feat(Analyzer): Support path excludes in findManagedFiles()

If the analyzer is configured to skip excludes, it passes the Excludes
defined in the repository configuration to
PackageManager.findManagedFiles(). That way the analyzer result will
contain only projects that are not matched by a path exclude.

Resolves #5968.

Signed-off-by: Oliver Heger <oliver.heger@bosch.io>

analyzer/src/main/kotlin/Analyzer.kt

@@ -39,6 +39,7 @@ import kotlinx.coroutines.withContext
 import org.apache.logging.log4j.kotlin.Logging
 import org.apache.logging.log4j.kotlin.logger
 
+import org.ossreviewtoolkit.analyzer.PackageManager.Companion.excludes
 import org.ossreviewtoolkit.analyzer.managers.Unmanaged
 import org.ossreviewtoolkit.downloader.VersionControlSystem
 import org.ossreviewtoolkit.model.AnalyzerResult
@@ -89,7 +90,11 @@ class Analyzer(private val config: AnalyzerConfiguration, private val labels: Ma
             // debugging purposes.
             mutableMapOf(distinctPackageManagers.first() to listOf(absoluteProjectPath))
         } else {
-            PackageManager.findManagedFiles(absoluteProjectPath, distinctPackageManagers).toMutableMap()
+            PackageManager.findManagedFiles(
+                absoluteProjectPath,
+                distinctPackageManagers,
+                config.excludes(repositoryConfiguration)
+            ).toMutableMap()
         }
 
         // Associate mapped files by the package manager that manages them.

analyzer/src/test/kotlin/AnalyzerTest.kt

@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2023 The ORT Project Authors (see <https://github.com/oss-review-toolkit/ort/blob/main/NOTICE>)
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * License-Filename: LICENSE
+ */
+
+package org.ossreviewtoolkit.analyzer
+
+import io.kotest.core.spec.style.WordSpec
+import io.kotest.matchers.collections.shouldContainOnly
+import io.kotest.matchers.shouldBe
+
+import io.mockk.every
+import io.mockk.mockkObject
+import io.mockk.unmockkObject
+import io.mockk.verify
+
+import java.io.File
+
+import org.ossreviewtoolkit.analyzer.managers.Maven
+import org.ossreviewtoolkit.model.config.AnalyzerConfiguration
+import org.ossreviewtoolkit.model.config.Excludes
+import org.ossreviewtoolkit.model.config.PathExclude
+import org.ossreviewtoolkit.model.config.PathExcludeReason
+import org.ossreviewtoolkit.model.config.RepositoryConfiguration
+
+class AnalyzerTest : WordSpec({
+    beforeTest {
+        mockkObject(PackageManager)
+        every { PackageManager.ALL } answers { callOriginal() }
+        every { PackageManager.findManagedFiles(rootDir, any(), any()) } returns projectFiles
+    }
+
+    afterTest {
+        unmockkObject(PackageManager)
+    }
+
+    "findManagedFiles" should {
+        "find all managed files" {
+            val analyzer = Analyzer(AnalyzerConfiguration())
+
+            val result = analyzer.findManagedFiles(rootDir, repositoryConfiguration = repositoryConfig)
+
+            checkManagedFileInfo(result)
+
+            verify {
+                PackageManager.findManagedFiles(rootDir, any(), Excludes.EMPTY)
+            }
+        }
+
+        "take excludes into account if configured" {
+            val analyzer = Analyzer(AnalyzerConfiguration(skipExcluded = true))
+
+            val result = analyzer.findManagedFiles(rootDir, repositoryConfiguration = repositoryConfig)
+
+            checkManagedFileInfo(result)
+
+            verify {
+                PackageManager.findManagedFiles(rootDir, any(), repositoryConfig.excludes)
+            }
+        }
+    }
+})
+
+/** The root dir used when searching for definition files. */
+private val rootDir = File("projectRoot").absoluteFile
+
+/**
+ * A default [RepositoryConfiguration] that also defines some [Excludes]. This is used to test whether [Excludes] are
+ * correctly propagated to the [PackageManager].
+ */
+private val repositoryConfig = RepositoryConfiguration(
+    excludes = Excludes(
+        paths = listOf(PathExclude("**/src/test/**", PathExcludeReason.TEST_OF))
+    )
+)
+
+/**
+ * A [PackageManagerFactory] used as key in the default result for [PackageManager.findManagedFiles].
+ */
+private val factory: PackageManagerFactory = Maven.Factory()
+
+/**
+ * A default result to be returned from [PackageManager.findManagedFiles].
+ */
+private val projectFiles: ManagedProjectFiles =
+    mapOf(factory to listOf(File("pom.xml"), File("sub/pom.xml")))
+
+/**
+ * Return a [Map] with the names of the [PackageManager]s contained in this map as keys to simplify access.
+ */
+private fun Map<PackageManager, List<File>>.byName(): Map<String, List<File>> = mapKeys { e -> e.key.managerName }
+
+/**
+ * Check whether the given [info] contains the expected information.
+ */
+private fun checkManagedFileInfo(info: Analyzer.ManagedFileInfo) {
+    with(info) {
+        absoluteProjectPath shouldBe rootDir
+        repositoryConfiguration shouldBe repositoryConfig
+        val managedFilesByName = managedFiles.byName()
+        managedFilesByName.keys shouldContainOnly listOf("Maven")
+        managedFilesByName.getValue("Maven") shouldBe projectFiles[factory]
+    }
+}