Github Actions: add codespell linter, warn only

.codespellrc

@@ -0,0 +1,7 @@
+# https://github.com/codespell-project/codespell
+
+[codespell]
+skip = ./man/nominatim.1,data,./docs/styles.css,lib-php,module,munin,osm2pgsql,./test,./settings/*.lua,./settings/*.yaml,./settings/**/*.yaml,./settings/icu-rules,./nominatim/tokenizer/token_analysis/config_variants.py
+# Need to be lowercase in the list
+# Unter = Unter den Linden (an example address)
+ignore-words-list = inout,unter

.github/workflows/ci-tests.yml

@@ -386,3 +386,10 @@ jobs:
 
           - name: Check full import
             run: nominatim admin --check-database
+
+    codespell:
+      runs-on: ubuntu-latest
+      steps:
+          - uses: codespell-project/actions-codespell@v2
+            with:
+                only_warn: 1

nominatim/api/search/db_search_builder.py

@@ -5,7 +5,7 @@
 # Copyright (C) 2023 by the Nominatim developer community.
 # For a full list of authors see the git log.
 """
-Convertion from token assignment to an abstract DB search.
+Conversion from token assignment to an abstract DB search.
 """
 from typing import Optional, List, Tuple, Iterator, Dict
 import heapq

nominatim/db/connection.py

@@ -239,7 +239,7 @@ _PG_CONNECTION_STRINGS = {
 def get_pg_env(dsn: str,
                base_env: Optional[SysEnv] = None) -> Dict[str, str]:
     """ Return a copy of `base_env` with the environment variables for
-        PostgresSQL set up from the given database connection string.
+        PostgreSQL set up from the given database connection string.
         If `base_env` is None, then the OS environment is used as a base
         environment.
     """

settings/env.defaults

@@ -123,9 +123,9 @@ NOMINATIM_TABLESPACE_ADDRESS_DATA=
 # Tablespace for indexes used during address computation. Used for import and update only.
 NOMINATIM_TABLESPACE_ADDRESS_INDEX=
 
-# Tablespace for tables for auxilary data, e.g. TIGER data, postcodes.
+# Tablespace for tables for auxiliary data, e.g. TIGER data, postcodes.
 NOMINATIM_TABLESPACE_AUX_DATA=
-# Tablespace for indexes for auxilary data, e.g. TIGER data, postcodes.
+# Tablespace for indexes for auxiliary data, e.g. TIGER data, postcodes.
 NOMINATIM_TABLESPACE_AUX_INDEX=
 
 
@@ -183,7 +183,7 @@ NOMINATIM_SEARCH_BATCH_MODE=no
 
 # Threshold for searches by name only.
 # Threshold where the lookup strategy in the database is switched. If there
-# are less occurences of a tem than given, the search does the lookup only
+# are less occurrences of a tem than given, the search does the lookup only
 # against the name, otherwise it uses indexes for name and address.
 NOMINATIM_SEARCH_NAME_ONLY_THRESHOLD=500
 
@@ -210,8 +210,8 @@ NOMINATIM_API_POOL_SIZE=10
 NOMINATIM_QUERY_TIMEOUT=10
 
 # Maximum time a single request is allowed to take. When the timeout is
-# exceeeded, the available results are returned.
+# exceeded, the available results are returned.
-# When empty, then timouts are disabled.
+# When empty, then timeouts are disabled.
 NOMINATIM_REQUEST_TIMEOUT=60
 
 # Search elements just within countries