Exclude generated Protobuf messages from coverage

build.gradle

@@ -19,6 +19,8 @@ plugins {
     id('idea')
 }
 
+apply from: 'jacoco.gradle'
+
 group = "tech.relaycorp"
 
 repositories {
@@ -63,53 +65,6 @@ sourceSets {
     }
 }
 
-jacoco {
-    toolVersion = "0.8.5"
-}
-
-jacocoTestReport {
-    reports {
-        xml.enabled = true
-        html.enabled = true
-        html.destination = file("$buildDir/reports/coverage")
-    }
-}
-
-jacocoTestCoverageVerification {
-    violationRules {
-        rule {
-            limit {
-                counter = "CLASS"
-                value = "MISSEDCOUNT"
-                maximum = "0".toBigDecimal()
-            }
-            limit {
-                counter = "METHOD"
-                value = "MISSEDCOUNT"
-                maximum = "0".toBigDecimal()
-            }
-
-            limit {
-                counter = "BRANCH"
-                value = "MISSEDCOUNT"
-                maximum = "0".toBigDecimal()
-            }
-        }
-    }
-}
-
-tasks.test {
-    useJUnitPlatform()
-    testLogging {
-        events("passed", "skipped", "failed")
-    }
-    finalizedBy("jacocoTestReport")
-    doLast {
-        println("View code coverage at:")
-        println("file://$buildDir/reports/coverage/index.html")
-    }
-}
-
 tasks.withType(KotlinCompile).configureEach {
     kotlinOptions.jvmTarget = "1.8"
 }

jacoco.gradle

@@ -0,0 +1,63 @@
+jacoco {
+    toolVersion = "0.8.5"
+}
+
+def jacocoFiles = files([
+        fileTree(
+                dir: project.buildDir,
+                includes: ["generated/source/proto/main/java/"],
+                excludes: [
+                        '**/tech.relaycorp.poweb.internal.protobuf_messages.handshake/**'
+                ]
+        )
+])
+
+jacocoTestReport {
+    classDirectories.from = jacocoFiles
+
+    reports {
+        xml.enabled = true
+        html.enabled = true
+        html.destination = file("$buildDir/reports/coverage")
+    }
+}
+
+jacocoTestCoverageVerification {
+    afterEvaluate {
+        classDirectories.from = jacocoFiles
+    }
+
+    violationRules {
+        rule {
+            limit {
+                counter = "CLASS"
+                value = "MISSEDCOUNT"
+                maximum = "0".toBigDecimal()
+            }
+
+            limit {
+                counter = "METHOD"
+                value = "MISSEDCOUNT"
+                maximum = "0".toBigDecimal()
+            }
+
+            limit {
+                counter = "BRANCH"
+                value = "MISSEDCOUNT"
+                maximum = "0".toBigDecimal()
+            }
+        }
+    }
+}
+
+test {
+    useJUnitPlatform()
+    testLogging {
+        events("passed", "skipped", "failed")
+    }
+    finalizedBy("jacocoTestReport")
+    doLast {
+        println("View code coverage at:")
+        println("file://$buildDir/reports/coverage/index.html")
+    }
+}