// @effect-diagnostics nodeBuiltinImport:off// node:child_process directly: the foreground-server replacement must be a// detached fire-and-forget child that outlives this process, while Effect's// ChildProcessSpawner ties every child to a scope that kills it.import {  ServerSelfUpdateError,  type ServerSelfUpdateCapability,  type ServerSelfUpdateInput,  type ServerSelfUpdateResult,} from "@t3tools/contracts";import {  HostProcessArguments,  HostProcessEnvironment,  HostProcessExecutablePath,  HostProcessPlatform,} from "@t3tools/shared/hostProcess";import * as NodeChildProcess from "node:child_process";import * as Context from "effect/Context";import * as Duration from "effect/Duration";import * as Effect from "effect/Effect";import * as FileSystem from "effect/FileSystem";import * as Layer from "effect/Layer";import * as Path from "effect/Path";import * as Ref from "effect/Ref"; import * as ServerConfig from "../config.ts";import { writeFileStringAtomically } from "../atomicWrite.ts";import * as ProcessRunner from "../processRunner.ts";import {  BOOT_SERVICE_UNIT_ENV,  BOOT_SERVICE_UNIT_FILE,  quoteSystemdValue,  renderBootServiceUnit,} from "./bootService.ts";import { ensurePinnedRuntimeInstalled, removePinnedRuntimeInstallation } from "./pinnedRuntime.ts"; /** * Lets a connected client replace this server with another published `t3` * version over RPC — the only update path that works when the user is not at * the machine (phone against a home server, relay-managed box). The target * version is npm-installed into the pinned runtime and verified before * anything restarts, so a failed install leaves the running server untouched. */ const PREFLIGHT_TIMEOUT = Duration.seconds(30);/** Grace between acknowledging the RPC and killing the process, so the    response (and its relay hop) flushes before the socket drops. */const RESTART_DELAY = Duration.seconds(2); /** Exact npm versions only — never dist-tags — so the acknowledgement names    the version that was actually installed. Also keeps the value safe to    pass to npm and embed in filesystem paths. */const EXACT_VERSION_PATTERN = /^\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)?(?:\+[0-9A-Za-z.-]+)?$/; export interface ServerSelfUpdateHost {  readonly execPath: string;  readonly cliEntryPath: string;  /** Original CLI arguments after the entry path, replayed on respawn. */  readonly cliArgs: ReadonlyArray<string>;  /** Resolves once the foreground replacement process has actually spawned. */  readonly spawnDetached: (    command: string,    args: ReadonlyArray<string>,  ) => Effect.Effect<void, ProcessRunner.ProcessSpawnError>;  readonly exitProcess: () => void;} function normalizeEntryPath(entryPath: string): string {  return entryPath.replaceAll("\\", "/");} /** * Only a published npm artifact can be swapped for another version: dev * checkouts (apps/server/dist) and the desktop app's bundled backend have no * npm identity, and the desktop manages its own updates. */export function isPublishedCliEntry(entryPath: string): boolean {  return normalizeEntryPath(entryPath).includes("/node_modules/t3/dist/");} /** * The update path this process can offer, or null when only a manual * relaunch works. "desktop-managed" — the T3 Code desktop app spawned this * backend and owns its version; only updating the app updates it. * "boot-service" — this is the systemd-supervised process from * bootService.ts: rewrite the unit and let systemd swap it. "respawn" — a * foreground POSIX process running a published artifact: replace it with a * detached child. Windows foreground runs are unsupported for now (no * equivalent of the detach-and-exec handoff below). */export const resolveServerSelfUpdateCapability = Effect.fn(  "cloud.server_self_update.resolve_capability",)(function* (input: {  /** True when the desktop app supervises this backend (mode "desktop"). */  readonly desktopManaged: boolean;}) {  if (input.desktopManaged) {    return "desktop-managed" as const;  }   const platform = yield* HostProcessPlatform;  const env = yield* HostProcessEnvironment;  const hostArguments = yield* HostProcessArguments;  const fs = yield* FileSystem.FileSystem;  const path = yield* Path.Path;   const entryPath = hostArguments[1] ?? "";  if (entryPath === "") {    return null;  }   const homeDir = env.HOME ?? "";  if (platform === "linux" && homeDir !== "") {    const unitPath = path.join(homeDir, ".config", "systemd", "user", BOOT_SERVICE_UNIT_FILE);    const unitReferencesEntry = yield* fs.readFileString(unitPath).pipe(      Effect.map((unit) => unit.includes(quoteSystemdValue(entryPath))),      Effect.orElseSucceed(() => false),    );    // INVOCATION_ID only proves that some systemd unit launched us. The    // explicit marker written into t3code.service identifies this unit as the    // supervisor that will replace the current process when restarted.    if (      unitReferencesEntry &&      (env.INVOCATION_ID ?? "") !== "" &&      env[BOOT_SERVICE_UNIT_ENV] === BOOT_SERVICE_UNIT_FILE    ) {      return "boot-service" as const;    }     // A process owned by another (or a legacy unmarked) systemd unit must not    // use the foreground respawn path: Restart=always could otherwise launch    // the old unit beside the detached replacement.    if ((env.INVOCATION_ID ?? "") !== "") {      return null;    }  }   if ((platform === "linux" || platform === "darwin") && isPublishedCliEntry(entryPath)) {    return "respawn" as const;  }   return null;}); export class ServerSelfUpdate extends Context.Service<  ServerSelfUpdate,  {    readonly update: (      input: ServerSelfUpdateInput,    ) => Effect.Effect<ServerSelfUpdateResult, ServerSelfUpdateError>;  }>()("t3/cloud/selfUpdate/ServerSelfUpdate") {} export const make = Effect.fn("cloud.server_self_update.make")(function* (options?: {  readonly host?: Partial<ServerSelfUpdateHost>;}) {  const serverConfig = yield* ServerConfig.ServerConfig;  const fs = yield* FileSystem.FileSystem;  const path = yield* Path.Path;  const runner = yield* ProcessRunner.ProcessRunner;  const env = yield* HostProcessEnvironment;  const hostExecPath = yield* HostProcessExecutablePath;  const hostArguments = yield* HostProcessArguments;  const capability: ServerSelfUpdateCapability | null = yield* resolveServerSelfUpdateCapability({    desktopManaged: serverConfig.mode === "desktop",  });   const host: ServerSelfUpdateHost = {    execPath: options?.host?.execPath ?? hostExecPath,    cliEntryPath: options?.host?.cliEntryPath ?? hostArguments[1] ?? "",    cliArgs: options?.host?.cliArgs ?? hostArguments.slice(2),    spawnDetached:      options?.host?.spawnDetached ??      ((command, args) =>        Effect.callback<void, ProcessRunner.ProcessSpawnError>((resume) => {          const spawnError = (cause: unknown) =>            new ProcessRunner.ProcessSpawnError({              command,              argumentCount: args.length,              cause,            });          let child: NodeChildProcess.ChildProcess;          try {            child = NodeChildProcess.spawn(command, [...args], {              detached: true,              stdio: "ignore",            });          } catch (cause) {            resume(Effect.fail(spawnError(cause)));            return;          }           const onSpawnError = (cause: Error) => resume(Effect.fail(spawnError(cause)));          child.once("error", onSpawnError);          child.once("spawn", () => {            child.removeListener("error", onSpawnError);            // Keep asynchronous child errors from becoming uncaught after the            // successful spawn handoff has already been acknowledged.            child.on("error", () => undefined);            child.unref();            resume(Effect.void);          });        })),    exitProcess: options?.host?.exitProcess ?? (() => process.exit(0)),  };   const inFlight = yield* Ref.make(false);   const failWith = (reason: string, cause?: unknown) =>    cause === undefined      ? new ServerSelfUpdateError({ reason })      : new ServerSelfUpdateError({ reason, cause });   /** Deferred so the RPC acknowledgement flushes before the process dies.      Detached from the request scope: the triggering connection is exactly      what the restart tears down. */  const scheduleRestart = (restart: Effect.Effect<void>) =>    Effect.sleep(RESTART_DELAY).pipe(      Effect.andThen(restart),      Effect.forkDetach({ startImmediately: true }),    );  const writeUnitAtomically = (filePath: string, contents: string) =>    writeFileStringAtomically({ filePath, contents }).pipe(      Effect.provideService(FileSystem.FileSystem, fs),      Effect.provideService(Path.Path, path),    );   const update: ServerSelfUpdate["Service"]["update"] = Effect.fn(    "cloud.server_self_update.update",  )(function* (input) {    if (capability === "desktop-managed") {      return yield* failWith(        "This server is managed by the T3 Code desktop app on its machine; update the desktop app to update it.",      );    }    if (capability === null) {      return yield* failWith(        "This server cannot update itself; relaunch it manually with the new version.",      );    }    const activeMethod = capability;    const targetVersion = input.targetVersion.trim();    if (!EXACT_VERSION_PATTERN.test(targetVersion)) {      return yield* failWith(`'${targetVersion}' is not an exact t3 version.`);    }     const alreadyRunning = yield* Ref.getAndSet(inFlight, true);    if (alreadyRunning) {      return yield* failWith("A server update is already in progress.");    }     return yield* Effect.gen(function* () {      const runtimePaths = yield* ensurePinnedRuntimeInstalled({        baseDir: serverConfig.baseDir,        version: targetVersion,        fs,        path,        runner,      }).pipe(        Effect.mapError((error) => failWith("Could not install the requested t3 version.", error)),      );       // A broken artifact (failed native build, incompatible node) must be      // caught while the current server is still alive to report it.      const preflight = yield* runner        .run({          command: host.execPath,          args: [runtimePaths.entryPath, "--version"],          timeout: PREFLIGHT_TIMEOUT,        })        .pipe(          Effect.mapError((cause) =>            failWith(`Could not verify the installed t3@${targetVersion}.`, cause),          ),        );      // Effect CLI's unstable formatVersion currently emits `${name} v${version}`.      // Extract the version token so surrounding presentation changes do not break updates.      const reportedVersion = /\bv(\S+)\s*$/.exec(preflight.stdout)?.[1];      if (preflight.code !== 0 || reportedVersion !== targetVersion) {        // A completed npm install can still be unusable under this Node or on        // this machine. Remove its sentinel and tree so a retry of the same        // version performs a clean install instead of reusing a known-bad one.        yield* removePinnedRuntimeInstallation({          baseDir: serverConfig.baseDir,          version: targetVersion,          fs,          path,        }).pipe(          Effect.mapError((error) =>            failWith(`Could not remove the failed t3@${targetVersion} installation.`, error),          ),        );        return yield* failWith(          preflight.code !== 0            ? `The installed t3@${targetVersion} failed its version check (exit code ${String(preflight.code)}).`            : `The installed runtime did not report the requested t3@${targetVersion} version.`,        );      }       if (activeMethod === "boot-service") {        const homeDir = env.HOME ?? "";        const unitPath = path.join(homeDir, ".config", "systemd", "user", BOOT_SERVICE_UNIT_FILE);        const previousUnit = yield* fs          .readFileString(unitPath)          .pipe(            Effect.mapError((cause) => failWith("Could not read the current systemd unit.", cause)),          );        // Same shape bootService.install writes, so host lifecycle commands        // still recognize the unit as current.        const unit = renderBootServiceUnit({          nodePath: host.execPath,          t3EntryPath: runtimePaths.entryPath,          baseDir: serverConfig.baseDir,          logPath: path.join(serverConfig.logsDir, "boot-service.log"),          unitPath,        });        yield* writeUnitAtomically(unitPath, unit).pipe(          Effect.mapError((cause) => failWith("Could not update the systemd unit.", cause)),        );         const reloadSystemd = Effect.fn("cloud.server_self_update.reload_systemd")(function* () {          const reload = yield* runner            .run({ command: "systemctl", args: ["--user", "daemon-reload"] })            .pipe(Effect.mapError((cause) => failWith("Could not reload systemd units.", cause)));          if (reload.code !== 0) {            return yield* failWith(              `Reloading systemd units failed (exit code ${String(reload.code)}).`,            );          }        });         yield* reloadSystemd().pipe(          Effect.catch((reloadError) =>            writeUnitAtomically(unitPath, previousUnit).pipe(              Effect.mapError((rollbackCause) =>                failWith("Could not restore the previous systemd unit.", {                  reloadError,                  rollbackCause,                }),              ),              // Systemd should still have the old unit in memory after the              // failed reload, but retry after restoring in case it applied a              // partial update before returning an error.              Effect.andThen(reloadSystemd().pipe(Effect.ignore)),              Effect.andThen(Effect.fail(reloadError)),            ),          ),        );        yield* Effect.logInfo("Server self-update installed; restarting boot service.", {          targetVersion,        });        // A successful systemd restart stops this process, so the RPC is        // interrupted and the reconnecting client observes the new version.        // A rejected restart returns while the old process is still alive;        // restore the previous unit and report that failure through the RPC.        yield* Effect.gen(function* () {          const restart = yield* runner            .run({              command: "systemctl",              args: ["--user", "restart", BOOT_SERVICE_UNIT_FILE],            })            .pipe(              Effect.mapError((cause) =>                failWith("Could not restart the systemd boot service.", cause),              ),            );          if (restart.code !== 0) {            return yield* failWith(              `Restarting the systemd boot service failed (exit code ${String(restart.code)}).`,            );          }        }).pipe(          Effect.catch((restartError) =>            writeUnitAtomically(unitPath, previousUnit).pipe(              Effect.andThen(reloadSystemd()),              Effect.mapError((rollbackError) =>                failWith("Could not restore the previous systemd unit.", {                  restartError,                  rollbackError,                }),              ),              Effect.andThen(Effect.fail(restartError)),            ),          ),        );      } else {        // Spawn the shim before acknowledging the RPC so ENOENT/EACCES and        // other launch failures leave this server alive and return a useful        // error. The shim itself waits until after the acknowledgement and        // deferred exit before binding the replacement server.        yield* host          .spawnDetached("/bin/sh", [            "-c",            'sleep 3; exec "$@"',            "t3-self-update",            host.execPath,            runtimePaths.entryPath,            ...host.cliArgs,          ])          .pipe(            Effect.mapError((cause) =>              failWith("Could not start the replacement t3 process.", cause),            ),          );        yield* Effect.logInfo("Server self-update installed; respawning.", { targetVersion });        yield* scheduleRestart(          Effect.try({            try: () => host.exitProcess(),            catch: (cause) => failWith("Could not exit the replaced t3 process.", cause),          }).pipe(            Effect.catch((error) =>              Effect.logError("Server self-update could not exit the replaced process.").pipe(                Effect.annotateLogs({ targetVersion, error: error.reason }),                Effect.ensuring(Ref.set(inFlight, false)),              ),            ),          ),        );      }       return { targetVersion, method: activeMethod };    }).pipe(Effect.onError(() => Ref.set(inFlight, false)));  });   return ServerSelfUpdate.of({ update });}); export const layer = Layer.effect(ServerSelfUpdate, make()).pipe(  Layer.provide(ProcessRunner.layer),);