From 08b99ab34069aa61673c7e7bf19d4d0fe1e7cc19 Mon Sep 17 00:00:00 2001
From: grymphen <grymphen@gmail.com>
Date: Sun, 10 May 2026 16:22:43 +0200
Subject: [PATCH] sync errors

---
 sftp.py | 11 ++++++++++-
 sync.py |  5 ++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/sftp.py b/sftp.py
index df34c15..0d49b88 100644
--- a/sftp.py
+++ b/sftp.py
@@ -1,12 +1,15 @@
 import io
 import logging
 import posixpath
+import socket
 import stat
 from dataclasses import dataclass
 from pathlib import Path
 
 import paramiko
 
+CONNECT_TIMEOUT = 30  # seconds for TCP + SSH handshake
+
 import db
 from config import SFTPConfig
 
@@ -46,12 +49,18 @@ def get_key_fingerprint(pem: str) -> str | None:
 
 
 def _make_transport(cfg: SFTPConfig) -> paramiko.Transport:
-    transport = paramiko.Transport((cfg.host, cfg.port))
+    log.debug("Opening TCP connection to %s:%s", cfg.host, cfg.port)
+    sock = socket.create_connection((cfg.host, cfg.port), timeout=CONNECT_TIMEOUT)
+    transport = paramiko.Transport(sock)
+    transport.banner_timeout = CONNECT_TIMEOUT
+    transport.handshake_timeout = CONNECT_TIMEOUT
+    log.debug("Starting SSH handshake")
     if cfg.auth_method == "key" and cfg.key:
         key = _load_private_key(cfg.key)
         transport.connect(username=cfg.user, pkey=key)
     else:
         transport.connect(username=cfg.user, password=cfg.password)
+    log.debug("SSH authenticated")
     return transport
 
 
diff --git a/sync.py b/sync.py
index bac4d2a..99f2ccd 100644
--- a/sync.py
+++ b/sync.py
@@ -35,13 +35,16 @@ def run_sync(limit: int | None = None) -> None:
     counters = dict(zips_found=0, zips_new=0, books_uploaded=0, books_skipped=0, books_errored=0)
 
     try:
+        log.info("Sync started (limit=%s)", limit)
         cfg = config.load()
         _validate_config(cfg)
+        log.info("Config OK — work dir: %s", cfg.local_work_dir)
 
         work_dir = Path(cfg.local_work_dir)
         work_dir.mkdir(parents=True, exist_ok=True)
+        log.info("Work dir ready: %s", work_dir)
 
-        log.info("Listing remote zips at %s@%s:%s", cfg.sftp.user, cfg.sftp.host, cfg.sftp.remote_path)
+        log.info("Connecting to SFTP %s@%s:%s ...", cfg.sftp.user, cfg.sftp.host, cfg.sftp.port)
         new_zips = sftp_module.list_new_zips(cfg.sftp)
         counters["zips_found"] = len(new_zips)