introduce WarningConfig DSL

lib/src/main/scala/org/typelevel/scalacoptions/WarningConfig.scala

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalacoptions
+
+sealed trait WarningAction
+
+case object silent extends WarningAction
+case object error  extends WarningAction
+
+sealed trait WarningActionWithVerbosity extends WarningAction { action =>
+
+  def summary: WarningAction = new WarningAction {
+    override def toString = s"$action-summary"
+  }
+
+  def verbose: WarningAction = new WarningAction {
+    override def toString = s"$action-verbose"
+  }
+}
+
+case object warning extends WarningActionWithVerbosity
+case object info    extends WarningActionWithVerbosity
+
+sealed class WarningFilter(val asString: String) {
+  override def toString: String = asString
+
+  def &(that: WarningFilter): WarningFilter = new WarningFilter(
+    Seq(this.asString, that.asString).mkString("&")
+  )
+}
+
+case object any                     extends WarningFilter("any")
+final case class cat(cat: String)   extends WarningFilter(s"cat=$cat")
+final case class msg(regex: String) extends WarningFilter(s"msg=$regex")
+final case class src(regex: String) extends WarningFilter(s"src=$regex")
+
+final case class origin(segments: String*)
+  extends WarningFilter(s"origin=${segments.mkString(raw"\.")}")
+
+final case class WarningConfig(rules: (WarningFilter, WarningAction)*) {
+
+  override def toString: String = {
+    val conf = rules.toSeq
+      .map { case (filter, action) => Seq(filter, action).mkString(":") }
+      .mkString(",")
+    s"-Wconf:$conf"
+  }
+
+  def asScalacOption: ScalacOption =
+    ScalacOption(
+      option = this.toString,
+      isSupported = {
+        case ScalaVersion(2, 12, x) => x >= 13
+        case ScalaVersion(2, 13, x) => x >= 2
+        case _                      => false
+      }
+    )
+}

lib/src/test/scala/org/typelevel/scalacoptions/WarningConfigSuite.scala

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2022 Typelevel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.typelevel.scalacoptions
+
+class WarningConfigSuite extends munit.ScalaCheckSuite {}