Workaround for a bug in 6.1.x

The bug (#11971) makes the build under test, called by the TAPI,
fail because the working directory is the working directory of
Gradle itself. This causes the test to try to read the verification
metadata file of Gradle itself, which exists, instead of not finding
any verification file like it should, because the build under test
doesn't have any.

The workaround is to change the working directory from the build
under test.

gradle/verification-metadata.xml

@@ -7,6 +7,8 @@
       <verify-signatures>true</verify-signatures>
       <trusted-artifacts>
          <trust group="gradle" name="gradle"/>
+         <!-- TAPI tests use a generated version of the Tooling API -->
+         <trust group="org[.]gradle$" name="gradle-tooling-api$" version=".*[0-9]+[+]0000" regex="true"/>
          <trust group="net[.]rubygrapefruit" name="native-platform.*" version=".*snapshot.*" regex="true"/>
          <trust file=".*-javadoc[.]jar" regex="true"/>
          <trust file=".*-sources[.]jar" regex="true"/>

subprojects/kotlin-dsl-tooling-builders/src/crossVersionTest/groovy/org/gradle/kotlin/dsl/tooling/builders/r60/KotlinDslScriptsModelCrossVersionSpec.groovy

@@ -25,6 +25,7 @@ import org.gradle.test.fixtures.file.LeaksFileHandles
 import org.gradle.test.fixtures.file.TestFile
 import org.gradle.tooling.model.kotlin.dsl.KotlinDslScriptModel
 import org.gradle.tooling.model.kotlin.dsl.KotlinDslScriptsModel
+import org.gradle.util.TextUtil
 
 import java.lang.reflect.Proxy
 
@@ -33,10 +34,22 @@ import static org.hamcrest.CoreMatchers.containsString
 import static org.hamcrest.CoreMatchers.hasItem
 import static org.junit.Assert.assertThat
 
-
 @TargetGradleVersion(">=6.0")
 @LeaksFileHandles("Kotlin Compiler Daemon taking time to shut down")
 class KotlinDslScriptsModelCrossVersionSpec extends AbstractKotlinScriptModelCrossVersionTest {
+    String currentWorkingDir
+
+    def setup() {
+        // we change the working directory because of a bug in 6.1.x where the verification
+        // file is fetched from the working directory instead of the project directory,
+        // which causes the verification file of Gradle itself being used to verify the build
+        // under test
+        currentWorkingDir = System.getProperty("user.dir")
+    }
+
+    def cleanup() {
+        System.setProperty("user.dir", currentWorkingDir)
+    }
 
     def "can fetch model for the scripts of a build"() {
 
@@ -51,6 +64,7 @@ class KotlinDslScriptsModelCrossVersionSpec extends AbstractKotlinScriptModelCro
 
         and:
         assertModelMatchesBuildSpec(model, spec)
+
     }
 
     def "can fetch model for the scripts of a build in lenient mode"() {
@@ -222,6 +236,13 @@ class KotlinDslScriptsModelCrossVersionSpec extends AbstractKotlinScriptModelCro
         def bJar = withEmptyJar("classes_b.jar")
         def precompiledJar = withEmptyJar("classes_b_precompiled.jar")
 
+        def patchBuild = ""
+        def baseVersion = targetDist.version.baseVersion.version
+        if (baseVersion in ["6.1", "6.1.1"]) {
+            // see comment on top of the test class, changing working directory
+            patchBuild = """System.setProperty("user.dir", "${TextUtil.escapeString(temporaryFolder.testDirectory.absolutePath)}")"""
+        }
+
         def some = withFile("some.gradle.kts", """
             buildscript {
                 dependencies {
@@ -235,6 +256,7 @@ class KotlinDslScriptsModelCrossVersionSpec extends AbstractKotlinScriptModelCro
                     classpath(files("${escapeString(settingsJar)}"))
                 }
             }
+            $patchBuild
             apply(from = "some.gradle.kts")
             include("a", "b")
         """)