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# Copyright (C) 2006-2010 Canonical Ltd
# Copyright (C) 2018 Breezy Developers
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""UI location string handling."""
import re
from . import (
urlutils,
)
from .hooks import Hooks
class LocationHooks(Hooks):
"""Dictionary mapping hook name to a list of callables for location hooks.
"""
def __init__(self):
Hooks.__init__(self, "breezy.location", "hooks")
self.add_hook(
'rewrite_url',
"Possibly rewrite a URL. Called with a URL to rewrite and the "
"purpose of the URL.", (3, 0))
hooks = LocationHooks()
def parse_rcp_location(location):
"""Convert a rcp-style location to a URL.
:param location: Location to convert, e.g. "foo:bar"
:param scheme: URL scheme to return, defaults to "ssh"
:return: A URL, e.g. "ssh://foo/bar"
:raises ValueError: if this is not a RCP-style URL
"""
m = re.match('^(?P<user>[^@:/]+@)?(?P<host>[^/:]+):(?P<path>.*)$', location)
if not m:
raise ValueError("Not a RCP URL")
if m.group('path').startswith('//'):
raise ValueError("Not a RCP URL: already looks like a URL")
return (m.group('host'),
m.group('user')[:-1] if m.group('user') else None,
m.group('path'))
def rcp_location_to_url(location, scheme='ssh'):
"""Convert a rcp-style location to a URL.
:param location: Location to convert, e.g. "foo:bar"
:param scheme: URL scheme to return, defaults to "ssh"
:return: A URL, e.g. "ssh://foo/bar"
:raises ValueError: if this is not a RCP-style URL
"""
(host, user, path) = parse_rcp_location(location)
quoted_user = urlutils.quote(user) if user else None
url = urlutils.URL(
scheme=scheme, quoted_user=quoted_user,
port=None, quoted_password=None,
quoted_host=urlutils.quote(host),
quoted_path=urlutils.quote(path))
return str(url)
def parse_cvs_location(location):
parts = location.split(':')
if parts[0] or parts[1] not in ('pserver', 'ssh', 'extssh'):
raise ValueError('not a valid CVS location string')
try:
(username, hostname) = parts[2].split('@', 1)
except IndexError:
hostname = parts[2]
username = None
scheme = parts[1]
if scheme == 'extssh':
scheme = 'ssh'
path = parts[3]
return (scheme, hostname, username, path)
def cvs_to_url(location):
"""Convert a CVS pserver location string to a URL.
:param location: pserver URL
:return: A cvs+pserver URL
"""
(scheme, host, user, path) = parse_cvs_location(location)
return str(urlutils.URL(
scheme='cvs+' + scheme,
quoted_user=urlutils.quote(user) if user else None,
quoted_host=urlutils.quote(host),
quoted_password=None,
port=None,
quoted_path=urlutils.quote(path)))
def location_to_url(location, purpose=None):
"""Determine a fully qualified URL from a location string.
This will try to interpret location as both a URL and a directory path. It
will also lookup the location in directories.
:param location: Unicode or byte string object with a location
:param purpose: Intended method of access (None, 'read' or 'write')
:raise InvalidURL: If the location is already a URL, but not valid.
:return: Byte string with resulting URL
"""
if not isinstance(location, str):
raise AssertionError("location not a byte or unicode string")
if location.startswith(':pserver:') or location.startswith(':extssh:'):
return cvs_to_url(location)
from .directory_service import directories
location = directories.dereference(location, purpose)
# Catch any URLs which are passing Unicode rather than ASCII
try:
location = location.encode('ascii')
except UnicodeError:
if urlutils.is_url(location):
raise urlutils.InvalidURL(
path=location, extra='URLs must be properly escaped')
location = urlutils.local_path_to_url(location)
else:
location = location.decode('ascii')
if location.startswith("file:") and not location.startswith("file://"):
return urlutils.join(urlutils.local_path_to_url("."), location[5:])
try:
url = rcp_location_to_url(location, scheme="ssh")
except ValueError:
pass
else:
return url
if not urlutils.is_url(location):
return urlutils.local_path_to_url(location)
for hook in hooks['rewrite_url']:
location = hook(location, purpose=purpose)
return location
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