ba3ea16f14
If both bp2build_available and label are specified, label will be
preferred.
Initially, we copy the entire BUILD.bazel file. Eventually we may move
this to use bazel query for a more accurate result.
Test: go test *
Test: build/bazel/scripts/milestone-2/demo.sh full
Test: GENERATE_BAZEL_FILES=true m nothing
edit bionic/libc/tools/BUILD.bazel
GENERATE_BAZEL_FILES=true m nothing and verify changes picked up
Bug: 180516554
Change-Id: I43025583300e6b10d2c18032cd4a76237b578d59
116 lines
3.9 KiB
Go
116 lines
3.9 KiB
Go
// Copyright 2021 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package android
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import (
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"fmt"
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"io/ioutil"
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"path/filepath"
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"strings"
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"github.com/google/blueprint/proptools"
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)
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type bazelModuleProperties struct {
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// The label of the Bazel target replacing this Soong module. When run in conversion mode, this
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// will import the handcrafted build target into the autogenerated file. Note: this may result in
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// a conflict due to duplicate targets if bp2build_available is also set.
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Label *string
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// If true, bp2build will generate the converted Bazel target for this module. Note: this may
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// cause a conflict due to the duplicate targets if label is also set.
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Bp2build_available bool
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}
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// Properties contains common module properties for Bazel migration purposes.
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type properties struct {
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// In USE_BAZEL_ANALYSIS=1 mode, this represents the Bazel target replacing
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// this Soong module.
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Bazel_module bazelModuleProperties
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}
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// BazelModuleBase contains the property structs with metadata for modules which can be converted to
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// Bazel.
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type BazelModuleBase struct {
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bazelProperties properties
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}
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// Bazelable is specifies the interface for modules that can be converted to Bazel.
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type Bazelable interface {
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bazelProps() *properties
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HasHandcraftedLabel() bool
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GetBazelLabel() string
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ConvertWithBp2build() bool
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GetBazelBuildFileContents(c Config, path, name string) (string, error)
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}
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// BazelModule is a lightweight wrapper interface around Module for Bazel-convertible modules.
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type BazelModule interface {
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Module
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Bazelable
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}
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// InitBazelModule is a wrapper function that decorates a BazelModule with Bazel-conversion
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// properties.
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func InitBazelModule(module BazelModule) {
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module.AddProperties(module.bazelProps())
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}
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// bazelProps returns the Bazel properties for the given BazelModuleBase.
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func (b *BazelModuleBase) bazelProps() *properties {
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return &b.bazelProperties
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}
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// HasHandcraftedLabel returns whether this module has a handcrafted Bazel label.
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func (b *BazelModuleBase) HasHandcraftedLabel() bool {
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return b.bazelProperties.Bazel_module.Label != nil
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}
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// HandcraftedLabel returns the handcrafted label for this module, or empty string if there is none
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func (b *BazelModuleBase) HandcraftedLabel() string {
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return proptools.String(b.bazelProperties.Bazel_module.Label)
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}
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// GetBazelLabel returns the Bazel label for the given BazelModuleBase.
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func (b *BazelModuleBase) GetBazelLabel() string {
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return proptools.String(b.bazelProperties.Bazel_module.Label)
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}
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// ConvertWithBp2build returns whether the given BazelModuleBase should be converted with bp2build.
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func (b *BazelModuleBase) ConvertWithBp2build() bool {
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return b.bazelProperties.Bazel_module.Bp2build_available
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}
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// GetBazelBuildFileContents returns the file contents of a hand-crafted BUILD file if available or
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// an error if there are errors reading the file.
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// TODO(b/181575318): currently we append the whole BUILD file, let's change that to do
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// something more targeted based on the rule type and target.
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func (b *BazelModuleBase) GetBazelBuildFileContents(c Config, path, name string) (string, error) {
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if !strings.Contains(b.GetBazelLabel(), path) {
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return "", fmt.Errorf("%q not found in bazel_module.label %q", path, b.GetBazelLabel())
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}
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name = filepath.Join(path, name)
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f, err := c.fs.Open(name)
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if err != nil {
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return "", err
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}
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defer f.Close()
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data, err := ioutil.ReadAll(f)
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if err != nil {
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return "", err
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}
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return string(data[:]), nil
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}
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