Gradle Warnings Plugin

What is it?

A Gradle plugin to produce a report of the warnings output by the compiler. This improves the visibility of these warnings, which many would just ignore if using an IDE to compile the code.

Such reports exist in CI systems such as Jenkins, but it's useful to have ways to get a warning report locally before pushing changes to code.

This was mostly created as a reaction to SonarQube not showing the actual compiler warnings. SonarQube encourages developers to fix whatever it considers to be an issue, while frequently overlooking compiler warnings. This was causing developers to spend time just satisfying SonarQube rather than improving the quality of the code or the speed of the build by reducing the actual warning count.

Usage

Using the plugins DSL:

plugins {
    id("garden.ephemeral.warnings") version "VERSION"
}

Using legacy plugin application:

buildscript {
    dependencies {
        classpath("garden.ephemeral.gradle.warnings:gradle-warnings-plugin:VERSION")
    }
}
apply(plugin = "garden.ephemeral.warnings")

Producing the report:

./gradlew warningsReport

Customising the report location:

tasks.named<garden.ephemeral.gradle.warnings.WarningsReport>("warningsReport") {
    reports {
        html.outputLocation.set(file("$buildDir/custom"))
    }
}

Enabling CSV or JSON reports:

tasks.named<garden.ephemeral.gradle.warnings.WarningsReport>("warningsReport") {
    reports {
        csv.required.set(true)
        json.required.set(true)
    }
}

Disabling the report:

tasks.named<garden.ephemeral.gradle.warnings.WarningsReport>("warningsReport") {
    reports {
        html.required.set(false)
    }
}