ghidra/gradle/root/jacoco.gradle

import groovy.io.FileType;

apply plugin:'jacoco'

dependencies {
   jacocoAnt 'org.jacoco:org.jacoco.ant:0.8.2'
   jacocoAgent 'org.jacoco:org.jacoco.agent:0.8.2'
}

def String jacocoRootExecPath = "$buildDir/jacoco/jacocoMerge.exec"

delete new File(jacocoRootExecPath) // If the merged exec file (output from jacocoMerge) exists,
                				    // jacocoReport & jacocoBranchReport tasks are skipped and 
				                    // the report is not generated.
				                    // So always delete the merged file before the determination
				                    // to skip a task is made.

/*********************************************************************************
  * Generate the Jacoco excludes list from file (this will strip out comments and
  * whitespace).
  *
  * This uses 'gradle/support/jacoco.excludes.src.txt' to generate list of 
  * class exclusions for the 'jacocoReport' task.
  * 
  * Task to generate an aggregate jacoco report from subprojects with 
  * Java sourceSets
  *********************************************************************************/
def String[] generateExcludesList() {

	File inputFile = new File(rootProject.projectDir, "gradle/support/jacoco.excludes.src.txt")

	def lines = inputFile.readLines()
					 .findAll({ line -> 
					 	!shouldIgnoreLine(line)
					 })
					 .collect()
	return lines
}

/* An ignorable line is one that is only whitespace or that starts with a comment marker */
def shouldIgnoreLine(line) {
	if (line.startsWith('#')){
		return true
	}
	
	if (line.startsWith("//")) {
		return true
	}
	
	if (line.trim().isEmpty()) {
		return true
	}
	
	return false
}

List excludesList = generateExcludesList()

/*********************************************************************************
 * Task to merge multiple jacoco execution data files into one
 *********************************************************************************/
task jacocoMerge(type: JacocoMerge) {
   description = 'Task to merge multiple jacoco execution data files into one.'
   destinationFile = new File(jacocoRootExecPath)
   dependsOn { subprojects.findAll { p -> p.plugins.hasPlugin('jacoco') }.test }
   dependsOn { subprojects.findAll { p -> p.plugins.hasPlugin('jacoco') }.integrationTest }
   executionData fileTree(rootDir) {
     include '**/*.exec'
   }
}

/*********************************************************************************
 * Task to generate an aggregate jacoco report from subprojects with 
 * Java sourceSets
 *********************************************************************************/
task jacocoReport(type: JacocoReport, group: 'Coverage reports') {
   description = 'Generates an aggregate Jacoco report from all subprojects'
   dependsOn 'jacocoMerge'
   executionData new File(jacocoRootExecPath)
   
   // Setting these source/class dirs MUST be done in the configuration phase (we used
   // to do it in a doFirst block but that was deprecated in later gradle builds). However,
   // we have to delay evaluation of the subprojects (using the '{ }' notation) to wait for
   // some project attributes (eg: 'sourceSets') to be made available.
   additionalSourceDirs files({ subprojects.findAll { p -> p.plugins.hasPlugin('jacoco') }.sourceSets.main.java.srcDirs })  
   additionalClassDirs files({ subprojects.findAll { p -> p.plugins.hasPlugin('jacoco') }.sourceSets.main.output }).asFileTree.matching {
      exclude excludesList
   }
  
   reports {
      html {
         enabled true
         destination new File(rootDir.absolutePath + "/jacocoReport")
      }
      xml {
         enabled false
      }
   }
}