fix(worktree): resolve worktrees by name from git registry (#921)

cmd/bd/worktree_cmd.go

@@ -523,6 +523,24 @@ func resolveWorktreePath(repoRoot, name string) (string, error) {
 		return repoPath, nil
 	}
 
+	// Consult git's worktree registry - match by name (basename) or path
+	// This handles worktrees created in subdirectories (e.g., .worktrees/foo)
+	// where the name shown in "bd worktree list" doesn't match a simple path
+	// #nosec G204 - repoRoot comes from git.GetRepoRoot()
+	gitCmd := exec.Command("git", "worktree", "list", "--porcelain")
+	gitCmd.Dir = repoRoot
+	output, err := gitCmd.CombinedOutput()
+	if err == nil {
+		worktrees := parseWorktreeList(string(output))
+		for _, wt := range worktrees {
+			if wt.Name == name || wt.Path == name {
+				if _, err := os.Stat(wt.Path); err == nil {
+					return wt.Path, nil
+				}
+			}
+		}
+	}
+
 	return "", fmt.Errorf("worktree not found: %s", name)
 }
 

cmd/bd/worktree_test.go

@@ -1,6 +1,9 @@
 package main
 
 import (
+	"os"
+	"os/exec"
+	"path/filepath"
 	"testing"
 )
 
@@ -63,3 +66,103 @@ func TestGitRevParse(t *testing.T) {
 		t.Logf("Not in git repo or error")
 	}
 }
+
+// TestResolveWorktreePathByName verifies that resolveWorktreePath can find
+// worktrees by name (basename) when they're in subdirectories like .worktrees/
+func TestResolveWorktreePathByName(t *testing.T) {
+	// Create a temp directory for the main repo
+	mainDir := t.TempDir()
+
+	// Initialize git repo
+	cmd := exec.Command("git", "init", "--initial-branch=main")
+	cmd.Dir = mainDir
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("Failed to init git repo: %v\n%s", err, output)
+	}
+
+	// Configure git user
+	cmd = exec.Command("git", "config", "user.email", "test@test.com")
+	cmd.Dir = mainDir
+	_ = cmd.Run()
+	cmd = exec.Command("git", "config", "user.name", "Test User")
+	cmd.Dir = mainDir
+	_ = cmd.Run()
+
+	// Create initial commit (required for worktrees)
+	if err := os.WriteFile(filepath.Join(mainDir, "README.md"), []byte("# Test\n"), 0644); err != nil {
+		t.Fatalf("Failed to create test file: %v", err)
+	}
+	cmd = exec.Command("git", "add", ".")
+	cmd.Dir = mainDir
+	_ = cmd.Run()
+	cmd = exec.Command("git", "commit", "-m", "Initial commit")
+	cmd.Dir = mainDir
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("Failed to create initial commit: %v\n%s", err, output)
+	}
+
+	// Create .worktrees subdirectory
+	worktreesDir := filepath.Join(mainDir, ".worktrees")
+	if err := os.MkdirAll(worktreesDir, 0755); err != nil {
+		t.Fatalf("Failed to create .worktrees dir: %v", err)
+	}
+
+	// Create a worktree inside .worktrees/
+	worktreePath := filepath.Join(worktreesDir, "test-wt")
+	cmd = exec.Command("git", "worktree", "add", "-b", "test-wt", worktreePath)
+	cmd.Dir = mainDir
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("Failed to create worktree: %v\n%s", err, output)
+	}
+	defer func() {
+		// Cleanup worktree
+		cmd := exec.Command("git", "worktree", "remove", worktreePath, "--force")
+		cmd.Dir = mainDir
+		_ = cmd.Run()
+	}()
+
+	t.Run("resolves by name when worktree is in subdirectory", func(t *testing.T) {
+		// This should find the worktree by consulting git's registry
+		resolved, err := resolveWorktreePath(mainDir, "test-wt")
+		if err != nil {
+			t.Errorf("resolveWorktreePath(repoRoot, \"test-wt\") failed: %v", err)
+			return
+		}
+		// Compare resolved paths to handle symlinks (e.g., /var -> /private/var on macOS)
+		wantResolved, _ := filepath.EvalSymlinks(worktreePath)
+		gotResolved, _ := filepath.EvalSymlinks(resolved)
+		if gotResolved != wantResolved {
+			t.Errorf("resolveWorktreePath returned %q, want %q", resolved, worktreePath)
+		}
+	})
+
+	t.Run("resolves by relative path", func(t *testing.T) {
+		// This should work via the existing relative-to-repo-root logic
+		resolved, err := resolveWorktreePath(mainDir, ".worktrees/test-wt")
+		if err != nil {
+			t.Errorf("resolveWorktreePath(repoRoot, \".worktrees/test-wt\") failed: %v", err)
+			return
+		}
+		if resolved != worktreePath {
+			t.Errorf("resolveWorktreePath returned %q, want %q", resolved, worktreePath)
+		}
+	})
+
+	t.Run("resolves by absolute path", func(t *testing.T) {
+		resolved, err := resolveWorktreePath(mainDir, worktreePath)
+		if err != nil {
+			t.Errorf("resolveWorktreePath(repoRoot, absolutePath) failed: %v", err)
+			return
+		}
+		if resolved != worktreePath {
+			t.Errorf("resolveWorktreePath returned %q, want %q", resolved, worktreePath)
+		}
+	})
+
+	t.Run("returns error for non-existent worktree", func(t *testing.T) {
+		_, err := resolveWorktreePath(mainDir, "non-existent")
+		if err == nil {
+			t.Error("resolveWorktreePath should return error for non-existent worktree")
+		}
+	})
+}