[UCA-376] Make EOS user home path configurable

Necessary to allow EOS Home as the new default home.
Necessary to allow ScienceBox EOS path structure (/eos/docker/user).

SwanContents/swancontents/filemanager/fileio.py

@@ -86,7 +86,10 @@ class SwanFileManagerMixin(FileManagerMixin):
             path = path.split('/')
             if len(path) < 3:
                  raise HTTPError(404)
-            return url_path_join('/eos/user', path[1][0], path[1], 'SWAN_projects', "/".join(path[2:]))
+                
+            eosbasepath_format = os.getenv('EOS_PATH_FORMAT', '/eos/user/{username[0]}/{username}/')
+            user_basepath = eosbasepath_format.format(username = path[1])
+            return url_path_join(user_basepath, 'SWAN_projects', *(path[2:]))
 
         else:
             return super()._get_os_path(path)

SwanContents/swancontents/filemanager/handlers.py

@@ -18,6 +18,7 @@ class SwanAuthenticatedFileHandler(AuthenticatedFileHandler):
         self.root = os.path.abspath(path) + os.path.sep
         self.default_filename = default_filename
         self.default_path = default_path
+        self.eosbasepath_format = os.getenv('EOS_PATH_FORMAT', '/eos/user/{username[0]}/{username}/')
 
     @web.authenticated
     def get(self, path):
@@ -25,7 +26,8 @@ class SwanAuthenticatedFileHandler(AuthenticatedFileHandler):
         if self.root.startswith('/eos/'):
             if path.startswith('swan_sharing_folder/'):
                 path = path.split('/')
-                path = url_path_join('/eos/user', path[1][0], path[1], 'SWAN_projects', "/".join(path[2:]))
+                user_basepath = self.eosbasepath_format.format(username = path[1])
+                path = url_path_join(user_basepath, 'SWAN_projects', *(path[2:]))
             else:
                 path = url_path_join(self.default_path, path)