Add dependency scopes option for scripting resolvers

libraries/scripting/dependencies/src/kotlin/script/experimental/dependencies/impl/SimpleExternalDependenciesResolverOptionsParser.kt

@@ -9,7 +9,7 @@ import kotlin.script.experimental.api.*
 import kotlin.script.experimental.dependencies.ExternalDependenciesResolver
 
 private val nameRegex = Regex("^[^\\S\\r\\n]*([a-zA-Z][a-zA-Z0-9-_]*)\\b")
-private val valueRegex = Regex("^[^\\S\\r\\n]*([a-zA-Z0-9-_]+)\\b")
+private val valueRegex = Regex("^[^\\S\\r\\n]*([a-zA-Z0-9-_,]+)\\b")
 private val equalsRegex = Regex("^[^\\S\\r\\n]*=")
 
 /**

libraries/scripting/dependencies/src/kotlin/script/experimental/dependencies/impl/resolverNamedOptions.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.script.experimental.dependencies.impl
+
+import kotlin.script.experimental.dependencies.ExternalDependenciesResolver
+
+fun ExternalDependenciesResolver.Options.value(name: DependenciesResolverOptionsName) =
+    value(name.key)
+
+fun ExternalDependenciesResolver.Options.flag(name: DependenciesResolverOptionsName) =
+    flag(name.key)
+
+operator fun MutableMap<String, String>.set(key: DependenciesResolverOptionsName, value: String) {
+    put(key.key, value)
+}
+
+/**
+ * These names are for convenience only.
+ * They don't have to be implemented in all resolvers.
+ */
+enum class DependenciesResolverOptionsName(optionName: String? = null) {
+    TRANSITIVE,
+    SCOPE;
+
+    val key = optionName ?: name.toLowerCase()
+}
+
+val ExternalDependenciesResolver.Options.transitive
+    get() = flag(DependenciesResolverOptionsName.TRANSITIVE)
+
+val ExternalDependenciesResolver.Options.dependencyScopes
+    get() = value(DependenciesResolverOptionsName.SCOPE)?.split(",")