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Add blog post for Bazel 4.1.0 (#256)
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| --- | ||
| layout: posts | ||
| title: "Bazel 4.1" | ||
| authors: | ||
| - philwo | ||
| --- | ||
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| Bazel 4.1 is a minor release as part of Bazel’s first LTS release. It is fully backward compatible with Bazel 4.0 and contains selected changes by the Bazel community and Google engineers. | ||
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| ## Apple / Xcode | ||
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| * Added support for Apple Silicon. Bazel can now be built natively for Apple Silicon and runs ~2x faster on that platform than the emulated x86_64 version. ([#11628](https://github.com/bazelbuild/bazel/issues/11628), [#12900](https://github.com/bazelbuild/bazel/issues/12900), [#12653](https://github.com/bazelbuild/bazel/issues/12653)) | ||
| * Added sanitizer support (asan, tsan and ubsan) to Apple platforms. ([#4984](https://github.com/bazelbuild/bazel/issues/4984), [#6932](https://github.com/bazelbuild/bazel/issues/6932), [#12772](https://github.com/bazelbuild/bazel/issues/12772)) | ||
| * Reverted the `-fdebug-compilation-dir` flag to restore compatibility with Xcode 11.3. ([#12905](https://github.com/bazelbuild/bazel/issues/12905)) | ||
| * Improved `cquery` to allow filtering out incompatible targets. This now makes it possible to express queries like "all targets that are compatible with a certain platform". ([#12917](https://github.com/bazelbuild/bazel/issues/12917)) | ||
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| ## C++ | ||
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| * Added support for `.S` files in C++ Starlark's `cc_common.compile`. ([#13155](https://github.com/bazelbuild/bazel/issues/13155)) | ||
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| ## cquery | ||
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| * Removed a non-actionable "Targets were missing from graph" warning printed by `cquery` related to toolchains. ([#11993](https://github.com/bazelbuild/bazel/issues/11993)) | ||
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| ## Coverage | ||
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| * Fixed `bazel coverage` with C++ to work with Remote Execution. ([#13193](https://github.com/bazelbuild/bazel/issues/13193), [#13232](https://github.com/bazelbuild/bazel/issues/13232)) | ||
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| ## External dependencies | ||
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| * Added SHA-1 to subresource integrity format for `download()` checksums. ([#12777](https://github.com/bazelbuild/bazel/issues/12777)) | ||
| * Fixed `--repo_env` to avoid triggering unnecessary fetches. ([#13126](https://github.com/bazelbuild/bazel/issues/13126)) | ||
| * Fixed `--repo_env=VAR` to prevent a crash when not specifying a value. ([#12886](https://github.com/bazelbuild/bazel/issues/12886)) | ||
| * Added `--experimental_repository_disable_download` that prevents Bazel from downloading external repositories. This can ensure fully offline builds by overriding all repositories with `local_repository` / `new_local_repository` rules or populating a `--distdir` cache. | ||
| * Fixed an issue where invalid URL rewriter configs would cause Bazel to silently crash. The error is now correctly reported. ([#12989](https://github.com/bazelbuild/bazel/issues/12989)) | ||
| * Added support for the `all_blocked_message` directive in the URL rewriter config. It can be used to print a user-friendly custom error message specific to a project or organization. ([#12997](https://github.com/bazelbuild/bazel/issues/12997)) | ||
| * Added support for rewriting the protocol of URLs via the URL rewriter. ([#13114](https://github.com/bazelbuild/bazel/issues/13114)) | ||
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| ## Java | ||
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| * Fixed `MANIFEST` section handling in ijar. ([#12730](https://github.com/bazelbuild/bazel/issues/12730)) | ||
| * Updated Turbine to fix a StackOverflowError in error-prone. ([#12926](https://github.com/bazelbuild/bazel/issues/12926)) | ||
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| ## Platforms | ||
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| * Updated the embedded `@platforms` repository to `bazelbuild/platforms` release 0.0.2.. ([#11826](https://github.com/bazelbuild/bazel/issues/11826)) | ||
| * Added the `@platforms//:incompatible` target, which guarantees a target won't build under certain configurations. ([#12690](https://github.com/bazelbuild/bazel/issues/12690)) | ||
| * Improved exec groups so that they can inherit from the rule or other exec groups. ([#13119](https://github.com/bazelbuild/bazel/issues/13119)) | ||
| * Added support and documentation for execution constraints per exec group. ([#13110](https://github.com/bazelbuild/bazel/issues/13110), [#13167](https://github.com/bazelbuild/bazel/issues/13167)) | ||
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| ## Persistent Workers | ||
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| * Multiplex persistent workers can now use the JSON protocol. Please check [the blog post](https://blog.bazel.build/2020/11/11/json-workers.html) for more information. | ||
| * The worker strategy will no longer support the deprecated automatic fallback to non-sandboxed non-worker execution. Instead, the order of strategies to be tried should be configured via the `--strategy=` flag. The old behavior is still supported and enabled by default in Bazel 4.x LTS, but a warning message will now be printed. ([Context](https://github.com/bazelbuild/bazel/commit/3b3e6424c6fbd51d4c4ebb6aa25f1d1f4720221c)) | ||
| * Various protocol-level, crash, bug and performance fixes. | ||
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| ## Remote Execution | ||
| * Updated gRPC to 1.33.1 to fix a corruption issue when downloading CAS blobs. ([#12927](https://github.com/bazelbuild/bazel/issues/12927)) | ||
| * Improved error message for failed uploads by printing the digest of the failed blob. ([#12507](https://github.com/bazelbuild/bazel/issues/12507)) | ||
| * Made error messages for failed executions much more user-friendly by presenting the information embedded in ExecuteResponses in an easily readable format. ([#12564](https://github.com/bazelbuild/bazel/issues/12564)) | ||
| * Fixed the "Must not call uploadBlobs after shutdown" crash when using gRPC Remote Caching and BES. ([#12575](https://github.com/bazelbuild/bazel/issues/12575)) | ||
| * Changed Bazel's behavior to no longer set all files as "executable" when using remote execution. Instead, the executable bit is now correctly passed through from the input file. ([#12818](https://github.com/bazelbuild/bazel/issues/12818)) | ||
| * Improved the logging of WriteRequests to include offset and `finish_write` information. Add logging for QueryWriteStatus calls which occur on progressive writes to determine an offset to begin a write call on a retry. ([#12928](https://github.com/bazelbuild/bazel/issues/12928)) | ||
| * Fixed an issue where builds using remote execution could hang when the server uses gRPC's GOAWAY feature to implement load shedding. ([#12920](https://github.com/bazelbuild/bazel/issues/12920)) | ||
| * Improved performance and interoperability with backends that implement the Remote Execution 2.2 API by setting the platform on the Action message and not just the Command. ([#13134](https://github.com/bazelbuild/bazel/issues/13134)) | ||
| * Fixed an issue where dynamic execution could cause CancellationExceptions. ([#12972](https://github.com/bazelbuild/bazel/issues/12972)) | ||
| * Improved error messages for BulkTransferExceptions to be much more informative and user-friendly by including the actual reason of the failure. ([#13061](https://github.com/bazelbuild/bazel/issues/13061)) | ||
| * Added the `--remote_bytestream_uri_prefix` flag that allows overriding the hostname and instance name in bytestream:// URIs. ([#13085](https://github.com/bazelbuild/bazel/issues/13085)) | ||
| * Improved overall performance and reliability of remote execution by rewriting certain parts with RxJava3. | ||
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| ## User Interface | ||
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| * Changed the flag `--repo_env` so that it can now be specified in the `common` section of a `.bazelrc` file. ([#12689](https://github.com/bazelbuild/bazel/issues/12689)) | ||
| * Added support for multiple `--bazelrc` flags on the command line. ([#12740](https://github.com/bazelbuild/bazel/issues/12740)) | ||
| * Improved shell autocompletion for `bazel run`. ([#11292](https://github.com/bazelbuild/bazel/issues/11292), [#12957](https://github.com/bazelbuild/bazel/issues/12957)) | ||
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| In addition this release contains a couple of other small interoperability, crash, bug and performance fixes. | ||
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| This release contains contributions from many people at Google, as well as Alex Eagle, Cristian Hancila, Daniel Wagner-Hall, Denys Kurylenko, Ed Schouten, Finn Ball, George Gensure, Keith Smiley, Lauri Peltonen, Philipp Schrader, Ryan Beasley, Thi Doan, Ulf Adams, Vaidas Pilkauskas, Yannic Bonenberger, Yuval Kaplan, Yi Cheng. |