Detekt task with junit output for Gitlab

build.gradle

detekt {
    reports {
        xml {
            enabled = true // enable the checkstyle report
        }
    }
}

task junitDetekt {
    def inXslt = "$rootDir/xslt/checkstyle2junit.xslt" // comes from https://github.com/koalaman/shellcheck/wiki/JUnit
    def inXml = "${project.buildDir}/reports/detekt/detekt.xml" // Uses project.buildDir so that you can use this with a multiproject setup
    def out = "${project.buildDir}/reports/detekt/junit.xml"

    description "Converts Checkstyle from Detekt to junit for gitlab"
    inputs.files inXslt, inXml
    outputs.files out
    doLast {
        ant.xslt(in: inXml, out: out, style: inXslt)
        println "Wrote junit detekt file out to $out"
    }
}

project.tasks.findByName("detekt").finalizedBy junitDetekt

checkstyle2junit.xslt

<?xml version="1.0" encoding="UTF-8"?><!-- FROM https://github.com/koalaman/shellcheck/wiki/JUnit -->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output encoding="UTF-8" method="xml"></xsl:output>

  <xsl:template match="/">
    <testsuite>
      <xsl:attribute name="tests">
        <xsl:value-of select="count(.//file)" />
      </xsl:attribute>
      <xsl:attribute name="failures">
        <xsl:value-of select="count(.//error)" />
      </xsl:attribute>
      <xsl:for-each select="//checkstyle">
        <xsl:apply-templates />
      </xsl:for-each>
    </testsuite>
  </xsl:template>

  <xsl:template match="file">
    <testcase>
      <xsl:attribute name="classname">
        <xsl:value-of select="@name" />
      </xsl:attribute>
      <xsl:attribute name="name">
        <xsl:value-of select="@name" />
      </xsl:attribute>
      <xsl:apply-templates select="node()" />
    </testcase>
  </xsl:template>

  <xsl:template match="error">
    <failure>
      <xsl:attribute name="type">
        <xsl:value-of select="@source" />
      </xsl:attribute>
      <xsl:text>Line </xsl:text>
      <xsl:value-of select="@line" />
      <xsl:text>: </xsl:text>
      <xsl:value-of select="@message" />
    </failure>
  </xsl:template>
</xsl:stylesheet>