Fix Settings Scope

Add test
Update README.md

Author: Anton Troshin

.travis.yml

@@ -13,7 +13,7 @@ stages:
 jobs:
   include:
     - stage: build
-      script: sbt ++$TRAVIS_SCALA_VERSION test
+      script: sbt ++$TRAVIS_SCALA_VERSION scripted
     - stage: publish
       script: sbt ++$TRAVIS_SCALA_VERSION releaseEarly;
 

README.md

@@ -17,17 +17,27 @@ Add the plugin as SBT dependency to your `project/plugins.sbt`
 ```
 resolvers += Resolver.bintrayRepo("ironsonic", "sbt-plugins")
 
-addSbtPlugin("com.supersonic" % "sonic-dependency-tree" % "0.0.1")
+addSbtPlugin("com.supersonic" % "sonic-dependency-tree" % "0.0.2")
 ```
 
-Since it is an Auto Plugin, no need to explicitly enable it on the root project.
+Since it is an Auto Plugin, no need to explicitly enable it.
 
 If you still wish to do so, you can do it like this:
 ``` scala
 lazy val root = (project in file("."))
   .enablePlugins(SonicDependencyTreePlugin)
 ```
 
+## Important Note
+All Settings and Task are defined as `Global` and should be defined somewhere in `build.sbt` but not on individual projects.
+
+For example:
+```scala
+sonicDependenciesS3BasePath in Global := "my-folder"
+sonicDependenciesS3Bucket in Global := "dependencies-bucket"
+sonicDependenciesUploadFilename in Global := "dependencies.json"
+```
+ 
 ## Settings
 
 - `sonicDependenciesExcludeScalaLibrary` : `Boolean`
@@ -60,16 +70,12 @@ lazy val root = (project in file("."))
 ## S3 configuration
 You can upload the dependency tree of the project to AWS S3 using this command `sbt sonicDependenciesUploadToS3`
 
-Since the upload task is for the whole project, settings for it should be set on the root project.
+Reminder: Because the upload task is Global, the settings should be defined using `in Global` scope.
 For example:
 ``` scala
-lazy val root = (project in file("."))
-  .enablePlugins(SonicDependencyTreePlugin).
-  .settings(
-    sonicDependenciesS3BasePath := "my-folder",
-    sonicDependenciesS3Bucket := "dependencies-bucket",
-    sonicDependenciesUploadFilename := "dependencies.json"
-  )
+sonicDependenciesS3BasePath in Global := "my-folder",
+sonicDependenciesS3Bucket in Global := "dependencies-bucket",
+sonicDependenciesUploadFilename in Global := "dependencies.json"
 ```
 This will upload the file to `S3://dependencies-bucket/my-folder/dependencies.json`
 

src/main/scala/com/supersonic/SonicDependencyTreePlugin.scala

@@ -4,7 +4,7 @@ import com.amazonaws.{ClientConfiguration, Protocol}
 import com.amazonaws.auth.{AWSStaticCredentialsProvider, BasicAWSCredentials, DefaultAWSCredentialsProviderChain}
 import com.amazonaws.services.s3.AmazonS3ClientBuilder
 import play.api.libs.json.{Json, Writes}
-import sbt._
+import sbt.{Def, _}
 import scala.sys.process.Process
 import scala.util.{Failure, Success, Try}
 
@@ -27,11 +27,13 @@ object SonicDependencyTreePlugin extends AutoPlugin {
 
   override def trigger = allRequirements
 
-  override lazy val buildSettings = Seq(
-    sonicDependenciesExcludeScalaLibrary in Global := false,
+  override def globalSettings: Seq[Def.Setting[_]] = baseSettings
+
+  private lazy val baseSettings = Seq(
+    sonicDependenciesExcludeScalaLibrary := false,
     sonicDependenciesGitCommit := println(commitHash),
-    sonicDependenciesS3BasePath in Global := "",
-    sonicDependenciesS3Bucket in Global := "",
+    sonicDependenciesS3BasePath := "",
+    sonicDependenciesS3Bucket := "",
     sonicDependenciesS3Credentials := Seq.empty,
     sonicDependenciesUploadFilename := s"$commitHash.json",
     sonicDependencies := printTreeTask.value,
@@ -41,15 +43,15 @@ object SonicDependencyTreePlugin extends AutoPlugin {
 
   private def uploadDependenciesTask = Def.task {
 
-    val s3BasePathValue = sonicDependenciesS3BasePath.value
     val s3BucketValue = sonicDependenciesS3Bucket.value
+    val s3BasePathValue = sonicDependenciesS3BasePath.value
 
     val log = Keys.streams.value.log
 
-    if (Option(s3BucketValue).isEmpty) {
+    if (s3BucketValue == null || s3BucketValue.isEmpty) {
       throw new MessageOnlyException("sonicDependenciesS3Bucket is not set")
     }
-    if (Option(s3BasePathValue).isEmpty) {
+    if (s3BasePathValue == null || s3BasePathValue.isEmpty) {
       throw new MessageOnlyException("sonicDependenciesS3BasePath is not set")
     }
 

src/sbt-test/sonic-dependency-tree/simple/build.sbt

@@ -1,7 +1,17 @@
+sonicDependenciesExcludeScalaLibrary in Global:= true
+sonicDependenciesS3BasePath in Global := "s3testPath"
+sonicDependenciesS3Bucket in Global := "s3testBucket"
+sonicDependenciesUploadFilename in Global := "testFileName.json"
 
 lazy val root = (project in file("."))
-  .enablePlugins(SonicDependencyTreePlugin)
   .settings(
     scalaVersion := "2.11.12",
-    version := "0.1"
+    version := "0.1",
+    TaskKey[Unit]("check") in Global := {
+      if(sonicDependenciesExcludeScalaLibrary.value != true) sys.error("sonicDependenciesExcludeScalaLibrary not correct")
+      if(sonicDependenciesS3BasePath.value != "s3testPath") sys.error("sonicDependenciesS3BasePath not correct")
+      if(sonicDependenciesS3Bucket.value != "s3testBucket") sys.error("sonicDependenciesS3Bucket not correct")
+      if(sonicDependenciesUploadFilename.value != "testFileName.json") sys.error("sonicDependenciesUploadFilename not correct")
+      ()
+    }
   )

src/sbt-test/sonic-dependency-tree/simple/test

@@ -1 +1 @@
-> sonicDependencies
+> check