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hermetic_cc_toolchain/rules/platform.bzl

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2.0 KiB
Python

def _platform_transition_impl(settings, attr):
_ignore = settings
return {
"//command_line_option:platforms": "@zig_sdk{}".format(attr.platform),
"//command_line_option:extra_toolchains": ["@zig_sdk{}".format(tc) for tc in attr.extra_toolchains],
}
_platform_transition = transition(
implementation = _platform_transition_impl,
inputs = [],
outputs = [
"//command_line_option:platforms",
"//command_line_option:extra_toolchains",
],
)
def _platform_binary_impl(ctx):
source_info = ctx.attr.src[DefaultInfo]
executable = None
if source_info.files_to_run and source_info.files_to_run.executable:
executable = ctx.actions.declare_file("{}_{}".format(ctx.file.src.basename, ctx.attr.platform))
ctx.actions.run_shell(
command = "cp {} {}".format(source_info.files_to_run.executable.path, executable.path),
inputs = [source_info.files_to_run.executable],
outputs = [executable],
)
return [DefaultInfo(
files = depset(ctx.files.src),
executable = executable,
)]
_attrs = {
"src": attr.label(
allow_single_file = True,
mandatory = True,
doc = "Target to build.",
),
"platform": attr.string(
doc = "The platform to build the target for.",
),
"extra_toolchains": attr.string_list(
doc = "The toolchains to provide as extra_toolchains.",
),
"_allowlist_function_transition": attr.label(
default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
),
}
# wrap a single exectable and build it for the specified platform passing in
# the extra_toolchains.
platform_binary = rule(
implementation = _platform_binary_impl,
cfg = _platform_transition,
attrs = _attrs,
executable = True,
)
# wrap a single test target and build it for the specified platform passing in
# the extra_toolchains.
platform_test = rule(
implementation = _platform_binary_impl,
cfg = _platform_transition,
attrs = _attrs,
test = True,
)