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@@ -0,0 +1,108 @@
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+// Copyright (C) 2022 The Android Open Source Project
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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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+
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+package filesystem
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+
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+import (
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+ "fmt"
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+
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+ "github.com/google/blueprint/proptools"
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+
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+ "android/soong/android"
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+)
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+
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+type avbGenVbmetaImage struct {
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+ android.ModuleBase
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+
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+ properties avbGenVbmetaImageProperties
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+
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+ output android.OutputPath
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+ installDir android.InstallPath
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+}
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+
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+type avbGenVbmetaImageProperties struct {
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+ // Source file of this image. Can reference a genrule type module with the ":module" syntax.
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+ Src *string `android:"path,arch_variant"`
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+
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+ // Name of the image partition. Defaults to the name of this module.
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+ Partition_name *string
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+
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+ // The salt in hex. Required for reproducible builds.
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+ Salt *string
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+}
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+
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+// The avbGenVbmetaImage generates an unsigned VBMeta image output for the given image.
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+func avbGenVbmetaImageFactory() android.Module {
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+ module := &avbGenVbmetaImage{}
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+ module.AddProperties(&module.properties)
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+ android.InitAndroidArchModule(module, android.DeviceSupported, android.MultilibFirst)
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+ return module
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+}
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+
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+func (a *avbGenVbmetaImage) installFileName() string {
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+ return a.Name() + ".img"
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+}
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+
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+func (a *avbGenVbmetaImage) GenerateAndroidBuildActions(ctx android.ModuleContext) {
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+ builder := android.NewRuleBuilder(pctx, ctx)
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+ cmd := builder.Command().BuiltTool("avbtool").Text("add_hash_footer")
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+ cmd.Flag("--dynamic_partition_size")
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+ cmd.Flag("--do_not_append_vbmeta_image")
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+
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+ partition_name := proptools.StringDefault(a.properties.Partition_name, a.Name())
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+ cmd.FlagWithArg("--partition_name ", partition_name)
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+
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+ if a.properties.Src == nil {
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+ ctx.PropertyErrorf("src", "missing source file")
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+ return
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+ }
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+ input := android.PathForModuleSrc(ctx, proptools.String(a.properties.Src))
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+ cmd.FlagWithInput("--image ", input)
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+
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+ if a.properties.Salt == nil {
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+ ctx.PropertyErrorf("salt", "missing salt value")
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+ return
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+ }
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+ cmd.FlagWithArg("--salt ", proptools.String(a.properties.Salt))
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+
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+ a.output = android.PathForModuleOut(ctx, a.installFileName()).OutputPath
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+ cmd.FlagWithOutput("--output_vbmeta_image ", a.output)
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+ builder.Build("avbGenVbmetaImage", fmt.Sprintf("avbGenVbmetaImage %s", ctx.ModuleName()))
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+}
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+
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+var _ android.AndroidMkEntriesProvider = (*avbGenVbmetaImage)(nil)
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+
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+// Implements android.AndroidMkEntriesProvider
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+func (a *avbGenVbmetaImage) AndroidMkEntries() []android.AndroidMkEntries {
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+ return []android.AndroidMkEntries{android.AndroidMkEntries{
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+ Class: "ETC",
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+ OutputFile: android.OptionalPathForPath(a.output),
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+ ExtraEntries: []android.AndroidMkExtraEntriesFunc{
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+ func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
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+ entries.SetString("LOCAL_MODULE_PATH", a.installDir.String())
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+ entries.SetString("LOCAL_INSTALLED_MODULE_STEM", a.installFileName())
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+ },
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+ },
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+ }}
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+}
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+
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+var _ android.OutputFileProducer = (*avbGenVbmetaImage)(nil)
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+
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+// Implements android.OutputFileProducer
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+func (a *avbGenVbmetaImage) OutputFiles(tag string) (android.Paths, error) {
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+ if tag == "" {
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+ return []android.Path{a.output}, nil
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+ }
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+ return nil, fmt.Errorf("unsupported module reference tag %q", tag)
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+}
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