Fix Test Optimization init when repo root cannot be determined

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/CiVisibilityRepoServices.java

@@ -39,6 +39,7 @@
 import java.nio.file.Paths;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
+import javax.annotation.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -47,7 +48,7 @@ public class CiVisibilityRepoServices {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(CiVisibilityRepoServices.class);
 
-  final String repoRoot;
+  @Nullable final String repoRoot;
   final String moduleName;
   final Provider ciProvider;
   final Map<String, String> ciTags;
@@ -135,7 +136,7 @@ private static String appendSlashIfNeeded(String repoRoot) {
     }
   }
 
-  static String getModuleName(Config config, String repoRoot, Path path) {
+  static String getModuleName(Config config, @Nullable String repoRoot, Path path) {
     // if parent process is instrumented, it will provide build system's module name
     String parentModuleName = config.getCiVisibilityModuleName();
     if (parentModuleName != null) {
@@ -175,7 +176,7 @@ private static ExecutionSettingsFactory buildExecutionSettingsFactory(
       GitRepoUnshallow gitRepoUnshallow,
       GitDataUploader gitDataUploader,
       PullRequestInfo pullRequestInfo,
-      String repoRoot) {
+      @Nullable String repoRoot) {
     ConfigurationApi configurationApi;
     if (backendApi == null) {
       LOGGER.warn(
@@ -208,7 +209,7 @@ private static GitDataUploader buildGitDataUploader(
       GitClient gitClient,
       GitRepoUnshallow gitRepoUnshallow,
       BackendApi backendApi,
-      String repoRoot) {
+      @Nullable String repoRoot) {
     if (!config.isCiVisibilityGitUploadEnabled()) {
       return () -> CompletableFuture.completedFuture(null);
     }
@@ -239,7 +240,7 @@ private static GitDataUploader buildGitDataUploader(
   }
 
   private static SourcePathResolver buildSourcePathResolver(
-      String repoRoot, RepoIndexProvider indexProvider) {
+      @Nullable String repoRoot, RepoIndexProvider indexProvider) {
     SourcePathResolver compilerAidedResolver =
         repoRoot != null
             ? new CompilerAidedSourcePathResolver(repoRoot)
@@ -248,7 +249,7 @@ private static SourcePathResolver buildSourcePathResolver(
     return new BestEffortSourcePathResolver(compilerAidedResolver, indexResolver);
   }
 
-  private static Codeowners buildCodeowners(String repoRoot) {
+  private static Codeowners buildCodeowners(@Nullable String repoRoot) {
     if (repoRoot != null) {
       return new CodeownersProvider().build(repoRoot);
     } else {

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/config/ExecutionSettingsFactoryImpl.java

@@ -54,7 +54,7 @@ public class ExecutionSettingsFactoryImpl implements ExecutionSettingsFactory {
   private final GitRepoUnshallow gitRepoUnshallow;
   private final GitDataUploader gitDataUploader;
   private final PullRequestInfo pullRequestInfo;
-  private final String repositoryRoot;
+  @Nullable private final String repositoryRoot;
 
   public ExecutionSettingsFactoryImpl(
       Config config,
@@ -63,7 +63,7 @@ public ExecutionSettingsFactoryImpl(
       GitRepoUnshallow gitRepoUnshallow,
       GitDataUploader gitDataUploader,
       PullRequestInfo pullRequestInfo,
-      String repositoryRoot) {
+      @Nullable String repositoryRoot) {
     this.config = config;
     this.configurationApi = configurationApi;
     this.gitClient = gitClient;
@@ -75,21 +75,19 @@ public ExecutionSettingsFactoryImpl(
 
   /** @return Executions settings by module name */
   public Map<String, ExecutionSettings> create(@Nonnull JvmInfo jvmInfo) {
-    TracerEnvironment tracerEnvironment = buildTracerEnvironment(repositoryRoot, jvmInfo, null);
+    TracerEnvironment tracerEnvironment = buildTracerEnvironment(jvmInfo, null);
     return create(tracerEnvironment);
   }
 
   @Override
   public ExecutionSettings create(@Nonnull JvmInfo jvmInfo, @Nullable String moduleName) {
-    TracerEnvironment tracerEnvironment =
-        buildTracerEnvironment(repositoryRoot, jvmInfo, moduleName);
+    TracerEnvironment tracerEnvironment = buildTracerEnvironment(jvmInfo, moduleName);
     Map<String, ExecutionSettings> settingsByModule = create(tracerEnvironment);
     ExecutionSettings settings = settingsByModule.get(moduleName);
     return settings != null ? settings : settingsByModule.get(DEFAULT_SETTINGS);
   }
 
-  private TracerEnvironment buildTracerEnvironment(
-      String repositoryRoot, JvmInfo jvmInfo, @Nullable String moduleName) {
+  private TracerEnvironment buildTracerEnvironment(JvmInfo jvmInfo, @Nullable String moduleName) {
     GitInfo gitInfo = GitInfoProvider.INSTANCE.getGitInfo(repositoryRoot);
 
     TracerEnvironment.Builder builder = TracerEnvironment.builder();

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/coverage/percentage/JacocoCoverageCalculator.java

@@ -19,6 +19,7 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.Reader;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.BitSet;
@@ -42,6 +43,7 @@
 import org.jacoco.core.data.SessionInfoStore;
 import org.jacoco.report.FileMultiReportOutput;
 import org.jacoco.report.IReportVisitor;
+import org.jacoco.report.ISourceFileLocator;
 import org.jacoco.report.InputStreamSourceFileLocator;
 import org.jacoco.report.html.HTMLFormatter;
 import org.jacoco.report.xml.XMLFormatter;
@@ -55,13 +57,13 @@ public static final class Factory
       implements CoverageCalculator.Factory<JacocoCoverageCalculator> {
     private final Config config;
     private final RepoIndexProvider repoIndexProvider;
-    private final String repoRoot;
+    @Nullable private final String repoRoot;
     private final ModuleSignalRouter moduleSignalRouter;
 
     public Factory(
         Config config,
         RepoIndexProvider repoIndexProvider,
-        String repoRoot,
+        @Nullable String repoRoot,
         ModuleSignalRouter moduleSignalRouter) {
       this.config = config;
       this.repoIndexProvider = repoIndexProvider;
@@ -100,7 +102,7 @@ public JacocoCoverageCalculator moduleCoverage(
 
   private final RepoIndexProvider repoIndexProvider;
 
-  private final String repoRoot;
+  @Nullable private final String repoRoot;
 
   private final long eventId;
 
@@ -116,7 +118,10 @@ public JacocoCoverageCalculator moduleCoverage(
   private final Collection<File> outputClassesDirs = new HashSet<>();
 
   private JacocoCoverageCalculator(
-      Config config, RepoIndexProvider repoIndexProvider, String repoRoot, long sessionId) {
+      Config config,
+      RepoIndexProvider repoIndexProvider,
+      @Nullable String repoRoot,
+      long sessionId) {
     this.parent = null;
     this.config = config;
     this.repoIndexProvider = repoIndexProvider;
@@ -128,7 +133,7 @@ private JacocoCoverageCalculator(
       Config config,
       RepoIndexProvider repoIndexProvider,
       ExecutionSettings executionSettings,
-      String repoRoot,
+      @Nullable String repoRoot,
       long moduleId,
       @Nullable BuildModuleLayout moduleLayout,
       ModuleSignalRouter moduleSignalRouter,
@@ -297,29 +302,33 @@ private void dumpCoverageReport(IBundleCoverage coverageBundle, File reportFolde
       final IReportVisitor htmlVisitor =
           htmlFormatter.createVisitor(new FileMultiReportOutput(reportFolder));
       htmlVisitor.visitInfo(Collections.emptyList(), Collections.emptyList());
-      htmlVisitor.visitBundle(
-          coverageBundle, new RepoIndexFileLocator(repoIndexProvider.getIndex(), repoRoot));
+      htmlVisitor.visitBundle(coverageBundle, createSourceFileLocator());
       htmlVisitor.visitEnd();
 
       File xmlReport = new File(reportFolder, "jacoco.xml");
       try (FileOutputStream xmlReportStream = new FileOutputStream(xmlReport)) {
         XMLFormatter xmlFormatter = new XMLFormatter();
         IReportVisitor xmlVisitor = xmlFormatter.createVisitor(xmlReportStream);
         xmlVisitor.visitInfo(Collections.emptyList(), Collections.emptyList());
-        xmlVisitor.visitBundle(
-            coverageBundle, new RepoIndexFileLocator(repoIndexProvider.getIndex(), repoRoot));
+        xmlVisitor.visitBundle(coverageBundle, createSourceFileLocator());
         xmlVisitor.visitEnd();
       }
     } catch (Exception e) {
       LOGGER.error("Error while creating report in {}", reportFolder, e);
     }
   }
 
+  private ISourceFileLocator createSourceFileLocator() {
+    return repoRoot != null
+        ? new RepoIndexFileLocator(repoIndexProvider.getIndex(), repoRoot)
+        : NoOpFileLocator.INSTANCE;
+  }
+
   private static final class RepoIndexFileLocator extends InputStreamSourceFileLocator {
     private final RepoIndex repoIndex;
-    private final String repoRoot;
+    @Nonnull private final String repoRoot;
 
-    private RepoIndexFileLocator(RepoIndex repoIndex, String repoRoot) {
+    private RepoIndexFileLocator(RepoIndex repoIndex, @Nonnull String repoRoot) {
       super("utf-8", 4);
       this.repoIndex = repoIndex;
       this.repoRoot = repoRoot;
@@ -343,6 +352,22 @@ protected InputStream getSourceStream(String path) throws IOException {
     }
   }
 
+  private static final class NoOpFileLocator implements ISourceFileLocator {
+    private static final NoOpFileLocator INSTANCE = new NoOpFileLocator();
+
+    private NoOpFileLocator() {}
+
+    @Override
+    public Reader getSourceFile(String s, String s1) {
+      return null;
+    }
+
+    @Override
+    public int getTabWidth() {
+      return 0;
+    }
+  }
+
   private long getCoveragePercentage(IBundleCoverage coverageBundle) {
     if (backendCoverageData.isEmpty()) {
       return getLocalCoveragePercentage(coverageBundle);

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/events/NoOpTestEventsHandler.java

@@ -15,7 +15,6 @@
 import java.util.Collection;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
-import org.jetbrains.annotations.NotNull;
 
 public class NoOpTestEventsHandler<SuiteKey, TestKey>
     implements TestEventsHandler<SuiteKey, TestKey> {
@@ -99,7 +98,7 @@ public SkipReason skipReason(TestIdentifier test) {
     return null;
   }
 
-  @NotNull
+  @Nonnull
   @Override
   public TestExecutionPolicy executionPolicy(
       TestIdentifier test, TestSourceData source, Collection<String> testTags) {

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/git/tree/GitClient.java

@@ -77,6 +77,6 @@ LineDiff getGitDiff(String baseCommit, String targetCommit)
       throws IOException, TimeoutException, InterruptedException;
 
   interface Factory {
-    GitClient create(String repoRoot);
+    GitClient create(@Nullable String repoRoot);
   }
 }

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/git/tree/NoOpGitClient.java

@@ -5,8 +5,8 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 public class NoOpGitClient implements GitClient {
 
@@ -54,7 +54,7 @@ public String getCurrentBranch() {
     return null;
   }
 
-  @NotNull
+  @Nonnull
   @Override
   public List<String> getTags(String commit) {
     return Collections.emptyList();
@@ -108,13 +108,13 @@ public String getCommitterDate(String commit) {
     return null;
   }
 
-  @NotNull
+  @Nonnull
   @Override
   public List<String> getLatestCommits() {
     return Collections.emptyList();
   }
 
-  @NotNull
+  @Nonnull
   @Override
   public List<String> getObjects(
       Collection<String> commitsToSkip, Collection<String> commitsToInclude) {

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/git/tree/ShellGitClient.java

@@ -51,7 +51,7 @@ public class ShellGitClient implements GitClient {
    */
   ShellGitClient(
       CiVisibilityMetricCollector metricCollector,
-      String repoRoot,
+      @Nonnull String repoRoot,
       String latestCommitsSince,
       int latestCommitsLimit,
       long timeoutMillis) {
@@ -651,10 +651,15 @@ public Factory(Config config, CiVisibilityMetricCollector metricCollector) {
     }
 
     @Override
-    public GitClient create(String repoRoot) {
+    public GitClient create(@Nullable String repoRoot) {
       long commandTimeoutMillis = config.getCiVisibilityGitCommandTimeoutMillis();
-      return new ShellGitClient(
-          metricCollector, repoRoot, "1 month ago", 1000, commandTimeoutMillis);
+      if (repoRoot != null) {
+        return new ShellGitClient(
+            metricCollector, repoRoot, "1 month ago", 1000, commandTimeoutMillis);
+      } else {
+        LOGGER.debug("Could not determine repository root, using no-op git client");
+        return NoOpGitClient.INSTANCE;
+      }
     }
   }
 }

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/source/index/CachingRepoIndexBuilderFactory.java

@@ -4,6 +4,7 @@
 import datadog.trace.api.cache.DDCache;
 import datadog.trace.api.cache.DDCaches;
 import java.nio.file.FileSystem;
+import javax.annotation.Nullable;
 
 public class CachingRepoIndexBuilderFactory implements RepoIndexProvider.Factory {
 
@@ -25,7 +26,7 @@ public CachingRepoIndexBuilderFactory(
   }
 
   @Override
-  public RepoIndexProvider create(String repoRoot) {
+  public RepoIndexProvider create(@Nullable String repoRoot) {
     if (repoRoot == null) {
       return () -> RepoIndex.EMPTY;
     }

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/source/index/RepoIndexBuilder.java

@@ -19,6 +19,7 @@
 import java.util.HashSet;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
+import javax.annotation.Nonnull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -37,7 +38,7 @@ public class RepoIndexBuilder implements RepoIndexProvider {
 
   public RepoIndexBuilder(
       Config config,
-      String repoRoot,
+      @Nonnull String repoRoot,
       PackageResolver packageResolver,
       ResourceResolver resourceResolver,
       FileSystem fileSystem) {

dd-java-agent/agent-ci-visibility/src/main/java/datadog/trace/civisibility/source/index/RepoIndexProvider.java

@@ -1,9 +1,11 @@
 package datadog.trace.civisibility.source.index;
 
+import javax.annotation.Nullable;
+
 public interface RepoIndexProvider {
   RepoIndex getIndex();
 
   interface Factory {
-    RepoIndexProvider create(String repoRoot);
+    RepoIndexProvider create(@Nullable String repoRoot);
   }
 }