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#! /usr/bin/python
# Copyright 2013 Canonical Ltd.
# Author: Colin Watson <cjwatson@ubuntu.com>
# 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; version 3 of the License.
#
# 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, see <http://www.gnu.org/licenses/>.
"""Manage build chroots."""
from __future__ import print_function
__metaclass__ = type
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
from contextlib import contextmanager
import fcntl
import hashlib
from optparse import OptionParser
import os
import struct
import subprocess
import sys
import termios
from launchpadlib.launchpad import Launchpad
from ubuntutools.question import YesNoQuestion
import lputils
if sys.version < "3.3":
def get_terminal_size(fd=sys.stdout.fileno()):
lines, columns = struct.unpack(
"HH", fcntl.ioctl(fd, termios.TIOCGWINSZ, "xxxx"))
# Switch order to match 3.3's os.get_terminal_size.
return columns, lines
else:
get_terminal_size = os.get_terminal_size
class ProgressStringIO(StringIO):
"""A strange object: a StringIO which manages a progress bar on read.
This is here to fool httplib into thinking it has a file object, and
thus sending data in chunks.
"""
def __init__(self, s):
StringIO.__init__(self, s)
self._length = len(s)
self._progress_width = get_terminal_size()[0] - 3
self._progress_offset = 0
self._progress_pos = -1
def __len__(self):
return self._length
def read(self, size):
pos = int(
float(self._progress_offset) * self._progress_width / self._length)
pos = min(pos, self._progress_width - 1)
if pos != self._progress_pos:
print(
"\r[%s>%s]" % (
"=" * pos, " " * (self._progress_width - pos - 1)),
end="")
sys.stdout.flush()
self._progress_pos = pos
r = StringIO.read(self, size)
self._progress_offset += len(r)
return r
class ProgressBrowser:
def __init__(self, child_browser):
# Be careful; this class overrides __setattr__.
self.__dict__["child_browser"] = child_browser
def _request(self, url, data=None, *args, **kwargs):
if data is not None:
new_data = ProgressStringIO(data)
else:
new_data = data
ret = self.child_browser._request(url, new_data, *args, **kwargs)
if data is not None:
print()
return ret
def __getattr__(self, name):
return getattr(self.child_browser, name)
def __setattr__(self, name, value):
setattr(self.child_browser, name, value)
def __delattr__(self, name):
delattr(self.child_browser, name)
@contextmanager
def patch_browser(launchpad):
# TODO: This pokes about in private attributes, and thus might break.
# Unfortunately, I don't see a way to do this more neatly: we can't just
# pass a file object to the resource method in the normal way, since
# email.generator.Generator._handle_text falls over. I think we need to
# fix lazr.restfulclient/wadllib in order to improve this.
original_browser = launchpad._browser
try:
launchpad._browser = ProgressBrowser(launchpad._browser)
yield
finally:
launchpad._browser = original_browser
def get_chroot(options):
das = options.architectures[0]
url = das.chroot_url
if url is None:
print("No chroot for %s" % das)
return 1
if options.dry_run:
print("Would fetch %s" % url)
else:
# We use wget here to save on having to implement a progress bar
# with urlretrieve.
command = ["wget"]
if options.filepath is not None:
command.extend(["-O", options.filepath])
command.append(url)
subprocess.check_call(command)
return 0
def info_chroot(options):
das = options.architectures[0]
url = das.chroot_url
if url is not None:
print(das.chroot_url)
return 0
def remove_chroot(options):
das = options.architectures[0]
if das.chroot_url is not None:
print("Previous chroot: %s" % das.chroot_url)
if options.dry_run:
print("Would remove chroot from %s" % das)
else:
if not options.confirm_all:
if YesNoQuestion().ask(
"Remove chroot from %s" % das, "no") == "no":
return 0
das.removeChroot()
return 0
def set_chroot(options):
das = options.architectures[0]
if das.chroot_url is not None:
print("Previous chroot: %s" % das.chroot_url)
if options.dry_run:
print("Would set chroot for %s to %s" % (das, options.filepath))
else:
if not options.confirm_all:
if YesNoQuestion().ask(
"Set chroot for %s to %s" % (das, options.filepath),
"no") == "no":
return 0
with open(options.filepath, "rb") as f:
data = f.read()
sha1sum = hashlib.sha1(data).hexdigest()
with patch_browser(options.launchpad):
das.setChroot(data=data, sha1sum=sha1sum)
return 0
commands = {
"get": get_chroot,
"info": info_chroot,
"remove": remove_chroot,
"set": set_chroot}
def main():
parser = OptionParser(
usage="usage: %prog -a ARCHITECTURE [options] <get|remove|set>")
parser.add_option(
"-l", "--launchpad", dest="launchpad_instance", default="production")
parser.add_option(
"-n", "--dry-run", default=False, action="store_true",
help="only show removals that would be performed")
parser.add_option(
"-y", "--confirm-all", default=False, action="store_true",
help="do not ask for confirmation")
parser.add_option(
"-d", "--distribution", default="ubuntu",
metavar="DISTRIBUTION", help="manage chroots for DISTRIBUTION")
parser.add_option(
"-s", "--series", dest="suite", metavar="SERIES",
help="manage chroots for SERIES")
parser.add_option(
"-a", "--architecture", metavar="ARCHITECTURE",
help="manage chroots for ARCHITECTURE")
parser.add_option(
"-f", "--filepath", metavar="PATH", help="Chroot file path")
options, args = parser.parse_args()
if options.architecture is None:
parser.error("You must specify an architecture.")
if not args:
parser.error(
"You must specify a command (%s)." % ", ".join(sorted(commands)))
command = args[0]
if command not in commands:
parser.error(
"Unrecognised command: %s (valid: %s)" %
(command, ", ".join(sorted(commands))))
if command == "set" and options.filepath is None:
parser.error("The set command requires a chroot file path (-f).")
options.launchpad = Launchpad.login_with(
"manage-chroot", options.launchpad_instance, version="devel")
lputils.setup_location(options)
return commands[command](options)
if __name__ == '__main__':
sys.exit(main())
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