From a31c7ee1900d9a8e03be2bb7171341f25843eeeb Mon Sep 17 00:00:00 2001
From: Aleksandr Turchenko <aleksandr.turchenko@lightspeedhq.com>
Date: Wed, 10 Jul 2024 19:57:27 +0400
Subject: [PATCH] Test merge verify

---
 .github/workflows/verify.yaml | 10 +++++--
 build.gradle.kts              | 49 ++++++++++++++++++++++++++++++++++-
 2 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/verify.yaml b/.github/workflows/verify.yaml
index 160a0d2..cd40a09 100644
--- a/.github/workflows/verify.yaml
+++ b/.github/workflows/verify.yaml
@@ -44,14 +44,20 @@ jobs:
           min-coverage-overall: 50
           min-coverage-changed-files: 60
       - name: Coverage verify
-        id: koververify
         run: ./gradlew koverVerify
+      - name: Read merge.err
+        if: failure()
+        id: readmergeerr
+        run: |
+          cat build/reports/kover/merge.err
       - name: Fail PR if coverage verify fails
         if: failure()
         uses: actions/github-script@v7
         with:
           script: |
-            core.setFailed('Rule violated: lines covered')
+            // read stdout from readmerge
+            const readmergeerr = steps.readmergeerr.outputs.stdout
+            core.setOutput('summary', 'Rule violated: lines covered ' + readmergeerr)
   detekt:
     name: Detekt
     runs-on: ubuntu-latest
diff --git a/build.gradle.kts b/build.gradle.kts
index d7b6553..d0adfbb 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,6 @@
 import io.gitlab.arturbosch.detekt.Detekt
 import io.gitlab.arturbosch.detekt.report.ReportMergeTask
+import kotlinx.kover.gradle.plugin.dsl.tasks.KoverVerifyReport
 
 group = "com.ecwid"
 version = "1.0-SNAPSHOT"
@@ -53,6 +54,41 @@ subprojects {
 }
 
 // Kover
+@CacheableTask
+abstract class KoverVerifyMergeTask : DefaultTask() {
+
+    @get:InputFiles
+    @get:PathSensitive(PathSensitivity.RELATIVE)
+    abstract val input: ConfigurableFileCollection
+
+    @get:OutputFile
+    abstract val output: RegularFileProperty
+
+    @TaskAction
+    fun merge() {
+        logger.info("Input")
+        logger.info(input.files.joinToString(separator = "\n") { it.absolutePath })
+        logger.info("Output = ${output.get().asFile.absolutePath}")
+
+        val existingFiles = input.files.filter { it.exists() }
+        val text = existingFiles.map { it.readText().trim() }
+            .filterNot { it.isEmpty() }
+            .joinToString(separator = "\n", prefix = "\t")
+
+        if (text.isNotEmpty()) {
+            output.get().asFile.writeText("Verify errors:\n$text")
+            logger.lifecycle("Merged output to ${output.get().asFile.absolutePath}")
+        } else {
+            if (output.get().asFile.exists()) {
+                output.get().asFile.delete()
+            }
+        }
+    }
+}
+
+val koverVerifyMergeTask by tasks.registering(KoverVerifyMergeTask::class) {
+    output = rootProject.layout.buildDirectory.file("reports/kover/merge.err")
+}
 
 val coverageExclusions = setOf(
     "benchmarks",
@@ -69,10 +105,21 @@ subprojects {
             kover(project)
         }
 
+        tasks["koverVerify"].finalizedBy(koverVerifyMergeTask)
+
+        koverVerifyMergeTask {
+            tasks.withType(KoverVerifyReport::class).forEach { task ->
+                input.from(
+                    "${task.project.projectDir}/build/reports/kover/verify.err",
+                )
+            }
+
+        }
+
         kover {
             reports {
                 verify {
-                    rule {
+                    rule("Minimal line coverage rate in percents") {
                         minBound(50)
                     }
                 }