| 1 | // Package desktoplauncher implements the permanent Reasonix desktop entry |
| 2 | // point. It deliberately owns no crash-loop, rollback, or safe-mode policy. |
| 3 | package desktoplauncher |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "os" |
| 9 | "os/exec" |
| 10 | "path/filepath" |
| 11 | "runtime" |
| 12 | "strings" |
| 13 | |
| 14 | "reasonix/internal/appidentity" |
| 15 | "reasonix/internal/installlayout" |
| 16 | "reasonix/internal/proc" |
| 17 | ) |
| 18 | |
| 19 | // Run resolves the active desktop, performs the one-time legacy handoff when |
| 20 | // needed, and starts the desktop process. |
| 21 | func Run(args []string, buildVersion string) int { |
| 22 | if len(args) > 0 && args[0] == "--repair-shortcuts" { |
| 23 | if err := repairInstallerShortcuts(args[1:], ResolveInstallRoot, appidentity.RepairShortcuts); err != nil { |
| 24 | fmt.Fprintln(os.Stderr, "error: repair Windows shortcut integration:", err) |
| 25 | return 1 |
| 26 | } |
| 27 | return 0 |
| 28 | } |
| 29 | if len(args) == 1 { |
| 30 | switch args[0] { |
| 31 | case "version", "--version", "-v": |
| 32 | fmt.Println("reasonix-launcher", buildVersion) |
| 33 | return 0 |
| 34 | case "help", "--help", "-h": |
| 35 | usage() |
| 36 | return 0 |
| 37 | } |
| 38 | } |
| 39 | if err := appidentity.ApplyToCurrentProcess(); err != nil { |
| 40 | fmt.Fprintln(os.Stderr, "warning: apply Windows app identity:", err) |
| 41 | } |
| 42 | |
| 43 | installRoot, err := ResolveInstallRoot() |
| 44 | if err != nil { |
| 45 | fmt.Fprintln(os.Stderr, "error:", err) |
| 46 | return 1 |
| 47 | } |
| 48 | if err := appidentity.RepairOwnedShortcuts(installRoot); err != nil { |
| 49 | fmt.Fprintln(os.Stderr, "warning: repair Windows shortcut identity:", err) |
| 50 | } |
| 51 | if err := runLegacyMigratorIfNeeded(installRoot); err != nil { |
| 52 | fmt.Fprintln(os.Stderr, "error:", err) |
| 53 | return 1 |
| 54 | } |
| 55 | |
| 56 | desktopPath, err := ResolveDesktopPath(installRoot) |
| 57 | if err != nil { |
| 58 | fmt.Fprintln(os.Stderr, "error:", err) |
| 59 | return 1 |
| 60 | } |
| 61 | |
| 62 | if handled, code := coordinatedLaunch(installRoot, args); handled { |
| 63 | return code |
| 64 | } |
| 65 | |
| 66 | cmd := exec.Command(desktopPath, StripLegacyLaunchArgs(args)...) |
| 67 | proc.HideConsole(cmd) |
| 68 | cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr |
| 69 | cmd.Dir = installRoot |
| 70 | if DetachByDefault() { |
| 71 | if err := cmd.Start(); err != nil { |
| 72 | fmt.Fprintln(os.Stderr, "error:", err) |
| 73 | return 1 |
| 74 | } |
| 75 | return 0 |
| 76 | } |
| 77 | if err := cmd.Run(); err != nil { |
| 78 | var exit *exec.ExitError |
| 79 | if errors.As(err, &exit) { |
| 80 | return exit.ExitCode() |
| 81 | } |
| 82 | fmt.Fprintln(os.Stderr, "error:", err) |
| 83 | return 1 |
| 84 | } |
| 85 | return 0 |
| 86 | } |
| 87 | |
| 88 | // ResolveInstallRoot returns the directory containing the launcher. |
| 89 | func ResolveInstallRoot() (string, error) { |
| 90 | exe, err := os.Executable() |
| 91 | if err != nil { |
| 92 | return "", fmt.Errorf("resolve launcher path: %w", err) |
| 93 | } |
| 94 | return resolveInstallRoot(exe) |
| 95 | } |
| 96 | |
| 97 | func resolveInstallRoot(exe string) (string, error) { |
| 98 | resolved, err := resolveExecutablePath(exe) |
| 99 | if err != nil { |
| 100 | return "", fmt.Errorf("resolve launcher path: %w", err) |
| 101 | } |
| 102 | return filepath.Clean(filepath.Dir(resolved)), nil |
| 103 | } |
| 104 | |
| 105 | // ResolveDesktopPath resolves current.json when present. A present but invalid |
| 106 | // pointer is always fatal; only a genuinely absent pointer may use the flat |
| 107 | // sibling fallback needed by package-managed installs. |
| 108 | func ResolveDesktopPath(installRoot string) (string, error) { |
| 109 | currentPath := filepath.Join(installRoot, installlayout.CurrentFileName) |
| 110 | if _, err := os.Lstat(currentPath); err == nil { |
| 111 | return installlayout.ActiveDesktopPath(installRoot) |
| 112 | } else if !os.IsNotExist(err) { |
| 113 | return "", fmt.Errorf("inspect current.json: %w", err) |
| 114 | } |
| 115 | if path := siblingDesktop(installRoot); path != "" { |
| 116 | return path, nil |
| 117 | } |
| 118 | return "", fmt.Errorf("cannot locate reasonix-desktop under %s (missing current.json)", installRoot) |
| 119 | } |
| 120 | |
| 121 | func runLegacyMigratorIfNeeded(installRoot string) error { |
| 122 | currentPath := filepath.Join(installRoot, installlayout.CurrentFileName) |
| 123 | if _, err := os.Lstat(currentPath); err == nil { |
| 124 | return nil |
| 125 | } else if !os.IsNotExist(err) { |
| 126 | return fmt.Errorf("inspect current.json before migration: %w", err) |
| 127 | } |
| 128 | |
| 129 | migratorName := "reasonix-guard" |
| 130 | if runtime.GOOS == "windows" { |
| 131 | migratorName += ".exe" |
| 132 | } |
| 133 | migratorPath := filepath.Join(installRoot, migratorName) |
| 134 | info, err := os.Lstat(migratorPath) |
| 135 | if os.IsNotExist(err) { |
| 136 | return nil |
| 137 | } |
| 138 | if err != nil { |
| 139 | return fmt.Errorf("inspect legacy migrator: %w", err) |
| 140 | } |
| 141 | if !info.Mode().IsRegular() || info.Mode()&os.ModeSymlink != 0 { |
| 142 | return fmt.Errorf("legacy migrator is not a regular file") |
| 143 | } |
| 144 | |
| 145 | cmd := exec.Command(migratorPath, "--install-root", installRoot, "--no-relaunch") |
| 146 | proc.HideConsole(cmd) |
| 147 | cmd.Dir = installRoot |
| 148 | cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr |
| 149 | if err := cmd.Run(); err != nil { |
| 150 | return fmt.Errorf("legacy layout migration failed: %w", err) |
| 151 | } |
| 152 | if _, err := installlayout.ReadCurrent(installRoot); err != nil { |
| 153 | return fmt.Errorf("legacy layout migration did not commit current.json: %w", err) |
| 154 | } |
| 155 | // The parent launcher owns Windows cleanup after the migrator process exits. |
| 156 | // Unix migrators normally unlink themselves, so NotExist is also success. |
| 157 | if err := os.Remove(migratorPath); err != nil && !os.IsNotExist(err) { |
| 158 | return fmt.Errorf("remove completed legacy migrator: %w", err) |
| 159 | } |
| 160 | return nil |
| 161 | } |
| 162 | |
| 163 | func siblingDesktop(installRoot string) string { |
| 164 | path := filepath.Join(installRoot, installlayout.DesktopBinaryName()) |
| 165 | info, err := os.Lstat(path) |
| 166 | if err != nil || !info.Mode().IsRegular() || info.Mode()&os.ModeSymlink != 0 { |
| 167 | return "" |
| 168 | } |
| 169 | return path |
| 170 | } |
| 171 | |
| 172 | // StripLegacyLaunchArgs removes tokens emitted by old Guard shortcuts. |
| 173 | func StripLegacyLaunchArgs(args []string) []string { |
| 174 | out := make([]string, 0, len(args)) |
| 175 | skipNext := false |
| 176 | for i := range args { |
| 177 | if skipNext { |
| 178 | skipNext = false |
| 179 | continue |
| 180 | } |
| 181 | arg := args[i] |
| 182 | switch arg { |
| 183 | case "launch", "--detach", "--safe-mode", "-safe-mode": |
| 184 | continue |
| 185 | case "--app": |
| 186 | skipNext = true |
| 187 | continue |
| 188 | case "--": |
| 189 | return append(out, args[i:]...) |
| 190 | } |
| 191 | if strings.HasPrefix(arg, "--app=") { |
| 192 | continue |
| 193 | } |
| 194 | out = append(out, arg) |
| 195 | } |
| 196 | return out |
| 197 | } |
| 198 | |
| 199 | // DetachByDefault reports whether the Windows packaged entry should start the |
| 200 | // desktop and exit immediately. |
| 201 | func DetachByDefault() bool { |
| 202 | if runtime.GOOS != "windows" { |
| 203 | return false |
| 204 | } |
| 205 | exe, err := os.Executable() |
| 206 | if err != nil { |
| 207 | return false |
| 208 | } |
| 209 | name := strings.ToLower(filepath.Base(exe)) |
| 210 | return name == "reasonix-launcher.exe" || name == "reasonix.exe" |
| 211 | } |
| 212 | |
| 213 | func usage() { |
| 214 | fmt.Println("usage: reasonix-launcher [args...]") |
| 215 | fmt.Println(" Starts the active Reasonix desktop from current.json.") |
| 216 | fmt.Println(" Legacy --safe-mode / launch --detach tokens are ignored.") |
| 217 | fmt.Println(" --repair-shortcuts <absolute.lnk...> repairs owned installer shortcuts without launching.") |
| 218 | } |
| 219 |