How to manually include external aar package using new Gradle Android Build System

In my case I have some depencies in my library and when I create an aar from it I failed, because of missed depencies, so my solution is to add all depencies from my lib with an arr file.

So my project level build.gradle looks so:

buildscript {
    repositories {
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.2'
    }
}

allprojects {
    repositories {
        mavenCentral()
        //add it to be able to add depency to aar-files from libs folder in build.gradle(yoursAppModule)
        flatDir {

            dirs 'libs'
        }
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

build.gradle(modile app) so:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.example.sampleapp"

        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

    }
}

dependencies {
    //your project depencies
    ...
    //add lib via aar-depency
    compile(name: 'aarLibFileNameHere', ext: 'aar')
    //add all its internal depencies, as arr don't have it
    ...

}

and library build.gradle:

apply plugin: 'com.android.library'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"


    defaultConfig {
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false

            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    //here goes library projects dependencies, which you must include
    //in yours build.gradle(modile app) too
    ...

}