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# Copyright 2014 Canonical Ltd. All rights reserved.
import os
import re
import sys
import errno
import hashlib
import subprocess
import optparse
import urllib
from os import curdir
from bzrlib.branch import Branch
from bzrlib.plugin import load_plugins
load_plugins()
from bzrlib.plugins.launchpad import account as lp_account
if 'GlobalConfig' in dir(lp_account):
from bzrlib.config import LocationConfig as LocationConfiguration
_ = LocationConfiguration
else:
from bzrlib.config import LocationStack as LocationConfiguration
_ = LocationConfiguration
def get_ubunet_branch_config(config_file):
"""
Retrieves the sourcedeps configuration for an ubunet source dir.
Returns a dict of (branch, revspec) tuples, keyed by branch name.
"""
branches = {}
with open(config_file, 'r') as stream:
for line in stream:
line = line.split('#')[0].strip()
match = re.match(r'(\S+)\s+'
'bzr\+ssh://([^/]+)/([^;]+)'
'(?:;revno=(\d+))?', line)
if match:
name, host, branch, revno = match.group(1, 2, 3, 4)
if revno is None:
revspec = "-1"
else:
revspec = revno
branches[name] = (host, branch, revspec)
return branches
def main(config_file, parent_dir, target_dir, verbose):
"""Do the deed."""
try:
os.makedirs(parent_dir)
except OSError, e:
if e.errno != errno.EEXIST:
raise
bzr_config = LocationConfiguration(parent_dir)
get_lp_login = lp_account.get_lp_login
username = get_lp_login(bzr_config) or get_lp_login()
if username is None:
raise RuntimeError("Unable to determine launchpad login")
quoted_username = urllib.quote(username)
branches = sorted(get_ubunet_branch_config(config_file).iteritems())
for branch_name, (host, quoted_branch_spec, revspec) in branches:
revno = int(revspec)
# qualify mirror branch name with hash of remote repo path to deal
# with changes to the remote branch URL over time
branch_spec_digest = hashlib.sha1(quoted_branch_spec).hexdigest()
branch_directory = branch_spec_digest
source_path = os.path.join(parent_dir, branch_directory)
destination_path = os.path.join(target_dir, branch_name)
# Remove leftover symlinks/stray files.
try:
os.remove(destination_path)
except OSError, e:
if e.errno != errno.EISDIR and e.errno != errno.ENOENT:
raise
branch_url = ("bzr+ssh://%s@%s/%s" %
(quoted_username, host, quoted_branch_spec))
lp_url = "lp:" + quoted_branch_spec.replace("+branch/", "")
# Create the local mirror branch if it doesn't already exist
if verbose:
sys.stderr.write('%30s: ' % (branch_name,))
sys.stderr.flush()
fresh = False
if not os.path.exists(source_path):
subprocess.check_call(['bzr', 'branch', '-q',
'--', branch_url, source_path])
fresh = True
source_branch = Branch.open(source_path)
# Freshen the source branch if required (-1 means we want tip).
if not fresh and (revno == -1 or revno > source_branch.revno()):
subprocess.check_call(['bzr', 'pull', '-q', '--overwrite', '-r',
str(revno), '-d', source_path,
'--', branch_url])
if os.path.exists(destination_path):
# Overwrite the destination with the appropriate revision.
subprocess.check_call(['bzr', 'clean-tree', '--force', '-q',
'--ignored', '-d', destination_path])
subprocess.check_call(['bzr', 'pull', '-q', '--overwrite',
'-r', str(revno),
'-d', destination_path, '--', source_path])
else:
# Create a new branch.
subprocess.check_call(['bzr', 'branch', '-q', '--hardlink',
'-r', str(revno),
'--', source_path, destination_path])
# Check the state of the destination branch.
destination_branch = Branch.open(destination_path)
destination_revno = destination_branch.revno()
if verbose:
sys.stderr.write('checked out %4s of %s\n' %
("r" + str(destination_revno), lp_url))
sys.stderr.flush()
if revno != -1 and destination_revno != revno:
raise RuntimeError("Expected revno %d but got revno %d" %
(revno, destination_revno))
if __name__ == '__main__':
parser = optparse.OptionParser(
usage="%prog [options]",
description=(
"Add a lightweight checkout in <target> for each "
"corresponding file in <parent>."),
add_help_option=False)
parser.add_option(
'-p', '--parent', dest='parent', default=None,
help=("The directory of the parent tree."),
metavar="DIR")
parser.add_option(
'-t', '--target', dest='target', default=curdir,
help=("The directory of the target tree."),
metavar="DIR")
parser.add_option(
'-c', '--config', dest='config', default=None,
help=("The config file to be used for config-manager."),
metavar="DIR")
parser.add_option(
'-q', '--quiet', dest='verbose', action='store_false',
help="Be less verbose.")
parser.add_option(
'-h', '--help', action='help',
help="Show this help message and exit.")
parser.set_defaults(verbose=True)
options, args = parser.parse_args()
if options.parent is None:
parser.error(
"Parent directory not specified.")
if options.target is None:
parser.error(
"Target directory not specified.")
sys.exit(main(config_file=options.config,
parent_dir=options.parent,
target_dir=options.target,
verbose=options.verbose))
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