restruct: needed paths get extra check

corrlib/integrity.py

@@ -11,6 +11,9 @@ from configparser import ConfigParser
 from typing import Any
 
 
+path_opts = ['db', 'projects_path', 'archive_path', 'toml_imports_path', 'import_scripts_path']
+
+
 def has_valid_times(result: pd.Series) -> bool:
     """
     Check, whether the result at hand has time-stamps that are sensible:
@@ -178,14 +181,29 @@ def check_config_validity(path: Path) -> None:
             raise ValueError("One of the options in the 'core' section  ('version', 'tracker', 'cached') is missing.")
 
     if config.has_section('paths'):
-        path_opts = ['db', 'projects_path', 'archive_path', 'toml_imports_path', 'import_scripts_path']
         has_path_opts = [config.has_option('paths', opt) for opt in path_opts]
         if not all(has_path_opts):
             raise ValueError("One of the options in the 'path' section  ('db', 'projects_path', 'archive_path', 'toml_imports_path', 'import_scripts_path') is missing.")
 
+
+def check_paths(path: Path) -> None:
+    """
+    Check whether all paths demanded by the 'paths' section of the configuration-file exist.
+
+    Parameters
+    ----------
+    path: Path
+        Path to the backlog-library to check.
+    """
+    config = ConfigParser()
+    config_path = path / CONFIG_FILENAME
+    if os.path.exists(config_path):
+        config.read(config_path)
+    else:
+        raise FileNotFoundError("Configuration file not found.")
     has_paths = [os.path.exists(path / config.get('paths', opt)) for opt in path_opts]
     if not all(has_paths):
-        raise FileNotFoundError("one of the paths needed by the configuration file is not present.")
+        raise FileNotFoundError("One of the paths specified in the configuration file is not present.")
 
 
 def full_integrity_check(path: Path) -> None:
@@ -201,6 +219,8 @@ def full_integrity_check(path: Path) -> None:
     print("Path and config-file exist:\t✅")
     check_config_validity(path)
     print("Configuration is valid:\t✅")
+    check_paths(path)
+    print("Needed paths exist:\t✅")
     check_db_integrity(path)
     print("DB:\t✅")
     check_db_file_links(path)