build.sbt

import sbt.io.IO
import scala.sys.process.Process
import ReleaseTransformations._

enablePlugins(SbtPlugin)

scalaVersion := "2.12.8"
organization := "com.github.zainab-ali"
name := "sbt-sammy"
description := "A friendly policer of compiler warnings"
licenses += ("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0.html"))

// Taken from @tpolecat's https://tpolecat.github.io/2017/04/25/scalac-flags.html
scalacOptions ++= Seq(
  "-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.
  "-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:constant",                   // Evaluation of a constant arithmetic expression results in an error.
  "-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.
  "-Yno-adapted-args",                 // Do not adapt an argument list (either by inserting () or creating a tuple) to match the receiver.
  "-Ypartial-unification",             // Enable partial unification in type constructor inference
  "-Ywarn-dead-code",                  // Warn when dead code is identified.
  "-Ywarn-extra-implicit",             // Warn when more than one implicit parameter section is defined.
  "-Ywarn-inaccessible",               // Warn about inaccessible types in method signatures.
  "-Ywarn-infer-any",                  // Warn when a type argument is inferred to be `Any`.
  "-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-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-value-discard"               // Warn when non-Unit expression results are unused.
)


releaseCrossBuild := false
releaseProcess := Seq[ReleaseStep](
  checkSnapshotDependencies,
  inquireVersions,
  runClean,
  releaseStepCommandAndRemaining("^ scripted"),
  setReleaseVersion,
  commitReleaseVersion,
  tagRelease,
  releaseStepCommandAndRemaining("^ publish"),
  releaseStepTask(updateVersionInExampleProject),
  setNextVersion,
  commitNextVersion,
  pushChanges
)

/** Inspired by https://github.com/cb372/sbt-explicit-dependencies/blob/master/build.sbt - thank you @cb372! */
lazy val updateVersionInExampleProject = taskKey[Unit]("update the version of the plugin used in the example project")
updateVersionInExampleProject := {
  val pluginsFile = baseDirectory.value / "example/project/plugins.sbt"
  val content =
    s"""addSbtPlugin("com.github.zainab-ali" % "sbt-sammy" % "${version.value}")"""
  IO.write(pluginsFile, content)

  val gitCommand = List(
    "git",
    "commit",
    "-m", "Update plugin version in example project",
    "example/project/plugins.sbt"
  )
  Process(gitCommand).!
}


scriptedLaunchOpts ++= Seq("-Dplugin.version=" + version.value)