fix: Detect stale NFS mounts in path existence check (#166)

docs/overrides/partials/integrations/analytics/custom.html

@@ -0,0 +1,6 @@
+<!-- Privacy-friendly analytics by Plausible -->
+<script async src="https://plausible.nijho.lt/js/pa-NRX7MolONWKTUREJpAjkB.js"></script>
+<script>
+  window.plausible=window.plausible||function(){(plausible.q=plausible.q||[]).push(arguments)},plausible.init=plausible.init||function(i){plausible.o=i||{}};
+  plausible.init()
+</script>

src/compose_farm/executor.py

@@ -631,18 +631,28 @@ async def check_paths_exist(
     host_name: str,
     paths: list[str],
 ) -> dict[str, bool]:
-    """Check if multiple paths exist on a specific host.
+    """Check if multiple paths exist and are accessible on a specific host.
 
     Returns a dict mapping path -> exists.
     Handles permission denied as "exists" (path is there, just not accessible).
+    Uses timeout to detect stale NFS mounts that would hang.
     """
-    # Only report missing if stat says "No such file", otherwise assume exists
-    # (handles permission denied correctly - path exists, just not accessible)
+    # Use timeout to detect stale NFS mounts (which hang on access)
+    # - First try ls with timeout to check accessibility
+    # - If ls succeeds: path exists and is accessible
+    # - If ls fails/times out: use stat (also with timeout) to distinguish
+    #   "no such file" from "permission denied" or stale NFS
+    # - Timeout (exit code 124) is treated as inaccessible (stale NFS mount)
     return await _batch_check_existence(
         config,
         host_name,
         paths,
-        lambda esc: f"stat '{esc}' 2>&1 | grep -q 'No such file' && echo 'N:{esc}' || echo 'Y:{esc}'",
+        lambda esc: (
+            f"OUT=$(timeout 2 stat '{esc}' 2>&1); RC=$?; "
+            f"if [ $RC -eq 124 ]; then echo 'N:{esc}'; "
+            f"elif echo \"$OUT\" | grep -q 'No such file'; then echo 'N:{esc}'; "
+            f"else echo 'Y:{esc}'; fi"
+        ),
         "mount-check",
     )
 

zensical.toml

@@ -26,6 +26,7 @@ nav = [
 ]
 
 [project.theme]
+custom_dir = "docs/overrides"
 language = "en"
 
 features = [
@@ -81,6 +82,9 @@ repo = "lucide/github"
 [project.extra]
 generator = false
 
+[project.extra.analytics]
+provider = "custom"
+
 [[project.extra.social]]
 icon = "fontawesome/brands/github"
 link = "https://github.com/basnijholt/compose-farm"