.bazelrc - pigweed/quickstart/bazel - Git at Google

 # Copyright 2024 The Pigweed Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may not
 # use this file except in compliance with the License. You may obtain a copy of
 # the License at
 #
 #     https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under
 # the License.

 # Standard Pigweed flags
 # ======================
 # All Pigweed projects are expected to set these flags. They mostly pre-adopt
 # future Bazel settings.
 #
 # The source of truth for these flags is pw_build/pigweed.bazelrc in the main
 # Pigweed repo.
 #
 # Do not attempt to configure an autodetected (local) toolchain. We vendor all
 # our toolchains, and CI VMs may not have any local toolchain to detect.
 common --repo_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1

 # Required for new toolchain resolution API.
 build --incompatible_enable_cc_toolchain_resolution

 # Expose exec toolchains for Python. We use these toolchains in some rule
 # implementations (git grep for
 # "@rules_python//python:exec_tools_toolchain_type").
 build --@rules_python//python/config_settings:exec_tools_toolchain=enabled

 # Don't propagate flags or defines to the exec config. This will become the
 # default one day (https://github.com/bazelbuild/bazel/issues/22457) and will
 # improve cache hit rates between builds targeting different platforms. This is
 # especially impactful for large host tools like protoc, which will have its
 # cache invalidated when your host C++ config changes.
 common --experimental_exclude_defines_from_exec_config
 common --experimental_exclude_starlark_flags_from_exec_config

 # Don't automatically create __init__.py files.
 #
 # This prevents spurious package name collisions at import time, and should be
 # the default (https://github.com/bazelbuild/bazel/issues/7386). It's
 # particularly helpful for Pigweed, because we have many potential package name
 # collisions due to a profusion of stuttering paths like
 # pw_transfer/py/pw_transfer.
 common --incompatible_default_to_explicit_init_py

 # Don't inherit system PATH. Improves hermeticity and cache hit rates. Should
 # be true by default one day (https://github.com/bazelbuild/bazel/issues/7026).
 common --incompatible_strict_action_env

 # C++ toolchain configuration
 # ===========================

 # Ignore all warnings in third-party code.
 common --per_file_copt=external/.*@-w
 common --host_per_file_copt=external/.*@-w

 # Picotool needs to build with exceptions and RTTI enabled.
 common --per_file_copt=external.*picotool.*@-fexceptions,-frtti
 common --host_per_file_copt=external.*picotool.*@-fexceptions,-frtti

 # Keep debugging symbols, but don't send them when flashing.
 build --strip=never

 build --@pico-sdk//bazel/config:PICO_STDIO_USB=True
 build --@pico-sdk//bazel/config:PICO_STDIO_UART=True

 # Sanitizer configs
 # =================
 common:asan --@pigweed//pw_toolchain/host_clang:asan
 common:tsan --@pigweed//pw_toolchain/host_clang:tsan
 common:ubsan --@pigweed//pw_toolchain/host_clang:ubsan

 # Presubmit
 # =========
 # Default targets to build when running:
 # bazel build --config=presubmit
 build:presubmit -- \
   //... \
   //apps/blinky:blinky \
   //apps/blinky:rp2040_blinky.elf \
   //apps/blinky:rp2040_console \
   //apps/blinky:simulator_blinky \
   //apps/blinky:simulator_console \
   //tools:console \

 # UX settings
 # ===========
 # Error output settings.
 common --verbose_failures
 test --test_output=errors

 # Suppress the DEBUG: log messages from bazel. We get spammy DEBUG:
 # messages from rules_python.
 #
 # TODO: https://github.com/bazelbuild/rules_python/issues/1818 - Re-enable DEBUG
 # messages once rules_python stops spamming us.
 common --ui_event_filters=-debug

 # Remote cache
 # ============
 # Use the remote cache. This will only work for users who have permission to
 # access it (including the CI system!).
 common:remote_cache --remote_cache=grpcs://remotebuildexecution.googleapis.com
 common:remote_cache --google_default_credentials=true
 common:remote_cache --remote_instance_name=projects/pigweed-rbe-open/instances/default-instance
 common:remote_cache --remote_upload_local_results=false

 # Platform configuration
 # ======================
 common --custom_malloc=//targets:malloc
 build --@pigweed//pw_build:default_module_config=//system:module_config

 # Host platform default backends.
 common --@pigweed//pw_log:backend=@pigweed//pw_log_string
 common --@pigweed//pw_log:backend_impl=@pigweed//pw_log_string:impl
 common --@pigweed//pw_log_string:handler_backend=@pigweed//pw_system:log_backend
 common --@pigweed//pw_sys_io:backend=@pigweed//pw_sys_io_stdio
 common --@pigweed//pw_system:io_backend=@pigweed//pw_system:socket_target_io

 # RP2040 platform configuration
 build:rp2040 --platforms=//targets/rp2:rp2040
 test:rp2040 --run_under=@pigweed//targets/rp2040/py:unit_test_client

 # RP2350 is the same as rp2040 but with a different --platforms setting.
 build:rp2350 --config=rp2040
 build:rp2350 --platforms=//targets/rp2:rp2350

 # User bazelrc file; see
 # https://bazel.build/configure/best-practices#bazelrc-file
 #
 # Note: this should be at the bottom of the file, so that user-specified
 # options override anything in this file
 # (https://bazel.build/run/bazelrc#imports)
 try-import %workspace%/user.bazelrc
	# Copyright 2024 The Pigweed Authors
	#
	# Licensed under the Apache License, Version 2.0 (the "License"); you may not
	# use this file except in compliance with the License. You may obtain a copy of
	# the License at
	#
	# https://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
	# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
	# License for the specific language governing permissions and limitations under
	# the License.

	# Standard Pigweed flags
	# ======================
	# All Pigweed projects are expected to set these flags. They mostly pre-adopt
	# future Bazel settings.
	#
	# The source of truth for these flags is pw_build/pigweed.bazelrc in the main
	# Pigweed repo.
	#
	# Do not attempt to configure an autodetected (local) toolchain. We vendor all
	# our toolchains, and CI VMs may not have any local toolchain to detect.
	common --repo_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1

	# Required for new toolchain resolution API.
	build --incompatible_enable_cc_toolchain_resolution

	# Expose exec toolchains for Python. We use these toolchains in some rule
	# implementations (git grep for
	# "@rules_python//python:exec_tools_toolchain_type").
	build --@rules_python//python/config_settings:exec_tools_toolchain=enabled

	# Don't propagate flags or defines to the exec config. This will become the
	# default one day (https://github.com/bazelbuild/bazel/issues/22457) and will
	# improve cache hit rates between builds targeting different platforms. This is
	# especially impactful for large host tools like protoc, which will have its
	# cache invalidated when your host C++ config changes.
	common --experimental_exclude_defines_from_exec_config
	common --experimental_exclude_starlark_flags_from_exec_config

	# Don't automatically create __init__.py files.
	#
	# This prevents spurious package name collisions at import time, and should be
	# the default (https://github.com/bazelbuild/bazel/issues/7386). It's
	# particularly helpful for Pigweed, because we have many potential package name
	# collisions due to a profusion of stuttering paths like
	# pw_transfer/py/pw_transfer.
	common --incompatible_default_to_explicit_init_py

	# Don't inherit system PATH. Improves hermeticity and cache hit rates. Should
	# be true by default one day (https://github.com/bazelbuild/bazel/issues/7026).
	common --incompatible_strict_action_env

	# C++ toolchain configuration
	# ===========================

	# Ignore all warnings in third-party code.
	common --per_file_copt=external/.*@-w
	common --host_per_file_copt=external/.*@-w

	# Picotool needs to build with exceptions and RTTI enabled.
	common --per_file_copt=external.picotool.@-fexceptions,-frtti
	common --host_per_file_copt=external.picotool.@-fexceptions,-frtti

	# Keep debugging symbols, but don't send them when flashing.
	build --strip=never

	build --@pico-sdk//bazel/config:PICO_STDIO_USB=True
	build --@pico-sdk//bazel/config:PICO_STDIO_UART=True

	# Sanitizer configs
	# =================
	common:asan --@pigweed//pw_toolchain/host_clang:asan
	common:tsan --@pigweed//pw_toolchain/host_clang:tsan
	common:ubsan --@pigweed//pw_toolchain/host_clang:ubsan

	# Presubmit
	# =========
	# Default targets to build when running:
	# bazel build --config=presubmit
	build:presubmit -- \
	//... \
	//apps/blinky:blinky \
	//apps/blinky:rp2040_blinky.elf \
	//apps/blinky:rp2040_console \
	//apps/blinky:simulator_blinky \
	//apps/blinky:simulator_console \
	//tools:console \

	# UX settings
	# ===========
	# Error output settings.
	common --verbose_failures
	test --test_output=errors

	# Suppress the DEBUG: log messages from bazel. We get spammy DEBUG:
	# messages from rules_python.
	#
	# TODO: https://github.com/bazelbuild/rules_python/issues/1818 - Re-enable DEBUG
	# messages once rules_python stops spamming us.
	common --ui_event_filters=-debug

	# Remote cache
	# ============
	# Use the remote cache. This will only work for users who have permission to
	# access it (including the CI system!).
	common:remote_cache --remote_cache=grpcs://remotebuildexecution.googleapis.com
	common:remote_cache --google_default_credentials=true
	common:remote_cache --remote_instance_name=projects/pigweed-rbe-open/instances/default-instance
	common:remote_cache --remote_upload_local_results=false

	# Platform configuration
	# ======================
	common --custom_malloc=//targets:malloc
	build --@pigweed//pw_build:default_module_config=//system:module_config

	# Host platform default backends.
	common --@pigweed//pw_log:backend=@pigweed//pw_log_string
	common --@pigweed//pw_log:backend_impl=@pigweed//pw_log_string:impl
	common --@pigweed//pw_log_string:handler_backend=@pigweed//pw_system:log_backend
	common --@pigweed//pw_sys_io:backend=@pigweed//pw_sys_io_stdio
	common --@pigweed//pw_system:io_backend=@pigweed//pw_system:socket_target_io

	# RP2040 platform configuration
	build:rp2040 --platforms=//targets/rp2:rp2040
	test:rp2040 --run_under=@pigweed//targets/rp2040/py:unit_test_client

	# RP2350 is the same as rp2040 but with a different --platforms setting.
	build:rp2350 --config=rp2040
	build:rp2350 --platforms=//targets/rp2:rp2350

	# User bazelrc file; see
	# https://bazel.build/configure/best-practices#bazelrc-file
	#
	# Note: this should be at the bottom of the file, so that user-specified
	# options override anything in this file
	# (https://bazel.build/run/bazelrc#imports)
	try-import %workspace%/user.bazelrc