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// Copyright 2020 Google Inc. All rights reserved.
//
// 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
//
// http://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.
package bp2build
const (
// The default `load` preamble for every generated queryview BUILD file.
soongModuleLoad = `package(default_visibility = ["//visibility:public"])
load("//build/bazel/queryview_rules:soong_module.bzl", "soong_module")
`
// A macro call in the BUILD file representing a Soong module, with space
// for expanding more attributes.
soongModuleTarget = `soong_module(
name = "%s",
soong_module_name = "%s",
soong_module_type = "%s",
soong_module_variant = "%s",
soong_module_deps = %s,
%s)`
bazelTarget = `%s(
name = "%s",
%s)`
// A simple provider to mark and differentiate Soong module rule shims from
// regular Bazel rules. Every Soong module rule shim returns a
// SoongModuleInfo provider, and can only depend on rules returning
// SoongModuleInfo in the `soong_module_deps` attribute.
providersBzl = `SoongModuleInfo = provider(
fields = {
"name": "Name of module",
"type": "Type of module",
"variant": "Variant of module",
},
)
`
// The soong_module rule implementation in a .bzl file.
soongModuleBzl = `
%s
load("//build/bazel/queryview_rules:providers.bzl", "SoongModuleInfo")
def _generic_soong_module_impl(ctx):
return [
SoongModuleInfo(
name = ctx.attr.soong_module_name,
type = ctx.attr.soong_module_type,
variant = ctx.attr.soong_module_variant,
),
]
generic_soong_module = rule(
implementation = _generic_soong_module_impl,
attrs = {
"soong_module_name": attr.string(mandatory = True),
"soong_module_type": attr.string(mandatory = True),
"soong_module_variant": attr.string(),
"soong_module_deps": attr.label_list(providers = [SoongModuleInfo]),
},
)
soong_module_rule_map = {
%s}
_SUPPORTED_TYPES = ["bool", "int", "string"]
def _is_supported_type(value):
if type(value) in _SUPPORTED_TYPES:
return True
elif type(value) == "list":
supported = True
for v in value:
supported = supported and type(v) in _SUPPORTED_TYPES
return supported
else:
return False
# soong_module is a macro that supports arbitrary kwargs, and uses soong_module_type to
# expand to the right underlying shim.
def soong_module(name, soong_module_type, **kwargs):
soong_module_rule = soong_module_rule_map.get(soong_module_type)
if soong_module_rule == None:
# This module type does not have an existing rule to map to, so use the
# generic_soong_module rule instead.
generic_soong_module(
name = name,
soong_module_type = soong_module_type,
soong_module_name = kwargs.pop("soong_module_name", ""),
soong_module_variant = kwargs.pop("soong_module_variant", ""),
soong_module_deps = kwargs.pop("soong_module_deps", []),
)
else:
supported_kwargs = dict()
for key, value in kwargs.items():
if _is_supported_type(value):
supported_kwargs[key] = value
soong_module_rule(
name = name,
**supported_kwargs,
)
`
// A rule shim for representing a Soong module type and its properties.
moduleRuleShim = `
def _%[1]s_impl(ctx):
return [SoongModuleInfo()]
%[1]s = rule(
implementation = _%[1]s_impl,
attrs = %[2]s
)
`
)
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