Allow to turn off whole rulesets in configuration file - Closes#7

detekt-api/src/main/kotlin/io/gitlab/arturbosch/detekt/api/RuleSetProvider.kt

@@ -4,5 +4,12 @@ package io.gitlab.arturbosch.detekt.api
  * @author Artur Bosch
  */
 interface RuleSetProvider {
+	fun buildRuleset(config: Config): RuleSet? {
+		val ruleSet = instance(config)
+		val subConfig = config.subConfig(ruleSet.id)
+		val active = subConfig.valueOrDefault("active") { true }
+		return if (active) ruleSet else null
+	}
+
 	fun instance(config: Config): RuleSet
 }

detekt-api/src/test/resources/detekt.yml

@@ -18,4 +18,7 @@ style:
   WildcardImport:
     active: true
   NoElseInWhenExpression:
-    active: true
+    active: true
+
+comments:
+  active: false

detekt-core/src/main/kotlin/io/gitlab/arturbosch/detekt/core/Detekt.kt

@@ -27,9 +27,9 @@ class Detekt(project: Path,
 	fun run(): Map<String, List<Finding>> {
 		val ktFiles = compiler.compile()
 		val providers = loadProviders()
-		val futures = providers.map {
-			task { it.instance(config).acceptAll(ktFiles) }
-		}
+		val futures = providers.map { it.buildRuleset(config) }
+				.filterNotNull()
+				.map { task { it.acceptAll(ktFiles) } }
 		return awaitAll(futures).toMap()
 	}