Fix six quality findings from code review

sitecustomize.py:
- Restore _record_status count barrier: write the status file only after all
  patches have reported. middlewared.plugins.cloud_backup.restic is imported
  lazily (only when a backup task runs), so without this barrier verify would
  declare "all patches active" based solely on the B2 patch that fires at
  startup. Barrier now gates on _Finder._targets rather than the removed
  _PATCHES dict.
- Add comment in exec_module noting the if/elif must stay in sync with
  _Finder._targets, making the coupling visible.

patch_ui.py:
- Merge find_webui into find_bundle: previously find_bundle(None) would crash
  with os.walk(None) if main()'s guard were removed. Merged function returns
  a 3-tuple (webui_dir, path, content); webui_dir=None means no candidate
  directory found, path=None means directory found but pattern absent.
  main() still produces distinct messages for each failure mode.

create_task.py:
- Split triple-chained .get() in cmd_list_tasks into two lines; the or {}
  handling for None credentials was buried inside a one-liner.

uninstall.sh:
- Fix find loop: replace "for x in $(find ...)" with "while IFS= read -r"
  to handle paths containing spaces or newlines.
- Add #!/usr/bin/env shebang form to Python detection, matching apply.sh.
  Without this, uninstall on a system where middlewared uses the env form
  would silently leave sitecustomize.py in the wrong site-packages.

patch/create_task.py

@@ -139,7 +139,8 @@ def cmd_list_tasks(client, _args):
     print(f"{'ID':>4}  {'Enabled':<8}  {'Provider':<14}  Name")
     print("─" * 60)
     for t in sorted(tasks, key=lambda x: x["id"]):
-        ptype = (t.get("credentials") or {}).get("provider", {}).get("type", "?")
+        creds = t.get("credentials") or {}
+        ptype = creds.get("provider", {}).get("type", "?")
         enabled = "yes" if t.get("enabled") else "no"
         print(f"{t['id']:>4}  {enabled:<8}  {ptype:<14}  {t.get('description', '')}")
 

patch/patch_ui.py

@@ -40,19 +40,17 @@ REPLACE = r'\1["STORJ_IX","S3","B2"]'
 MARKER = '"STORJ_IX","S3","B2"'
 
 
-def find_webui():
+def find_bundle():
-    for d in WEBUI_CANDIDATES:
-        if os.path.isdir(d):
-            return d
-    return None
-
-
-def find_bundle(webui):
     """
-    Walk the webui directory looking for the JS file that contains the
+    Search WEBUI_CANDIDATES for the JS bundle containing the filterByProviders
-    filterByProviders binding. Returns (path, content) or (None, None).
+    binding. Returns (webui_dir, path, content). webui_dir is None if no
-    Only .js files are read; binary files and permission errors are skipped.
+    candidate directory exists; path is None if the directory exists but the
+    pattern is not found in any bundle.
     """
+    webui = next((d for d in WEBUI_CANDIDATES if os.path.isdir(d)), None)
+    if webui is None:
+        return None, None, None
+
     matches = []
     for root, _dirs, names in os.walk(webui):
         for name in sorted(names):          # deterministic order
@@ -68,7 +66,7 @@ def find_bundle(webui):
                 continue
 
     if not matches:
-        return None, None
+        return webui, None, None
 
     if len(matches) > 1:
         # Unexpected — log all matches so the operator can investigate.
@@ -79,19 +77,19 @@ def find_bundle(webui):
         for p, _ in matches:
             print(f"[truecloud-patch]   {p}")
 
-    return matches[0]
+    path, content = matches[0]
+    return webui, path, content
 
 
 def main():
-    webui = find_webui()
+    webui, path, content = find_bundle()
-    if not webui:
+    if webui is None:
         print(
             "[truecloud-patch] WARNING: webui directory not found; skipping UI patch.\n"
             "[truecloud-patch] Searched: " + ", ".join(WEBUI_CANDIDATES)
         )
         return
 
-    path, content = find_bundle(webui)
     if path is None:
         print(
             "[truecloud-patch] WARNING: filterByProviders pattern not found in any JS bundle.\n"

patch/sitecustomize.py

@@ -105,6 +105,7 @@ class _Loader:
             self._finder._mark_done(fullname)
 
         # exec_module succeeded — apply our patch.
+        # Must stay in sync with _Finder._targets.
         try:
             if fullname == "middlewared.rclone.remote.b2":
                 _patch_b2(module)
@@ -187,6 +188,8 @@ def _record_status(fullname: str, ok: bool, detail: str = "") -> None:
     if fullname in _hook_status:
         return  # idempotent: first call wins
     _hook_status[fullname] = {"ok": ok, "detail": detail}
+    if len(_hook_status) < len(_Finder._targets):
+        return  # wait until all patches have reported before writing
 
     payload = {
         "patched_at": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime()),

uninstall.sh

@@ -53,6 +53,8 @@ if [ -x /usr/bin/middlewared ]; then
     shebang=$(dd if=/usr/bin/middlewared bs=256 count=1 2>/dev/null | head -1 || true)
     if [[ "$shebang" =~ ^'#!'(/[^[:space:]]+python[^[:space:]]*) ]]; then
         PYTHON="${BASH_REMATCH[1]}"
+    elif [[ "$shebang" =~ ^'#!/usr/bin/env '(python[^[:space:]]*) ]]; then
+        PYTHON=$(command -v "${BASH_REMATCH[1]}" 2>/dev/null || echo "python3")
     fi
 fi
 
@@ -81,13 +83,13 @@ echo ""
 echo "Restoring UI bundle backup ..."
 
 RESTORED=0
-for backup in $(find /usr/share/truenas /var/www/truenas \
+while IFS= read -r backup; do
-                    -name "*.js.pre-truecloud-patch" 2>/dev/null); do
     original="${backup%.pre-truecloud-patch}"
     mv "$backup" "$original"
     echo "  Restored: $original"
     RESTORED=1
-done
+done < <(find /usr/share/truenas /var/www/truenas \
+              -name "*.js.pre-truecloud-patch" 2>/dev/null)
 
 if [ "$RESTORED" -eq 0 ]; then
     echo "  No backup files found."