Add support for gpu-rent.vars and enhance git update functionality

- Updated .gitignore to include gpu-rent.vars.
- Modified env.example to introduce the UPDATE_GIT variable for controlling git updates during execution.
- Implemented Import-GpuRentVars function in gpu-rent.ps1 to load environment variables from gpu-rent.vars.
- Enhanced gpu-rent.sh to support loading variables from gpu-rent.vars and added logic for handling default and extra arguments.
- Updated CLI documentation to reflect the new gpu-rent.vars file and its usage in configuration.
- Improved bootstrap and provisioning logic to conditionally perform git updates based on the new configuration.

src/gpu_rent/session.py

@@ -46,7 +46,7 @@ from gpu_rent.os_client import (
     iter_volume_types,
 )
 from gpu_rent.ssh_keys import ensure_ed25519
-from gpu_rent.ssh_ops import probe_ssh, wait_ssh
+from gpu_rent.ssh_ops import probe_ssh, run_ssh, wait_ssh
 from gpu_rent.state import SessionState, load_state, save_state, utc_now
 
 Log = Callable[[str], None]
@@ -66,7 +66,15 @@ def _require_gpu_quota(conn) -> None:
         )
 
 
-def _bind_access(conn, server, state: SessionState, cfg: Config, log: Log) -> SessionState:
+def _bind_access(
+    conn,
+    server,
+    state: SessionState,
+    cfg: Config,
+    log: Log,
+    *,
+    update: bool = True,
+) -> SessionState:
     ip, fip_id = ensure_floating_ip(
         conn, server, state.floating_ip_id, state.floating_ip, log
     )
@@ -76,8 +84,20 @@ def _bind_access(conn, server, state: SessionState, cfg: Config, log: Log) -> Se
     save_state(state)
     wait_ssh(cfg, ip)
     log(f"SSH {cfg.ssh_user}@{ip}")
-    run_bootstrap(cfg, ip, log)
-    provision_vm(cfg, ip, log, conn=conn, server_id=getattr(server, "id", None) or state.server_id)
+    if update:
+        active = run_ssh(cfg, ip, "systemctl is-active swarmui 2>/dev/null || true", check=False).strip()
+        if active == "active":
+            log("systemctl stop swarmui перед git update")
+            run_ssh(cfg, ip, "sudo -n systemctl stop swarmui", timeout=120, check=False)
+    run_bootstrap(cfg, ip, log, update=update)
+    provision_vm(
+        cfg,
+        ip,
+        log,
+        conn=conn,
+        server_id=getattr(server, "id", None) or state.server_id,
+        update=update,
+    )
     try:
         wait_backend_idle(cfg, ip, log)
     except CloudError as exc:
@@ -99,7 +119,7 @@ def _bind_access(conn, server, state: SessionState, cfg: Config, log: Log) -> Se
     return state
 
 
-def adopt_server(cfg: Config, log: Log = _log_default) -> SessionState:
+def adopt_server(cfg: Config, log: Log = _log_default, *, update: bool = True) -> SessionState:
     conn = connect(cfg)
     server = pick_existing_server(conn)
     if not server:
@@ -115,7 +135,7 @@ def adopt_server(cfg: Config, log: Log = _log_default) -> SessionState:
     save_state(state)
     log(f"подхватили {server.id} статус {server_status(server)}")
     if server_status(server) == "ACTIVE":
-        _bind_access(conn, server, state, cfg, log)
+        _bind_access(conn, server, state, cfg, log, update=update)
     return state
 
 
@@ -126,12 +146,14 @@ def cmd_up(
     flavor: str | None = None,
     yes: bool = False,
     adopt: bool = False,
+    update: bool | None = None,
     confirm: Callable[[str], bool] | None = None,
     log: Log = _log_default,
 ) -> SessionState:
+    do_update = cfg.update_git if update is None else update
     with SessionLock():
         if adopt:
-            return adopt_server(cfg, log=log)
+            return adopt_server(cfg, log=log, update=do_update)
         conn = connect(cfg)
         _require_gpu_quota(conn)
         state = load_state()
@@ -145,7 +167,7 @@ def cmd_up(
                     log("сервер уже ACTIVE — второй GPU не создаём")
                     state.phase = "ready_cloud"
                     save_state(state)
-                    _bind_access(conn, existing, state, cfg, log)
+                    _bind_access(conn, existing, state, cfg, log, update=do_update)
                     return state
 
                 # Bootstrap не завершён: почти всегда VM без authorized_keys.
@@ -167,7 +189,7 @@ def cmd_up(
                     log("сервер ACTIVE, SSH ок — продолжаем bootstrap")
                     state.phase = "ready_cloud"
                     save_state(state)
-                    _bind_access(conn, existing, state, cfg, log)
+                    _bind_access(conn, existing, state, cfg, log, update=do_update)
                     return state
 
                 log(
@@ -194,7 +216,7 @@ def cmd_up(
                 state.phase = "ready_cloud"
                 state.unshelved_at = utc_now()
                 save_state(state)
-                _bind_access(conn, existing, state, cfg, log)
+                _bind_access(conn, existing, state, cfg, log, update=do_update)
                 return state
             if existing is not None:
                 raise CloudError(f"сервер gpu-rent в статусе {status} — разбери в панели")
@@ -321,7 +343,7 @@ def cmd_up(
         state.unshelved_at = None
         state.phase = "ready_cloud"
         save_state(state)
-        _bind_access(conn, server, state, cfg, log)
+        _bind_access(conn, server, state, cfg, log, update=do_update)
         return state