Better dependency exclusion.

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IClasspathDependency.kt

@@ -36,4 +36,6 @@ interface IClasspathDependency {
 
     /** Used to only keep the most recent version for an artifact if no version was specified */
     val shortId: String
+
+    val excluded: ArrayList<Dependencies.ExcludeConfig>
 }

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IDependencyManager.kt

@@ -1,8 +1,10 @@
 package com.beust.kobalt.api
 
-import com.beust.kobalt.maven.aether.Filters
+import com.beust.kobalt.maven.aether.Filters.EXCLUDE_OPTIONAL_FILTER
+import com.beust.kobalt.maven.aether.KobaltMavenResolver
 import com.beust.kobalt.maven.aether.Scope
 import org.eclipse.aether.graph.DependencyFilter
+import org.eclipse.aether.graph.DependencyNode
 
 /**
  * Manage the creation of dependencies and also provide dependencies for projects.
@@ -38,7 +40,43 @@ interface IDependencyManager {
      * allDependencies is typically either compileDependencies or testDependencies
      */
     fun calculateDependencies(project: Project?, context: KobaltContext,
-            dependencyFilter: DependencyFilter = Filters.EXCLUDE_OPTIONAL_FILTER,
+            dependencyFilter: DependencyFilter = createDependencyFilter(project?.compileDependencies ?: emptyList()),
             scopes: List<Scope> = listOf(Scope.COMPILE),
             vararg passedDependencies: List<IClasspathDependency>): List<IClasspathDependency>
+
+    /**
+     * Create an Aether dependency filter that uses the dependency configuration included in each
+     * IClasspathDependency.
+     */
+    fun createDependencyFilter(dependencies: List<IClasspathDependency>) : DependencyFilter {
+        return DependencyFilter { p0, p1 ->
+            fun isNodeExcluded(passedDep: IClasspathDependency, node: DependencyNode) : Boolean {
+                val dep = create(KobaltMavenResolver.artifactToId(node.artifact))
+                return passedDep.excluded.any { ex -> ex.isExcluded(dep)}
+            }
+
+            val accept = dependencies.any {
+                // Is this dependency excluded?
+                val isExcluded = isNodeExcluded(it, p0)
+
+                // Is the parent dependency excluded?
+                val isParentExcluded =
+                    if (p1.any()) {
+                        isNodeExcluded(it, p1[0])
+                    } else {
+                        false
+                    }
+
+                // Only accept if no exclusions were found
+                ! isExcluded && ! isParentExcluded
+            }
+
+            if (! accept) {
+                println("  FOUND EXCLUDED DEP: " + p0)
+            }
+
+            if (accept) EXCLUDE_OPTIONAL_FILTER.accept(p0, p1)
+            else accept
+        }
+    }
 }

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/Project.kt

@@ -145,7 +145,7 @@ class Dependencies(val project: Project,
      * future tasks receive a get(), the repos will be correct.
      */
     private fun addToDependencies(project: Project, dependencies: ArrayList<IClasspathDependency>,
-            dep: Array<out String>, optional: Boolean = false): List<Future<File>>
+            dep: Array<out String>, optional: Boolean = false, excludeConfig: ExcludeConfig? = null): List<Future<File>>
         = with(dep.map {
             val resolved =
                 if (KobaltMavenResolver.isRangeVersion(it)) {
@@ -160,12 +160,36 @@ class Dependencies(val project: Project,
             DependencyManager.create(resolved, optional, project.directory)
         }) {
             dependencies.addAll(this)
+            if (excludeConfig != null) {
+                this.forEach { it.excluded.add(excludeConfig) }
+            }
+
             this.map { FutureTask { it.jarFile.get() } }
         }
 
     @Directive
     fun compile(vararg dep: String) = addToDependencies(project, dependencies, dep)
 
+    class ExcludeConfig {
+        val ids = arrayListOf<String>()
+
+        @Directive
+        fun excludeIds(vararg passedIds: String) = ids.addAll(passedIds)
+
+        fun isExcluded(dep: IClasspathDependency) : Boolean {
+            val result = ids.contains(dep.id)
+            return result
+        }
+    }
+
+    @Directive
+    fun compile(dep: String, init: ExcludeConfig.() -> Unit) {
+        val excludeConfig = ExcludeConfig().apply {
+            init()
+        }
+        addToDependencies(project, dependencies, arrayOf(dep), excludeConfig = excludeConfig)
+    }
+
     @Directive
     fun compileOptional(vararg dep: String) {
         addToDependencies(project, optionalDependencies, dep, optional = true)

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompiler.kt

@@ -23,8 +23,8 @@ class JvmCompiler @Inject constructor(val dependencyManager: DependencyManager)
             flags: List<String>): TaskResult {
 
         // Dependencies
-        val allDependencies = (info.dependencies
-                + dependencyManager.calculateDependencies(project, context!!, passedDependencies = info.dependencies))
+        val allDependencies = (info.dependencies + dependencyManager.calculateDependencies(project, context!!,
+                passedDependencies = info.dependencies))
             .distinct()
 
         // Plugins that add flags to the compiler

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/internal/JvmCompilerPlugin.kt

@@ -88,6 +88,7 @@ open class JvmCompilerPlugin @Inject constructor(
         if (testContributor != null && testContributor.affinity(project, context) > 0) {
 //            val td1 = dependencyManager.testDependencies(project, context)
             val testDependencies = dependencyManager.calculateDependencies(project, context,
+                    dependencyFilter = dependencyManager.createDependencyFilter(project.testDependencies),
                     scopes = listOf(Scope.TEST))
             val compileDependencies = dependencyManager.calculateDependencies(project, context,
                     scopes = listOf(Scope.COMPILE))

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/DependencyManager.kt

@@ -178,11 +178,11 @@ class DependencyManager @Inject constructor(val executors: KobaltExecutors,
             dependencyFilter: DependencyFilter? = null,
             requiredBy: String? = null): List<IClasspathDependency> {
         val result = arrayListOf<IClasspathDependency>()
-        dependencies.forEach {
-            result.add(it)
-            if (it.isMaven) {
-                val resolved = resolver.resolveToIds(it.id, null, dependencyFilter)
-                result.addAll(resolved.map { create(it) })
+        dependencies.forEach { dependency ->
+            result.add(dependency)
+            if (dependency.isMaven) {
+                val resolved = resolver.resolveToIds(dependency.id, null, dependencyFilter).map { create(it) }
+                result.addAll(resolved)
             }
         }
         val reordered = reorderDependencies(result)

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/aether/AetherDependency.kt

@@ -1,5 +1,6 @@
 package com.beust.kobalt.maven.aether
 
+import com.beust.kobalt.api.Dependencies
 import com.beust.kobalt.api.IClasspathDependency
 import com.beust.kobalt.api.Kobalt
 import com.beust.kobalt.maven.CompletedFuture
@@ -65,6 +66,8 @@ class AetherDependency(val artifact: Artifact, override val optional: Boolean =
 
     override val shortId = artifact.groupId + ":" + artifact.artifactId + ":" + artifact.classifier
 
+    override val excluded = arrayListOf<Dependencies.ExcludeConfig>()
+
     override fun compareTo(other: AetherDependency): Int {
         return Versions.toLongVersion(artifact.version).compareTo(Versions.toLongVersion(
                 other.artifact.version))

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/maven/dependency/FileDependency.kt

@@ -1,5 +1,6 @@
 package com.beust.kobalt.maven.dependency
 
+import com.beust.kobalt.api.Dependencies
 import com.beust.kobalt.api.IClasspathDependency
 import com.beust.kobalt.maven.CompletedFuture
 import org.apache.maven.model.Dependency
@@ -31,6 +32,8 @@ open class FileDependency(open val fileName: String, override val optional: Bool
 
     override fun directDependencies() = arrayListOf<IClasspathDependency>()
 
+    override val excluded = arrayListOf<Dependencies.ExcludeConfig>()
+
     override fun compareTo(other: FileDependency) = fileName.compareTo(other.fileName)
 
     override fun toString() = fileName