detekt

Additional

Language
Kotlin
Version
v1.20.0-RC1 (Feb 28, 2022)
Created
Oct 23, 2016
Updated
Mar 22, 2022
Owner
Artur Bosch (arturbosch)
Contributors
Egor Neliuba (egor-n)
Artem Zinnatullin :slowpoke: (artem-zinnatullin)
Evan Tatarka (evant)
Pavlos-Petros Tournaris (pavlospt)
Sebastiano Poggi (rock3r)
Janusz Bagiński (jbaginski)
Jonas Alves (jonasfa)
Sebastian Schuberth (sschuberth)
Róbert Papp (TWiStErRob)
Scott Kennedy (scottkennedy)
Nelson Osacky (runningcode)
Sergey Solovyev (serso)
Brais Gabín (BraisGabin)
Serj Lotutovici (serj-lotutovici)
Rafael Toledo (rafaeltoledo)
Karol Wrótniak (koral--)
Sergii Pechenizkyi (plastiv)
dimsuz
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detekt

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

Features

  • 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 suppression for legacy projects
  • Gradle plugin for code analysis via Gradle builds
  • SonarQube integration
  • Extensibility by enabling incorporation of personal rule sets, FileProcessListener's and OutputReport's
  • IntelliJ integration
  • Third party integrations for Maven, Bazel and Github Actions (Docker based and Javascript based)

Project Website

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

Quick-Links

Quick Start ...

with the command-line interface

curl -sSLO https://github.com/detekt/detekt/releases/download/v[version]/detekt-cli-[version]-all.jar
java -jar detekt-cli-[version]-all.jar --help

You can find other ways to install detekt here

with Gradle

plugins {
    id("io.gitlab.arturbosch.detekt").version("[version]")
}

repositories {
    mavenCentral()
}

detekt {
    buildUponDefaultConfig = true // preconfigure defaults
    allRules = false // activate all available (even unstable) rules.
    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
}

tasks.withType<Detekt>().configureEach {
    reports {
        html.required.set(true) // observe findings in your browser with structure and code snippets
        xml.required.set(true) // checkstyle like format mainly for integrations like Jenkins
        txt.required.set(true) // similar to the console output, contains issue signature to manually edit baseline files
        sarif.required.set(true) // standardized SARIF format (https://sarifweb.azurewebsites.net/) to support integrations with Github Code Scanning
    }
}

// Groovy DSL
tasks.withType(Detekt).configureEach {
    jvmTarget = "1.8"
}
tasks.withType(DetektCreateBaselineTask).configureEach {
    jvmTarget = "1.8"
}

// or

// Kotlin DSL
tasks.withType<Detekt>().configureEach {
    jvmTarget = "1.8"
}
tasks.withType<DetektCreateBaselineTask>().configureEach {
    jvmTarget = "1.8"
}

See maven central for releases and sonatype for snapshots.

If you want to use a SNAPSHOT version, you can find more info on this documentation page.

Requirements

Gradle 6.1+ is the minimum requirement. However, the recommended versions together with the other tools recommended versions are:

Detekt Version Gradle Kotlin AGP Java Target Level JDK Max Version
1.19.0 7.3.0 1.5.31 4.2.2 1.8 17

The list of recommended versions for previous detekt version is listed here.

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.

Contributing

See CONTRIBUTING

Thanks to all the people who contributed to detekt!

Mentions

As mentioned in...

Integrations:

Custom rules and reports from 3rd parties:

Credits