fix gui

gui/reveal.go

@@ -0,0 +1,65 @@
+package gui
+
+import (
+	"context"
+	"log/slog"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"time"
+)
+
+// revealTimeout bounds the helper process. A missing or wedged file manager
+// must not leave a goroutine parked forever.
+const revealTimeout = 10 * time.Second
+
+// RevealInFileManager opens the platform file manager with path selected,
+// falling back to opening its containing directory.
+//
+// Writing a log file and only printing where it went is not much use to someone
+// who is about to attach it to a bug report, so the export shows it instead of
+// describing it.
+//
+// It blocks; callers should run it off the UI goroutine.
+func RevealInFileManager(path string, logger *slog.Logger) error {
+	if logger == nil {
+		logger = slog.Default()
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), revealTimeout)
+	defer cancel()
+
+	abs, err := filepath.Abs(path)
+	if err != nil {
+		abs = path
+	}
+
+	switch runtime.GOOS {
+	case "darwin":
+		// -R reveals rather than opens, so Finder highlights the file.
+		return exec.CommandContext(ctx, "open", "-R", abs).Run()
+
+	case "windows":
+		// explorer wants the comma glued to the flag, and exits non-zero even
+		// when it succeeds, so its status is deliberately ignored.
+		_ = exec.CommandContext(ctx, "explorer", "/select,"+abs).Run()
+		return nil
+
+	default:
+		// The freedesktop interface highlights the file; every major Linux file
+		// manager implements it. Fall back to opening the directory when the
+		// service is absent — dbus-send itself may not even be installed.
+		uri := "file://" + abs
+		dbus := exec.CommandContext(ctx, "dbus-send",
+			"--session", "--dest=org.freedesktop.FileManager1", "--type=method_call",
+			"/org/freedesktop/FileManager1", "org.freedesktop.FileManager1.ShowItems",
+			"array:string:"+uri, "string:tslink",
+		)
+		if err := dbus.Run(); err == nil {
+			return nil
+		} else {
+			logger.Debug("FileManager1.ShowItems unavailable, opening the directory",
+				"err", err)
+		}
+		return exec.CommandContext(ctx, "xdg-open", filepath.Dir(abs)).Run()
+	}
+}