如何对本地 gradle 依赖项进行版本控制？

Question

My Android project contains a library that is shipped as AAR file.

There are multiple options to include local AAR files. I can declare a file dependency: implementation files('libs/mylib.aar')

Or I can put the AAR into another module and then use a project dependency: implementation project(':mylibmodule')

However, I want to specify the exact version of my library: mylib:1.0.0

Unfortunately, I do not know how to specify the version without using some remote repository. Note that I do not want to upload the library to JitPack, MavenCentral or similar. All I want is to specify the version of a local AAR file.

Update

The AAR file is a Zip-File with the following content:

/proguard.txt      
/R.txt             
/AndroidManifest.xml  
/public.txt        
/classes.jar       
/res/values/values.xml  

Note that the AndroidManifest.xml contains the version of the library. However, I assume that gradle always expects a pom file for the versioning information.

Answer 1

I realized that gradle allows to specify a local Maven repository at a specific path:

repositories {
   maven {
       url uri("${projectDir}/mylibdir")
   }
}

To use a local Maven repository, I need to build my library as a Maven artifact. To create a Maven artifact, it suffices to create a POM file in the right subfolder. The AAR file remains unchanged since Maven does not care about the artifact format. Creating a Maven artifact can be automated with the maven-publish plugin, eg:

apply plugin: 'maven-publish'

publishing {
    publications {
        myRelease(MavenPublication) {
            groupId 'com.foo'
            artifactId 'my-artifact'
            version '1.0.0'
            artifact("$buildDir/outputs/aar/my-artifact.aar")
        }
    }
    repositories {
        maven {
            url "$buildDir/repo"
        }
    }
}

However, since I do not really need to use Maven, the simpler choice is to add the version to the AAR file name. I did this with the following snippet in the build.gradle of my library:

android.libraryVariants.all { variant ->
        variant.outputs.all {
            outputFileName = "${archivesBaseName}-${variant.name}-${defaultConfig.versionName}.aar"
        }
    }