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* Add host Bazel build Updates target_compatible_with across the repo to ensure that wildcard builds for both host and rp2040 succeed. * Get unit tests building * Add Python script to identify build system differences Uses the build system tags to make it easier to identify differences between the CMake and Bazel builds. * Temporarily disable pico divider test * Support PICO_BARE_METAL in Bazel * Support PICO_NO_GC_SECTIONS in Bazel * Support boot2 configuration in Bazel Adds support for PICO_DEFAULT_BOOT_STAGE2 and PICO_DEFAULT_BOOT_STAGE2_FILE in the Bazel build. * Allowlist some CMake-only options * Support CXX configuration options in Bazel * Move multiple_choice_flag.bzl * Support all pico boards * Support linking multiple stdio implementations Changes the Bazel build so stdio implementations are no longer mutually exclusive. * Add PICO_BOOT_STAGE2_LINK_IMAGE * Support PICO_CMSIS_PATH in Bazel * Support PICO_USE_DEFAULT_MAX_PAGE_SIZE in Bazel * Silence PICO_CMSIS_VENDOR and PICO_CMSIS_DEVICE differences * Support PICO_STDIO_USB_CONNECT_WAIT_TIMEOUT_MS in Bazel * Properly support version defines * Support embedding binary info in Bazel * Embed build type in binary * Support different linker scripts in Bazel build * Finish out missing PICO_BUILD_DEFINE in Bazel build * Support PICO_NO_TARGET_NAME * Reorganize initial configuration options in Bazel Cleans up and reorganizes some of the initial configuration options added to the Bazel build so everything is consistent. * Add builds for pioasm and elf2uf2 * Use Python rules from rules_python * Actually link in output formats in pioasm tool * Make tools have public visibility * Add UF2 Bazel aspect * Add TODOs for pioasm/uf2 helpers * Fix compile flag typo * Update Bazel SDK configuration strings to match recent CMake changes * Fix pico_divider test * Clean up straggling TODOs * Clarify pico_stdio_test compatibility * Initial Bazel Pico W support * Add new files from develop * Clean up compatibility expressions in Bazel build * Clean up rp2 constraint handling in Bazel * More Bazel docs cleanup * Format Bazel build files * Consolidate transitions in the Pico SDK * Make every _allowlist_function_transition explicit * More docs cleanup * Add a few missing defines * Improve PICO_CONFIG_HEADER correctness in Bazel * Minor docs clarifications
64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
# TODO: Default to a list of known compatible rules until the toolchain emits
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# firmware images with a .elf extension. When binaries have a .elf suffix,
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# this can change to ["*"] and another attribute that allows extension-based
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# filtering can be added to more easily support a wider array of file types.
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_SUPPORTED_BINARY_TYPES = ",".join([
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"cc_binary",
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"cc_test",
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])
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def _pico_uf2_aspect_impl(target, ctx):
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allowed_types = ctx.attr.from_rules.split(",")
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if ctx.rule.kind not in allowed_types and "*" not in allowed_types:
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return []
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binary_to_convert = target[DefaultInfo].files_to_run.executable
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uf2_output = ctx.actions.declare_file(binary_to_convert.basename + ".uf2")
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ctx.actions.run(
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outputs = [uf2_output],
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inputs = [binary_to_convert],
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tools = [ctx.executable._elf2uf2_tool],
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executable = ctx.executable._elf2uf2_tool,
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arguments = [
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binary_to_convert.path,
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uf2_output.path,
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],
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)
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return [
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OutputGroupInfo(
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pico_uf2_files = depset([uf2_output]),
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),
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]
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return []
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pico_uf2_aspect = aspect(
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implementation = _pico_uf2_aspect_impl,
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doc = """An aspect for generating UF2 images from ELF binaries.
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Normally with Bazel, a cc_binary or other rule cannot be "extended" to emit
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additional outputs. However, this aspect may be used as a secondary, adjacent
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step that generates UF2 images from all ELF artifacts.
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This can be used from a build to produce UF2 files alongside the regular
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outputs:
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```
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bazel build --platforms=@pico-sdk//bazel/platform:rp2040 \\
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--aspects @pico-sdk//tools:uf2_aspect.bzl%pico_uf2_aspect \\
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--output_groups=+pico_uf2_files \\
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//...
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```
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It's also possible to use this aspect within a custom macro (e.g. my_cc_binary)
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to produce UF2 images alongside ELF files. However, with that method UF2 images
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will only be produced when you explicitly use your custom macro.
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""",
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attrs = {
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"from_rules": attr.string(
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default = _SUPPORTED_BINARY_TYPES,
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doc = "A comma-separated list of rule kinds to apply the UF2 aspect to",
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),
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"_elf2uf2_tool": attr.label(default = "//tools/elf2uf2:elf2uf2", executable = True, cfg = "exec"),
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},
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)
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