Gradle task `printSourceSets` #gradle

build.gradle

plugins {
    id 'groovy'
}

sourceSets {

    // ...

}

tasks.register('printSourceSets') {
    dependsOn test
    doLast {
        sourceSets.each { def ss ->

            final String BOLD = '\u001b[38;5;226m'
            final String EMPH = '\u001b[38;5;11m'
            final String RST = '\u001b[0m'

            println "\n${BOLD}Sourceset: $ss${RST}\n" + '-'*(ss.toString().length() + 11) + '\n'
            println "${BOLD}properties${RST}: " + prettyfied(
                ss.properties
                .collect { it }
                .groupBy { it.value.getClass().getCanonicalName() }
            )

            ['allSource', 'allJava', 'resources', 'java'].each {
                println "\n${BOLD}$it${RST}:"
                println "    destinationDirectory: " + ss.getProperty(it).getDestinationDirectory()
                println "    classesDirectory: " + ss.getProperty(it).getClassesDirectory()
                println "    ${EMPH}sourceDirectories${RST}: " + prettyfied(
                    ss.getProperty(it).getSourceDirectories().getFiles(), 1
                )
            }
            println()

            println "${BOLD}files in default container `allSource`${RST}:"
            ss.allSource.each {
                println "    $it"
            }
        }
    }
}


String prettyfied(Object o, int level = 0, int indent = 4) {
    if (!(o in Map || o in Collection)) {
        return o.toString()
    }
    if (!o) {
        return (o in Map ? '[:]' : '[]')
    }
    List result = []
    result << '['
    o.each {
        String line = ' ' * (level+1) * indent
        if (o in Map) {
            line += it.key + ': '
        }
        result << line + prettyfied(o in Map ? it.value : it, level+1, indent) + ', '
    }
    result << ' '*level*indent + ']'
    result.join '\n'
}