sbt plugin to show a summary of compilation messages.
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sbt-errors-summary for sbt 0.13

A simple plugin that makes the error reporter a bit more concise.

I find it useful when doing refactoring: I get a lot of compilation errors, and I waste a lot of time switching between files and looking for line numbers in the error message, when I can immediately see what's wrong when looking at the faulty line.

This plugin helps by summarizing all the errors per file.

Side by side comparison (this plugin on the left, origin on the right):


[info] Compiling 2 Scala sources to /Users/martin/Desktop/foo/target/scala-2.12/classes...
[error] [E1] src/main/scala/Bar.scala
[error]      type mismatch;
[error]       found   : String("")
[error]       required: Int
[error]      L2:  val x: Int = ""
[error]      L2:               ^
[warn]  [E2] src/main/scala/Bar.scala
[warn]       @deprecated now takes two arguments; see the scaladoc.
[warn]       L4:  @deprecated
[warn]       L4:   ^
[error] [E3] src/main/scala/Foo.scala
[error]      not found: value foobar
[error]      L2:  def foo: String = foobar
[error]      L2:                    ^
[error] src/main/scala/Bar.scala: L2 [E1], L4 [E2]
[error] src/main/scala/Foo.scala: L2 [E3]
[info] Legend: Ln = line n, Cn = column n, En = error n
[error] (compile:compileIncremental) Compilation failed
[error] Total time: 0 s, completed Jul 3, 2017 3:00:27 PM


To enable this plugin globally, simply put the following in ~/.sbt/0.13/plugins/plugins.sbt:

addSbtPlugin("org.duhemm" % "sbt-errors-summary" % "0.6.0")

You can also enable it for a specific project by putting the same line in project/plugins.sbt in your sbt project.


This reporter supports several configuration options that let you change how errors are reported. The configuration can be accessed via the reporterConfig setting key. A configuration is represented by an instance of a ReporterConfig, which is generated from a Contraband schema.

The examples can be copy pasted directly inside you global settings in sbt (~/.sbt/0.13/global.sbt) or inside your build definition. If you enabled this plugin globally and want to configure it globally, you'll also need to add the following import:

import sbt.errorssummary.Plugin.autoImport._

or start sbt with set to true.

The supported configuration options include:

  • colors: Boolean = true: Determines whether the reporter will produce a colored and formatted (as in bold, underlined, etc.) output. Defaults to true. Example:

    reporterConfig := reporterConfig.value.withColors(false)

    All the colors are configurable. See ReporterConfig.contra to see all the existing configuration keys.

  • shortenPaths: Boolean = true: Determines whether the reporter will strip the current working directory from paths it displays. Defaults to true. Example:

    reporterConfig := reporterConfig.value.withShortenPaths(false)
  • columnNumbers: Boolean = false: Determines whether the reporter will show the column number at which an error has been recorded, Defaults to false. Example:

    reporterConfig := reporterConfig.value.withColumnNumbers(false)
  • reverseOrder: Boolean = false: Determines whether the reproter will show the error messages in reverse order (first error displayed at the bottom of the screen.) Defaults to false. Example:

    reporterConfig := reporterConfig.value.withReverseOrder(false)
  • showLegend: Boolean = true: Determines whether to show a legend at the bottom for the various types of numbers (line, column, error). Note that despite this setting, a legend will still only be shown if there actually are errors, and not otherwise. Example:

    reporterConfig := reporterConfig.value.withShowLegend(false)



  • Cross publish for sbt 1.0


  • Add reporterConfig key to configure the reporter. See examples in previous section.
  • Add configurable colors in #21
  • Hide unknown positions in some errors in #24
  • Option to reverse order of error messages (first error shown last) in #28
  • Improve readability and show faulty line number on the left in #27 by @yawaramin
  • Add option to show legend in #27 by @yawaramin


  • Re-fix display of relative path in #20


  • Fix display of relative path in #10
  • Add ReporterConfig to configure how the reporter displays error messages in #15
  • Add config option to show column number in #16
  • Support source position mappers in #17
  • Support printWarnings task in #18


  • Show offending line again
  • Better alignment of messages
  • Write tests for the reporter, again multiple Scala versions in #4 and #5
  • Address feedback from discussion on Scala contributors in #6
    • Start numbering problems at 1
    • Add a newline after file path
    • Highlight file name and line number
    • Disable colors and formatting in CI and Ensime
  • Relativize file paths from working directory in #7


  • Apply compilerReporter to Compile and Test configurations, by @jvican and @Duhemm in #1 and #2.


  • Initial version