[Gradle] suppress DependencySources configurations in tests

PreHmppDependenciesDeprecationIT test checks that all configurations are
resolved without any error. However, *DependencySources configurations
by nature can't be resolved all the time. As not all dependencies have
sources variants published.

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/mpp/PreHmppDependenciesDeprecationIT.kt

@@ -86,6 +86,7 @@ class PreHmppDependenciesDeprecationIT : KGPBaseTest() {
     ) {
         project("preHmppDependenciesDeprecation/$projectName", gradleVersion, localRepoDir = tempDir?.resolve("repo")) {
             preBuildAction()
+            suppressDependencySourcesConfigurations()
             build("$projectPathToCheck:dependencies") {
                 // all dependencies should be resolved, Gradle won't fail the 'dependencies' task on its own
                 assertOutputDoesNotContain("FAILED")

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/testbase/testDsl.kt

@@ -720,3 +720,37 @@ internal fun TestProject.enableStableConfigurationCachePreview() {
             """.trimMargin()
     )
 }
+
+/**
+ * Kotlin Multiplatform Projects have dedicated configurations for source files resolution of all source set dependencies
+ * This helper can be useful for cases when you want to resolve a bunch of configurations and don't want to see any unexpected failures
+ * coming from *DependencySources configurations. Because by nature not every published library has sources variants that can be resolved
+ * via gradle Configurations.
+ */
+internal fun TestProject.suppressDependencySourcesConfigurations() {
+    if (buildGradleKts.exists()) {
+        buildGradleKts.appendText(
+            """
+                allprojects {
+                    configurations.configureEach {
+                        if (name.endsWith("DependencySources") || name.endsWith("dependencySources")) {
+                            incoming.beforeResolve { setExtendsFrom(emptySet()) }                            
+                        }
+                    }            
+                }
+            """.trimIndent()
+        )
+    } else if (buildGradle.exists()) {
+        """
+            allprojects {
+                configurations {
+                    configureEach {
+                        if (name.endsWith("DependencySources") || name.endsWith("dependencySources")) {
+                            incoming.beforeResolve { setExtendsFrom([]) }
+                        }
+                    }
+                }
+            }
+        """.trimIndent()
+    }
+}