fix: Do not complete ignored directories

base/src/com/google/idea/blaze/base/lang/buildfile/references/BuildReferenceManager.java

@@ -26,6 +26,7 @@
 import com.google.idea.blaze.base.model.primitives.TargetName;
 import com.google.idea.blaze.base.model.primitives.WorkspacePath;
 import com.google.idea.blaze.base.settings.Blaze;
+import com.google.idea.blaze.base.sync.projectview.ImportRoots;
 import com.google.idea.blaze.base.sync.workspace.WorkspaceHelper;
 import com.google.idea.blaze.base.sync.workspace.WorkspacePathResolver;
 import com.google.idea.blaze.base.sync.workspace.WorkspacePathResolverProvider;
@@ -53,8 +54,13 @@ public static BuildReferenceManager getInstance(Project project) {
 
   private final Project project;
 
+  private IgnoredDirectories ignoredDirectories;
+
   public BuildReferenceManager(Project project) {
     this.project = project;
+    if (ImportRoots.forProjectSafe(project) != null) {
+      this.ignoredDirectories = new IgnoredDirectories(ImportRoots.forProjectSafe(project));
+    }
   }
 
   /** Finds the PSI element associated with the given label. */
@@ -158,6 +164,7 @@ public BuildLookupElement[] resolvePackageLookupElements(FileLookupData lookupDa
     if (vf == null || !vf.isDirectory()) {
       return BuildLookupElement.EMPTY_ARRAY;
     }
+
     BuildLookupElement[] uniqueLookup = new BuildLookupElement[1];
     while (true) {
       VirtualFile[] children = vf.getChildren();
@@ -167,7 +174,9 @@ public BuildLookupElement[] resolvePackageLookupElements(FileLookupData lookupDa
       List<VirtualFile> validChildren = Lists.newArrayListWithCapacity(children.length);
       for (VirtualFile child : children) {
         ProgressManager.checkCanceled();
-        if (child.getName().startsWith(pathFragment) && lookupData.acceptFile(project, child)) {
+        if (child.getName().startsWith(pathFragment)
+            && lookupData.acceptFile(project, child)
+            && (ignoredDirectories == null || !ignoredDirectories.shouldIgnore(child))) {
           validChildren.add(child);
         }
       }
@@ -256,4 +265,21 @@ private File resolveParentDirectory(WorkspacePath packagePath, TargetName target
     String rulePathParent = PathUtil.getParentPath(targetName.toString());
     return new File(packageFile, rulePathParent);
   }
+
+  private class IgnoredDirectories {
+    private ImportRoots importRoots;
+
+    public IgnoredDirectories(ImportRoots importRoots) {
+      this.importRoots = importRoots;
+    }
+
+    public Boolean shouldIgnore(VirtualFile vf) {
+      for (WorkspacePath excludeDirectory : importRoots.excludeDirectories()) {
+        if (vf.getName().startsWith(excludeDirectory.relativePath())) {
+          return true;
+        }
+      }
+      return false;
+    }
+  }
 }

base/src/com/google/idea/blaze/base/lang/buildfile/references/FileLookupData.java

@@ -123,7 +123,7 @@ public static FileLookupData packageLocalFileLookup(
   private final QuoteType quoteType;
   @Nullable private final VirtualFileFilter fileFilter;
 
-  private FileLookupData(
+  protected FileLookupData(
       String originalLabel,
       @Nullable BuildFile containingFile,
       @Nullable String containingPackage,

base/tests/integrationtests/com/google/idea/blaze/base/lang/buildfile/references/BuildReferenceManagerTest.java

@@ -0,0 +1,83 @@
+package com.google.idea.blaze.base.lang.buildfile.references;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.base.Joiner;
+import com.google.idea.blaze.base.MockProjectViewManager;
+import com.google.idea.blaze.base.lang.buildfile.BuildFileIntegrationTestCase;
+import com.google.idea.blaze.base.lang.buildfile.completion.BuildLookupElement;
+import com.google.idea.blaze.base.lang.buildfile.psi.BuildFile;
+import com.google.idea.blaze.base.model.primitives.Label;
+import com.google.idea.blaze.base.model.primitives.WorkspacePath;
+import com.google.idea.blaze.base.projectview.ProjectViewSet;
+import com.google.idea.blaze.base.projectview.parser.ProjectViewParser;
+import com.google.idea.blaze.base.scope.BlazeContext;
+import com.google.idea.blaze.base.sync.workspace.WorkspacePathResolverImpl;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.util.Arrays;
+import java.util.List;
+
+@RunWith(JUnit4.class)
+public class BuildReferenceManagerTest extends BuildFileIntegrationTestCase {
+  private MockProjectViewManager projectViewManager;
+
+  @Test
+  public void testResolvePackageLookupElementsIgnoresIgnoredDirectories() {
+    projectViewManager = new MockProjectViewManager(getProject());
+    setProjectView("directories:", "  .", "derive_targets_from_directories: true");
+
+    workspace.createDirectory(new WorkspacePath(".ijwb"));
+    workspace.createDirectory(new WorkspacePath("src"));
+    workspace.createDirectory(new WorkspacePath("src/go"));
+    workspace.createFile(new WorkspacePath("src/go/BUILD.bazel"), "");
+    workspace.createFile(new WorkspacePath("src/go/main.go"), "package main\n");
+    BuildFile topTelevelBuildFile = createBuildFile(new WorkspacePath("BUILD.bazel"), "");
+
+    BuildReferenceManager manager = new BuildReferenceManager(getProject());
+    FileLookupData nonLocalLookupData =
+        FileLookupData.nonLocalFileLookup(
+            "//", topTelevelBuildFile, QuoteType.NoQuotes, FileLookupData.PathFormat.NonLocal);
+    assertThat(nonLocalLookupData).isNotNull();
+    List<String> results =
+        Arrays.stream(manager.resolvePackageLookupElements(nonLocalLookupData))
+            .map(BuildLookupElement::getLookupString)
+            .toList();
+    assertThat(results).containsAllIn(new String[] {"//src/go"});
+    assertThat(results).containsNoneIn(new String[] {".ijwb"});
+
+    String originalLabel = "//:";
+    Label packageLabel = topTelevelBuildFile.getPackageLabel();
+    assertThat(packageLabel).isNotNull();
+    String basePackagePath = packageLabel.blazePackage().relativePath();
+    String filePath = basePackagePath + "/" + LabelUtils.getRuleComponent(originalLabel);
+    FileLookupData localLookupData =
+        new FileLookupData(
+            originalLabel,
+            topTelevelBuildFile,
+            basePackagePath,
+            filePath,
+            FileLookupData.PathFormat.PackageLocal,
+            QuoteType.NoQuotes,
+            null);
+    List<String> otherResults =
+        Arrays.stream(manager.resolvePackageLookupElements(localLookupData))
+            .map(BuildLookupElement::getLookupString)
+            .toList();
+    assertThat(otherResults).containsAllIn(new String[] {"//:src"});
+    assertThat(otherResults).containsNoneIn(new String[] {":.ijwb"});
+  }
+
+  protected void setProjectView(String... contents) {
+    BlazeContext context = BlazeContext.create();
+    ProjectViewParser projectViewParser =
+        new ProjectViewParser(context, new WorkspacePathResolverImpl(workspaceRoot));
+    projectViewParser.parseProjectView(Joiner.on("\n").join(contents));
+
+    ProjectViewSet result = projectViewParser.getResult();
+    assertThat(result.getProjectViewFiles()).isNotEmpty();
+    projectViewManager.setProjectView(result);
+  }
+}