build: remove Kover coverage plugin

Reverts the Kover coverage aggregation (introduced in dca345212b) from every
module, the root aggregation block, the Sonar coverage import, the version
catalog, and BUILDING.md. With the plugin present the 16 GB CI runner OOM-killed
during the Android test+build job even with Kover opt-in disabled; removing it
entirely clears the OOM. No other CI changes — the diff versus main is exactly
the inverse of dca345212b.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

BUILDING.md

@@ -278,25 +278,6 @@ call does not guarantee lint finishes first):
 The reports persist under each module's `build/reports/`, so re-run lint only
 when you want fresh lint data in the next scan.
 
-### 5. Optional: include test coverage
-
-Coverage comes from [Kover](https://github.com/Kotlin/kotlinx-kover). The root
-`koverXmlReportCoverage` task runs the unit-test suites of the covered modules
-(`quartz`, `commons`, `quic`, `nestsClient`, `geode`, `cli`, `relayBench`,
-`desktopApp`, and `amethyst`'s `fdroidDebug` variant) and merges the result
-into `build/reports/kover/reportCoverage.xml`, which the scanner imports
-automatically when it exists. Same recipe as lint — generate first, scan
-second:
-
-```bash
-./gradlew koverXmlReportCoverage
-./gradlew sonar
-```
-
-For a human-readable version of the same data, run
-`./gradlew koverHtmlReportCoverage` and open
-`build/reports/kover/htmlCoverage/index.html`.
-
 Every `sonar.*` entry in `local.properties` is forwarded to the scanner, so any
 [analysis parameter](https://docs.sonarsource.com/sonarqube-server/latest/analyzing-source-code/analysis-parameters/)
 can be set there. `sonar.projectKey` / `sonar.projectName` default to the root

amethyst/build.gradle.kts

@@ -6,7 +6,6 @@ plugins {
     alias(libs.plugins.jetbrainsComposeCompiler)
     alias(libs.plugins.serialization)
     alias(libs.plugins.googleKsp)
-    alias(libs.plugins.kotlinxKover)
 }
 
 fun getCurrentBranch(workingDir: java.io.File): String =

build.gradle.kts

@@ -45,50 +45,6 @@ plugins {
     alias(libs.plugins.androidKotlinMultiplatformLibrary) apply false
     alias(libs.plugins.serialization)
     alias(libs.plugins.googleKsp) apply false
-    alias(libs.plugins.kotlinxKover)
-}
-
-// Aggregated code coverage: `./gradlew koverXmlReportCoverage` runs the unit
-// test suites of the modules below and merges their coverage into
-// build/reports/kover/reportCoverage.xml (JaCoCo-compatible XML, importable by
-// SonarQube — see BUILDING.md). `koverHtmlReportCoverage` renders the same
-// data for humans. A named variant is used instead of Kover's default total
-// report because the total for an Android project unconditionally merges
-// EVERY build variant — compiling all release/benchmark variants of
-// :amethyst just to measure unit tests. The "coverage" variant below picks
-// one representative compilation per project: the `jvm` target for KMP/JVM
-// modules and `playDebug` for :amethyst — play is the primary flavor and the
-// larger code surface (both `add`s are optional so the one block fits every
-// project). :nappletHost stays out — it has no tests.
-dependencies {
-    kover(project(":amethyst"))
-    kover(project(":quartz"))
-    kover(project(":commons"))
-    kover(project(":quic"))
-    kover(project(":nestsClient"))
-    kover(project(":geode"))
-    kover(project(":cli"))
-    kover(project(":relayBench"))
-    kover(project(":desktopApp"))
-}
-
-kover {
-    currentProject {
-        createVariant("coverage") {}
-    }
-}
-
-subprojects {
-    plugins.withId("org.jetbrains.kotlinx.kover") {
-        configure<kotlinx.kover.gradle.plugin.dsl.KoverProjectExtension> {
-            currentProject {
-                createVariant("coverage") {
-                    add("jvm", optional = true)
-                    add("playDebug", optional = true)
-                }
-            }
-        }
-    }
 }
 
 // Shared app version for all subprojects — read from gradle/libs.versions.toml.
@@ -164,15 +120,6 @@ if (sonarEnabled) {
         .filter { it.startsWith("sonar.") }
         .forEach { System.setProperty(it, sonarProperties.getProperty(it)) }
 
-    // Import Kover's aggregated coverage (run `./gradlew koverXmlReportCoverage`
-    // first) unless the operator pointed the scanner somewhere else.
-    if (System.getProperty("sonar.coverage.jacoco.xmlReportPaths") == null) {
-        System.setProperty(
-            "sonar.coverage.jacoco.xmlReportPaths",
-            layout.buildDirectory.file("reports/kover/reportCoverage.xml").get().asFile.absolutePath,
-        )
-    }
-
     // The scanner's sonarResolver task reads AGP's generated-res-values provider
     // but doesn't depend on the task that produces it — wire it up in every
     // module that has both (today only :amethyst enables resValues, but the

cli/build.gradle.kts

@@ -3,7 +3,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 plugins {
     alias(libs.plugins.jetbrainsKotlinJvm)
     application
-    alias(libs.plugins.kotlinxKover)
 }
 
 kotlin {

commons/build.gradle.kts

@@ -25,7 +25,6 @@ plugins {
     alias(libs.plugins.jetbrainsComposeCompiler)
     alias(libs.plugins.composeMultiplatform)
     alias(libs.plugins.serialization)
-    alias(libs.plugins.kotlinxKover)
 }
 
 kotlin {

desktopApp/build.gradle.kts

@@ -6,7 +6,6 @@ plugins {
     alias(libs.plugins.jetbrainsKotlinJvm)
     alias(libs.plugins.composeMultiplatform)
     alias(libs.plugins.jetbrainsComposeCompiler)
-    alias(libs.plugins.kotlinxKover)
 }
 
 // RPM rejects dashes in version strings — replace with tilde (~) which RPM uses

geode/build.gradle.kts

@@ -5,7 +5,6 @@ plugins {
     alias(libs.plugins.serialization)
     application
     `java-test-fixtures`
-    alias(libs.plugins.kotlinxKover)
 }
 
 application {

gradle/libs.versions.toml

@@ -35,7 +35,6 @@ kmpTorResource = "409.5.0"
 junit = "4.13.2"
 kchesslib = "1.0.5"
 kotlin = "2.4.0"
-kover = "0.9.8"
 kotlinxCollectionsImmutable = "0.5.0"
 kotlinxCoroutinesCore = "1.11.0"
 kotlinxSerialization = "1.11.0"
@@ -247,7 +246,6 @@ jetbrainsKotlinJvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
 jetbrainsComposeCompiler = { id = "org.jetbrains.kotlin.plugin.compose", version.ref = "kotlin" }
 serialization = { id = 'org.jetbrains.kotlin.plugin.serialization', version.ref = 'kotlin' }
 kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
-kotlinxKover = { id = "org.jetbrains.kotlinx.kover", version.ref = "kover" }
 androidKotlinMultiplatformLibrary = { id = "com.android.kotlin.multiplatform.library", version.ref = "agp" }
 vanniktech-mavenPublish = { id = "com.vanniktech.maven.publish", version.ref = "mavenPublish" }
 composeMultiplatform = { id = "org.jetbrains.compose", version.ref = "composeMultiplatform" }

nestsClient/build.gradle.kts

@@ -5,7 +5,6 @@ plugins {
     alias(libs.plugins.kotlinMultiplatform)
     alias(libs.plugins.androidKotlinMultiplatformLibrary)
     alias(libs.plugins.serialization)
-    alias(libs.plugins.kotlinxKover)
 }
 
 kotlin {

quartz/build.gradle.kts

@@ -9,7 +9,6 @@ plugins {
     alias(libs.plugins.androidKotlinMultiplatformLibrary)
     alias(libs.plugins.serialization)
     alias(libs.plugins.vanniktech.mavenPublish)
-    alias(libs.plugins.kotlinxKover)
 }
 
 kotlin {

quic/build.gradle.kts

@@ -23,7 +23,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 plugins {
     alias(libs.plugins.kotlinMultiplatform)
     alias(libs.plugins.androidKotlinMultiplatformLibrary)
-    alias(libs.plugins.kotlinxKover)
 }
 
 kotlin {

relayBench/build.gradle.kts

@@ -3,7 +3,6 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 plugins {
     alias(libs.plugins.jetbrainsKotlinJvm)
     application
-    alias(libs.plugins.kotlinxKover)
 }
 
 application {