Function makeSystemdBackend

apps/cli/src/service.ts:475–584

()

};

const makeSystemdBackend = (): ServiceBackend => {
  const unitName = `${SERVICE_LABEL}.service`;
  return {
    platform: "linux",
    automated: true,
    install: (descriptor) =>
      Effect.gen(function* () {
        const fs = yield* FileSystem.FileSystem;
        const path = yield* Path.Path;
        const dataDir = resolveExecutorDataDir(path);
        const logs = serviceLogDir(path);
        yield* fs.makeDirectory(systemdUnitDir(path), { recursive: true });
        yield* fs.makeDirectory(logs, { recursive: true });
        const unit = generateSystemdUnit({
          execStart: serviceProgramArguments(descriptor),
          environment: serviceEnvironment(descriptor, dataDir),
          workingDirectory: dataDir,
          stdoutPath: path.join(logs, "daemon.log"),
          stderrPath: path.join(logs, "daemon.error.log"),
        });
        yield* fs.writeFileString(systemdUnitPath(path), unit, { mode: 0o600 });
        // `systemctl --user` needs XDG_RUNTIME_DIR to reach the user bus. Supply
        // it if the caller's environment lacks it (e.g. a non-login shell) so
        // install is robust regardless of how it was invoked.
        const username = userInfo().username;
        const sdEnv = {
          XDG_RUNTIME_DIR: process.env.XDG_RUNTIME_DIR ?? `/run/user/${currentUid()}`,
        };
        yield* runCommand("systemctl", ["--user", "daemon-reload"], sdEnv).pipe(Effect.ignore);
        const enable = yield* runCommand(
          "systemctl",
          ["--user", "enable", "--now", unitName],
          sdEnv,
        );
        if (enable.code !== 0) {
          return yield* Effect.fail(
            new Error(
              `systemctl --user enable failed (exit ${enable.code}): ${enable.stderr.trim()}`,
            ),
          );
        }
        // Enable lingering so the user manager — and this enabled service —
        // starts at BOOT, not just on login, so the daemon survives a reboot
        // unattended (verified in a real Ubuntu VM via loginctl). Best-effort:
        // if the platform needs privilege, the service still works for the
        // logged-in case and `service status` flags the missing linger.
        yield* runCommand("loginctl", ["enable-linger", username], sdEnv).pipe(Effect.ignore);
      }),
    uninstall: () =>
      Effect.gen(function* () {
        const fs = yield* FileSystem.FileSystem;
        const path = yield* Path.Path;
        const sdEnv = {
          XDG_RUNTIME_DIR: process.env.XDG_RUNTIME_DIR ?? `/run/user/${currentUid()}`,
        };
        yield* runCommand("systemctl", ["--user", "disable", "--now", unitName], sdEnv).pipe(
          Effect.ignore,
        );