[8.6.0] Add --experimental_strict_repo_env option#28189
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iancha1992 merged 1 commit intobazelbuild:release-8.6.0from Jan 13, 2026
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[8.6.0] Add --experimental_strict_repo_env option#28189iancha1992 merged 1 commit intobazelbuild:release-8.6.0from
--experimental_strict_repo_env option#28189iancha1992 merged 1 commit intobazelbuild:release-8.6.0from
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A lot changed between v9 and v8. I've yet to properly test the cherry-pick and may have missed some things, using CI to catch the obvious mistakes. |
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--experimental_strict_repo_env option--experimental_strict_repo_env option
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This PR introduces a new flag `--experimental_strict_repo_env` which stops repository rules and module extensions from inheriting the client environment (making `--repo_env=NAME` more than just an advisory notice). When enabled up to 2 environment variables will still be forwarded (unless overridden or explicitly removed via `--repo_env==VARNAME`, see - `PATH` - All platforms - `PATHEXT` - Windows See `test_execute_environment_strict_vars` in `src/test/shell/bazel/starlark_repository_test.sh` for a demonstration. Note that the behavior is different to the similarly named `--incompatible_strict_action_env`, which stops _all_ environment variables (`--action_env` affects actions with `use_default_shell_env = True`) except those specified within the defining rule. This is by design as repository rules operate in an inherently non-hermetic domain, covering roles such as integrating with the C/C++ toolchain installed on the host. It does not make sense to lock down environment variables _by default_, this is best left up to individual projects and users. This flag is marked experimental to allow for testing and requirement discovery (e.g. env vars other than `PATH` that should be included). Closes bazelbuild#10996 Closes bazelbuild#28188.
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### What does this PR do? Bump `.bazelversion` from 8.5.1 to 8.6.0. ### Motivation Selected changes between 8.5.1 and 8.6.0: - Fix visibility for implicit deps of parent rules (bazelbuild/bazel#28722) - Force rctx.{download_and,}extract to create user-readable files (bazelbuild/bazel#28551) - Fix disk cache failures on concurrent read-write access on Windows (bazelbuild/bazel#28529) - Add a target_type argument to ctx.actions.symlink (bazelbuild/bazel#28538) - Compensate for Windows filesystems lacking junction support (bazelbuild/bazel#28367) (our fix) - Add short_uncached and detailed_uncached options to --test_summary (bazelbuild/bazel#28343) - Add --experimental_strict_repo_env option (bazelbuild/bazel#28189) - Make overlaid files executable in http_archive (bazelbuild/bazel#28277) - Add bazel mod show_repo --all_repos and --all_visible_repos (bazelbuild/bazel#28012) - Enable --experimental_retain_test_configuration_across_testonly (bazelbuild/bazel#28115) - Add option to continue with local execution if remote cache is unavailable (bazelbuild/bazel#28001)
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### What does this PR do? Bump `.bazelversion` from 8.5.1 to 8.6.0. ### Motivation Selected changes between 8.5.1 and 8.6.0: - Fix visibility for implicit deps of parent rules (bazelbuild/bazel#28722) - Force rctx.{download_and,}extract to create user-readable files (bazelbuild/bazel#28551) - Fix disk cache failures on concurrent read-write access on Windows (bazelbuild/bazel#28529) - Add a target_type argument to ctx.actions.symlink (bazelbuild/bazel#28538) - Compensate for Windows filesystems lacking junction support (bazelbuild/bazel#28367) (our fix) - Add short_uncached and detailed_uncached options to --test_summary (bazelbuild/bazel#28343) - Add --experimental_strict_repo_env option (bazelbuild/bazel#28189) - Make overlaid files executable in http_archive (bazelbuild/bazel#28277) - Add bazel mod show_repo --all_repos and --all_visible_repos (bazelbuild/bazel#28012) - Enable --experimental_retain_test_configuration_across_testonly (bazelbuild/bazel#28115) - Add option to continue with local execution if remote cache is unavailable (bazelbuild/bazel#28001)
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### What does this PR do? Bump `bazel` version from 8.5.1 to 8.6.0 to benefit from a series of improvements and fixes. Ours (bazelbuild/bazel#28367) allows to re-enable "convenience symlinks" for Windows users and makes [`path.realpath`](https://bazel.build/rules/lib/builtins/path#realpath) succeed when sharing a folder between a Linux host and a Windows VM. ### Motivation Selected changes between 8.5.1 and 8.6.0: - 💡 bazelbuild/bazel#28001 - bazelbuild/bazel#28012 - 💡 bazelbuild/bazel#28189 - bazelbuild/bazel#28277 - bazelbuild/bazel#28343 - 🐕 bazelbuild/bazel#28367 - bazelbuild/bazel#28529 - bazelbuild/bazel#28538 - bazelbuild/bazel#28551 - bazelbuild/bazel#28722 Co-authored-by: regis.desgroppes <[email protected]>
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This PR introduces a new flag
--experimental_strict_repo_envwhich stops repository rules and module extensions from inheriting the client environment (making--repo_env=NAMEmore than just an advisory notice).When enabled up to 2 environment variables will still be forwarded (unless overridden or explicitly removed via
--repo_env==VARNAME, seePATH- All platformsPATHEXT- WindowsSee
test_execute_environment_strict_varsinsrc/test/shell/bazel/starlark_repository_test.shfor a demonstration.Note that the behavior is different to the similarly named
--incompatible_strict_action_env, which stops all environment variables (--action_envaffects actions withuse_default_shell_env = True) except those specified within the defining rule. This is by design as repository rules operate in an inherently non-hermetic domain, covering roles such as integrating with the C/C++ toolchain installed on the host. It does not make sense to lock down environment variables by default, this is best left up to individual projects and users.This flag is marked experimental to allow for testing and requirement discovery (e.g. env vars other than
PATHthat should be included).Closes #10996
Closes #28188.