Bazel query providers. The Bazel query reference.

Bazel query providers Mar 24, 2025 · $ bazel config 9f87702 9f87702 is a prefix of the complete ID. y) # prints 5 Feb 15, 2019 · 1: In the actual implementation of Bazel, we interleave _loading & analysis phases. Mar 24, 2025 · This page is the reference manual for the Bazel Query Language used when you use bazel query to analyze build dependencies. To execute a query while ignoring errors such as missing targets, use the --keep_going flag. It also describes the output formats bazel query supports. Dec 18, 2023 · The simplest way to retrieve all the providers of a target is to use the providers function, which is a built-in function in Bazel. They are data structures used to pass information between rules, and we'll need them to gather information about dependencies. This is a quick tutorial to get you started using Bazel's query language to trace dependencies in your code. Jun 15, 2022 · looking for a way to get list of all external dependencies along with the version (defined in build file) of the dependencies for the target. Some query options are not allowed here: --keep_going, --query_file, --universe_scope, --order_results and --order_output. The rule you're interested in (bazel_rule here) has to put the information in a provider and the Starlark rule reads the provider from its dependencies. 您可以在命令行中输入 bazel help query 或 bazel help cquery 来获取帮助。 如需执行查询并忽略缺少目标等错误，请使用 --keep_going 标志。 查找规则的依赖项. cquery understands any valid prefix of a complete ID, similar to Git short hashes. This value has a dual purpose: It is a function that can be called to construct 'struct'-like values: DataInfo = provider() d = DataInfo(x = 2, y = 3) print(d. If I know which providers to expect I can test for its presence: if CcInfo in obj: cc_info = obj[CcInfo] but if I don’t knowwhat to expect (or want to list all providers available in the object) I don’t see a way to achieve it without using aspects. scope 在命令行中输入 bazel help query 或 bazel help cquery，即可在 IDE 中获取帮助。 目标. Command flags. For language and --output flag details, see the Bazel query reference and Bazel cquery reference manuals. The dependency must return ALL providers mentioned in at least ONE of the inner lists. This is useful for all kinds of things such as plugins, configuration files, certificates and keys, and resources. cquery comprende cualquier prefijo válido de un ID completo, similar a los hashes cortos de Git. Used on the command line to invoke different Bazel functions, like bazel build, bazel test, bazel run, and bazel query. 3: Skyframe is the evaluation and incrementality model of Bazel cquery is a variant of query that correctly handles select() and build options' effects on the build graph. This article will guide you through a notable subset of Bazelʼs querying features backed by examples. 如需查看 //foo 的依赖项，请在 bazel 查询中使用 deps 函数： Mar 14, 2023 · 通过providers向依赖于当前规则的其它规则传递信息; 常见的命令 build bazel build //path:object. 0 · 7. Mar 24, 2025 · This page covers how to get started using Bazel's query language to trace dependencies in your code. 4. A set of flags specific to a Reference the query manual when analyzing build dependencies with one of Bazel's query languages. 1 · 8. An aspect can read the attributes of the rule its being evaluated on directly through ctx. Providers This section lists providers available on built-in rules. Feb 1, 2020 · Bazel has a neat feature that can simplify a lot of work with tests and executables: the ability to make data files available at run-time using `data` attributes. Esto se debe a que los IDs completos son hashes SHA-256, que son largos y difíciles de seguir. Command. Glossary Look up specialized vocabulary, as well as context-specific uses of common words. Trusted by industry leaders When you build software with Bazel, you're running the same code that has been refined and tested for years at Google to build heavy-duty, mission-critical infrastructure, services, and applications. 查看依赖关系 bazel query --notool_deps --noimplicit_deps "deps(//path:object)" --output graph Clean bazel clean Feb 4, 2025 · 使用 Bazel 构建; 命令和选项; 写入 bazelrc 文件; 从脚本调用 Bazel; 客户端/服务器实现. Thanks to features such as scalability, multilanguage platform support, caching, remote executions, and Bazel queries, developers can use Bazel to reproduce deterministic builds and tests for their projects. For a language details and --output flag details, please see the reference manuals, Bazel query reference and Bazel cquery reference. You can get help by typing bazel help query or bazel help cquery on the command line. _ 2: For a more detailed overview of the action graph, check out Jin’s blog post. $ bazel config 9f87702 9f87702 es un prefijo del ID completo. For a language details and --output flag details, please see the reference manuals, Bazel query reference and Bazel cquery reference . For practical use cases, see the Bazel Query How-To . cquery 是 query 的变体，可正确处理 select() 和 build 选项对 build 图的影响。 Mar 24, 2025 · DataInfo = provider() d = DataInfo(x = 2, y = 3) print(d. attr. This is because complete IDs are SHA-256 hashes, which are long and hard to follow. 如需查看 //foo 的依赖项，请在 bazel 查询中使用 deps 函数： 报告问题 open_in_new 查看源代码 open_in_new 每夜 build · 8. 6 · 7. Mar 24, 2025 · The format of this argument is a list of lists of providers -- *Info objects returned by provider() (or in the case of a legacy provider, its string name). Aug 15, 2018 · We'll define a go_library rule, which can be depended on by other libraries and binaries. query, by constrast, runs over the results of Bazel's loading phase, before options are evaluated. y) # prints 5 Note: Some providers, defined internally, do not allow instance creation It is a key to access a provider instance on a Target Bazel query how-to. is there a way to log dependency:version during the build? Mar 24, 2025 · This tutorial covers how to work with Bazel to trace dependencies in your code using a premade Bazel project. This document also describes the output formats bazel query supports. Nov 13, 2024 · Whether you're a seasoned developer or just dipping your toes into software building, understanding how to use Bazel Query can transform how you manage and optimize your build processes. Get started with the Bazel query language with this new guided scenario. x + d. Jun 20, 2023 · Bazel is a build system that streamlines repetitive tasks to ensure build consistency. See the Rules page for more on providers. It achieves this by running over the results of Bazel's analysis phase, which integrates these effects. The Bazel query reference. 本指南将向您介绍一组基本查询，您可以使用这些查询详细了解项目的文件依赖项。本教程面向对 Bazel 和 BUILD 文件的工作原理有基本了解的新 Bazel 开发者。 前提条件 For files that have default_visibility, use this to find the targets that don't change visibility: bazel query 'attr(visibility, "", //path/to/package:*) Apr 3, 2020 · But it does not allow me to see that I can query it for OutputGroupInfo or CcInfo providers using square brackets syntax. Debug bazel build //path:object -c dbg. If you were looking for a how-to, please see the Bazel Query How-To. rule. The “Target Graph” at the end of Loading phase is only materialized with bazel query and not in actual builds. This document is the reference manual for that language. 5 · 7. Options not specified here will have their default values just like on the command line of bazel query. This function takes a target as an argument and returns a list of all the providers associated with that target. When you use bazel query to analyze build dependencies, you use a little language, the Bazel Query Language. We'll also cover structs, providers, and depsets. For example: Mar 29, 2025 · These correspond to the command line options that can be passed to bazel query. <attr_name> ( the example here does this). bazel query "kind(rule, deps(//foo:target))" --output=package only returns list of dependencies. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Extensions > API reference > Provider Provider A constructor for simple value objects, known as provider instances. bazel cquery About Bazel Getting started User guide Releases Basics Advanced Remote execution Tutorials Migrate Reference Extending Community Versioned docs More GitHub Mar 24, 2025 · Splitting Bazel into a server and client helps amortize JVM startup time and supports faster incremental builds because the action graph remains in memory across commands. xhzyrm ksdwvu utz kzuvh dpei gfxd ywvfits cxngt wxdvr exbsdj enctzl tzum mzvaj ubdib ekt