blob: d5c65aec527c90ebcbec0f679721f7235a0dbdb7 [file] [log] [blame]
# Part of the Crubit project, under the Apache License v2.0 with LLVM
# Exceptions. See /LICENSE for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
"""A rule that generates bindings source files for a given C++ library."""
load(
"//common:crubit_wrapper_macros_oss.bzl",
"crubit_flavor_transition",
)
load(
"//rs_bindings_from_cc/bazel_support:providers.bzl",
"GeneratedBindingsInfo",
)
load(
"//rs_bindings_from_cc/bazel_support:rust_bindings_from_cc_aspect.bzl",
"rust_bindings_from_cc_aspect",
)
def _generate_bindings_impl(ctx):
cc_library = ctx.attr.cc_library[0]
if not GeneratedBindingsInfo in cc_library:
fail("Bindings were not generated for the given cc_library.")
bindings = cc_library[GeneratedBindingsInfo]
return OutputGroupInfo(
cc_file = [bindings.cc_file],
rust_file = [bindings.rust_file],
namespaces_file = [bindings.namespaces_file],
)
_generate_bindings = rule(
attrs = {
"cc_library": attr.label(
providers = [CcInfo],
aspects = [rust_bindings_from_cc_aspect],
cfg = crubit_flavor_transition,
),
},
implementation = _generate_bindings_impl,
)
def golden_test(
name,
cc_library,
tags = None,
basename = None,
golden_cc = None,
golden_rs = None,
golden_namespaces = None):
"""Generates a golden test for `cc_library`.
Args:
name: The name of the golden test.
cc_library: The C++ library whose outputs should be checked.
tags: The test tags.
basename: The name to use for generated files.
golden_cc: The generated C++ source code for the bindings.
golden_rs: The generated Rust source code for the bindings.
golden_namespaces: The generated namespaces JSON file for the bindings.
"""
if not basename:
basename = name
if not tags:
tags = []
tags.append("crubit_golden_test")
bindings_name = basename + ".generated_bindings"
_generate_bindings(
name = bindings_name,
cc_library = cc_library,
)
args = []
data = ["//common:LICENSE_HEADER"]
owned_files = []
if golden_cc:
new_cc = basename + ".cc_file"
native.filegroup(
name = new_cc,
srcs = [bindings_name],
output_group = "cc_file",
)
args += [
"$(location %s)" % golden_cc,
"$(location %s)" % new_cc,
]
data += [
golden_cc,
new_cc,
]
owned_files.append(golden_cc)
if golden_rs:
new_rs = basename + ".rs_file"
native.filegroup(
name = new_rs,
srcs = [bindings_name],
output_group = "rust_file",
)
args += [
"$(location %s)" % golden_rs,
"$(location %s)" % new_rs,
]
data += [
golden_rs,
new_rs,
]
owned_files.append(golden_rs)
if golden_namespaces:
new_namespaces = basename + ".namespaces_file"
native.filegroup(
name = new_namespaces,
srcs = [bindings_name],
output_group = "namespaces_file",
)
args += [
"$(location %s)" % golden_namespaces,
"$(location %s)" % new_namespaces,
]
data += [
golden_namespaces,
new_namespaces,
]
owned_files.append(golden_namespaces)
native.sh_test(
name = name,
srcs = ["//common:golden_test.sh"],
args = args,
data = data,
tags = tags,
)
native.filegroup(
name = basename + ".build_cleaner_optout",
srcs = owned_files,
tags = ["ignore_srcs"],
visibility = ["//visibility:private"],
)