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/*
* Copyright 2017 David Gregory
*
* 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 io.github.davidgregory084
import sbt._
import sbt.Keys._
object TpolecatPlugin extends AutoPlugin {
override def trigger: PluginTrigger = allRequirements
val commonScalacOptions = List(
"-deprecation", // Emit warning and location for usages of deprecated APIs.
"-encoding", "utf-8", // Specify character encoding used by source files.
"-explaintypes", // Explain type errors in more detail.
"-feature", // Emit warning and location for usages of features that should be imported explicitly.
"-language:existentials", // Existential types (besides wildcard types) can be written and inferred
"-language:experimental.macros", // Allow macro definition (besides implementation and application)
"-language:higherKinds", // Allow higher-kinded types
"-language:implicitConversions", // Allow definition of implicit functions called views
"-unchecked", // Enable additional warnings where generated code depends on assumptions.
"-Xcheckinit", // Wrap field accessors to throw an exception on uninitialized access.
"-Xfatal-warnings", // Fail the compilation if there are any warnings.
"-Xfuture", // Turn on future language features.
"-Ywarn-dead-code", // Warn when dead code is identified.
"-Ywarn-inaccessible", // Warn about inaccessible types in method signatures.
"-Ywarn-nullary-override", // Warn when non-nullary `def f()' overrides nullary `def f'.
"-Ywarn-nullary-unit", // Warn when nullary methods return Unit.
"-Ywarn-numeric-widen", // Warn when numerics are widened.
"-Ywarn-value-discard" // Warn when non-Unit expression results are unused.
)
val scalacOptionsGte212 = List(
"-Xlint:constant", // Evaluation of a constant arithmetic expression results in an error.
"-Ywarn-unused:implicits", // Warn if an implicit parameter is unused.
"-Ywarn-unused:imports", // Warn if an import selector is not referenced.
"-Ywarn-unused:locals", // Warn if a local definition is unused.
"-Ywarn-unused:params", // Warn if a value parameter is unused.
"-Ywarn-unused:patvars", // Warn if a variable bound in a pattern is unused.
"-Ywarn-unused:privates", // Warn if a private member is unused.
"-Ywarn-extra-implicit" // Warn when more than one implicit parameter section is defined.
)
val scalacOptionsGte211 = List(
"-Xlint:adapted-args", // Warn if an argument list is modified to match the receiver.
"-Xlint:by-name-right-associative", // By-name parameter of right associative operator.
"-Xlint:delayedinit-select", // Selecting member of DelayedInit.
"-Xlint:doc-detached", // A Scaladoc comment appears to be detached from its element.
"-Xlint:inaccessible", // Warn about inaccessible types in method signatures.
"-Xlint:infer-any", // Warn when a type argument is inferred to be `Any`.
"-Xlint:missing-interpolator", // A string literal appears to be missing an interpolator id.
"-Xlint:nullary-override", // Warn when non-nullary `def f()' overrides nullary `def f'.
"-Xlint:nullary-unit", // Warn when nullary methods return Unit.
"-Xlint:option-implicit", // Option.apply used implicit view.
"-Xlint:package-object-classes", // Class or object defined in package object.
"-Xlint:poly-implicit-overload", // Parameterized overloaded implicit methods are not visible as view bounds.
"-Xlint:private-shadow", // A private field (or class parameter) shadows a superclass field.
"-Xlint:stars-align", // Pattern sequence wildcard must align with sequence component.
"-Xlint:type-parameter-shadow", // A local type parameter shadows a type already in scope.
"-Xlint:unsound-match", // Pattern match may not be typesafe.
"-Ywarn-infer-any" // Warn when a type argument is inferred to be `Any`.
)
val scalacOptionsEq211 = List(
"-Ywarn-unused-import" // Warn if an import selector is not referenced.
)
val scalacOptionsEq210 = List(
"-Xlint"
)
val scalacOptionsLte213 = List(
"-Yno-adapted-args" // Do not adapt an argument list (either by inserting () or creating a tuple) to match the receiver.
)
object autoImport {
def scalacOptionsFor(version: String): Seq[String] =
commonScalacOptions ++ (CrossVersion.partialVersion(version) match {
case Some((2, min)) if min >= 13 => scalacOptionsGte212 ++ scalacOptionsGte211
case Some((2, min)) if min >= 12 => scalacOptionsGte212 ++ scalacOptionsGte211 ++ scalacOptionsLte213
case Some((2, min)) if min >= 11 => scalacOptionsGte211 ++ scalacOptionsEq211 ++ scalacOptionsLte213
case _ => scalacOptionsEq210 ++ scalacOptionsLte213
})
val filterConsoleScalacOptions = { options: Seq[String] =>
options.filterNot(Set(
"-Ywarn-unused:imports",
"-Ywarn-unused-import",
"-Ywarn-dead-code",
"-Xfatal-warnings"
))
}
}
import autoImport._
override def projectSettings: Seq[Setting[_]] = Seq(
scalacOptions ++= scalacOptionsFor(scalaVersion.value),
scalacOptions.in(Compile, console) ~= filterConsoleScalacOptions,
scalacOptions.in(Test, console) ~= filterConsoleScalacOptions
)
}