documentation: clarify osm2pgsql isnt in project directory by default

[nominatim.git] / nominatim / clicmd / index.py

diff --git a/nominatim/clicmd/index.py b/nominatim/clicmd/index.py
index ca3f9deedf4e0546e211679336474a1615ef524d..73258be2c1acaef71f8d8dea3f315933ef5fd8cf 100644 (file)
--- a/nominatim/clicmd/index.py
+++ b/nominatim/clicmd/index.py
@@ -1,28 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file is part of Nominatim. (https://nominatim.org)
+#
+# Copyright (C) 2022 by the Nominatim developer community.
+# For a full list of authors see the git log.
 """
 Implementation of the 'index' subcommand.
 """
-import os
+import psutil
 
-from ..db import status
-from ..db.connection import connect
+from nominatim.db import status
+from nominatim.db.connection import connect
 
 # Do not repeat documentation of subcommand classes.
 # pylint: disable=C0111
 # Using non-top-level imports to avoid eventually unused imports.
 # pylint: disable=E0012,C0415
 
-def _num_system_cpus():
-    try:
-        cpus = len(os.sched_getaffinity(0))
-    except NotImplementedError:
-        cpus = None
-
-    return cpus or os.cpu_count()
-
 
 class UpdateIndex:
     """\
     Reindex all new and modified data.
+
+    Indexing is the process of computing the address and search terms for
+    the places in the database. Every time data is added or changed, indexing
+    needs to be run. Imports and replication updates automatically take care
+    of indexing. For other cases, this function allows to run indexing manually.
     """
 
     @staticmethod
@@ -40,9 +43,12 @@ class UpdateIndex:
     @staticmethod
     def run(args):
         from ..indexer.indexer import Indexer
+        from ..tokenizer import factory as tokenizer_factory
+
+        tokenizer = tokenizer_factory.get_tokenizer_for_db(args.config)
 
-        indexer = Indexer(args.config.get_libpq_dsn(),
-                          args.threads or _num_system_cpus() or 1)
+        indexer = Indexer(args.config.get_libpq_dsn(), tokenizer,
+                          args.threads or psutil.cpu_count() or 1)
 
         if not args.no_boundaries:
             indexer.index_boundaries(args.minrank, args.maxrank)
@@ -51,8 +57,7 @@ class UpdateIndex:
 
         if not args.no_boundaries and not args.boundaries_only \
            and args.minrank == 0 and args.maxrank == 30:
-            conn = connect(args.config.get_libpq_dsn())
-            status.set_indexed(conn, True)
-            conn.close()
+            with connect(args.config.get_libpq_dsn()) as conn:
+                status.set_indexed(conn, True)
 
         return 0