Dagger implementation

.buckconfig

@@ -0,0 +1,2 @@
+[alias]
+  app = //app:bin_debug

app/build.gradle.kts

@@ -64,6 +64,10 @@ dependencies {
   implementation(deps.android.androidx.corektx)
   implementation(deps.android.androidx.constraintLayout)
 
+
+  implementation(deps.dagger.core)
+  kapt(deps.kapt.dagger)
+
   // Test
   testImplementation(deps.test.junit)
 }

app/src/main/kotlin/com/nickfirmani/template/AppComponent.kt

@@ -0,0 +1,22 @@
+package com.nickfirmani.template
+
+import android.app.Application
+import dagger.BindsInstance
+import dagger.Component
+import javax.inject.Singleton
+
+@Singleton
+@Component(
+  modules = arrayOf(
+    AppModule::class
+  )
+)
+interface AppComponent {
+  @Component.Builder
+  interface Builder {
+    @BindsInstance
+    fun application(application: Application): Builder
+
+    fun build(): AppComponent
+  }
+}

app/src/main/kotlin/com/nickfirmani/template/AppModule.kt

@@ -0,0 +1,17 @@
+package com.nickfirmani.template
+
+import android.app.Application
+import android.content.Context
+import com.nickfirmani.template.annotations.AppContext
+import dagger.Binds
+import dagger.Module
+import javax.inject.Singleton
+
+@Module
+abstract class AppModule {
+
+  @Binds
+  @AppContext
+  @Singleton
+  abstract fun provideApplicationContext(application: Application): Context
+}

app/src/main/kotlin/com/nickfirmani/template/MainActivity.kt

@@ -1,12 +1,12 @@
 package com.nickfirmani.template
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
 
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
-    }
+  override fun onCreate(savedInstanceState: Bundle?) {
+    super.onCreate(savedInstanceState)
+    setContentView(R.layout.activity_main)
+  }
 }

app/src/main/kotlin/com/nickfirmani/template/annotations/AppContext.kt

@@ -0,0 +1,6 @@
+package com.nickfirmani.template.annotations
+
+import javax.inject.Qualifier
+
+@Qualifier
+annotation class AppContext

app/src/main/kotlin/javax/annotation/Generated.java

@@ -0,0 +1,20 @@
+package javax.annotation;
+
+  import java.lang.annotation.Documented;
+  import java.lang.annotation.ElementType;
+  import java.lang.annotation.Retention;
+  import java.lang.annotation.RetentionPolicy;
+  import java.lang.annotation.Target;
+
+// TODO figure out why Buck can't seem to find this file.
+// https://github.com/google/dagger/issues/1449 ?
+@Documented
+@Retention(RetentionPolicy.SOURCE)
+@Target({ElementType.PACKAGE, ElementType.TYPE, ElementType.ANNOTATION_TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.LOCAL_VARIABLE, ElementType.PARAMETER})
+public @interface Generated {
+  String[] value();
+
+  String date() default "";
+
+  String comments() default "";
+}

apply_okbuck.gradle

@@ -10,4 +10,10 @@ okbuck {
       "androidx.*"
     ]
   }
+  externalDependencies {
+    downloadInBuck = false
+  }
+  wrapper {
+    watch += ["**/*/build.gradle.kts", "**/dependencies.kt"]
+  }
 }

buckw

@@ -102,7 +102,8 @@ getChanges ( ) {
         ["type", "f"],
         ["anyof",
             ["suffix", "gradle"],
-            ["name", ["gradle-wrapper.properties"]]
+            ["name", ["gradle-wrapper.properties", "dependencies.kt"]],
+            ["match", "**/*/build.gradle.kts", "wholename"]
         ],
         ["not",
             ["dirname", ".okbuck"]

build.gradle.kts

@@ -18,5 +18,4 @@ allprojects {
   }
 }
 
-apply(from = "apply_okbuck.gradle" )
-
+apply(from = "apply_okbuck.gradle")

buildSrc/src/main/kotlin/dependencies.kt

@@ -3,6 +3,7 @@
 object deps {
   object versions {
     const val kotlin = "1.3.21"
+    const val dagger = "2.22"
   }
 
   object android {
@@ -30,6 +31,14 @@ object deps {
     }
   }
 
+  object dagger {
+    const val core = "com.google.dagger:dagger:${versions.dagger}"
+  }
+
+  object kapt {
+    const val dagger = "com.google.dagger:dagger-compiler:${versions.dagger}"
+  }
+
   object test {
     const val junit = "junit:junit:4.12"
   }

gradle/config-kotlin-sources.gradle

@@ -15,26 +15,27 @@
  */
 
 if (project.plugins.hasPlugin("kotlin")
-    || project.plugins.hasPlugin("org.jetbrains.kotlin.kapt")
-    || project.plugins.hasPlugin("org.jetbrains.kotlin.android")
-    || project.plugins.hasPlugin("org.jetbrains.kotlin.jvm")
-    || project.plugins.hasPlugin("kotlin-android")
-    || project.plugins.hasPlugin("kotlin-kapt")) {
+  || project.plugins.hasPlugin("org.jetbrains.kotlin.kapt")
+  || project.plugins.hasPlugin("org.jetbrains.kotlin.android")
+  || project.plugins.hasPlugin("org.jetbrains.kotlin.jvm")
+  || project.plugins.hasPlugin("kotlin-android")
+  || project.plugins.hasPlugin("kotlin-kapt")) {
   if (project.plugins.hasPlugin("com.android.application")
-      || project.plugins.hasPlugin("com.android.library")) {
+    || project.plugins.hasPlugin("com.android.library")) {
     project.android.sourceSets {
       main.java.srcDirs += 'src/main/kotlin'
       debug.java.srcDirs += 'src/debug/kotlin'
       release.java.srcDirs += 'src/release/kotlin'
       test.java.srcDirs += 'src/test/kotlin'
 
+      // TODO put this back?
       // For kapt stubs
-      main.java.srcDirs += [file("$buildDir/generated/source/kapt/main")]
-      debug.java.srcDirs += [file("$buildDir/generated/source/kapt/debug")]
-      release.java.srcDirs += [file("$buildDir/generated/source/kapt/release")]
-      test.java.srcDirs += [file("$buildDir/generated/source/kapt/test")]
+//      main.java.srcDirs += [file("$buildDir/generated/source/kapt/main")]
+//      debug.java.srcDirs += [file("$buildDir/generated/source/kapt/debug")]
+//      release.java.srcDirs += [file("$buildDir/generated/source/kapt/release")]
+//      test.java.srcDirs += [file("$buildDir/generated/source/kapt/test")]
 
-      // For kotlin code gen during kapt
+//    For kotlin code gen during kapt
       main.java.srcDirs += [file("$buildDir/generated/source/kaptKotlin/main")]
       debug.java.srcDirs += [file("$buildDir/generated/source/kaptKotlin/debug")]
       release.java.srcDirs += [file("$buildDir/generated/source/kaptKotlin/release")]
@@ -46,13 +47,13 @@ if (project.plugins.hasPlugin("kotlin")
     idea {
       module {
         sourceDirs += files(
-            'build/generated/source/kapt/main',
-            'build/generated/source/kaptKotlin/main',
-            'build/tmp/kapt/main/kotlinGenerated')
+          'build/generated/source/kapt/main',
+          'build/generated/source/kaptKotlin/main',
+          'build/tmp/kapt/main/kotlinGenerated')
         generatedSourceDirs += files(
-            'build/generated/source/kapt/main',
-            'build/generated/source/kaptKotlin/main',
-            'build/tmp/kapt/main/kotlinGenerated')
+          'build/generated/source/kapt/main',
+          'build/generated/source/kaptKotlin/main',
+          'build/tmp/kapt/main/kotlinGenerated')
       }
     }
   }