detekt - Static code analysis for Kotlin - Kotlin Resources


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Meet detekt, a static code analysis tool for the Kotlin programming language. It operates on the abstract syntax tree provided by the Kotlin compiler.

detekt in action


  • Code smell analysis for your Kotlin projects
  • Complexity reports based on lines of code, cyclomatic complexity and amount of code smells
  • Highly configurable rule sets
  • Suppression of findings with Kotlin’s @Suppress and Java’s @SuppressWarnings annotations
  • Specification of quality gates which will break your build
  • Code Smell baseline and whitelisting for legacy projects
  • Gradle plugin for code analysis via Gradle builds
  • Gradle tasks to use local IntelliJ distribution for formatting and inspecting Kotlin code
  • SonarQube integration
  • Extensibility by enabling incorporation of personal rule sets, FileProcessListener's and OutputReport's
  • IntelliJ integration
  • Unofficial Maven plugin by Ozsie

Project Website

Visit the project website for installation guides, release notes, migration guides, rule descriptions and configuration options.

Quick Start …

with the command-line interface

```shell script git clone cd detekt ./gradlew build shadowJar java -jar detekt-cli/build/libs/detekt-cli-[version]-all.jar –help

#### with Gradle

Gradle 5.0+ is required:

buildscript {
    repositories {

    // or

    jcenter {
        content {
            // just allow to include kotlinx projects
            // detekt needs 'kotlinx-html' for the html report
            includeGroup "org.jetbrains.kotlinx"

plugins {

detekt {
    failFast = true // fail build on any finding
    buildUponDefaultConfig = true // preconfigure defaults
    config = files("$projectDir/config/detekt.yml") // point to your custom config defining rules to run, overwriting default behavior
    baseline = file("$projectDir/config/baseline.xml") // a way of suppressing issues before introducing detekt

    reports {
        html.enabled = true // observe findings in your browser with structure and code snippets
        xml.enabled = true // checkstyle like format mainly for integrations like Jenkins
        txt.enabled = true // similar to the console output, contains issue signature to manually edit baseline files

tasks {
    withType<Detekt> {
        // Target version of the generated JVM bytecode. It is used for type resolution.
        this.jvmTarget = "1.8"

See bintray for releases and artifactory for snapshots.

Adding more rule sets

detekt itself provides a wrapper over KtLint as a formatting rule set which can be easily added to the Gradle configuration:

dependencies {
    detektPlugins "io.gitlab.arturbosch.detekt:detekt-formatting:[version]"

Likewise custom extensions can be added to detekt.


If you contributed to detekt but your name is not in the list, please feel free to add yourself to it!


androidweekly androidweekly

As mentioned in…



compile "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:1.0.1"

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