api: generalize error handling

[nominatim.git] / nominatim / cli.py

diff --git a/nominatim/cli.py b/nominatim/cli.py
index 7459711f9b43dd1c8e370c209d14e6c38989fa6d..d34ef118ed9a48609c455616207d36387e006802 100644 (file)
--- a/nominatim/cli.py
+++ b/nominatim/cli.py
@@ -1,27 +1,35 @@
+# 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.

 """
 Command-line interface to the Nominatim functions for import, update,
 database administration and querying.
 """
 """
 Command-line interface to the Nominatim functions for import, update,
 database administration and querying.
 """

+from typing import Optional, Any, List, Union
+import importlib

 import logging
 import os
 import sys
 import argparse
 from pathlib import Path
 
 import logging
 import os
 import sys
 import argparse
 from pathlib import Path
 

-from .config import Configuration
-from .tools.exec_utils import run_legacy_script, run_php_server
-from .errors import UsageError
-from . import clicmd
-from .clicmd.args import NominatimArgs
+from nominatim.config import Configuration
+from nominatim.tools.exec_utils import run_legacy_script, run_php_server
+from nominatim.errors import UsageError
+from nominatim import clicmd
+from nominatim import version
+from nominatim.clicmd.args import NominatimArgs, Subcommand

 
 LOG = logging.getLogger()
 
 
 LOG = logging.getLogger()
 

-

 class CommandlineParser:
     """ Wraps some of the common functions for parsing the command line
         and setting up subcommands.
     """
 class CommandlineParser:
     """ Wraps some of the common functions for parsing the command line
         and setting up subcommands.
     """

-    def __init__(self, prog, description):
+    def __init__(self, prog: str, description: Optional[str]):

         self.parser = argparse.ArgumentParser(
             prog=prog,
             description=description,
         self.parser = argparse.ArgumentParser(
             prog=prog,
             description=description,


@@ -30,6 +38,10 @@ class CommandlineParser:
         self.subs = self.parser.add_subparsers(title='available commands',
                                                dest='subcommand')
 
         self.subs = self.parser.add_subparsers(title='available commands',
                                                dest='subcommand')
 

+        # Global arguments that only work if no sub-command given
+        self.parser.add_argument('--version', action='store_true',
+                                 help='Print Nominatim version and exit')
+

         # Arguments added to every sub-command
         self.default_args = argparse.ArgumentParser(add_help=False)
         group = self.default_args.add_argument_group('Default arguments')
         # Arguments added to every sub-command
         self.default_args = argparse.ArgumentParser(add_help=False)
         group = self.default_args.add_argument_group('Default arguments')


@@ -46,11 +58,22 @@ class CommandlineParser:
                            help='Number of parallel threads to use')
 
 
                            help='Number of parallel threads to use')
 
 

-    def add_subcommand(self, name, cmd):
+    def nominatim_version_text(self) -> str:
+        """ Program name and version number as string
+        """
+        text = f'Nominatim version {version.NOMINATIM_VERSION!s}'
+        if version.GIT_COMMIT_HASH is not None:
+            text += f' ({version.GIT_COMMIT_HASH})'
+        return text
+
+
+    def add_subcommand(self, name: str, cmd: Subcommand) -> None:

         """ Add a subcommand to the parser. The subcommand must be a class
             with a function add_args() that adds the parameters for the
             subcommand and a run() function that executes the command.
         """
         """ Add a subcommand to the parser. The subcommand must be a class
             with a function add_args() that adds the parameters for the
             subcommand and a run() function that executes the command.
         """

+        assert cmd.__doc__ is not None
+

         parser = self.subs.add_parser(name, parents=[self.default_args],
                                       help=cmd.__doc__.split('\n', 1)[0],
                                       description=cmd.__doc__,
         parser = self.subs.add_parser(name, parents=[self.default_args],
                                       help=cmd.__doc__.split('\n', 1)[0],
                                       description=cmd.__doc__,


@@ -59,20 +82,26 @@ class CommandlineParser:
         parser.set_defaults(command=cmd)
         cmd.add_args(parser)
 
         parser.set_defaults(command=cmd)
         cmd.add_args(parser)
 

-    def run(self, **kwargs):
+
+    def run(self, **kwargs: Any) -> int:

         """ Parse the command line arguments of the program and execute the
             appropriate subcommand.
         """
         args = NominatimArgs()
         """ Parse the command line arguments of the program and execute the
             appropriate subcommand.
         """
         args = NominatimArgs()

-        self.parser.parse_args(args=kwargs.get('cli_args'), namespace=args)
+        try:
+            self.parser.parse_args(args=kwargs.get('cli_args'), namespace=args)
+        except SystemExit:
+            return 1
+
+        if args.version:
+            print(self.nominatim_version_text())
+            return 0

 
         if args.subcommand is None:
             self.parser.print_help()
             return 1
 
 
         if args.subcommand is None:
             self.parser.print_help()
             return 1
 

-        for arg in ('module_dir', 'osm2pgsql_path', 'phplib_dir', 'sqllib_dir',
-                    'data_dir', 'config_dir', 'phpcgi_path'):
-            setattr(args, arg, Path(kwargs[arg]))
+        args.phpcgi_path = Path(kwargs['phpcgi_path'])

         args.project_dir = Path(args.project_dir).resolve()
 
         if 'cli_args' not in kwargs:
         args.project_dir = Path(args.project_dir).resolve()
 
         if 'cli_args' not in kwargs:


@@ -81,8 +110,10 @@ class CommandlineParser:
                                 datefmt='%Y-%m-%d %H:%M:%S',
                                 level=max(4 - args.verbose, 1) * 10)
 
                                 datefmt='%Y-%m-%d %H:%M:%S',
                                 level=max(4 - args.verbose, 1) * 10)
 

-        args.config = Configuration(args.project_dir, args.config_dir,
+        args.config = Configuration(args.project_dir,

                                     environ=kwargs.get('environ', os.environ))
                                     environ=kwargs.get('environ', os.environ))

+        args.config.set_libdirs(module=kwargs['module_dir'],
+                                osm2pgsql=kwargs['osm2pgsql_path'])

 
         log = logging.getLogger()
         log.warning('Using project directory: %s', str(args.project_dir))
 
         log = logging.getLogger()
         log.warning('Using project directory: %s', str(args.project_dir))


@@ -98,7 +129,7 @@ class CommandlineParser:
         return 1
 
 
         return 1
 
 

-##### Subcommand classes
+# Subcommand classes

 #
 # Each class needs to implement two functions: add_args() adds the CLI parameters
 # for the subfunction, run() executes the subcommand.
 #
 # Each class needs to implement two functions: add_args() adds the CLI parameters
 # for the subfunction, run() executes the subcommand.


@@ -109,89 +140,12 @@ class CommandlineParser:
 #
 # No need to document the functions each time.
 # pylint: disable=C0111
 #
 # No need to document the functions each time.
 # pylint: disable=C0111

-# Using non-top-level imports to make pyosmium optional for replication only.
-# pylint: disable=E0012,C0415
-
-
-class SetupSpecialPhrases:
-    """\
-    Maintain special phrases.
-    """
-
-    @staticmethod
-    def add_args(parser):
-        group = parser.add_argument_group('Input arguments')
-        group.add_argument('--from-wiki', action='store_true',
-                           help='Pull special phrases from the OSM wiki.')
-        group = parser.add_argument_group('Output arguments')
-        group.add_argument('-o', '--output', default='-',
-                           help="""File to write the preprocessed phrases to.
-                                   If omitted, it will be written to stdout.""")
-
-    @staticmethod
-    def run(args):
-        if args.output != '-':
-            raise NotImplementedError('Only output to stdout is currently implemented.')
-        return run_legacy_script('specialphrases.php', '--wiki-import', nominatim_env=args)
-
-
-class UpdateAddData:
-    """\
-    Add additional data from a file or an online source.
-
-    Data is only imported, not indexed. You need to call `nominatim-update index`
-    to complete the process.
-    """
-
-    @staticmethod
-    def add_args(parser):
-        group_name = parser.add_argument_group('Source')
-        group = group_name.add_mutually_exclusive_group(required=True)
-        group.add_argument('--file', metavar='FILE',
-                           help='Import data from an OSM file')
-        group.add_argument('--diff', metavar='FILE',
-                           help='Import data from an OSM diff file')
-        group.add_argument('--node', metavar='ID', type=int,
-                           help='Import a single node from the API')
-        group.add_argument('--way', metavar='ID', type=int,
-                           help='Import a single way from the API')
-        group.add_argument('--relation', metavar='ID', type=int,
-                           help='Import a single relation from the API')
-        group.add_argument('--tiger-data', metavar='DIR',
-                           help='Add housenumbers from the US TIGER census database.')
-        group = parser.add_argument_group('Extra arguments')
-        group.add_argument('--use-main-api', action='store_true',
-                           help='Use OSM API instead of Overpass to download objects')
-
-    @staticmethod
-    def run(args):
-        if args.tiger_data:
-            os.environ['NOMINATIM_TIGER_DATA_PATH'] = args.tiger_data
-            return run_legacy_script('setup.php', '--import-tiger-data', nominatim_env=args)
-
-        params = ['update.php']
-        if args.file:
-            params.extend(('--import-file', args.file))
-        elif args.diff:
-            params.extend(('--import-diff', args.diff))
-        elif args.node:
-            params.extend(('--import-node', args.node))
-        elif args.way:
-            params.extend(('--import-way', args.way))
-        elif args.relation:
-            params.extend(('--import-relation', args.relation))
-        if args.use_main_api:
-            params.append('--use-main-api')
-        return run_legacy_script(*params, nominatim_env=args)
-
-

 class QueryExport:
     """\
     Export addresses as CSV file from the database.
     """
 
 class QueryExport:
     """\
     Export addresses as CSV file from the database.
     """
 

-    @staticmethod
-    def add_args(parser):
+    def add_args(self, parser: argparse.ArgumentParser) -> None:

         group = parser.add_argument_group('Output arguments')
         group.add_argument('--output-type', default='street',
                            choices=('continent', 'country', 'state', 'county',
         group = parser.add_argument_group('Output arguments')
         group.add_argument('--output-type', default='street',
                            choices=('continent', 'country', 'state', 'county',


@@ -199,16 +153,16 @@ class QueryExport:
                            help='Type of places to output (default: street)')
         group.add_argument('--output-format',
                            default='street;suburb;city;county;state;country',
                            help='Type of places to output (default: street)')
         group.add_argument('--output-format',
                            default='street;suburb;city;county;state;country',

-                           help="""Semicolon-separated list of address types
-                                   (see --output-type). Multiple ranks can be
-                                   merged into one column by simply using a
-                                   comma-separated list.""")
+                           help=("Semicolon-separated list of address types "
+                                 "(see --output-type). Multiple ranks can be "
+                                 "merged into one column by simply using a "
+                                 "comma-separated list."))

         group.add_argument('--output-all-postcodes', action='store_true',
         group.add_argument('--output-all-postcodes', action='store_true',

-                           help="""List all postcodes for address instead of
-                                   just the most likely one""")
+                           help=("List all postcodes for address instead of "
+                                 "just the most likely one"))

         group.add_argument('--language',
         group.add_argument('--language',

-                           help="""Preferred language for output
-                                   (use local name, if omitted)""")
+                           help=("Preferred language for output "
+                                 "(use local name, if omitted)"))

         group = parser.add_argument_group('Filter arguments')
         group.add_argument('--restrict-to-country', metavar='COUNTRY_CODE',
                            help='Export only objects within country')
         group = parser.add_argument_group('Filter arguments')
         group.add_argument('--restrict-to-country', metavar='COUNTRY_CODE',
                            help='Export only objects within country')


@@ -220,11 +174,10 @@ class QueryExport:
                            help='Export only children of this OSM relation')
 
 
                            help='Export only children of this OSM relation')
 
 

-    @staticmethod
-    def run(args):
-        params = ['export.php',
-                  '--output-type', args.output_type,
-                  '--output-format', args.output_format]
+    def run(self, args: NominatimArgs) -> int:
+        params: List[Union[int, str]] = [
+                             '--output-type', args.output_type,
+                             '--output-format', args.output_format]

         if args.output_all_postcodes:
             params.append('--output-all-postcodes')
         if args.language:
         if args.output_all_postcodes:
             params.append('--output-all-postcodes')
         if args.language:


@@ -238,62 +191,105 @@ class QueryExport:
         if args.restrict_to_osm_relation:
             params.extend(('--restrict-to-osm-relation', args.restrict_to_osm_relation))
 
         if args.restrict_to_osm_relation:
             params.extend(('--restrict-to-osm-relation', args.restrict_to_osm_relation))
 

-        return run_legacy_script(*params, nominatim_env=args)
+        return run_legacy_script('export.php', *params, config=args.config)

 
 
 class AdminServe:
     """\
     Start a simple web server for serving the API.
 
 
 
 class AdminServe:
     """\
     Start a simple web server for serving the API.
 

-    This command starts the built-in PHP webserver to serve the website
+    This command starts a built-in webserver to serve the website

     from the current project directory. This webserver is only suitable
     from the current project directory. This webserver is only suitable

-    for testing and develop. Do not use it in production setups!
+    for testing and development. Do not use it in production setups!
+
+    There are different webservers available. The default 'php' engine
+    runs the classic PHP frontend. The other engines are Python servers
+    which run the new Python frontend code. This is highly experimental
+    at the moment and may not include the full API.

 
     By the default, the webserver can be accessed at: http://127.0.0.1:8088
     """
 
 
     By the default, the webserver can be accessed at: http://127.0.0.1:8088
     """
 

-    @staticmethod
-    def add_args(parser):
+    def add_args(self, parser: argparse.ArgumentParser) -> None:

         group = parser.add_argument_group('Server arguments')
         group.add_argument('--server', default='127.0.0.1:8088',
                            help='The address the server will listen to.')
         group = parser.add_argument_group('Server arguments')
         group.add_argument('--server', default='127.0.0.1:8088',
                            help='The address the server will listen to.')

+        group.add_argument('--engine', default='php',
+                           choices=('php', 'sanic', 'falcon', 'starlette'),
+                           help='Webserver framework to run. (default: php)')
+
+
+    def run(self, args: NominatimArgs) -> int:
+        if args.engine == 'php':
+            run_php_server(args.server, args.project_dir / 'website')
+        else:
+            server_info = args.server.split(':', 1)
+            host = server_info[0]
+            if len(server_info) > 1:
+                if not server_info[1].isdigit():
+                    raise UsageError('Invalid format for --server parameter. Use <host>:<port>')
+                port = int(server_info[1])
+            else:
+                port = 8088
+
+            if args.engine == 'sanic':
+                server_module = importlib.import_module('nominatim.server.sanic.server')
+
+                app = server_module.get_application(args.project_dir)
+                app.run(host=host, port=port, debug=True, single_process=True)
+            else:
+                import uvicorn # pylint: disable=import-outside-toplevel

 
 

-    @staticmethod
-    def run(args):
-        run_php_server(args.server, args.project_dir / 'website')
+                if args.engine == 'falcon':
+                    server_module = importlib.import_module('nominatim.server.falcon.server')
+                elif args.engine == 'starlette':
+                    server_module = importlib.import_module('nominatim.server.starlette.server')

 
 

+                app = server_module.get_application(args.project_dir)
+                uvicorn.run(app, host=host, port=port)

 
 

-def nominatim(**kwargs):
+        return 0
+
+
+def get_set_parser(**kwargs: Any) -> CommandlineParser:

     """\
     """\

-    Command-line tools for importing, updating, administrating and
-    querying the Nominatim database.
+    Initializes the parser and adds various subcommands for
+    nominatim cli.

     """
     parser = CommandlineParser('nominatim', nominatim.__doc__)
 
     """
     parser = CommandlineParser('nominatim', nominatim.__doc__)
 

-    parser.add_subcommand('import', clicmd.SetupAll)
-    parser.add_subcommand('freeze', clicmd.SetupFreeze)
-    parser.add_subcommand('replication', clicmd.UpdateReplication)
+    parser.add_subcommand('import', clicmd.SetupAll())
+    parser.add_subcommand('freeze', clicmd.SetupFreeze())
+    parser.add_subcommand('replication', clicmd.UpdateReplication())

 
 

-    parser.add_subcommand('special-phrases', SetupSpecialPhrases)
+    parser.add_subcommand('special-phrases', clicmd.ImportSpecialPhrases())

 
 

-    parser.add_subcommand('add-data', UpdateAddData)
-    parser.add_subcommand('index', clicmd.UpdateIndex)
-    parser.add_subcommand('refresh', clicmd.UpdateRefresh)
+    parser.add_subcommand('add-data', clicmd.UpdateAddData())
+    parser.add_subcommand('index', clicmd.UpdateIndex())
+    parser.add_subcommand('refresh', clicmd.UpdateRefresh())

 
 

-    parser.add_subcommand('admin', clicmd.AdminFuncs)
+    parser.add_subcommand('admin', clicmd.AdminFuncs())

 
 

-    parser.add_subcommand('export', QueryExport)
-    parser.add_subcommand('serve', AdminServe)
+    parser.add_subcommand('export', QueryExport())
+    parser.add_subcommand('serve', AdminServe())

 
     if kwargs.get('phpcgi_path'):
 
     if kwargs.get('phpcgi_path'):

-        parser.add_subcommand('search', clicmd.APISearch)
-        parser.add_subcommand('reverse', clicmd.APIReverse)
-        parser.add_subcommand('lookup', clicmd.APILookup)
-        parser.add_subcommand('details', clicmd.APIDetails)
-        parser.add_subcommand('status', clicmd.APIStatus)
+        parser.add_subcommand('search', clicmd.APISearch())
+        parser.add_subcommand('reverse', clicmd.APIReverse())
+        parser.add_subcommand('lookup', clicmd.APILookup())
+        parser.add_subcommand('details', clicmd.APIDetails())
+        parser.add_subcommand('status', clicmd.APIStatus())

     else:
         parser.parser.epilog = 'php-cgi not found. Query commands not available.'
 
     else:
         parser.parser.epilog = 'php-cgi not found. Query commands not available.'
 

-    parser.add_subcommand('transition', clicmd.AdminTransition)
+    return parser
+
+
+def nominatim(**kwargs: Any) -> int:
+    """\
+    Command-line tools for importing, updating, administrating and
+    querying the Nominatim database.
+    """
+    parser = get_set_parser(**kwargs)

 
     return parser.run(**kwargs)
 
     return parser.run(**kwargs)