Add PAPERLESS_TRASH_DIR

When set, original files are moved here instead of being permanently
removed when a document is deleted.

src/paperless/checks.py

@@ -50,6 +50,7 @@ def paths_check(app_configs, **kwargs):
     """
 
     return path_check("PAPERLESS_DATA_DIR", settings.DATA_DIR) + \
+        path_check("PAPERLESS_TRASH_DIR", settings.TRASH_DIR) + \
         path_check("PAPERLESS_MEDIA_ROOT", settings.MEDIA_ROOT) + \
         path_check("PAPERLESS_CONSUMPTION_DIR", settings.CONSUMPTION_DIR)
 

src/paperless/settings.py

@@ -57,6 +57,8 @@ THUMBNAIL_DIR = os.path.join(MEDIA_ROOT, "documents", "thumbnails")
 
 DATA_DIR = os.getenv('PAPERLESS_DATA_DIR', os.path.join(BASE_DIR, "..", "data"))
 
+TRASH_DIR = os.getenv('PAPERLESS_TRASH_DIR')
+
 # Lock file for synchronizing changes to the MEDIA directory across multiple
 # threads.
 MEDIA_LOCK = os.path.join(MEDIA_ROOT, "media.lock")