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find and remove unused scala code

License: MIT License

Scala 99.95% Java 0.05%

scala scalafix-rule sbt-plugin

unused-code's Introduction

Unused Code

find and warn, remove unused public classes, methods by scalafix SyntacticRule.

setup

`project/plugins.sbt`

addSbtPlugin("com.github.xuwei-k" % "unused-code-plugin" % "version")

sbt shell

> unusedCode
> scalafix WarnUnusedCode
> scalafix RemoveUnusedCode

config example

build.sbt

import scala.concurrent.duration.*

ThisBuild / unusedCodeConfig ~= { c =>
  c.copy(
    excludeNameRegex = Set(
      ".*Server"
    ),
    excludePath = c.excludePath ++ Set(
      "glob:some-project/**"
    ),
    excludeGitLastCommit = Some(
      365.days
    ),
    excludeMainMethod = false,
    dialect = unused_code.Dialect.Scala3,
  )
}

unused-code's People

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scala-steward-bot som-snytt monksy hiroshi-cl

unused-code's Issues

Don't remove setter

class A {
  private var b: Int = 0
  def foo_=(a: Int): Unit = b = a
  def foo: Int = b
}

object A{
  (new A).foo = 3
}

Cross compile for Scala 2.11

Is it possible that we can get a version for Scala 2.11?

`unused-code-runner / Test / testLoader is undefined.` if single project

Don't remove if there is `methodName=` name

class D2 {
  def +++(d: D2): D2 = this // don't remove!
}

object D2 {
  def main(args: Array[String]): Unit = {
    var d = new D2
    d +++= d
  }
}

update scalameta and scalafix version

compiler/src/dotty/tools/dotc/transform/patmat/Space.scala:938: error: error in interpolated string: identifier, `this' or block expected
[error]     debug.println(i"checking redundancy in $_match")
[error]                                             ^
[error] 	at scala.meta.internal.parsers.Reporter.syntaxError(Reporter.scala:16)
[error] 	at scala.meta.internal.parsers.Reporter.syntaxError$(Reporter.scala:16)
[error] 	at scala.meta.internal.parsers.Reporter$$anon$1.syntaxError(Reporter.scala:22)
[error] 	at scala.meta.internal.parsers.Reporter.syntaxError(Reporter.scala:17)
[error] 	at scala.meta.internal.parsers.Reporter.syntaxError$(Reporter.scala:17)
[error] 	at scala.meta.internal.parsers.Reporter$$anon$1.syntaxError(Reporter.scala:22)
[error] 	at scala.meta.internal.parsers.ScalametaParser.unquoteExpr(ScalametaParser.scala:2316)
[error] 	at scala.meta.internal.parsers.ScalametaParser.$anonfun$interpolateTerm$1(ScalametaParser.scala:2233)

Don't remove `unary_***` methods

`update` method

object UpdateTest {
  object UpdateTest1 {
    def update(x: Int, y: Int): Unit = ()
  }

  def main(args: Array[String]): Unit = {
    UpdateTest1(2) = 3
  }
}

InvocationTargetException when running unusedCode

When running unusedCode from sbt shell in our codebase we always get:

[error] (Global / unusedCode) java.lang.reflect.InvocationTargetException

with no additional output, for every sbt module. Is it some known issue/limitation of the current version of the plugin? If not, do you know if there is some nice way to track down the real reason behind it? I've tried sbt --verbose --debug but it doesn't help much in this case. I don't have any minimal yet, but I can try to create some