_CATEGORY(Configuration) /** @@ -75,6 +68,28 @@ bool GlobalConfiguration::loadFile(const std::filesystem::path &fileName) void GlobalConfiguration::load() { + const std::vector globalConfigurationDirectories = { + std::filesystem::path(LIBCAMERA_SYSCONF_DIR), + std::filesystem::path(LIBCAMERA_DATA_DIR), + }; + + const char *libcameraConfigName = + utils::secure_getenv("LIBCAMERA_CONFIG_NAME"); + if (libcameraConfigName && libcameraConfigName[0] == '\0') + return; + if (!libcameraConfigName) + libcameraConfigName = ""; + + std::filesystem::path configName(libcameraConfigName); + + if (configName.is_absolute()) { + loadFile(configName); + return; + } + + if (configName.empty()) + configName = std::filesystem::path("configuration.yaml"); + std::filesystem::path userConfigurationDirectory; const char *xdgConfigHome = utils::secure_getenv("XDG_CONFIG_HOME"); if (xdgConfigHome) { @@ -88,15 +103,14 @@ void GlobalConfiguration::load() if (!userConfigurationDirectory.empty()) { std::filesystem::path user_configuration_file = - userConfigurationDirectory / "libcamera" / "configuration.yaml"; + userConfigurationDirectory / "libcamera" / configName; if (loadFile(user_configuration_file)) return; } - for (const auto &path : globalConfigurationFiles) { - if (loadFile(path)) + for (const auto &path : globalConfigurationDirectories) + if (loadFile(path / configName)) return; - } } /**