Update secret key configuration

.gitignore

@@ -14,3 +14,6 @@
 
 # mpeltonen/sbt-idea plugin
 .idea_modules/
+
+/secrets.gradle.kts
+/*.keystore

app/.gitignore

@@ -1,3 +1,2 @@
 /build
-/src/main/res/values/secrets.xml
-/google-services.json
+/google-services.json

app/build.gradle

@@ -4,6 +4,25 @@ apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-kapt'
 apply plugin: 'io.fabric'
 
+def secretsFilename = "secrets.gradle.kts"
+try {
+    apply from: "$rootDir/$secretsFilename"
+} catch (e) {
+    throw new GradleException(
+            "To build this project, you must make a `$secretsFilename` file that provides the " +
+                    "required secrets keys.\n" +
+                    "To get your secret keys, go here: " +
+                    "https://app.put.io/settings/account/oauth/apps" +
+                    """
+Example `$secretsFilename`:
+
+extra["secrets"] = PutioSecrets(
+  putioClientId = "your put.io Client ID",
+  putioApiKey = "your put.io API key"
+)
+""", e)
+}
+
 repositories {
     maven {
         url 'https://maven.fabric.io/public'
@@ -25,14 +44,30 @@ android {
                 arg("room.schemaLocation", "$projectDir/schemas")
             }
         }
+
+        resValue "string", "putio_client_id", secrets.putioClientId
+        resValue "string", "putio_api_key", secrets.putioApiKey
+    }
+    signingConfigs {
+        if (secrets.keystorePath != null) {
+            release {
+                storeFile file(secrets.keystorePath)
+                storePassword secrets.keystorePassword
+                keyAlias secrets.keyAlias
+                keyPassword secrets.keyPassword
+            }
+        }
     }
     buildTypes {
         debug {
             versionNameSuffix "-debug"
-            manifestPlaceholders = [crashlyticsEnabled:false]
+            manifestPlaceholders = [crashlyticsEnabled: false]
         }
         release {
-            manifestPlaceholders = [crashlyticsEnabled:true]
+            if (signingConfigs.findByName("release") != null) {
+                signingConfig signingConfigs.release
+            }
+            manifestPlaceholders = [crashlyticsEnabled: true]
         }
     }
     lintOptions {

buildSrc/.gitignore

@@ -0,0 +1 @@
+/build

buildSrc/build.gradle

@@ -0,0 +1,22 @@
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.3.11'
+}
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+}
+
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+compileTestKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}

buildSrc/src/main/java/PutioSecrets.kt

@@ -0,0 +1,9 @@
+class PutioSecrets(
+    val keystorePath: String? = null,
+    val keystorePassword: String? = null,
+    val keyAlias: String? = null,
+    val keyPassword: String? = null,
+
+    val putioClientId: String,
+    val putioApiKey: String
+)