[Gradle] do not import buildSrc project if it was included into the main build IDEA-228368

GitOrigin-RevId: e5a8c55d51e7fa8727b11b5b3c715c600f05dfa6

plugins/gradle/java/testSources/importing/GradleBuildSrcImportingTest.kt

@@ -1,6 +1,7 @@
 // Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package org.jetbrains.plugins.gradle.importing
 
+import org.jetbrains.plugins.gradle.tooling.annotation.TargetVersions
 import org.junit.Test
 
 class GradleBuildSrcImportingTest : GradleImportingTestCase() {
@@ -21,4 +22,20 @@ class GradleBuildSrcImportingTest : GradleImportingTestCase() {
     assertModules("project", "project.main", "project.test",
                   "project.buildSrc", "project.buildSrc.main", "project.buildSrc.test")
   }
+
+  @TargetVersions("<6.0") // since 6.9 'buildSrc' is a reserved project name, https://docs.gradle.org/current/userguide/upgrading_version_5.html#buildsrc_is_now_reserved_as_a_project_and_subproject_build_name
+  @Test
+  fun `test buildSrc project is included into the main build`() {
+    createProjectSubFile("buildSrc/src/main/java/my/pack/Util.java",
+                         "package my.pack;\npublic class Util {}")
+
+    importProject("apply plugin: 'java'")
+    assertModules("project", "project.main", "project.test",
+                  "project.buildSrc", "project.buildSrc.main", "project.buildSrc.test")
+
+    createSettingsFile("include 'buildSrc'")
+    importProject("apply plugin: 'java'")
+    assertModules("project", "project.main", "project.test", "project.buildSrc")
+
+  }
 }

plugins/gradle/src/org/jetbrains/plugins/gradle/service/project/GradleBuildSrcProjectsResolver.java

@@ -170,6 +170,11 @@ public class GradleBuildSrcProjectsResolver {
       return;
     }
 
+    if (includedModulesPaths.containsKey(projectPath)) {
+      // `buildSrc` has been already included into the main build (prohibited since 6.0, https://docs.gradle.org/current/userguide/upgrading_version_5.html#buildsrc_is_now_reserved_as_a_project_and_subproject_build_name)
+      return;
+    }
+
     if (ArrayUtil.isEmpty(projectPathFile.list((dir, name) -> !name.equals(".gradle") && !name.equals("build")))) {
       return;
     }

plugins/gradle/tooling-extension-api/src/org/jetbrains/plugins/gradle/tooling/util/VersionMatcher.java

@@ -35,7 +35,7 @@ public class VersionMatcher {
   }
 
   public boolean isVersionMatch(@Nullable TargetVersions targetVersions) {
-    if (targetVersions == null || targetVersions.value() == null || targetVersions.value().isEmpty()) return true;
+    if (targetVersions == null || targetVersions.value().isEmpty()) return true;
 
     final GradleVersion current = adjust(myGradleVersion, targetVersions.checkBaseVersions());
 
@@ -43,6 +43,16 @@ public class VersionMatcher {
       String minVersion = targetVersions.value().substring(0, targetVersions.value().length() - 1);
       return compare(current, minVersion, targetVersions.checkBaseVersions()) >= 0;
     }
+    else if (targetVersions.value().startsWith("<")) {
+      if (targetVersions.value().startsWith("<=")) {
+        String maxVersion = targetVersions.value().substring(2);
+        return compare(current, maxVersion, targetVersions.checkBaseVersions()) <= 0;
+      }
+      else {
+        String maxVersion = targetVersions.value().substring(1);
+        return compare(current, maxVersion, targetVersions.checkBaseVersions()) < 0;
+      }
+    }
     else {
       final int rangeIndex = targetVersions.value().indexOf(RANGE_TOKEN);
       if (rangeIndex != -1) {