+# 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.
"""
Functions for importing tiger data and handling tarbar and directory files
"""
+from typing import Any, TextIO, List, Union, cast
import csv
import io
import logging
import os
import tarfile
-import psycopg2.extras
+from psycopg2.extras import Json
+from nominatim.config import Configuration
from nominatim.db.connection import connect
from nominatim.db.async_connection import WorkerPool
from nominatim.db.sql_preprocessor import SQLPreprocessor
from nominatim.errors import UsageError
+from nominatim.data.place_info import PlaceInfo
+from nominatim.tokenizer.base import AbstractAnalyzer, AbstractTokenizer
LOG = logging.getLogger()
-
-def handle_tarfile_or_directory(data_dir):
- """ Handles tarfile or directory for importing tiger data
+class TigerInput:
+ """ Context manager that goes through Tiger input files which may
+ either be in a directory or gzipped together in a tar file.
"""
- tar = None
- if data_dir.endswith('.tar.gz'):
- try:
- tar = tarfile.open(data_dir)
- except tarfile.ReadError as err:
- LOG.fatal("Cannot open '%s'. Is this a tar file?", data_dir)
- raise UsageError("Cannot open Tiger data file.") from err
-
- csv_files = [i for i in tar.getmembers() if i.name.endswith('.csv')]
- LOG.warning("Found %d CSV files in tarfile with path %s", len(csv_files), data_dir)
- if not csv_files:
- LOG.warning("Tiger data import selected but no files in tarfile's path %s", data_dir)
- return None, None
- else:
- files = os.listdir(data_dir)
- csv_files = [os.path.join(data_dir, i) for i in files if i.endswith('.csv')]
- LOG.warning("Found %d CSV files in path %s", len(csv_files), data_dir)
- if not csv_files:
- LOG.warning("Tiger data import selected but no files found in path %s", data_dir)
- return None, None
-
- return csv_files, tar
-
-
-def handle_threaded_sql_statements(pool, fd, analyzer):
+ def __init__(self, data_dir: str) -> None:
+ self.tar_handle = None
+ self.files: List[Union[str, tarfile.TarInfo]] = []
+
+ if data_dir.endswith('.tar.gz'):
+ try:
+ self.tar_handle = tarfile.open(data_dir) # pylint: disable=consider-using-with
+ except tarfile.ReadError as err:
+ LOG.fatal("Cannot open '%s'. Is this a tar file?", data_dir)
+ raise UsageError("Cannot open Tiger data file.") from err
+
+ self.files = [i for i in self.tar_handle.getmembers() if i.name.endswith('.csv')]
+ LOG.warning("Found %d CSV files in tarfile with path %s", len(self.files), data_dir)
+ else:
+ files = os.listdir(data_dir)
+ self.files = [os.path.join(data_dir, i) for i in files if i.endswith('.csv')]
+ LOG.warning("Found %d CSV files in path %s", len(self.files), data_dir)
+
+ if not self.files:
+ LOG.warning("Tiger data import selected but no files found at %s", data_dir)
+
+
+ def __enter__(self) -> 'TigerInput':
+ return self
+
+
+ def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> None:
+ if self.tar_handle:
+ self.tar_handle.close()
+ self.tar_handle = None
+
+
+ def next_file(self) -> TextIO:
+ """ Return a file handle to the next file to be processed.
+ Raises an IndexError if there is no file left.
+ """
+ fname = self.files.pop(0)
+
+ if self.tar_handle is not None:
+ extracted = self.tar_handle.extractfile(fname)
+ assert extracted is not None
+ return io.TextIOWrapper(extracted)
+
+ return open(cast(str, fname), encoding='utf-8')
+
+
+ def __len__(self) -> int:
+ return len(self.files)
+
+
+def handle_threaded_sql_statements(pool: WorkerPool, fd: TextIO,
+ analyzer: AbstractAnalyzer) -> None:
""" Handles sql statement with multiplexing
"""
lines = 0
address = dict(street=row['street'], postcode=row['postcode'])
args = ('SRID=4326;' + row['geometry'],
int(row['from']), int(row['to']), row['interpolation'],
- psycopg2.extras.Json(analyzer.process_place(dict(address=address))),
+ Json(analyzer.process_place(PlaceInfo({'address': address}))),
analyzer.normalize_postcode(row['postcode']))
except ValueError:
continue
lines = 0
-def add_tiger_data(data_dir, config, threads, tokenizer):
+def add_tiger_data(data_dir: str, config: Configuration, threads: int,
+ tokenizer: AbstractTokenizer) -> None:
""" Import tiger data from directory or tar file `data dir`.
"""
dsn = config.get_libpq_dsn()
- files, tar = handle_tarfile_or_directory(data_dir)
-
- if not files:
- return
- with connect(dsn) as conn:
- sql = SQLPreprocessor(conn, config)
- sql.run_sql_file(conn, 'tiger_import_start.sql')
+ with TigerInput(data_dir) as tar:
+ if not tar:
+ return
- # Reading files and then for each file line handling
- # sql_query in <threads - 1> chunks.
- place_threads = max(1, threads - 1)
+ with connect(dsn) as conn:
+ sql = SQLPreprocessor(conn, config)
+ sql.run_sql_file(conn, 'tiger_import_start.sql')
- with WorkerPool(dsn, place_threads, ignore_sql_errors=True) as pool:
- with tokenizer.name_analyzer() as analyzer:
- for fname in files:
- if not tar:
- fd = open(fname)
- else:
- fd = io.TextIOWrapper(tar.extractfile(fname))
+ # Reading files and then for each file line handling
+ # sql_query in <threads - 1> chunks.
+ place_threads = max(1, threads - 1)
- handle_threaded_sql_statements(pool, fd, analyzer)
+ with WorkerPool(dsn, place_threads, ignore_sql_errors=True) as pool:
+ with tokenizer.name_analyzer() as analyzer:
+ while tar:
+ with tar.next_file() as fd:
+ handle_threaded_sql_statements(pool, fd, analyzer)
- fd.close()
+ print('\n')
- if tar:
- tar.close()
- print('\n')
LOG.warning("Creating indexes on Tiger data")
with connect(dsn) as conn:
sql = SQLPreprocessor(conn, config)
projects / nominatim.git / blobdiff