Rules-based browser launcher for TUI + GNOME.
switchyard.aly.codes
tui
gnome
bowser
go
add abstracted launchCommand for handling xdg vars and flatpak launches
Aly Raffauf
(Jan 16, 2026, 1:23 AM EST)
92c9a2b5
6d9ad475
+59
+59
src/launch.go
+59
src/launch.go
···
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// SPDX-License-Identifier: GPL-3.0-or-later
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package main
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import (
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"os"
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"os/exec"
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"strings"
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"github.com/diamondburned/gotk4/pkg/gdk/v4"
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"github.com/diamondburned/gotk4/pkg/gio/v2"
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)
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// launchCommand executes a desktop file command line with URL substitution
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// and proper activation token handling for window raising on Wayland.
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func launchCommand(cmdline, url string, appInfo *gio.AppInfo) error {
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// Replace %u, %U, %f, %F with URL
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cmdline = strings.ReplaceAll(cmdline, "%u", url)
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cmdline = strings.ReplaceAll(cmdline, "%U", url)
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cmdline = strings.ReplaceAll(cmdline, "%f", url)
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cmdline = strings.ReplaceAll(cmdline, "%F", url)
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// Remove other field codes
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for _, code := range []string{"%i", "%c", "%k"} {
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cmdline = strings.ReplaceAll(cmdline, code, "")
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}
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// Parse the command line
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parts := strings.Fields(cmdline)
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if len(parts) == 0 {
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return nil
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}
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// Get activation token from GDK launch context for window raising on Wayland
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var activationToken string
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if display := gdk.DisplayGetDefault(); display != nil {
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activationToken = display.AppLaunchContext().StartupNotifyID(appInfo, nil)
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}
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// When running in Flatpak, wrap with flatpak-spawn --host
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// and pass activation token via --env flag
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if os.Getenv("FLATPAK_ID") != "" && !strings.HasPrefix(parts[0], "flatpak-spawn") {
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parts = append([]string{"flatpak-spawn", "--host", "--env=XDG_ACTIVATION_TOKEN=" + activationToken}, parts...)
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activationToken = "" // Already handled via flatpak-spawn
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}
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// Execute the command
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cmd := exec.Command(parts[0], parts[1:]...)
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if activationToken != "" {
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cmd.Env = append(os.Environ(), "XDG_ACTIVATION_TOKEN="+activationToken)
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}
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if err := cmd.Start(); err != nil {
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return err
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}
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go cmd.Wait()
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return nil
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}