sarif files need to be combined

Author: wadoon

.github/workflows/code_quality.yml

@@ -76,4 +76,4 @@ jobs:
         uses: github/codeql-action/upload-sarif@v3
         if: (success() || failure())
         with:
-          sarif_file: "build/sarif-results"
+          sarif_file: "build/sarif-results/checkstyle.sarif"

build.gradle

@@ -1,3 +1,5 @@
+
+
 plugins {
     //Support for IntelliJ IDEA
     //https://docs.gradle.org/current/userguide/idea_plugin.html
@@ -504,16 +506,11 @@ tasks.register('alldocJar', Zip){
 }
 
 
-tasks.register('sarifCopy', Copy) {
-    def source = fileTree(dir: '.').matching { include "*/build/reports/checkstyle/main.sarif" }.asCollection()
-    from source
-
-
-    def counter = 0
-    rename { String filename ->
-        return (counter++) + "_.sarif"
-    }
-    into layout.buildDirectory.dir("sarif-results")
+tasks.register('sarifCopy', SarifJoiner) {
+    def source =
+            files(fileTree(dir: '.').matching { include "*/build/reports/checkstyle/main.sarif" })
+    sarifFiles = source
+    outputFile.set(layout.buildDirectory.file("sarif-results/checkstyle.sarif"))
 }
 
 def checkstyleMarkdownReport(File xmlFile, File targetFile) {

buildSrc/build.gradle.kts

@@ -0,0 +1,18 @@
+import org.gradle.kotlin.dsl.plugins
+
+plugins {
+    `kotlin-dsl`
+}
+
+repositories {
+    mavenCentral()
+    gradlePluginPortal()
+}
+
+kotlin {
+    jvmToolchain(21)
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:2.2.0")
+}

buildSrc/src/main/kotlin/SarifCombiner.kt

@@ -0,0 +1,51 @@
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.FileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+import org.jetbrains.kotlin.com.google.gson.Gson
+import org.jetbrains.kotlin.com.google.gson.GsonBuilder
+import org.jetbrains.kotlin.com.google.gson.JsonElement
+import java.io.File
+
+private val JsonElement.getResultsOfFirstRun
+    get() = asJsonObject.get("runs").asJsonArray.get(0).asJsonObject.get("results").asJsonArray
+
+abstract class SarifJoiner : DefaultTask() {
+    @get:InputFiles
+    abstract val sarifFiles: Property<FileCollection>
+
+    @get:OutputFile
+    abstract val outputFile: RegularFileProperty
+
+    @TaskAction
+    fun run() {
+        val inputs = sarifFiles.get().files.toList()
+        if (inputs.isEmpty()) return
+
+        val first = readSarif(inputs.first())
+        val others = inputs.subList(1, inputs.size).map { readSarif(it) }
+
+        for (map in others) {
+            first.getResultsOfFirstRun.addAll(map.getResultsOfFirstRun)
+        }
+
+        writeSarif(outputFile.get().asFile, first)
+    }
+
+    private fun writeSarif(out: File, first: JsonElement) {
+        out.bufferedWriter(Charsets.UTF_8).use {
+            gson.toJson(first, it)
+        }
+    }
+
+
+    private fun readSarif(first: File): JsonElement {
+        first.reader().use {
+            return gson.fromJson(it, JsonElement::class.java)!!
+        }
+    }
+}
+val gson: Gson = GsonBuilder().setPrettyPrinting().create()