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"""A test rule that compares two C++ toolchain configuration rules in proto format."""
def _impl(ctx):
first_toolchain_config_proto = ctx.actions.declare_file(
ctx.label.name + "_first_toolchain_config.proto",
)
ctx.actions.write(
first_toolchain_config_proto,
ctx.attr.first[CcToolchainConfigInfo].proto,
)
second_toolchain_config_proto = ctx.actions.declare_file(
ctx.label.name + "_second_toolchain_config.proto",
)
ctx.actions.write(
second_toolchain_config_proto,
ctx.attr.second[CcToolchainConfigInfo].proto,
)
script = ("%s --before='%s' --after='%s'" % (
ctx.executable._comparator.short_path,
first_toolchain_config_proto.short_path,
second_toolchain_config_proto.short_path,
))
test_executable = ctx.actions.declare_file(ctx.label.name)
ctx.actions.write(test_executable, script, is_executable = True)
runfiles = ctx.runfiles(files = [first_toolchain_config_proto, second_toolchain_config_proto])
runfiles = runfiles.merge(ctx.attr._comparator[DefaultInfo].default_runfiles)
return DefaultInfo(runfiles = runfiles, executable = test_executable)
cc_toolchain_config_compare_test = rule(
implementation = _impl,
attrs = {
"first": attr.label(
mandatory = True,
providers = [CcToolchainConfigInfo],
doc = "A C++ toolchain config rule",
),
"second": attr.label(
mandatory = True,
providers = [CcToolchainConfigInfo],
doc = "A C++ toolchain config rule",
),
"_comparator": attr.label(
default = ":ctoolchain_comparator",
executable = True,
cfg = "exec",
),
},
test = True,
)
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