build.gradle

buildscript {
    repositories {
        google()
        jcenter()
        mavenLocal()
        maven { url 'https://maven.fabric.io/public' }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.4.1'
        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.40'

        classpath 'com.google.gms:google-services:4.3.0'
        classpath 'com.google.firebase:perf-plugin:1.2.1'
        classpath 'io.fabric.tools:gradle:1.29.0'
    }
}

plugins {
    id 'com.github.ben-manes.versions' version '0.17.0'
}

allprojects {
    repositories {
        google()
        //mavenLocal() must be listed at the top to facilitate testing
        mavenLocal()
        jcenter()
        maven { url 'https://maven.fabric.io/public' }
    }

    // See: https://github.com/ben-manes/gradle-versions-plugin
    dependencyUpdates.resolutionStrategy = {
        componentSelection { rules ->
            rules.all { selection ->
                boolean numbersOnly = (selection.candidate.version ==~ /^[\d.]+$/)
                if (!numbersOnly) {
                    selection.reject("Rejecting: ${selection.candidate.version}")
                }
            }
        }
    }
}

configurations {
    ktlint
}

dependencies {
    ktlint "com.github.shyiko:ktlint:0.31.0"
}

task("ktlint", type: JavaExec, group: "verification") {
    def outputDir = "${project.buildDir}/reports/ktlint/"
    def inputFiles = project.fileTree(dir: "src", include: "**/*.kt")
    def outputFile = "${outputDir}ktlint-checkstyle-report.xml"

    // See:
    // https://medium.com/@vanniktech/making-your-gradle-tasks-incremental-7f26e4ef09c3
    inputs.files(inputFiles)
    outputs.dir(outputDir)

    description = "Check Kotlin code style."
    classpath = configurations.ktlint
    main = "com.github.shyiko.ktlint.Main"
    args = [
        "--format",
        "--android",
        "--reporter=plain",
        "--reporter=checkstyle,output=${outputFile}",
        "**/*.kt",
    ]
}

task clean(type: Delete) {
    delete rootProject.buildDir
}