Raise test coverage; credit psi coverage from psi-java

.github/workflows/build-on-ubuntu.yml

@@ -12,11 +12,12 @@ jobs:
         with:
           submodules: 'true'
 
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5
         with:
           java-version: 17
           distribution: zulu
-          cache: gradle
+
+      - uses: gradle/actions/setup-gradle@v6
 
       - name: Build project and run tests
         shell: bash

.github/workflows/build-on-windows.yml

@@ -21,20 +21,20 @@ jobs:
           submodules: recursive
           fetch-depth: 0
 
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5
         with:
           java-version: 17
           distribution: zulu
-          cache: gradle
+
+      - uses: gradle/actions/setup-gradle@v6
 
       # See: https://github.com/al-cheb/configure-pagefile-action
       - name: Configure Pagefile
         uses: al-cheb/configure-pagefile-action@v1.3
 
       - name: Build project and run tests
         shell: cmd
-        # For the reason on `--no-daemon` see https://github.com/actions/cache/issues/454
-        run: gradlew.bat build --stacktrace --no-daemon
+        run: gradlew.bat build --stacktrace
 
       # See: https://github.com/marketplace/actions/junit-report-action
       - name: Publish Test Report

.github/workflows/check-links.yml

@@ -33,7 +33,7 @@ jobs:
       cancel-in-progress: true
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # Detect the Hugo site root (`docs/` or `site/`) by looking for a Hugo
       # config file. Hugo config may live directly in the site root or in a

.github/workflows/ensure-reports-updated.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           # Configure the checkout of all branches so that it is possible to run the comparison.
           fetch-depth: 0

.github/workflows/gradle-wrapper-validation.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout latest code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v4

.github/workflows/increment-guard.yml

@@ -14,15 +14,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: 'true'
 
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5
         with:
           java-version: 17
           distribution: zulu
-          cache: gradle
+
+      - uses: gradle/actions/setup-gradle@v6
 
       - name: Check version is not yet published
         shell: bash

.github/workflows/publish.yml

@@ -10,15 +10,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: 'true'
 
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5
         with:
           java-version: 17
           distribution: zulu
-          cache: gradle
+
+      - uses: gradle/actions/setup-gradle@v6
 
       - name: Decrypt CloudRepo credentials
         run: ./config/scripts/decrypt.sh "$CLOUDREPO_CREDENTIALS_KEY" ./.github/keys/cloudrepo.properties.gpg ./cloudrepo.properties

.github/workflows/remove-obsolete-artifacts-from-packages.yaml

@@ -39,7 +39,7 @@ jobs:
     outputs:
       package-names: ${{ steps.request-package-names.outputs.package-names }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           submodules: 'true'
 

buildSrc/src/main/kotlin/config-tester.gradle.kts

@@ -42,10 +42,10 @@ val tempFolder = File("./tmp")
 ConfigTester(config, tasks, tempFolder)
     .addRepo(SpineRepos.baseTypes)  // Builds `base-types` at `master`.
     .addRepo(SpineRepos.base)       // Builds `base` at `master`.
-    .addRepo(SpineRepos.coreJava)   // Builds `core-java` at `master`.
+    .addRepo(SpineRepos.coreJvm)    // Builds `core-jvm` at `master`.
 
     // This is how one builds a specific branch of some repository:
-    // .addRepo(SpineRepos.coreJava, Branch("grpc-concurrency-fixes"))
+    // .addRepo(SpineRepos.coreJvm, Branch("grpc-concurrency-fixes"))
 
     // Register the produced task under the selected name to invoke manually upon need.
     .registerUnder("buildDependants")

buildSrc/src/main/kotlin/io/spine/gradle/ConfigTester.kt

@@ -39,8 +39,8 @@ import org.gradle.api.tasks.TaskContainer
  * A tool to execute the Gradle `build` task in selected Git repositories
  * with the local version of [config] contents.
  *
- * Checks out the content of selected repositories into the specified [tempFolder]. The folder
- * is created if it does not exist. By default, uses `./tmp` as a temp folder.
+ * Checks out the content of selected repositories into the specified [tempFolder].
+ * The folder is created if it does not exist. By default, uses `./tmp` as a temp folder.
  *
  * Replaces the `config` and `buildSrc` folders in the checked out repository by the local versions
  * of code. If the repository-under-test already contains its own `buildSrc` or `config` folders,
@@ -356,7 +356,7 @@ object SpineRepos {
 
     val base: URI = library("base")
     val baseTypes: URI = library("base-types")
-    val coreJava: URI = library("core-java")
+    val coreJvm: URI = library("core-jvm")
     val web: URI = library("web")
 
     private fun library(repo: String) = URI(libsOrg + repo)

buildSrc/src/main/kotlin/io/spine/gradle/report/coverage/SiblingCoverage.kt

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2026, TeamDev. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Redistribution and use in source and/or binary forms, with or without
+ * modification, must retain the above copyright notice and the following
+ * disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.spine.gradle.report.coverage
+
+import kotlinx.kover.gradle.plugin.dsl.KoverProjectExtension
+import org.gradle.api.Project
+import org.gradle.api.Task
+
+/**
+ * Credits the test coverage produced by the [contributor] module for the classes
+ * of this project to this project's own Kover report.
+ *
+ * Some modules' production classes are exercised only by the tests of a sibling
+ * module — for example, the language-neutral `psi` classes are tested through
+ * the Java-PSI fixtures that live in `psi-java`. Kover's per-module report sees
+ * only this module's own `test` execution data, so that cross-module coverage is
+ * otherwise missing from the per-module report (which is what Codecov consumes),
+ * even though the root aggregated report already accounts for it.
+ *
+ * This function adds the [contributor]'s JaCoCo execution data to this project's
+ * `total` report as an additional binary report. Only this project's classes are
+ * credited from it — coverage of unrelated classes in the same execution data is
+ * ignored, because a Kover report is scoped to the owning project's classes. The
+ * report tasks are wired to run after the contributor's `test` task so the data
+ * is present when a report is generated.
+ *
+ * Requires the Kover plugin to be applied to this project.
+ * A cross-project **task** dependency is used, not a project dependency,
+ * so it does not introduce a dependency cycle even when the [contributor]
+ * already depends on this project.
+ */
+fun Project.creditTestCoverageFrom(contributor: Project) {
+    val execFile = contributor.layout.buildDirectory.file(TEST_EXEC_FILE)
+    extensions.configure(KoverProjectExtension::class.java) {
+        reports {
+            total {
+                additionalBinaryReports.add(execFile.map { it.asFile })
+            }
+        }
+    }
+    tasks.matching { it.consumesCoverageBinaryReports() }.configureEach {
+        dependsOn("${contributor.path}:test")
+    }
+}
+
+/**
+ * The Kover/JaCoCo execution-data file produced by a module's `test` task when
+ * the coverage engine is pinned to JaCoCo via `useJacoco(...)`.
+ */
+private const val TEST_EXEC_FILE: String = "kover/bin-reports/test.exec"
+
+/**
+ * Tells whether this is a Kover task that reads the binary reports and therefore
+ * must run only after the [contributor's][creditTestCoverageFrom] test data exists.
+ *
+ * This matches both the report tasks (`koverXmlReport`, `koverHtmlReport`,
+ * `koverBinaryReport`) and the verification tasks (`koverVerify` and its
+ * cacheable companion `koverCachedVerify`) — the suffix test covers the
+ * `Cached*` variants Kover registers, which are the ones that actually consume
+ * the binary reports.
+ */
+private fun Task.consumesCoverageBinaryReports(): Boolean =
+    name.startsWith("kover") && (name.endsWith("Report") || name.endsWith("Verify"))