Define common library version centrally in top-level build.gradle file

This should make it easier to upgrade libraries in the future and provide
an overview over which versions we are using as well as keep them
consistent throughout the project.

bramble-android/build.gradle

@@ -27,7 +27,7 @@ dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
 	implementation fileTree(dir: 'libs', include: '*.jar')
 
-	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+	annotationProcessor "com.google.dagger:dagger-compiler:$daggerVersion"
 
 	compileOnly 'javax.annotation:jsr250-api:1.0'
 }
@@ -55,8 +55,6 @@ dependencyVerification {
 }
 
 ext.torBinaryDir = 'src/main/res/raw'
-ext.torVersion = '0.2.9.12'
-ext.geoipVersion = '2017-09-06'
 ext.torDownloadUrl = 'https://briarproject.org/build/'
 
 def torBinaries = [

bramble-api/build.gradle

@@ -5,15 +5,15 @@ targetCompatibility = 1.8
 apply plugin: 'witness'
 
 dependencies {
-	implementation "com.google.dagger:dagger:2.0.2"
+	implementation "com.google.dagger:dagger:$daggerVersion"
 	implementation 'com.google.code.findbugs:jsr305:3.0.2'
 
-	testImplementation 'junit:junit:4.12'
+	testImplementation "junit:junit:$junitVersion"
-	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock:$jmockVersion"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:$jmockVersion"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:$jmockVersion"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-library:$hamcrestVersion"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:$hamcrestVersion"
 }
 
 dependencyVerification {

bramble-core/build.gradle

@@ -13,17 +13,17 @@ dependencies {
 	implementation 'org.bitlet:weupnp:0.1.4'
 	implementation 'net.i2p.crypto:eddsa:0.2.0'
 
-	apt 'com.google.dagger:dagger-compiler:2.0.2'
+	apt "com.google.dagger:dagger-compiler:$daggerVersion"
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
-	testImplementation 'junit:junit:4.12'
+	testImplementation "junit:junit:$junitVersion"
-	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock:$jmockVersion"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:$jmockVersion"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:$jmockVersion"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-library:$hamcrestVersion"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:$hamcrestVersion"
 
-	testApt 'com.google.dagger:dagger-compiler:2.0.2'
+	testApt "com.google.dagger:dagger-compiler:$daggerVersion"
 }
 
 dependencyVerification {

bramble-j2se/build.gradle

@@ -12,16 +12,16 @@ dependencies {
 	implementation 'net.java.dev.jna:jna:4.4.0'
 	implementation 'net.java.dev.jna:jna-platform:4.4.0'
 
-	apt 'com.google.dagger:dagger-compiler:2.0.2'
+	apt "com.google.dagger:dagger-compiler:$daggerVersion"
 
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
 	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
-	testImplementation 'junit:junit:4.12'
+	testImplementation "junit:junit:$junitVersion"
-	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock:$jmockVersion"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:$jmockVersion"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:$jmockVersion"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-library:$hamcrestVersion"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:$hamcrestVersion"
 }
 
 dependencyVerification {

briar-android/build.gradle

@@ -6,7 +6,6 @@ dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
 	implementation project(path: ':bramble-android', configuration: 'default')
 
-	def supportVersion = '27.0.1'
 	implementation "com.android.support:support-v4:$supportVersion"
 	implementation("com.android.support:appcompat-v7:$supportVersion") {
 		exclude module: 'support-v4'
@@ -34,7 +33,7 @@ dependencies {
 	implementation 'com.github.bumptech.glide:glide:3.8.0'
 	implementation 'uk.co.samuelwall:material-tap-target-prompt:2.1.0'
 
-	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+	annotationProcessor "com.google.dagger:dagger-compiler:$daggerVersion"
 
 	compileOnly 'javax.annotation:jsr250-api:1.0'
 
@@ -43,12 +42,12 @@ dependencies {
 	testImplementation 'org.robolectric:robolectric:3.5.1'
 	testImplementation 'org.robolectric:shadows-support-v4:3.0'
 	testImplementation 'org.mockito:mockito-core:2.8.9'
-	testImplementation 'junit:junit:4.12'
+	testImplementation "junit:junit:$junitVersion"
-	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock:$jmockVersion"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:$jmockVersion"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:$jmockVersion"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-library:$hamcrestVersion"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:$hamcrestVersion"
 }
 
 dependencyVerification {

briar-core/build.gradle

@@ -13,20 +13,20 @@ dependencies {
 	implementation 'com.squareup.okhttp3:okhttp:3.8.0'
 	implementation 'org.jsoup:jsoup:1.10.3'
 
-	apt 'com.google.dagger:dagger-compiler:2.0.2'
+	apt "com.google.dagger:dagger-compiler:$daggerVersion"
 
 	testImplementation project(path: ':bramble-core', configuration: 'default')
 	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
 	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
 	testImplementation 'net.jodah:concurrentunit:0.4.2'
-	testImplementation 'junit:junit:4.12'
+	testImplementation "junit:junit:$junitVersion"
-	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock:$jmockVersion"
-	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:$jmockVersion"
-	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:$jmockVersion"
-	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-library:$hamcrestVersion"
-	testImplementation "org.hamcrest:hamcrest-core:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:$hamcrestVersion"
 
-	testApt 'com.google.dagger:dagger-compiler:2.0.2'
+	testApt "com.google.dagger:dagger-compiler:$daggerVersion"
 }
 
 dependencyVerification {

build.gradle

@@ -21,13 +21,24 @@ buildscript {
 	dependencies {
 		classpath 'com.android.tools.build:gradle:3.0.1'
 		classpath 'net.ltgt.gradle:gradle-apt-plugin:0.9'
-		classpath 'de.undercouch:gradle-download-task:3.2.0'
+		classpath 'de.undercouch:gradle-download-task:3.3.0'
 		classpath files('libs/gradle-witness.jar')
 	}
 }
 
+
+ext {
+	// Define common library version centrally
+	daggerVersion = '2.0.2'
+	supportVersion = '27.0.1'
+	junitVersion = '4.12'
+	jmockVersion = '2.8.2'
+	hamcrestVersion = '1.3'
+	torVersion = '0.2.9.12'
+	geoipVersion = '2017-09-06'
+
 	// If a Java 6 JRE is available, check we're not using any Java 7 or 8 APIs
-ext.useJava6StandardLibrary = { task ->
+	useJava6StandardLibrary = { task ->
 		def home = System.env.JAVA_6_HOME;
 		if (home != null && !home.isEmpty()) {
 			println "Setting Java 6 bootstrap classpath for ${task.name}"
@@ -39,6 +50,7 @@ ext.useJava6StandardLibrary = { task ->
 			)
 		}
 	}
+}
 
 // Create a jar containing the java.lang.invoke classes for the Java 6 bootstrap classpath
 task createJavaLangInvokeJar(type: Zip) {