Merge pull request novoda#32 from novoda/plugin/dependencies

Introduce dependencies plugin

build.gradle

@@ -1,16 +1,25 @@
+apply plugin: DependenciesPlugin
+
 subprojects {
     buildscript {
         repositories {
             jcenter()
         }
         dependencies {
-            classpath 'com.novoda:bintray-release:0.4.0'
-            classpath 'com.novoda:gradle-build-properties-plugin:0.2'
-            classpath 'org.ajoberstar:gradle-git:1.6.0'
+            classpath gradlePlugins.bintrayRelease
+            classpath gradlePlugins.buildProperties
+            classpath gradlePlugins.gradleGit
         }
     }
 
     repositories {
         jcenter()
     }
+
+    project.plugins.withType(JavaBasePlugin) {
+        project.with {
+            sourceCompatibility = JavaVersion.VERSION_1_7
+            targetCompatibility = JavaVersion.VERSION_1_7
+        }
+    }
 }

buildSrc/build.gradle

@@ -0,0 +1,9 @@
+repositories {
+    jcenter()
+}
+
+apply plugin: 'groovy'
+
+dependencies {
+    compile gradleApi()
+}

buildSrc/src/main/groovy/DependenciesPlugin.groovy

@@ -0,0 +1,11 @@
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+
+class DependenciesPlugin implements Plugin<Project> {
+
+    @Override
+    void apply(Project project) {
+        project.extensions.create('gradlePlugins', GradlePlugins)
+        project.extensions.create('libraries', Libraries, project)
+    }
+}

buildSrc/src/main/groovy/GradlePlugins.groovy

@@ -0,0 +1,5 @@
+class GradlePlugins {
+    final bintrayRelease = 'com.novoda:bintray-release:0.4.0'
+    final buildProperties = 'com.novoda:gradle-build-properties-plugin:0.2'
+    final gradleGit = 'org.ajoberstar:gradle-git:1.6.0'
+}

buildSrc/src/main/groovy/Libraries.groovy

@@ -0,0 +1,26 @@
+import org.gradle.api.Project
+
+class Libraries {
+    final junit = 'junit:junit:4.12'
+    final truth = 'com.google.truth:truth:0.30'
+    final guava = 'com.google.guava:guava:19.0'
+    final findbugs = new Findbugs()
+
+    private final Project project
+
+    Libraries(Project project) {
+        this.project = project
+    }
+
+    def getGradleApi() {
+        project.dependencies.gradleApi()
+    }
+
+    def getGradleTestKit() {
+        project.dependencies.gradleTestKit()
+    }
+
+    private static class Findbugs {
+        final annotations = 'com.google.code.findbugs:jsr305:3.0.0'
+    }
+}

plugin/build.gradle

@@ -2,9 +2,6 @@ apply plugin: 'groovy'
 apply plugin: 'java-gradle-plugin'
 apply from: rootProject.file('gradle/publish.gradle')
 
-sourceCompatibility = JavaVersion.VERSION_1_7
-targetCompatibility = JavaVersion.VERSION_1_7
-
 sourceSets {
     test {
         java {
@@ -23,13 +20,13 @@ sourceSets {
 }
 
 dependencies {
-    compile gradleApi()
+    compile libraries.gradleApi
 
-    testCompile gradleTestKit()
-    testCompile 'junit:junit:4.12'
-    testCompile 'com.google.truth:truth:0.30'
-    testCompile 'com.google.guava:guava:19.0'
-    testCompile 'com.google.code.findbugs:jsr305:3.0.0'
+    testCompile libraries.gradleTestKit
+    testCompile libraries.junit
+    testCompile libraries.truth
+    testCompile libraries.guava
+    testCompile libraries.findbugs.annotations
 
     testRuntime files(pluginUnderTestMetadata)
 }