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Duplicate files copied to APK META-INF / library_release.kotlin_module

I recently added two Android Libraries via JitPack and I have the following error:

Duplicate files copied in APK META-INF/library_release.kotlin_module

I cleared the caching and I tried to exclude the module using

exclude group: 'org.jetbrains'

and

exclude group: 'org.jetbrains.kotlin'

but it seems the issue persists. Is there a way to stop adding kotlin stdlib via JitPack? Oddly enough, other libraries like DbFlow don't have this problem, although I don't see anything special about setting them up (other than not via JitPack)

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3 answers


You have to add this to build.gradle

your application file inside a tagandroid 



packagingOptions {
    exclude 'META-INF/library_release.kotlin_module'
}
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Looking at other conflicts, it seems that the resolution

packagingOptions {
    pickFirst 'META-INF/library_release.kotlin_module'
}


under android

in gradle app.

This allows apk to build

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As suggested : jetbrains

Make sure these .kotlin_module files are not removed by your packaging process.

Thus, we cannot use the exclude

option to exclude this resource file from the moment of creation.

As described in this post , we must:

in Maven we use groupId and artifactId for module names, but you can tell

<configuration>
    <moduleName>com.example.mymodule</moduleName>
</configuration>

in Gradle its project name + build task name to set up:

compileKotlin {
    kotlinOptions.moduleName = "com.example.mymodule"    
}

This is my config for the library project Android

:

ext {
    GROUP_ID = 'custom.group.id'
    ARTIFACT_ID = 'artifactid'
}

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.0"

    compileOptions {
        kotlinOptions.freeCompilerArgs += ['-module-name', "$GROUP_ID.$ARTIFACT_ID"]
    }

    defaultConfig {
        ...
    }
    buildTypes {
        ...
    }
}

A resource file named META-INF/custom.group.id.artifactId.kotlin_module

will be created instead. META-INF/library_release.kotlin_module

No more duplicate files will be found.

You can read this post and this post for more information.

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