Android分级多项目依赖解决方案

Question

在我的Android项目中，我有一个将构建依赖项复制到外部目录的任务，如下所示：

task copyBuildDependencies(type: Copy) {
    delete "$buildDir/dependencies"
    afterEvaluate {
        from configurations.releaseCompileClasspath
        into "$buildDir/dependencies"

        doLast {
            FileTree files = fileTree("$buildDir/dependencies")
            files.forEach { file ->
                if (file.isFile() && file.name.endsWith(".aar")) {
                    copy {
                        from zipTree(file).matching { include "*.jar" }
                        into "$buildDir/dependencies"
                        eachFile {
                            it.path = it.path.replace(it.name, "${file.name}-${it.name}")
                        }
                    }
                }
            }
        }
    }
}

我与项目依赖项有正常的依赖关系：

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    ...
    implementation 'com.google.guava:guava:11.0.2'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:0.22.5'
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:0.22.5'
    // Note: These are Android Library projects
    implementation project(':genericutils')
    implementation project(':module2')
    ...
}

当我运行任务copyBuildDependencies时，我得到以下错误：

Executing task 'copyBuildDependencies'...

Executing tasks: [copyBuildDependencies]

Configuration on demand is an incubating feature.

FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':BiometricInterfaceLib:copyBuildDependencies'.
> Could not resolve all task dependencies for configuration ':BiometricInterfaceLib:releaseCompileClasspath'.
> More than one variant of project :genericutils matches the consumer attributes:
    - Configuration ':genericutils:releaseApiElements' variant android-aidl:
        - Found artifactType 'android-aidl' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':genericutils:releaseApiElements' variant android-classes:
        - Found artifactType 'android-classes' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':genericutils:releaseApiElements' variant android-manifest:
        - Found artifactType 'android-manifest' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':genericutils:releaseApiElements' variant android-renderscript:
        - Found artifactType 'android-renderscript' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':genericutils:releaseApiElements' variant jar:
        - Found artifactType 'jar' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
> More than one variant of project :module2 matches the consumer attributes:
    - Configuration ':module2:releaseApiElements' variant android-aidl:
        - Found artifactType 'android-aidl' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':module2:releaseApiElements' variant android-classes:
        - Found artifactType 'android-classes' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':module2:releaseApiElements' variant android-manifest:
        - Found artifactType 'android-manifest' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':module2:releaseApiElements' variant android-renderscript:
        - Found artifactType 'android-renderscript' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.
    - Configuration ':module2:releaseApiElements' variant jar:
        - Found artifactType 'jar' but wasn't required.
        - Required com.android.build.api.attributes.BuildTypeAttr 'release' and found compatible value 'release'.
        - Found com.android.build.api.attributes.VariantAttr 'release' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'Aar' and found compatible value 'Aar'.
        - Required org.gradle.usage 'java-api' and found compatible value 'java-api'.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 2s
16:39:07: Task execution finished 'copyBuildDependencies'.

我可以在configurations.releaseCompileClasspath上使用排除模块选项，但是assembleRelease任务会失败，因为它找不到依赖项。

编辑:我创建了一个示例项目，以帮助显示我所追求的结果和我所面临的问题：https://gitlab.com/crunchy234/android-gradle-dependencies-export

--编辑2--

之所以需要库模块的依赖关系而不是库的Jar，是因为可以创建Xamarin绑定库。

因此，Xamarin绑定所需要的是库的AAR (示例代码中的主模块)和库依赖项的所有Jars。例如：

mastermodule/build/dependencies/
├── animated-vector-drawable-28.0.0-alpha3.aar-classes.jar
├── annotations-13.0.jar
...
├── collections-28.0.0-alpha3.jar
├── common-1.1.1.jar
├── coordinatorlayout-28.0.0-alpha3.aar-classes.jar
...
etc

Answer 1

如果我正确理解

1. 您的项目是一个Android库项目。
2. 复制任务尝试复制AAR库中的所有AAR。
3. 重命名classes.jar。

可能下面就是你想要的。将其添加到build.gradle下的根项目中。

// Add this into the build.gradle under **root** project.
// Add the modules that you want to exclude from having this copyXXXJar task.
def modulesExcluded = [
        'app',
        'mastermodulewantedoutput'
]

subprojects { prj ->

    // Skip excluded modules
    if (modulesExcluded.contains(prj.name)) {
        prj.afterEvaluate {
            tasks['preBuild'].dependsOn(copyModuleJars)
        }
        return
    }

    prj.afterEvaluate {

        /**
         * Dynamically create task "copyXXXJar" according to build variant of each library module.
         */
        android.libraryVariants.all { variant ->

            def capitalizedVariantName = variant.name.capitalize()
            def variantName = variant.flavorName
            if (!variantName || variantName == "") {
                variantName = variant.buildType.name
            } else {
                variantName += "-${variant.buildType.name}"
            }
            //================================================================================
            // Define build/copy variant jar and copy to dependencies
            //================================================================================
            def copyJarTask = project.tasks.create("copy${capitalizedVariantName}Jar", Copy) {
                group "Copy Jar"
                description "Rename the classes.jar to ${project.name}-${variantName}.jar and copy it into dist folder."


                def fromDirModule = "$buildDir/outputs/aar/${project.name}-${variantName}.aar"
                def intoDirModule = "$rootDir/dependencies/$variant.buildType.name"
                from(zipTree(fromDirModule))
                into(intoDirModule)
                include('*.jar')
                include('libs/*.jar')
                rename('classes.jar', "${project.name}-${variantName}.jar")

                dependsOn "assemble${capitalizedVariantName}"
            }
            copyModuleJars.dependsOn(copyJarTask)
        }
    }
}

// Task to copy all the modules' jars. It can be run with command [ ./gradlew copyModuleJars ]
task copyModuleJars {
    group = 'Copy Jar'
    description = 'Copy the classes.jar from each module.'
} 

运行下面的命令来验证

./gradlew copyModuleJars

希望能帮上忙。

-编辑的

我检查了你的gitlab项目。看起来你只需要.aar里面的罐子。我想说的是，这可能会导致一些问题，因为您删除了相关的res文件、aidl文件、资产和R.txt等，这些文件被认为是.aar库的必要部分。例如，您的依赖关系aar appcompat-v7-28.0.0-alpha3，在解压缩时实际上将具有下面的布局，而不仅仅是classes.jar。

此外，您可以像我前面编辑的那样简单地修改modulesExcluded数组。并且可以消除"hasProperty()“的状态检查。

输出将在"$rootDir/dependencies".下如下所示：

• 调试
  • genericutils-debug.jar
  • mastermodule-debug.jar

​

• 释放
  • genericutils-release.jar
  • mastermodule-release.jar

​

这些jars是从您自己的源代码(即genericutils和mastermodule源代码)中生成的。如果库的传递依赖关系是".jar“格式，它们将进入.aar的"libs/”格式，如果它们是".aar“格式，我认为您不能简单地选择它的classes.jar，但是去掉它相关的和必要的部分，除非您有一些特殊的要求，而那些缺失的部分与您的项目无关。

-编辑2

如果您只关心源代码，并且不使用代码逻辑中的任何资源(res、R.txt、aidl、jni等)，例如，您的genericutils模块可能就是这样的情况，那么您只需选择classes.jar。当您将它作为普通Java库使用时，它不会引起任何问题。