java/classpath_fragment.go - LeafOS-Project/android_build_soong - Gitiles

 /*
  * Copyright (C) 2021 The Android Open Source Project
  *
  * 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 java

 import (
 	"fmt"
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
 	"strings"

 	"android/soong/android"
 )

 // Build rules and utilities to generate individual packages/modules/common/proto/classpaths.proto
 // config files based on build configuration to embed into /system and /apex on a device.
 //
 // See `derive_classpath` service that reads the configs at runtime and defines *CLASSPATH variables
 // on the device.

 type classpathType int

 const (
 	// Matches definition in packages/modules/common/proto/classpaths.proto
 	BOOTCLASSPATH classpathType = iota
 	DEX2OATBOOTCLASSPATH
 	SYSTEMSERVERCLASSPATH
 	STANDALONE_SYSTEMSERVER_JARS
 )

 func (c classpathType) String() string {
 	return [...]string{"BOOTCLASSPATH", "DEX2OATBOOTCLASSPATH", "SYSTEMSERVERCLASSPATH", "STANDALONE_SYSTEMSERVER_JARS"}[c]
 }

 type classpathFragmentProperties struct {
 	// Whether to generated classpaths.proto config instance for the fragment. If the config is not
 	// generated, then relevant boot jars are added to platform classpath, i.e. platform_bootclasspath
 	// or platform_systemserverclasspath. This is useful for non-updatable APEX boot jars, to keep
 	// them as part of dexopt on device. Defaults to true.
 	Generate_classpaths_proto *bool
 }

 // classpathFragment interface is implemented by a module that contributes jars to a *CLASSPATH
 // variables at runtime.
 type classpathFragment interface {
 	android.Module

 	classpathFragmentBase() *ClasspathFragmentBase
 }

 // ClasspathFragmentBase is meant to be embedded in any module types that implement classpathFragment;
 // such modules are expected to call initClasspathFragment().
 type ClasspathFragmentBase struct {
 	properties classpathFragmentProperties

 	classpathType classpathType

 	outputFilepath android.OutputPath
 	installDirPath android.InstallPath
 }

 func (c *ClasspathFragmentBase) classpathFragmentBase() *ClasspathFragmentBase {
 	return c
 }

 // Initializes ClasspathFragmentBase struct. Must be called by all modules that include ClasspathFragmentBase.
 func initClasspathFragment(c classpathFragment, classpathType classpathType) {
 	base := c.classpathFragmentBase()
 	base.classpathType = classpathType
 	c.AddProperties(&base.properties)
 }

 // Matches definition of Jar in packages/modules/SdkExtensions/proto/classpaths.proto
 type classpathJar struct {
 	path          string
 	classpath     classpathType
 	minSdkVersion string
 	maxSdkVersion string
 }

 // gatherPossibleApexModuleNamesAndStems returns a set of module and stem names from the
 // supplied contents that may be in the apex boot jars.
 //
 // The module names are included because sometimes the stem is set to just change the name of
 // the installed file and it expects the configuration to still use the actual module name.
 //
 // The stem names are included because sometimes the stem is set to change the effective name of the
 // module that is used in the configuration as well,e .g. when a test library is overriding an
 // actual boot jar
 func gatherPossibleApexModuleNamesAndStems(ctx android.ModuleContext, contents []string, tag blueprint.DependencyTag) []string {
 	set := map[string]struct{}{}
 	for _, name := range contents {
 		dep := ctx.GetDirectDepWithTag(name, tag)
 		set[name] = struct{}{}
 		if m, ok := dep.(ModuleWithStem); ok {
 			set[m.Stem()] = struct{}{}
 		} else {
 			ctx.PropertyErrorf("contents", "%v is not a ModuleWithStem", name)
 		}
 	}
 	return android.SortedKeys(set)
 }

 // Converts android.ConfiguredJarList into a list of classpathJars for each given classpathType.
 func configuredJarListToClasspathJars(ctx android.ModuleContext, configuredJars android.ConfiguredJarList, classpaths ...classpathType) []classpathJar {
 	paths := configuredJars.DevicePaths(ctx.Config(), android.Android)
 	jars := make([]classpathJar, 0, len(paths)*len(classpaths))
 	for i := 0; i < len(paths); i++ {
 		for _, classpathType := range classpaths {
 			jar := classpathJar{
 				classpath: classpathType,
 				path:      paths[i],
 			}
 			ctx.VisitDirectDepsIf(func(m android.Module) bool {
 				return m.Name() == configuredJars.Jar(i)
 			}, func(m android.Module) {
 				if s, ok := m.(*SdkLibrary); ok {
 					// TODO(208456999): instead of mapping "current" to latest, min_sdk_version should never be set to "current"
 					if s.minSdkVersion.Specified() {
 						if s.minSdkVersion.IsCurrent() {
 							jar.minSdkVersion = ctx.Config().DefaultAppTargetSdk(ctx).String()
 						} else {
 							jar.minSdkVersion = s.minSdkVersion.String()
 						}
 					}
 					if s.maxSdkVersion.Specified() {
 						if s.maxSdkVersion.IsCurrent() {
 							jar.maxSdkVersion = ctx.Config().DefaultAppTargetSdk(ctx).String()
 						} else {
 							jar.maxSdkVersion = s.maxSdkVersion.String()
 						}
 					}
 				}
 			})
 			jars = append(jars, jar)
 		}
 	}
 	return jars
 }

 func (c *ClasspathFragmentBase) generateClasspathProtoBuildActions(ctx android.ModuleContext, configuredJars android.ConfiguredJarList, jars []classpathJar) {
 	generateProto := proptools.BoolDefault(c.properties.Generate_classpaths_proto, true)
 	if generateProto {
 		outputFilename := strings.ToLower(c.classpathType.String()) + ".pb"
 		c.outputFilepath = android.PathForModuleOut(ctx, outputFilename).OutputPath
 		c.installDirPath = android.PathForModuleInstall(ctx, "etc", "classpaths")

 		generatedTextproto := android.PathForModuleOut(ctx, outputFilename+".textproto")
 		writeClasspathsTextproto(ctx, generatedTextproto, jars)

 		rule := android.NewRuleBuilder(pctx, ctx)
 		rule.Command().
 			BuiltTool("conv_classpaths_proto").
 			Flag("encode").
 			Flag("--format=textproto").
 			FlagWithInput("--input=", generatedTextproto).
 			FlagWithOutput("--output=", c.outputFilepath)

 		rule.Build("classpath_fragment", "Compiling "+c.outputFilepath.String())
 	}

 	classpathProtoInfo := ClasspathFragmentProtoContentInfo{
 		ClasspathFragmentProtoGenerated:  generateProto,
 		ClasspathFragmentProtoContents:   configuredJars,
 		ClasspathFragmentProtoInstallDir: c.installDirPath,
 		ClasspathFragmentProtoOutput:     c.outputFilepath,
 	}
 	ctx.SetProvider(ClasspathFragmentProtoContentInfoProvider, classpathProtoInfo)
 }

 func writeClasspathsTextproto(ctx android.ModuleContext, output android.WritablePath, jars []classpathJar) {
 	var content strings.Builder

 	for _, jar := range jars {
 		fmt.Fprintf(&content, "jars {\n")
 		fmt.Fprintf(&content, "path: \"%s\"\n", jar.path)
 		fmt.Fprintf(&content, "classpath: %s\n", jar.classpath)
 		fmt.Fprintf(&content, "min_sdk_version: \"%s\"\n", jar.minSdkVersion)
 		fmt.Fprintf(&content, "max_sdk_version: \"%s\"\n", jar.maxSdkVersion)
 		fmt.Fprintf(&content, "}\n")
 	}

 	android.WriteFileRule(ctx, output, content.String())
 }

 // Returns AndroidMkEntries objects to install generated classpath.proto.
 // Do not use this to install into APEXes as the injection of the generated files happen separately for APEXes.
 func (c *ClasspathFragmentBase) androidMkEntries() []android.AndroidMkEntries {
 	return []android.AndroidMkEntries{{
 		Class:      "ETC",
 		OutputFile: android.OptionalPathForPath(c.outputFilepath),
 		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
 			func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
 				entries.SetString("LOCAL_MODULE_PATH", c.installDirPath.String())
 				entries.SetString("LOCAL_INSTALLED_MODULE_STEM", c.outputFilepath.Base())
 			},
 		},
 	}}
 }

 var ClasspathFragmentProtoContentInfoProvider = blueprint.NewProvider(ClasspathFragmentProtoContentInfo{})

 type ClasspathFragmentProtoContentInfo struct {
 	// Whether the classpaths.proto config is generated for the fragment.
 	ClasspathFragmentProtoGenerated bool

 	// ClasspathFragmentProtoContents contains a list of jars that are part of this classpath fragment.
 	ClasspathFragmentProtoContents android.ConfiguredJarList

 	// ClasspathFragmentProtoOutput is an output path for the generated classpaths.proto config of this module.
 	//
 	// The file should be copied to a relevant place on device, see ClasspathFragmentProtoInstallDir
 	// for more details.
 	ClasspathFragmentProtoOutput android.OutputPath

 	// ClasspathFragmentProtoInstallDir contains information about on device location for the generated classpaths.proto file.
 	//
 	// The path encodes expected sub-location within partitions, i.e. etc/classpaths/<proto-file>,
 	// for ClasspathFragmentProtoOutput. To get sub-location, instead of the full output / make path
 	// use android.InstallPath#Rel().
 	//
 	// This is only relevant for APEX modules as they perform their own installation; while regular
 	// system files are installed via ClasspathFragmentBase#androidMkEntries().
 	ClasspathFragmentProtoInstallDir android.InstallPath
 }
	/*
	* Copyright (C) 2021 The Android Open Source Project
	*
	* 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 java

	import (
	"fmt"
	"github.com/google/blueprint"
	"github.com/google/blueprint/proptools"
	"strings"

	"android/soong/android"
	)

	// Build rules and utilities to generate individual packages/modules/common/proto/classpaths.proto
	// config files based on build configuration to embed into /system and /apex on a device.
	//
	// See `derive_classpath` service that reads the configs at runtime and defines *CLASSPATH variables
	// on the device.

	type classpathType int

	const (
	// Matches definition in packages/modules/common/proto/classpaths.proto
	BOOTCLASSPATH classpathType = iota
	DEX2OATBOOTCLASSPATH
	SYSTEMSERVERCLASSPATH
	STANDALONE_SYSTEMSERVER_JARS
	)

	func (c classpathType) String() string {
	return [...]string{"BOOTCLASSPATH", "DEX2OATBOOTCLASSPATH", "SYSTEMSERVERCLASSPATH", "STANDALONE_SYSTEMSERVER_JARS"}[c]
	}

	type classpathFragmentProperties struct {
	// Whether to generated classpaths.proto config instance for the fragment. If the config is not
	// generated, then relevant boot jars are added to platform classpath, i.e. platform_bootclasspath
	// or platform_systemserverclasspath. This is useful for non-updatable APEX boot jars, to keep
	// them as part of dexopt on device. Defaults to true.
	Generate_classpaths_proto *bool
	}

	// classpathFragment interface is implemented by a module that contributes jars to a *CLASSPATH
	// variables at runtime.
	type classpathFragment interface {
	android.Module

	classpathFragmentBase() *ClasspathFragmentBase
	}

	// ClasspathFragmentBase is meant to be embedded in any module types that implement classpathFragment;
	// such modules are expected to call initClasspathFragment().
	type ClasspathFragmentBase struct {
	properties classpathFragmentProperties

	classpathType classpathType

	outputFilepath android.OutputPath
	installDirPath android.InstallPath
	}

	func (c ClasspathFragmentBase) classpathFragmentBase() ClasspathFragmentBase {
	return c
	}

	// Initializes ClasspathFragmentBase struct. Must be called by all modules that include ClasspathFragmentBase.
	func initClasspathFragment(c classpathFragment, classpathType classpathType) {
	base := c.classpathFragmentBase()
	base.classpathType = classpathType
	c.AddProperties(&base.properties)
	}

	// Matches definition of Jar in packages/modules/SdkExtensions/proto/classpaths.proto
	type classpathJar struct {
	path string
	classpath classpathType
	minSdkVersion string
	maxSdkVersion string
	}

	// gatherPossibleApexModuleNamesAndStems returns a set of module and stem names from the
	// supplied contents that may be in the apex boot jars.
	//
	// The module names are included because sometimes the stem is set to just change the name of
	// the installed file and it expects the configuration to still use the actual module name.
	//
	// The stem names are included because sometimes the stem is set to change the effective name of the
	// module that is used in the configuration as well,e .g. when a test library is overriding an
	// actual boot jar
	func gatherPossibleApexModuleNamesAndStems(ctx android.ModuleContext, contents []string, tag blueprint.DependencyTag) []string {
	set := map[string]struct{}{}
	for _, name := range contents {
	dep := ctx.GetDirectDepWithTag(name, tag)
	set[name] = struct{}{}
	if m, ok := dep.(ModuleWithStem); ok {
	set[m.Stem()] = struct{}{}
	} else {
	ctx.PropertyErrorf("contents", "%v is not a ModuleWithStem", name)
	}
	}
	return android.SortedKeys(set)
	}

	// Converts android.ConfiguredJarList into a list of classpathJars for each given classpathType.
	func configuredJarListToClasspathJars(ctx android.ModuleContext, configuredJars android.ConfiguredJarList, classpaths ...classpathType) []classpathJar {
	paths := configuredJars.DevicePaths(ctx.Config(), android.Android)
	jars := make([]classpathJar, 0, len(paths)*len(classpaths))
	for i := 0; i < len(paths); i++ {
	for _, classpathType := range classpaths {
	jar := classpathJar{
	classpath: classpathType,
	path: paths[i],
	}
	ctx.VisitDirectDepsIf(func(m android.Module) bool {
	return m.Name() == configuredJars.Jar(i)
	}, func(m android.Module) {
	if s, ok := m.(*SdkLibrary); ok {
	// TODO(208456999): instead of mapping "current" to latest, min_sdk_version should never be set to "current"
	if s.minSdkVersion.Specified() {
	if s.minSdkVersion.IsCurrent() {
	jar.minSdkVersion = ctx.Config().DefaultAppTargetSdk(ctx).String()
	} else {
	jar.minSdkVersion = s.minSdkVersion.String()
	}
	}
	if s.maxSdkVersion.Specified() {
	if s.maxSdkVersion.IsCurrent() {
	jar.maxSdkVersion = ctx.Config().DefaultAppTargetSdk(ctx).String()
	} else {
	jar.maxSdkVersion = s.maxSdkVersion.String()
	}
	}
	}
	})
	jars = append(jars, jar)
	}
	}
	return jars
	}

	func (c *ClasspathFragmentBase) generateClasspathProtoBuildActions(ctx android.ModuleContext, configuredJars android.ConfiguredJarList, jars []classpathJar) {
	generateProto := proptools.BoolDefault(c.properties.Generate_classpaths_proto, true)
	if generateProto {
	outputFilename := strings.ToLower(c.classpathType.String()) + ".pb"
	c.outputFilepath = android.PathForModuleOut(ctx, outputFilename).OutputPath
	c.installDirPath = android.PathForModuleInstall(ctx, "etc", "classpaths")

	generatedTextproto := android.PathForModuleOut(ctx, outputFilename+".textproto")
	writeClasspathsTextproto(ctx, generatedTextproto, jars)

	rule := android.NewRuleBuilder(pctx, ctx)
	rule.Command().
	BuiltTool("conv_classpaths_proto").
	Flag("encode").
	Flag("--format=textproto").
	FlagWithInput("--input=", generatedTextproto).
	FlagWithOutput("--output=", c.outputFilepath)

	rule.Build("classpath_fragment", "Compiling "+c.outputFilepath.String())
	}

	classpathProtoInfo := ClasspathFragmentProtoContentInfo{
	ClasspathFragmentProtoGenerated: generateProto,
	ClasspathFragmentProtoContents: configuredJars,
	ClasspathFragmentProtoInstallDir: c.installDirPath,
	ClasspathFragmentProtoOutput: c.outputFilepath,
	}
	ctx.SetProvider(ClasspathFragmentProtoContentInfoProvider, classpathProtoInfo)
	}

	func writeClasspathsTextproto(ctx android.ModuleContext, output android.WritablePath, jars []classpathJar) {
	var content strings.Builder

	for _, jar := range jars {
	fmt.Fprintf(&content, "jars {\n")
	fmt.Fprintf(&content, "path: \"%s\"\n", jar.path)
	fmt.Fprintf(&content, "classpath: %s\n", jar.classpath)
	fmt.Fprintf(&content, "min_sdk_version: \"%s\"\n", jar.minSdkVersion)
	fmt.Fprintf(&content, "max_sdk_version: \"%s\"\n", jar.maxSdkVersion)
	fmt.Fprintf(&content, "}\n")
	}

	android.WriteFileRule(ctx, output, content.String())
	}

	// Returns AndroidMkEntries objects to install generated classpath.proto.
	// Do not use this to install into APEXes as the injection of the generated files happen separately for APEXes.
	func (c *ClasspathFragmentBase) androidMkEntries() []android.AndroidMkEntries {
	return []android.AndroidMkEntries{{
	Class: "ETC",
	OutputFile: android.OptionalPathForPath(c.outputFilepath),
	ExtraEntries: []android.AndroidMkExtraEntriesFunc{
	func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
	entries.SetString("LOCAL_MODULE_PATH", c.installDirPath.String())
	entries.SetString("LOCAL_INSTALLED_MODULE_STEM", c.outputFilepath.Base())
	},
	},
	}}
	}

	var ClasspathFragmentProtoContentInfoProvider = blueprint.NewProvider(ClasspathFragmentProtoContentInfo{})

	type ClasspathFragmentProtoContentInfo struct {
	// Whether the classpaths.proto config is generated for the fragment.
	ClasspathFragmentProtoGenerated bool

	// ClasspathFragmentProtoContents contains a list of jars that are part of this classpath fragment.
	ClasspathFragmentProtoContents android.ConfiguredJarList

	// ClasspathFragmentProtoOutput is an output path for the generated classpaths.proto config of this module.
	//
	// The file should be copied to a relevant place on device, see ClasspathFragmentProtoInstallDir
	// for more details.
	ClasspathFragmentProtoOutput android.OutputPath

	// ClasspathFragmentProtoInstallDir contains information about on device location for the generated classpaths.proto file.
	//
	// The path encodes expected sub-location within partitions, i.e. etc/classpaths/<proto-file>,
	// for ClasspathFragmentProtoOutput. To get sub-location, instead of the full output / make path
	// use android.InstallPath#Rel().
	//
	// This is only relevant for APEX modules as they perform their own installation; while regular
	// system files are installed via ClasspathFragmentBase#androidMkEntries().
	ClasspathFragmentProtoInstallDir android.InstallPath
	}