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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.
- soongModuleTargetTemplate = `soong_module(
- name = "%s",
- soong_module_name = "%s",
- soong_module_type = "%s",
- soong_module_variant = "%s",
- soong_module_deps = %s,
- %s)`
- ruleTargetTemplate = `%s(
- name = "%s",
- %s)`
- unnamedRuleTargetTemplate = `%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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