Integrate bazel resource_sets into the build actions

[novas0x2a]

This is an attempt to make parallelization of builds safer by telling bazel what resources an action will consume. By default, Bazel allocates 1 CPU and 250M of RAM, and this makes the current methods of parallelization (i.e. --action_env=CMAKE_BUILD_PARALLEL_LEVEL=16) pretty unpleasant, since bazel won't know and will happily schedule 160 cores worth of actions on a 10-core machine.

This is currently up to get early feedback; some things that are missing are:

• Tests
• Docs
• env priority ordering (i.e. make sure local overrides global)
• meson / autotools
• Also depends on feat: expand the usefulness of resource_sets bazel-lib#1235 merging and being released.

Related to #329

A description of the intended workflow here is:

• target owners add resource_size=tiny|small|medium|large|enormous as they see fit.
  • these sizes map to default cpu/ram allocations (see code) which affect both the resource_set and the underlying build system's parallelization controls (e.g. CMAKE_BUILD_PARALLEL_LEVEL)
• Someone running a build can:
  • override the defaults for what (e.g.) "large" means to either fit within a smaller machine or allow taking advantage of a larger one, by setting new values for @rules_foreign_cc//foreign_cc/settings:size_$size_(cpu|mem)
  • override the global default for targets without resource_size keys with @rules_foreign_cc//foreign_cc/settings:size_default

Currently, changing the values of these settings does invalidate the cache.

[Copilot]

Pull request overview

This PR integrates Bazel resource_sets into build actions to enable safer parallelization. By specifying resource consumption, Bazel can properly schedule builds instead of over-scheduling when build systems use parallel compilation (e.g., CMAKE_BUILD_PARALLEL_LEVEL).

Changes:

• Adds new resource_sets module that defines size classes (tiny/small/medium/large/enormous) with CPU and memory allocations
• Updates framework.bzl and built_tools_framework.bzl to set resource_set and environment variables for parallel builds
• Adds bazel_lib dependency (with temporary archive_override) for resource_set_for function
• Updates dependency versions for platforms, bazel_features, bazel_skylib, rules_cc, rules_shell, and aspect_rules_lint

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
foreign_cc/private/resource_sets.bzl	New module defining size classes, settings creation, and resource set computation logic
foreign_cc/settings/BUILD.bazel	New file that creates build settings for resource size configuration
foreign_cc/private/framework.bzl	Integrates SIZE_ATTRIBUTES and sets resource_set/env vars for cc_external_rule actions
foreign_cc/built_tools/private/built_tools_framework.bzl	Integrates SIZE_ATTRIBUTES and sets resource_set/env vars for built tool actions
toolchains/private/BUILD.bazel	Example usage: sets cmake_tool to "medium" resource size
foreign_cc/repositories.bzl	Adds bazel_lib dependency and updates versions for platforms, bazel_features, bazel_skylib, rules_cc, rules_shell
MODULE.bazel	Updates dependency versions and adds temporary archive_override for bazel_lib pending upstream PR
WORKSPACE.bazel	Updates aspect_rules_lint and switches from aspect_bazel_lib to bazel_lib

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[Copilot]

Pull request overview

Copilot reviewed 11 out of 12 changed files in this pull request and generated 5 comments.

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Pull request overview

Copilot reviewed 17 out of 19 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull request overview

Copilot reviewed 40 out of 43 changed files in this pull request and generated 11 comments.

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[novas0x2a]

replaced by #1465