| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "crypto/rand" |
| 5 | "encoding/base64" |
| 6 | "encoding/hex" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "io" |
| 10 | "os" |
| 11 | "os/exec" |
| 12 | "path/filepath" |
| 13 | "runtime" |
| 14 | "strings" |
| 15 | "sync" |
| 16 | "time" |
| 17 | |
| 18 | "reasonix/internal/config" |
| 19 | "reasonix/internal/localeenv" |
| 20 | "reasonix/internal/secrets" |
| 21 | ) |
| 22 | |
| 23 | const ( |
| 24 | terminalOutputChannel = "terminal:output" |
| 25 | terminalExitChannel = "terminal:exit" |
| 26 | maxTerminalsPerWorkspace = 10 |
| 27 | terminalCloseWait = 2 * time.Second |
| 28 | defaultTerminalColumns = 80 |
| 29 | defaultTerminalRows = 24 |
| 30 | maxTerminalColumns = 1000 |
| 31 | maxTerminalRows = 500 |
| 32 | maxTerminalSnapshotBytes = 128 * 1024 |
| 33 | ) |
| 34 | |
| 35 | var ( |
| 36 | errTerminalStaleTab = errors.New("terminal request is no longer for the active tab") |
| 37 | errTerminalRemote = errors.New("integrated terminal is unavailable for remote workspaces") |
| 38 | errTerminalOutside = errors.New("terminal directory is outside the workspace") |
| 39 | errTerminalManagerOff = errors.New("terminal manager is not available") |
| 40 | ) |
| 41 | |
| 42 | // TerminalSessionView is the renderer-safe snapshot of an interactive shell. |
| 43 | type TerminalSessionView struct { |
| 44 | ID string `json:"id"` |
| 45 | Title string `json:"title"` |
| 46 | Shell string `json:"shell"` |
| 47 | Cwd string `json:"cwd"` |
| 48 | CreatedAt int64 `json:"createdAt"` |
| 49 | ExitCode *int `json:"exitCode,omitempty"` |
| 50 | Running bool `json:"running"` |
| 51 | } |
| 52 | |
| 53 | // TerminalShellView is a backend-approved shell choice. The renderer sends the |
| 54 | // stable ID back; it never sends an executable path. |
| 55 | type TerminalShellView struct { |
| 56 | ID string `json:"id"` |
| 57 | Label string `json:"label"` |
| 58 | } |
| 59 | |
| 60 | // TerminalWorkspaceView describes terminal capability for the active tab. All |
| 61 | // slices are initialized so the desktop bridge encodes empty values as [] rather than null. |
| 62 | type TerminalWorkspaceView struct { |
| 63 | Available bool `json:"available"` |
| 64 | ReadOnly bool `json:"readOnly"` |
| 65 | Reason string `json:"reason,omitempty"` |
| 66 | Sessions []TerminalSessionView `json:"sessions"` |
| 67 | Shells []TerminalShellView `json:"shells"` |
| 68 | } |
| 69 | |
| 70 | type terminalTarget struct { |
| 71 | tabID string |
| 72 | workspaceRoot string |
| 73 | workspaceKey string |
| 74 | readOnly bool |
| 75 | } |
| 76 | |
| 77 | type terminalCommand struct { |
| 78 | path string |
| 79 | args []string |
| 80 | label string |
| 81 | } |
| 82 | |
| 83 | type terminalStartSpec struct { |
| 84 | command terminalCommand |
| 85 | dir string |
| 86 | env []string |
| 87 | cols int |
| 88 | rows int |
| 89 | } |
| 90 | |
| 91 | type terminalProcess interface { |
| 92 | io.ReadWriteCloser |
| 93 | Resize(cols, rows int) error |
| 94 | Wait() (int, error) |
| 95 | } |
| 96 | |
| 97 | type terminalSession struct { |
| 98 | view TerminalSessionView |
| 99 | tabID string |
| 100 | workspaceKey string |
| 101 | process terminalProcess |
| 102 | readDone chan struct{} |
| 103 | done chan struct{} |
| 104 | output []byte |
| 105 | } |
| 106 | |
| 107 | type terminalManager struct { |
| 108 | app *App |
| 109 | |
| 110 | mu sync.Mutex |
| 111 | sessions map[string]*terminalSession |
| 112 | byWorkspace map[string][]string |
| 113 | starting map[string]int |
| 114 | tabGeneration map[string]uint64 |
| 115 | closedTabIDs map[string]struct{} |
| 116 | closed bool |
| 117 | start func(terminalStartSpec) (terminalProcess, error) |
| 118 | } |
| 119 | |
| 120 | func newTerminalManager(app *App) *terminalManager { |
| 121 | return &terminalManager{ |
| 122 | app: app, |
| 123 | sessions: make(map[string]*terminalSession), |
| 124 | byWorkspace: make(map[string][]string), |
| 125 | starting: make(map[string]int), |
| 126 | tabGeneration: make(map[string]uint64), |
| 127 | closedTabIDs: make(map[string]struct{}), |
| 128 | start: startTerminalProcess, |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | func emptyTerminalWorkspaceView() TerminalWorkspaceView { |
| 133 | return TerminalWorkspaceView{ |
| 134 | Sessions: []TerminalSessionView{}, |
| 135 | Shells: []TerminalShellView{}, |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | // TerminalWorkspaceForTab returns the terminal state for the currently active |
| 140 | // tab. The backend owns workspace resolution; renderer-supplied filesystem roots |
| 141 | // are never accepted. |
| 142 | func (a *App) TerminalWorkspaceForTab(tabID string) (TerminalWorkspaceView, error) { |
| 143 | view := emptyTerminalWorkspaceView() |
| 144 | target, err := a.terminalTargetForTab(tabID, false) |
| 145 | if err != nil { |
| 146 | if errors.Is(err, errTerminalRemote) { |
| 147 | view.Reason = err.Error() |
| 148 | return view, nil |
| 149 | } |
| 150 | return view, err |
| 151 | } |
| 152 | view.ReadOnly = target.readOnly |
| 153 | available, reason := terminalPlatformAvailable() |
| 154 | view.Available = available |
| 155 | view.Reason = reason |
| 156 | view.Shells = terminalShellOptions() |
| 157 | if a.terminals != nil { |
| 158 | view.Sessions = a.terminals.list(target.workspaceKey) |
| 159 | } |
| 160 | return view, nil |
| 161 | } |
| 162 | |
| 163 | // TerminalOutputForTab returns a bounded snapshot of the selected session's |
| 164 | // output. It is an explicit user action for adding terminal context to chat; |
| 165 | // terminal output is never injected into provider prompts automatically. |
| 166 | func (a *App) TerminalOutputForTab(tabID, sessionID string) (string, error) { |
| 167 | target, err := a.terminalTargetForTab(tabID, false) |
| 168 | if err != nil { |
| 169 | return "", err |
| 170 | } |
| 171 | if a.terminals == nil { |
| 172 | return "", errTerminalManagerOff |
| 173 | } |
| 174 | return a.terminals.snapshot(target.workspaceKey, sessionID), nil |
| 175 | } |
| 176 | |
| 177 | // CreateTerminalForTab starts an interactive shell at a workspace-relative |
| 178 | // file or directory. Files resolve to their parent directory after an os.Stat; |
| 179 | // symlinked directories are checked against the canonical workspace root. |
| 180 | func (a *App) CreateTerminalForTab(tabID, rel, shellID string) (TerminalSessionView, error) { |
| 181 | target, err := a.terminalTargetForTab(tabID, true) |
| 182 | if err != nil { |
| 183 | return TerminalSessionView{}, err |
| 184 | } |
| 185 | releaseAdmission, err := a.beginWorkspaceRuntimeAdmission(target.workspaceRoot) |
| 186 | if err != nil { |
| 187 | return TerminalSessionView{}, err |
| 188 | } |
| 189 | defer releaseAdmission() |
| 190 | available, reason := terminalPlatformAvailable() |
| 191 | if !available { |
| 192 | return TerminalSessionView{}, errors.New(reason) |
| 193 | } |
| 194 | dir, err := resolveTerminalStartDir(target.workspaceRoot, rel) |
| 195 | if err != nil { |
| 196 | return TerminalSessionView{}, err |
| 197 | } |
| 198 | command, err := resolveTerminalCommand(target.workspaceRoot, shellID) |
| 199 | if err != nil { |
| 200 | return TerminalSessionView{}, err |
| 201 | } |
| 202 | if err := a.revalidateTerminalTarget(target, true); err != nil { |
| 203 | return TerminalSessionView{}, err |
| 204 | } |
| 205 | if a.terminals == nil { |
| 206 | return TerminalSessionView{}, errTerminalManagerOff |
| 207 | } |
| 208 | return a.terminals.create(target.tabID, target.workspaceKey, dir, command) |
| 209 | } |
| 210 | |
| 211 | func (a *App) ResizeTerminalForTab(tabID, sessionID string, cols, rows int) error { |
| 212 | target, err := a.terminalTargetForTab(tabID, true) |
| 213 | if err != nil { |
| 214 | return err |
| 215 | } |
| 216 | if a.terminals == nil { |
| 217 | return errTerminalManagerOff |
| 218 | } |
| 219 | return a.terminals.resize(target.workspaceKey, sessionID, cols, rows) |
| 220 | } |
| 221 | |
| 222 | func (a *App) CloseTerminalForTab(tabID, sessionID string) error { |
| 223 | target, err := a.terminalTargetForTab(tabID, true) |
| 224 | if err != nil { |
| 225 | return err |
| 226 | } |
| 227 | if a.terminals == nil { |
| 228 | return errTerminalManagerOff |
| 229 | } |
| 230 | return a.terminals.closeTerminal(target.workspaceKey, sessionID) |
| 231 | } |
| 232 | |
| 233 | func (a *App) RenameTerminalForTab(tabID, sessionID, title string) error { |
| 234 | target, err := a.terminalTargetForTab(tabID, true) |
| 235 | if err != nil { |
| 236 | return err |
| 237 | } |
| 238 | if a.terminals == nil { |
| 239 | return errTerminalManagerOff |
| 240 | } |
| 241 | return a.terminals.rename(target.workspaceKey, sessionID, title) |
| 242 | } |
| 243 | |
| 244 | func (a *App) terminalTargetForTab(tabID string, requireWritable bool) (terminalTarget, error) { |
| 245 | tabID = strings.TrimSpace(tabID) |
| 246 | a.mu.RLock() |
| 247 | activeID := a.activeTabID |
| 248 | if tabID == "" { |
| 249 | tabID = activeID |
| 250 | } |
| 251 | if tabID == "" || tabID != activeID { |
| 252 | a.mu.RUnlock() |
| 253 | return terminalTarget{}, errTerminalStaleTab |
| 254 | } |
| 255 | tab := a.tabByIDLocked(tabID) |
| 256 | if tab == nil { |
| 257 | a.mu.RUnlock() |
| 258 | return terminalTarget{}, errTerminalStaleTab |
| 259 | } |
| 260 | root := tab.WorkspaceRoot |
| 261 | readOnly := terminalReadOnlyForTab(tab) |
| 262 | a.mu.RUnlock() |
| 263 | |
| 264 | if requireWritable && readOnly { |
| 265 | return terminalTarget{}, readOnlyChannelErr() |
| 266 | } |
| 267 | base, err := workspaceBaseFromRoot(root) |
| 268 | if err != nil { |
| 269 | return terminalTarget{}, err |
| 270 | } |
| 271 | base, err = canonicalDirectory(base) |
| 272 | if err != nil { |
| 273 | return terminalTarget{}, fmt.Errorf("resolve terminal workspace: %w", err) |
| 274 | } |
| 275 | return terminalTarget{ |
| 276 | tabID: tabID, |
| 277 | workspaceRoot: base, |
| 278 | workspaceKey: tabID + "\x00" + filepath.Clean(base), |
| 279 | readOnly: readOnly, |
| 280 | }, nil |
| 281 | } |
| 282 | |
| 283 | func (a *App) revalidateTerminalTarget(target terminalTarget, requireWritable bool) error { |
| 284 | a.mu.RLock() |
| 285 | tab := a.tabByIDLocked(target.tabID) |
| 286 | valid := tab != nil && a.activeTabID == target.tabID |
| 287 | readOnly := valid && terminalReadOnlyForTab(tab) |
| 288 | root := "" |
| 289 | if valid { |
| 290 | root = tab.WorkspaceRoot |
| 291 | } |
| 292 | a.mu.RUnlock() |
| 293 | if !valid { |
| 294 | return errTerminalStaleTab |
| 295 | } |
| 296 | if requireWritable && readOnly { |
| 297 | return readOnlyChannelErr() |
| 298 | } |
| 299 | base, err := workspaceBaseFromRoot(root) |
| 300 | if err != nil { |
| 301 | return err |
| 302 | } |
| 303 | base, err = canonicalDirectory(base) |
| 304 | if err != nil || filepath.Clean(base) != target.workspaceRoot { |
| 305 | return errTerminalStaleTab |
| 306 | } |
| 307 | return nil |
| 308 | } |
| 309 | |
| 310 | func canonicalDirectory(path string) (string, error) { |
| 311 | abs, err := filepath.Abs(path) |
| 312 | if err != nil { |
| 313 | return "", err |
| 314 | } |
| 315 | real, err := filepath.EvalSymlinks(abs) |
| 316 | if err != nil { |
| 317 | return "", err |
| 318 | } |
| 319 | info, err := os.Stat(real) |
| 320 | if err != nil { |
| 321 | return "", err |
| 322 | } |
| 323 | if !info.IsDir() { |
| 324 | return "", fmt.Errorf("%s is not a directory", real) |
| 325 | } |
| 326 | return filepath.Clean(real), nil |
| 327 | } |
| 328 | |
| 329 | func resolveTerminalStartDir(workspaceRoot, rel string) (string, error) { |
| 330 | workspaceRoot, err := canonicalDirectory(workspaceRoot) |
| 331 | if err != nil { |
| 332 | return "", err |
| 333 | } |
| 334 | rel = strings.TrimSpace(rel) |
| 335 | if rel == "" { |
| 336 | rel = "." |
| 337 | } |
| 338 | if filepath.IsAbs(rel) { |
| 339 | return "", errTerminalOutside |
| 340 | } |
| 341 | target, ok, err := workspacePathForBase(workspaceRoot, rel) |
| 342 | if err != nil || !ok { |
| 343 | return "", errTerminalOutside |
| 344 | } |
| 345 | info, err := os.Stat(target) |
| 346 | if err != nil { |
| 347 | return "", fmt.Errorf("resolve terminal directory: %w", err) |
| 348 | } |
| 349 | if !info.IsDir() { |
| 350 | target = filepath.Dir(target) |
| 351 | } |
| 352 | target, err = canonicalDirectory(target) |
| 353 | if err != nil { |
| 354 | return "", err |
| 355 | } |
| 356 | relToRoot, err := filepath.Rel(workspaceRoot, target) |
| 357 | if err != nil || relToRoot == ".." || strings.HasPrefix(relToRoot, ".."+string(os.PathSeparator)) { |
| 358 | return "", errTerminalOutside |
| 359 | } |
| 360 | return target, nil |
| 361 | } |
| 362 | |
| 363 | func terminalShellOptions() []TerminalShellView { |
| 364 | options := []TerminalShellView{{ID: "default", Label: "Default shell"}} |
| 365 | seen := map[string]bool{"default": true} |
| 366 | add := func(id, label, binary string) { |
| 367 | if seen[id] { |
| 368 | return |
| 369 | } |
| 370 | if _, err := exec.LookPath(binary); err == nil { |
| 371 | seen[id] = true |
| 372 | options = append(options, TerminalShellView{ID: id, Label: label}) |
| 373 | } |
| 374 | } |
| 375 | if runtime.GOOS == "windows" { |
| 376 | add("powershell", "PowerShell", "pwsh.exe") |
| 377 | add("windows-powershell", "Windows PowerShell", "powershell.exe") |
| 378 | add("cmd", "Command Prompt", "cmd.exe") |
| 379 | add("bash", "Bash", "bash.exe") |
| 380 | return options |
| 381 | } |
| 382 | add("zsh", "zsh", "zsh") |
| 383 | add("bash", "bash", "bash") |
| 384 | add("fish", "fish", "fish") |
| 385 | add("sh", "sh", "sh") |
| 386 | return options |
| 387 | } |
| 388 | |
| 389 | func resolveTerminalCommand(_ string, shellID string) (terminalCommand, error) { |
| 390 | shellID = strings.ToLower(strings.TrimSpace(shellID)) |
| 391 | if shellID == "" || shellID == "auto" { |
| 392 | shellID = "default" |
| 393 | } |
| 394 | if shellID == "default" { |
| 395 | if cfg, err := config.LoadUserConfigReadOnly(); err == nil { |
| 396 | if command, ok := terminalCommandFromConfig(cfg.Tools.Shell.Prefer, cfg.Tools.Shell.Path); ok { |
| 397 | return command, nil |
| 398 | } |
| 399 | } |
| 400 | return defaultTerminalCommand() |
| 401 | } |
| 402 | return namedTerminalCommand(shellID) |
| 403 | } |
| 404 | |
| 405 | func defaultTerminalCommand() (terminalCommand, error) { |
| 406 | if runtime.GOOS != "windows" { |
| 407 | if path := strings.TrimSpace(os.Getenv("SHELL")); path != "" { |
| 408 | if resolved, err := exec.LookPath(path); err == nil { |
| 409 | return commandForShellPath(resolved, filepath.Base(resolved)), nil |
| 410 | } |
| 411 | } |
| 412 | for _, id := range []string{"zsh", "bash", "fish", "sh"} { |
| 413 | if command, err := namedTerminalCommand(id); err == nil { |
| 414 | return command, nil |
| 415 | } |
| 416 | } |
| 417 | return terminalCommand{}, errors.New("no interactive shell was found") |
| 418 | } |
| 419 | for _, id := range []string{"powershell", "windows-powershell", "cmd", "bash"} { |
| 420 | if command, err := namedTerminalCommand(id); err == nil { |
| 421 | return command, nil |
| 422 | } |
| 423 | } |
| 424 | return terminalCommand{}, errors.New("no interactive shell was found") |
| 425 | } |
| 426 | |
| 427 | func namedTerminalCommand(shellID string) (terminalCommand, error) { |
| 428 | var binary, label string |
| 429 | switch shellID { |
| 430 | case "bash": |
| 431 | binary, label = "bash", "bash" |
| 432 | case "zsh": |
| 433 | binary, label = "zsh", "zsh" |
| 434 | case "fish": |
| 435 | binary, label = "fish", "fish" |
| 436 | case "sh": |
| 437 | binary, label = "sh", "sh" |
| 438 | case "powershell", "pwsh": |
| 439 | binary, label = "pwsh", "PowerShell" |
| 440 | if runtime.GOOS == "windows" { |
| 441 | binary = "pwsh.exe" |
| 442 | } |
| 443 | case "windows-powershell": |
| 444 | binary, label = "powershell.exe", "Windows PowerShell" |
| 445 | case "cmd": |
| 446 | binary, label = "cmd.exe", "Command Prompt" |
| 447 | default: |
| 448 | return terminalCommand{}, fmt.Errorf("unsupported terminal shell %q", shellID) |
| 449 | } |
| 450 | path, err := exec.LookPath(binary) |
| 451 | if err != nil { |
| 452 | return terminalCommand{}, fmt.Errorf("terminal shell %q is not installed", shellID) |
| 453 | } |
| 454 | return commandForShellPath(path, label), nil |
| 455 | } |
| 456 | |
| 457 | func commandForShellPath(path, label string) terminalCommand { |
| 458 | base := strings.ToLower(strings.TrimSuffix(filepath.Base(path), filepath.Ext(path))) |
| 459 | args := []string{} |
| 460 | switch base { |
| 461 | case "bash", "zsh", "sh", "ksh", "fish": |
| 462 | args = []string{"-l"} |
| 463 | case "pwsh", "powershell": |
| 464 | args = []string{"-NoLogo"} |
| 465 | case "cmd": |
| 466 | args = []string{"/Q"} |
| 467 | } |
| 468 | return terminalCommand{path: path, args: args, label: label} |
| 469 | } |
| 470 | |
| 471 | func terminalEnvironment(base []string) []string { |
| 472 | base = localeenv.DefaultUTF8(base) |
| 473 | env := make([]string, 0, len(base)+2) |
| 474 | for _, item := range base { |
| 475 | key, _, ok := strings.Cut(item, "=") |
| 476 | if ok && (strings.EqualFold(key, "TERM") || strings.EqualFold(key, "COLORTERM")) { |
| 477 | continue |
| 478 | } |
| 479 | env = append(env, item) |
| 480 | } |
| 481 | return append(env, "TERM=xterm-256color", "COLORTERM=truecolor") |
| 482 | } |
| 483 | |
| 484 | func (m *terminalManager) create(tabID, workspaceKey, dir string, command terminalCommand) (TerminalSessionView, error) { |
| 485 | tabID = strings.TrimSpace(tabID) |
| 486 | m.mu.Lock() |
| 487 | if m.closed { |
| 488 | m.mu.Unlock() |
| 489 | return TerminalSessionView{}, errTerminalManagerOff |
| 490 | } |
| 491 | if tabID == "" { |
| 492 | m.mu.Unlock() |
| 493 | return TerminalSessionView{}, errTerminalStaleTab |
| 494 | } |
| 495 | if _, closed := m.closedTabIDs[tabID]; closed { |
| 496 | m.mu.Unlock() |
| 497 | return TerminalSessionView{}, errTerminalStaleTab |
| 498 | } |
| 499 | generation := m.tabGeneration[tabID] |
| 500 | if len(m.byWorkspace[workspaceKey])+m.starting[workspaceKey] >= maxTerminalsPerWorkspace { |
| 501 | m.mu.Unlock() |
| 502 | return TerminalSessionView{}, fmt.Errorf("terminal session limit reached (%d)", maxTerminalsPerWorkspace) |
| 503 | } |
| 504 | m.starting[workspaceKey]++ |
| 505 | m.mu.Unlock() |
| 506 | |
| 507 | defer func() { |
| 508 | m.mu.Lock() |
| 509 | m.starting[workspaceKey]-- |
| 510 | if m.starting[workspaceKey] == 0 { |
| 511 | delete(m.starting, workspaceKey) |
| 512 | } |
| 513 | m.mu.Unlock() |
| 514 | }() |
| 515 | |
| 516 | id, err := newTerminalID() |
| 517 | if err != nil { |
| 518 | return TerminalSessionView{}, err |
| 519 | } |
| 520 | proc, err := m.start(terminalStartSpec{ |
| 521 | command: command, |
| 522 | dir: dir, |
| 523 | env: terminalEnvironment(secrets.ProcessEnv()), |
| 524 | cols: defaultTerminalColumns, |
| 525 | rows: defaultTerminalRows, |
| 526 | }) |
| 527 | if err != nil { |
| 528 | return TerminalSessionView{}, fmt.Errorf("start terminal: %w", err) |
| 529 | } |
| 530 | |
| 531 | session := &terminalSession{ |
| 532 | view: TerminalSessionView{ |
| 533 | ID: id, |
| 534 | Title: command.label, |
| 535 | Shell: command.label, |
| 536 | Cwd: dir, |
| 537 | CreatedAt: time.Now().UnixMilli(), |
| 538 | Running: true, |
| 539 | }, |
| 540 | tabID: tabID, |
| 541 | workspaceKey: workspaceKey, |
| 542 | process: proc, |
| 543 | readDone: make(chan struct{}), |
| 544 | done: make(chan struct{}), |
| 545 | } |
| 546 | |
| 547 | m.mu.Lock() |
| 548 | if m.closed { |
| 549 | m.mu.Unlock() |
| 550 | _ = proc.Close() |
| 551 | return TerminalSessionView{}, errTerminalManagerOff |
| 552 | } |
| 553 | if _, closed := m.closedTabIDs[tabID]; closed { |
| 554 | m.mu.Unlock() |
| 555 | _ = proc.Close() |
| 556 | return TerminalSessionView{}, errTerminalStaleTab |
| 557 | } |
| 558 | if m.tabGeneration[tabID] != generation { |
| 559 | m.mu.Unlock() |
| 560 | _ = proc.Close() |
| 561 | return TerminalSessionView{}, errTerminalStaleTab |
| 562 | } |
| 563 | m.sessions[id] = session |
| 564 | m.byWorkspace[workspaceKey] = append(m.byWorkspace[workspaceKey], id) |
| 565 | view := session.view |
| 566 | m.mu.Unlock() |
| 567 | |
| 568 | go m.readLoop(session) |
| 569 | go m.waitLoop(session) |
| 570 | return view, nil |
| 571 | } |
| 572 | |
| 573 | func (m *terminalManager) snapshot(workspaceKey, sessionID string) string { |
| 574 | m.mu.Lock() |
| 575 | defer m.mu.Unlock() |
| 576 | session := m.sessions[strings.TrimSpace(sessionID)] |
| 577 | if session == nil || session.workspaceKey != workspaceKey { |
| 578 | return "" |
| 579 | } |
| 580 | return string(session.output) |
| 581 | } |
| 582 | |
| 583 | func appendTerminalSnapshot(current, data []byte) []byte { |
| 584 | if len(data) >= maxTerminalSnapshotBytes { |
| 585 | return append([]byte(nil), data[len(data)-maxTerminalSnapshotBytes:]...) |
| 586 | } |
| 587 | if over := len(current) + len(data) - maxTerminalSnapshotBytes; over > 0 { |
| 588 | if over >= len(current) { |
| 589 | current = current[:0] |
| 590 | } else { |
| 591 | current = append([]byte(nil), current[over:]...) |
| 592 | } |
| 593 | } |
| 594 | return append(current, data...) |
| 595 | } |
| 596 | |
| 597 | func (m *terminalManager) list(workspaceKey string) []TerminalSessionView { |
| 598 | m.mu.Lock() |
| 599 | defer m.mu.Unlock() |
| 600 | ids := m.byWorkspace[workspaceKey] |
| 601 | out := make([]TerminalSessionView, 0, len(ids)) |
| 602 | for _, id := range ids { |
| 603 | if session := m.sessions[id]; session != nil { |
| 604 | out = append(out, session.view) |
| 605 | } |
| 606 | } |
| 607 | return out |
| 608 | } |
| 609 | |
| 610 | func (m *terminalManager) sessionLocked(workspaceKey, sessionID string) (*terminalSession, error) { |
| 611 | session := m.sessions[strings.TrimSpace(sessionID)] |
| 612 | if session == nil || session.workspaceKey != workspaceKey { |
| 613 | return nil, errors.New("terminal session not found in the active workspace") |
| 614 | } |
| 615 | return session, nil |
| 616 | } |
| 617 | |
| 618 | func (m *terminalManager) write(workspaceKey, sessionID string, data []byte) error { |
| 619 | m.mu.Lock() |
| 620 | session, err := m.sessionLocked(workspaceKey, sessionID) |
| 621 | if err == nil && !session.view.Running { |
| 622 | err = errors.New("terminal session has exited") |
| 623 | } |
| 624 | var proc terminalProcess |
| 625 | if err == nil { |
| 626 | proc = session.process |
| 627 | } |
| 628 | m.mu.Unlock() |
| 629 | if err != nil { |
| 630 | return err |
| 631 | } |
| 632 | _, err = proc.Write(data) |
| 633 | return err |
| 634 | } |
| 635 | |
| 636 | func (m *terminalManager) resize(workspaceKey, sessionID string, cols, rows int) error { |
| 637 | if cols <= 0 || rows <= 0 { |
| 638 | return nil |
| 639 | } |
| 640 | if cols > maxTerminalColumns { |
| 641 | cols = maxTerminalColumns |
| 642 | } |
| 643 | if rows > maxTerminalRows { |
| 644 | rows = maxTerminalRows |
| 645 | } |
| 646 | m.mu.Lock() |
| 647 | session, err := m.sessionLocked(workspaceKey, sessionID) |
| 648 | var proc terminalProcess |
| 649 | if err == nil && session.view.Running { |
| 650 | proc = session.process |
| 651 | } |
| 652 | m.mu.Unlock() |
| 653 | if err != nil || proc == nil { |
| 654 | return err |
| 655 | } |
| 656 | return proc.Resize(cols, rows) |
| 657 | } |
| 658 | |
| 659 | func (m *terminalManager) rename(workspaceKey, sessionID, title string) error { |
| 660 | title = strings.TrimSpace(title) |
| 661 | if title == "" { |
| 662 | return errors.New("terminal title is required") |
| 663 | } |
| 664 | if len([]rune(title)) > 80 { |
| 665 | return errors.New("terminal title is too long") |
| 666 | } |
| 667 | m.mu.Lock() |
| 668 | defer m.mu.Unlock() |
| 669 | session, err := m.sessionLocked(workspaceKey, sessionID) |
| 670 | if err != nil { |
| 671 | return err |
| 672 | } |
| 673 | session.view.Title = title |
| 674 | return nil |
| 675 | } |
| 676 | |
| 677 | func (m *terminalManager) closeTerminal(workspaceKey, sessionID string) error { |
| 678 | m.mu.Lock() |
| 679 | session, err := m.sessionLocked(workspaceKey, sessionID) |
| 680 | if err != nil { |
| 681 | m.mu.Unlock() |
| 682 | return err |
| 683 | } |
| 684 | m.removeSessionLocked(session) |
| 685 | m.mu.Unlock() |
| 686 | |
| 687 | _ = session.process.Close() |
| 688 | select { |
| 689 | case <-session.done: |
| 690 | case <-time.After(terminalCloseWait): |
| 691 | } |
| 692 | return nil |
| 693 | } |
| 694 | |
| 695 | func (m *terminalManager) closeForTab(tabID string) { |
| 696 | m.closeSessions(m.detachForTab(tabID)) |
| 697 | } |
| 698 | |
| 699 | // detachForTab closes the creation gate and removes every registered session |
| 700 | // without waiting on process I/O. Callers can use it while serializing an App |
| 701 | // capability transition, then close the returned processes after releasing |
| 702 | // App.mu. |
| 703 | func (m *terminalManager) detachForTab(tabID string) []*terminalSession { |
| 704 | if m == nil { |
| 705 | return nil |
| 706 | } |
| 707 | tabID = strings.TrimSpace(tabID) |
| 708 | if tabID == "" { |
| 709 | return nil |
| 710 | } |
| 711 | m.mu.Lock() |
| 712 | m.closedTabIDs[tabID] = struct{}{} |
| 713 | m.tabGeneration[tabID]++ |
| 714 | sessions := make([]*terminalSession, 0) |
| 715 | for _, session := range m.sessions { |
| 716 | if session.tabID != tabID { |
| 717 | continue |
| 718 | } |
| 719 | m.removeSessionLocked(session) |
| 720 | sessions = append(sessions, session) |
| 721 | } |
| 722 | m.mu.Unlock() |
| 723 | return sessions |
| 724 | } |
| 725 | |
| 726 | func (m *terminalManager) closeSessions(sessions []*terminalSession) { |
| 727 | if m == nil || len(sessions) == 0 { |
| 728 | return |
| 729 | } |
| 730 | for _, session := range sessions { |
| 731 | _ = session.process.Close() |
| 732 | } |
| 733 | deadline := time.NewTimer(terminalCloseWait) |
| 734 | defer deadline.Stop() |
| 735 | for _, session := range sessions { |
| 736 | select { |
| 737 | case <-session.done: |
| 738 | case <-deadline.C: |
| 739 | return |
| 740 | } |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | func (m *terminalManager) reopenForTab(tabID string) { |
| 745 | if m == nil { |
| 746 | return |
| 747 | } |
| 748 | tabID = strings.TrimSpace(tabID) |
| 749 | if tabID == "" { |
| 750 | return |
| 751 | } |
| 752 | m.mu.Lock() |
| 753 | if !m.closed { |
| 754 | delete(m.closedTabIDs, tabID) |
| 755 | } |
| 756 | m.mu.Unlock() |
| 757 | } |
| 758 | |
| 759 | func (m *terminalManager) removeSessionLocked(session *terminalSession) { |
| 760 | delete(m.sessions, session.view.ID) |
| 761 | ids := m.byWorkspace[session.workspaceKey] |
| 762 | filtered := ids[:0] |
| 763 | for _, id := range ids { |
| 764 | if id != session.view.ID { |
| 765 | filtered = append(filtered, id) |
| 766 | } |
| 767 | } |
| 768 | if len(filtered) == 0 { |
| 769 | delete(m.byWorkspace, session.workspaceKey) |
| 770 | } else { |
| 771 | m.byWorkspace[session.workspaceKey] = filtered |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | func (m *terminalManager) closeAll() { |
| 776 | if m == nil { |
| 777 | return |
| 778 | } |
| 779 | m.mu.Lock() |
| 780 | m.closed = true |
| 781 | sessions := make([]*terminalSession, 0, len(m.sessions)) |
| 782 | for _, session := range m.sessions { |
| 783 | sessions = append(sessions, session) |
| 784 | } |
| 785 | m.sessions = make(map[string]*terminalSession) |
| 786 | m.byWorkspace = make(map[string][]string) |
| 787 | m.mu.Unlock() |
| 788 | |
| 789 | for _, session := range sessions { |
| 790 | _ = session.process.Close() |
| 791 | } |
| 792 | deadline := time.NewTimer(terminalCloseWait) |
| 793 | defer deadline.Stop() |
| 794 | for _, session := range sessions { |
| 795 | select { |
| 796 | case <-session.done: |
| 797 | case <-deadline.C: |
| 798 | return |
| 799 | } |
| 800 | } |
| 801 | } |
| 802 | |
| 803 | func (m *terminalManager) readLoop(session *terminalSession) { |
| 804 | defer close(session.readDone) |
| 805 | buf := make([]byte, 8*1024) |
| 806 | for { |
| 807 | n, err := session.process.Read(buf) |
| 808 | if n > 0 { |
| 809 | active := false |
| 810 | m.mu.Lock() |
| 811 | if current := m.sessions[session.view.ID]; current == session { |
| 812 | session.output = appendTerminalSnapshot(session.output, buf[:n]) |
| 813 | active = true |
| 814 | } |
| 815 | m.mu.Unlock() |
| 816 | if active { |
| 817 | m.emitOutput(session.view.ID, buf[:n]) |
| 818 | } |
| 819 | } |
| 820 | if err != nil { |
| 821 | return |
| 822 | } |
| 823 | } |
| 824 | } |
| 825 | |
| 826 | func (m *terminalManager) waitLoop(session *terminalSession) { |
| 827 | exitCode, waitErr := session.process.Wait() |
| 828 | select { |
| 829 | case <-session.readDone: |
| 830 | case <-time.After(terminalCloseWait): |
| 831 | } |
| 832 | _ = session.process.Close() |
| 833 | if waitErr != nil && exitCode == 0 { |
| 834 | exitCode = -1 |
| 835 | } |
| 836 | m.mu.Lock() |
| 837 | removed := true |
| 838 | if current := m.sessions[session.view.ID]; current == session { |
| 839 | current.view.Running = false |
| 840 | current.view.ExitCode = &exitCode |
| 841 | removed = false |
| 842 | } |
| 843 | m.mu.Unlock() |
| 844 | close(session.done) |
| 845 | m.emitExit(session.view.ID, exitCode, removed) |
| 846 | } |
| 847 | |
| 848 | func (m *terminalManager) emitOutput(id string, data []byte) { |
| 849 | if m.app == nil || len(data) == 0 { |
| 850 | return |
| 851 | } |
| 852 | m.app.emitRuntimeEvent(terminalOutputChannel, map[string]any{ |
| 853 | "id": id, |
| 854 | "data": base64.StdEncoding.EncodeToString(data), |
| 855 | }) |
| 856 | } |
| 857 | |
| 858 | func (m *terminalManager) emitExit(id string, exitCode int, removed bool) { |
| 859 | if m.app == nil { |
| 860 | return |
| 861 | } |
| 862 | m.app.emitRuntimeEvent(terminalExitChannel, map[string]any{ |
| 863 | "id": id, |
| 864 | "exitCode": exitCode, |
| 865 | "removed": removed, |
| 866 | }) |
| 867 | } |
| 868 | |
| 869 | func newTerminalID() (string, error) { |
| 870 | var raw [8]byte |
| 871 | if _, err := rand.Read(raw[:]); err != nil { |
| 872 | return "", err |
| 873 | } |
| 874 | return "term-" + hex.EncodeToString(raw[:]), nil |
| 875 | } |
| 876 |