Gradle BuildConfig.class build error

Questions & Answers
1

Hi all,

I am using few SDK’s, but this is more general question.
When i try to build using new Gradle system then i get this:

[ERROR] [org.gradle.BuildExceptionReporter] > com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.dex.DexException: Multiple dex files define Lcom/twitter/sdk/android/core/BuildConfig;

I know, it’s classic BuildConfig.class duplicate file error:)

things that do work:

  1. Manualy repack all jar/aar from exported project without not needed classes/files (i did not try it, but i believe)
  2. use DEPRECATED packageBuildConfig = false

I need different, cleaner, correct way to exclude classes or other files from compile/build.

I have already spend two days reading gradle manuals, tuts, posts, examples… google… but nothing works.
You can see it in commented code.

I am new to Gradle (14 days) so maybe i am missing some obvious things.
I think it should be done like this:

  1. tell gradle somehow that i dont want some classes to unpack from jar/aar to buildfolder
    example: witter-core\build\intermediates\classes\release\com witter\sdk\android\core\BuildConfig.class
    or
  2. if there is no way to exclude files from unpacking from jar/aar to buildfolder then
    there must be a way to exclude some classes from compiled build while compiling.
    or
  3. if there is no way to exclude files from compiling then
    there must be a way to delete not needed files/classes from buildfolder before compiling.

i have tried every examples i can find but they do not work for me:(
not needed files are unpacked, not deleted and compiled.

Can you please help me?

main build.gradle:

buildscript {
	repositories {
		jcenter()
		//mavenCentral()
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:2.1.0'
	}
}    
allprojects {
   repositories {
      flatDir {
        dirs 'libs'
      }
   }
}    
apply plugin: 'com.android.application'
//apply plugin: 'java'

dependencies {
	compile fileTree(dir: 'libs', include: ['*.jar'])
	compile(name: 'appcompat-v7-23.4.0', ext:'aar')
	compile(name: 'cardview-v7-23.4.0', ext:'aar')
	compile(name: 'common', ext:'aar')
	compile(name: 'facebook-android-sdk-4.17.0', ext:'aar')
	compile(name: 'facebook-android-wrapper-7.9.0', ext:'aar')
	compile(name: 'GoogleAIDL', ext:'aar')
	compile(name: 'GooglePlay', ext:'aar')
	compile(name: 'play-services-ads-10.2.1', ext:'aar')
	{ exclude module: '**/BuildConfig*' }
//	{ exclude '**/BuildConfig.class' , module '*'}
	compile(name: 'play-services-ads-lite-10.2.1', ext:'aar')
	....
	compile(name: 'play-services-games-10.2.1', ext:'aar')
	compile(name: 'support-v4-24.0.0', ext:'aar')
	compile project(':fabric')
	compile project(':fabric-init')
	compile project(':GoogleMobileAdsPlugin')
	compile project(':MainLibProj')
	compile project(':tweet-composer')
	compile project(':twitter-core')
	compile project(':twitterkit-deps')
	compile project(':twitterkit-wrapper')
}    
android {
	compileSdkVersion 25
	buildToolsVersion '25.0.3'
	//packageBuildConfig = false

	defaultConfig {
		targetSdkVersion 25
		minSdkVersion 16
		applicationId 'com.company.app'
	}
	sourceSets {
	    main {
		java {
		    //srcDir "$buildDir\\intermediates\\classes\\debug\\"

		    //exclude "$buildDir\\intermediates\\classes\\debug\\com\\company\\app\\BuildConfig.class"
    		    exclude "$buildDir/intermediates/classes/debug/com/company/app/BuildConfig*"
		    //exclude "com/company/app/BuildConfig*"
		    //exclude '**/BuildConfig.class'
		    println 'Tesst6'
		    println "$buildDir"
	       }
	   }
	}
	lintOptions {
		abortOnError false
	}
	signingConfigs { release {
		storeFile file('D:/WorkUnity/keys/private.keystore')
		storePassword '****'
		keyAlias 'private'
		keyPassword '****'
	} }
	buildTypes {
		debug {
			jniDebuggable true
			//buildConfigField("String", "BUILD_TIME", "\"0\"")
			//resValue("string", "build_time", "0")
		}
		release {
			//exclude ('**/BuildConfig.class')
			minifyEnabled false
			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
			signingConfig signingConfigs.release

			//buildConfigField("String", "BUILD_TIME", "\"1\"")
			//resValue("string", "build_time", "1")  //${minutesSinceEpoch}
		}
	}
	packagingOptions {
		exclude 'META-INF/LICENSE.txt'
		exclude '**/thumbs.db'
		exclude '**/BuildConfig.class'
	}
}
//sourceSets {
	//main {
		//java {
			//srcDir 'src'
			//exclude '**/BuildConfig.class'
			//}
		//}
//}
task removeBuildConfig(dependsOn: "compileReleaseSources") {
    println 'Tesst7 - task removeBuildConfig'
    file("$buildDir\\intermediates\\classes\\debug\\com\\company\\app\\BuildConfig.class").delete()

    doFirst {
        //file("$buildDir\\intermediates\\classes\\debug\\com\\company\\app\\BuildConfig.class").delete()
	println 'Tesst8 - task removeBuildConfig'
    }
}     
task androidReleaseJar(type: Jar, dependsOn: assembleRelease) {
    from "$buildDir/intermediates/classes/release/"
    exclude '**/BuildConfig.class'
    exclude '**/R.class'
    exclude '**/R$*.class'
    println 'Tesst1 - task androidReleaseJar'
}    
task androidDebugJar(type: Jar, dependsOn: assembleDebug) {
    from "$buildDir/intermediates/classes/debug/"
    exclude '**/BuildConfig.class'
    exclude '**/R.class'
    exclude '**/R$*.class'
    println 'Tesst2 - task androidDebugJar'
}

task jar(type: Jar) {
  from '$buildDir/intermediates/classes/release'
    exclude '**/BuildConfig.class'
    exclude '**/R.class'
    println 'Tesst3 - task jar'
}    
//task jarDebug(type: Jar) {
  //from 'build/intermediates/classes/debug'
    //exclude '**/BuildConfig.class'
    //exclude '**/R.class'
    //println 'Tesst4'
//}    
jar {
    exclude("$buildDir\\intermediates\\classes\\debug\\com\\company\\app\\BuildConfig.class")   
    println 'Tesst10 - jar{}'
}    
task cleanTempDir(type: Delete) {
	delete file("$buildDir\\intermediates\\classes\\debug\\com\\company\\app\\BuildConfig.class")
        //delete fileTree(dir: "tempDir", exclude: "dont_delete.txt")
	println 'Tesst11 - task cleanTempDir'
}

one of modules build.gradle:

buildscript {
	repositories {
		mavenCentral()
	}
	dependencies {
		classpath 'com.android.tools.build:gradle:2.1.0'
	}
}
apply plugin: 'android-library'
//apply plugin: 'java'

dependencies {
	compile fileTree(dir: 'bin', include: ['*.jar'])
	compile fileTree(dir: 'libs', include: ['*.jar'])
}
android {
	sourceSets {
		main {
			manifest.srcFile 'AndroidManifest.xml'
			//java.srcDirs = ['src']
			res.srcDirs = ['res']
			assets.srcDirs = ['assets']

			java {
    			    //srcDir "$buildDir/intermediates/classes"
			    srcDir "$buildDir"
			    //exclude "$buildDir/intermediates/classes/release/com/twitter/sdk/android/core/BuildConfig.class"
			    exclude "**\\intermediates\\classes\\release\\com\	witter\\sdk\\android\\core\\BuildConfig.class"
			    exclude "**\\BuildConfig.class"
			    println 'Tesst6'
			    println "$buildDir"
			}
		}
	}    
	compileSdkVersion 25
	buildToolsVersion '25.0.3'
	//packageBuildConfig = false

	defaultConfig {
		targetSdkVersion 22
	}
	lintOptions {
		abortOnError false
	}
}    
task removeBuildConfig(type: Jar) {
    println 'Tesst7 - task removeBuildConfig'
    //file("$buildDir/intermediates/classes/debug/**/BuildConfig.class").delete()

    doFirst {
        //file("$buildDir/intermediates/classes/debug/**/BuildConfig.class").delete()
	println 'Tesst8 - task removeBuildConfig'
    }
}     
task androidReleaseJar(type: Jar, dependsOn: assembleRelease) {
    from "$buildDir/intermediates/classes/release/"
    exclude '**/BuildConfig.class'
    exclude '**/R.class'
    exclude '**/R$*.class'
    println 'Tesst1 - task androidReleaseJar'
}    
task androidDebugJar(type: Jar, dependsOn: assembleDebug) {
    from "$buildDir/intermediates/classes/debug/"
    exclude '**/BuildConfig.class'
    exclude '**/R.class'
    exclude '**/R$*.class'
    println 'Tesst2 - task androidDebugJar'
}    
task jar(type: Jar) {
  from '$buildDir/intermediates/classes/release'
    exclude '**/BuildConfig.class'
    exclude '**/R.class'

    println 'Tesst3 - task jar'
}
2

@Kodl Try disable tasks generateDebugBuildConfig and generateReleaseBuildConfig by placing this code at the end of mainTemplate.gradle for all your problem projects:

['crashlytics', 'crashlytics-wrapper', 'fabric', 'fabric-init', 'twitter-core'].each { name ->
project(":$name").tasks.whenTaskAdded { task ->
	if (task.name == 'generateDebugBuildConfig' || task.name == 'generateReleaseBuildConfig' ) {
    	task.enabled = false
	}
}

}