[FIX] *bot: copy filestore (shared dir) when copying db

Previously we would copy *only* the database itself, which is mostly
not an issue, but when trying to debug *pages* using a browser, that
browser tries to load various assets, which are looked up in the
database, then in the filestore, where they are missing.

This is not an issue in and of itself, but it triggers ugly tracebacks
in the logs which is not convenient, and since
2ab06ca96b it fails the test even if the
test would otherwise work.

conftest.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import select
+import shutil
 import threading
 from typing import Optional
 
@@ -306,7 +307,8 @@ class DbDict(dict):
                 self[module] = db
                 return db
 
-            d = atexit.enter_context(tempfile.TemporaryDirectory())
+            d = (self._shared_dir / f'shared-{module}')
+            d.mkdir()
             self[module] = db = 'template_%s' % uuid.uuid4()
             subprocess.run([
                 'odoo', '--no-http',
@@ -317,7 +319,7 @@ class DbDict(dict):
                 '--log-level', 'warn'
             ],
                 check=True,
-                env={**os.environ, 'XDG_DATA_HOME': d}
+                env={**os.environ, 'XDG_DATA_HOME': str(d)}
             )
             f.write(db)
             f.flush()
@@ -340,9 +342,18 @@ def dbcache(request, tmp_path_factory, addons_path):
     yield dbs
 
 @pytest.fixture
-def db(request, module, dbcache):
+def db(request, module, dbcache, tmpdir):
+    template_db = dbcache[module]
     rundb = str(uuid.uuid4())
-    subprocess.run(['createdb', '-T', dbcache[module], rundb], check=True)
+    subprocess.run(['createdb', '-T', template_db, rundb], check=True)
+    share = tmpdir.mkdir('share')
+    shutil.copytree(
+        str(dbcache._shared_dir / f'shared-{module}'),
+        str(share),
+        dirs_exist_ok=True,
+    )
+    (share / 'Odoo' / 'filestore' / template_db).rename(
+        share / 'Odoo' / 'filestore' / rundb)
 
     yield rundb
 
@@ -464,7 +475,7 @@ def server(request, db, port, module, addons_path, tmpdir):
         **os.environ,
         # stop putting garbage in the user dirs, and potentially creating conflicts
         # TODO: way to override this with macOS?
-        'XDG_DATA_HOME': str(tmpdir.mkdir('share')),
+        'XDG_DATA_HOME': str(tmpdir / 'share'),
         'XDG_CACHE_HOME': str(tmpdir.mkdir('cache')),
     })
     os.close(w)