bazel | a fast , scalable , multi-language and extensible build system | Build Tool library

 by   bazelbuild Java Version: 7.0.0-pre.20230517.4 License: Apache-2.0

kandi X-RAY | bazel Summary

kandi X-RAY | bazel Summary

bazel is a Java library typically used in Utilities, Build Tool applications. bazel has a Permissive License and it has high support. However bazel has 3137 bugs, it has 19 vulnerabilities and it build file is not available. You can download it from GitHub.
Build and test software of any size, quickly and reliably.

            kandi-support Support

              bazel has a highly active ecosystem.
              It has 20830 star(s) with 3769 fork(s). There are 612 watchers for this library.
              There were 10 major release(s) in the last 6 months.
              There are 1750 open issues and 9536 have been closed. On average issues are closed in 575 days. There are 182 open pull requests and 0 closed requests.
              It has a negative sentiment in the developer community.
              The latest version of bazel is 7.0.0-pre.20230517.4

            kandi-Quality Quality

              bazel has 3137 bugs (105 blocker, 12 critical, 1358 major, 1662 minor) and 34552 code smells.

            kandi-Security Security

              bazel has 2 vulnerability issues reported (0 critical, 1 high, 1 medium, 0 low).
              bazel code analysis shows 17 unresolved vulnerabilities (16 blocker, 1 critical, 0 major, 0 minor).
              There are 311 security hotspots that need review.

            kandi-License License

              bazel is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              bazel releases are available to install and integrate.
              bazel has no build file. You will be need to create the build yourself to build the component from source.
              Installation instructions are available. Examples and code snippets are not available.
              bazel saves you 2068197 person hours of effort in developing the same functionality from scratch.
              It has 847515 lines of code, 63294 functions and 6202 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed bazel and discovered the below as its top functions. This is intended to give you an instant insight into bazel implemented functionality, and help decide if they suit your requirements.
            • Add legacy features .
            • Execute the given command and return the result .
            • Creates a new target .
            • The binary operator .
            • Parse the member specification arguments .
            • Evaluate a single instruction block .
            • Visit an instruction .
            • Visit a program class .
            • Configures the skyframe execution .
            • Search for cycles .
            Get all kandi verified functions for this library.

            bazel Key Features

            Speed up your builds and tests: Bazel rebuilds only what is necessary. With advanced local and distributed caching, optimized dependency analysis and parallel execution, you get fast and incremental builds.
            One tool, multiple languages: Build and test Java, C++, Android, iOS, Go, and a wide variety of other language platforms. Bazel runs on Windows, macOS, and Linux.
            Scalable: Bazel helps you scale your organization, codebase, and continuous integration solution. It handles codebases of any size, in multiple repositories or a huge monorepo.
            Extensible to your needs: Easily add support for new languages and platforms with Bazel's familiar extension language. Share and re-use language rules written by the growing Bazel community.

            bazel Examples and Code Snippets

            Retrieve bazel version .
            pythondot img1Lines of Code : 29dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def retrieve_bazel_version():
              """Retrieve installed bazel version (or bazelisk).
                The bazel version detected.
              bazel_executable = which('bazel')
              if bazel_executable is None:
                bazel_executable = which('bazelisk')
                if ba  
            Get Bazel gcc flags .
            pythondot img2Lines of Code : 13dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def get_bazel_gcc_flags(self):
                ICELAKE_ARCH_OLD = "skylake-avx512"
                ICELAKE_ARCH_NEW = "icelake-server"
                AVX512_FLAGS = ["avx512f", "avx512cd"]
                if IntelPlatform.use_old_arch_names(self, 8, 4):
                  ret_val = self.BAZEL_PREFIX_ + self.A  
            Get Bazel gcc flags .
            pythondot img3Lines of Code : 9dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def get_bazel_gcc_flags(self):
                NEHALEM_ARCH_OLD = "corei7"
                NEHALEM_ARCH_NEW = "nehalem"
                if self.use_old_arch_names(4, 9):
                  return self.BAZEL_PREFIX_ + self.ARCH_PREFIX_ + \
                         NEHALEM_ARCH_OLD + " "
                  return s  

            Community Discussions


            Build from source error: missing input file 'external/net_sf_jchart2d/jar/jchart2d.jar'
            Asked 2022-Mar-05 at 15:32

            I try to build drake1.0.0 from source using bazel. However I encounter the following error:



            Answered 2022-Mar-05 at 15:32

            It turns out that the has been updated and I forget to rerun it. After installing the prerequisite by rerunning, I can build drake from source successfully.



            Build and run a Qt application on macOS via Bazel
            Asked 2022-Feb-16 at 17:13

            I tried to build and run a Qt5 (5.15.2) application on macOS (10.15.7) using Bazel 5.0.0. Unfortunately, I run into some problems. The building part seems to work, but not the run part.

            I installed Qt5 on my machine using Homebrew:



            Answered 2022-Feb-16 at 17:13

            I followed your steps with Mac OSX 10.15.7, Qt (installed by homebrew) 5.15.1 and both bazel 4.2.2-homebrew and 5.0.0-homebrew and initially I could not build the project from git:

            * 3fe5f6c - (4 weeks ago) Add macOS support — Vertexwahn (HEAD -> add-macos-support, origin/add-macos-support)

            This is the result that I get when building:



            How to build header only C++ library within Bazel workspace?
            Asked 2022-Feb-07 at 19:50

            I'm working on a C++ project and I need Numpy like arrays and functionalities in C++. I found some alternatives like xtensor, NumCpp etc. These are header only libraries. The problem is I'm experimenting with Bazel for the first time so, I don't have any idea about how do I add header only library to Bazel workspace. There are some suggestions like genrule-environment, rules-foreign-cc suggested on other questions around Bazel. I've added http_archive to WORKSPACE file, but I'm not sure what to add in BUILD file.

            WORKSPACE file



            Answered 2022-Feb-07 at 19:50

            For simple things like header-only libraries, I would write BUILD files yourself, without using rules_foreign_cc. Just write a cc_library with no srcs. Something like this:



            Bazel: how to import/build a go_binary for a go_test
            Asked 2022-Jan-24 at 20:06

            I'm using bazel to run a go test on my CI system. The go test will need to use a helper binary built from another go file.

            The dir structure looks like the following:



            Answered 2022-Jan-24 at 20:06

            You want data, not deps. deps is for things linked into a binary, data is for things the binary uses at runtime.

            Once your binary is in data, use runfiles.go to run it. Add @io_bazel_rules_go//go/tools/bazel:go_default_library to deps (it's a library you want linked in), and then use FindBinary to find the path.



            Use bazel library inside cmake project
            Asked 2021-Dec-22 at 13:39

            Is there a way that I can use a Bazel-based library like for example lyra inside a CMake-based project? Example: I have a simple hello world program, which is built using CMake - can I somehow use CMake to automatically build the Bazel library and link it somehow in my CMake project so that I can use the lyra library in the main file?



            Answered 2021-Dec-22 at 13:39

            After a lot of research, it turns out that this is kind of possible. I made an easy to follow tutorial on GitHub, which demonstrates the manual steps on how one can cross-compile a Bazel project and then link the result into a Zephyr project (CMake-based).

            Note: depending on the complexity of the existing Bazel project itself and the limited capabilities of the toolchain you are using, you might not be able to integrate the Bazel project into Zephyr without serious code adaptation or refactoring on the Bazel project side!



            Bazel build docker container with local golang module
            Asked 2021-Nov-17 at 08:43

            Let me start by saying I'm new to Bazel. I am trying to build a Docker container from a golang project that contains local module references.

            First I'm creating a local golang module:



            Answered 2021-Nov-17 at 08:43

            Figured it out, posting here if anyone else stumbles on this.

            The answer is simple - you need to embed the go_library rule within the go_image rule. Here is my cmd/hello/BUILD.bazel where I also embed the go image in a docker container



            Using Rules Foreign CC to Build AWS C++ SDK with Bazel
            Asked 2021-Nov-09 at 11:38

            Is there a way to do this? I'm trying to build parts of the AWS SDK (s3 and rds) to use in my Bazel project. I've heard that rules_foreign_cc can be used to integrate CMake projects with Bazel.



            Answered 2021-Nov-09 at 11:38
            load("@rules_foreign_cc//foreign_cc:repositories.bzl", "rules_foreign_cc_dependencies")
            AWS_BUILD = """\
                name = "sdk",
                srcs = glob(["**"]),
                visibility = ["//visibility:public"],
                name = "aws_sdk",
                build_file_content = _ALL_CONTENT,
                commit = "2550901e1011e0ee1dc1bae44b42e1a2c6947c24",
                recursive_init_submodules = True,
                remote = "",
                shallow_since = "1628277923 +0000",



            How to find logs from bazel's previous runs
            Asked 2021-Nov-02 at 20:13

            I'm interested in seeing if bazel ran in the recent past. Where can I find general logging for past bazel build/run/fetch (maybe somewhere in /var/log)?



            Answered 2021-Nov-02 at 20:13

            You can find logs in the output base for the workspace, which for Linux is typically $HOME/.cache/bazel/_bazel_$USER//

            You can find the output base for a workspace by running bazel info output_base in that workspace. Note though that there's a command.log file which contains the output of the last command, and bazel info is itself a command, so that will overwrite command.log. You can do echo -n $(pwd) | md5sum in a bazel workspace to get the md5, or find the README files in the output base directories which say what workspace each is for.



            Golang: fatal error: unexpected signal during runtime execution
            Asked 2021-Oct-29 at 20:27

            I am randomly getting the following error when I am executing the binary (sometime it works):



            Answered 2021-Oct-29 at 20:27

            You should be able to remove the gc_linkopts options from the build. Statically linking glibc is not really supported, and may be causing problems.

            If you have other cgo libraries you need to link statically, you will need to provide the linker flags for those libraries specifically.

            If the only use of cgo is for name resolution on linux, you can almost always build without cgo and rely on the native Go implementations when a static binary is desired without a portable C implementation.



            How to do configuration and variant handling in Bazel?
            Asked 2021-Oct-15 at 23:59

            Been reading the Bazel docs over and over to the point where nothing feels new, but I cannot seem to grasp how to setup configurations and variants for variants other than the native ones, e.g. --cpu and --compilation_mode.

            To explain what I mean with configuration and variants, consider this table of Configuration rows, and Variant Points columns, and Variant cells (making this table up, hope it at least makes abstract sense):

            Has hardware module X Connected on interface Fail fast Customer configuration 1 Yes Ethernet Yes Customer configuration 2 Yes USB Yes Customer configuration 3 No USB No Debug hw configuration No UART Yes

            From a Bazel user perspective:

            • All targets should be buildable for all configurations by default
              • Not ok adding "Customer configuration X" everywhere on adding a configuration
              • Configuration specific components should be possible to explicitly state which configuration it is specific to
                • I think this is what constraint_value is for
            • Rules should add flags based on configuration
              • For example -DVARIANT_POINT_CONNECTED_ETH for Ethernet connection and -DVARIANT_POINT_CONNECTED_USB for USB connection
            • I want a simple build command for building/testing/running a single configuration
              • Something like bazel build //my/target --//:configuration=debughw
              • Think there is something about it in the skylark config docs, but not seeing how to go from the example to using constraint_values and select() in rules


            Answered 2021-Oct-15 at 23:59

            You're looking for platforms. Build settings (that you found first) are better for independent pieces of configuration where setting them in any permutation is useful, vs platforms tie all the pieces together. The resulting settings and constraints can then be used to drive compiler flags and limit targets to certain configurations.

            For your example, I think something like this makes sense:


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


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