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"""Import upstream source into a branch"""
from bz2 import BZ2File
import errno
import os
from StringIO import StringIO
import tarfile
import zipfile
from bzrlib.bzrdir import BzrDir
from bzrlib.errors import NoSuchFile, BzrCommandError, NotBranchError
from bzrlib.osutils import pathjoin, isdir, file_iterator
from bzrlib.trace import warning
from bzrlib.transform import TreeTransform, resolve_conflicts, cook_conflicts
from bzrlib.workingtree import WorkingTree
class ZipFileWrapper(object):
def __init__(self, fileobj, mode):
self.zipfile = zipfile.ZipFile(fileobj, mode)
def getmembers(self):
for info in self.zipfile.infolist():
yield ZipInfoWrapper(self.zipfile, info)
def extractfile(self, infowrapper):
return StringIO(self.zipfile.read(infowrapper.name))
def add(self, filename):
if isdir(filename):
self.zipfile.writestr(filename+'/', '')
else:
self.zipfile.write(filename)
def close(self):
self.zipfile.close()
class ZipInfoWrapper(object):
def __init__(self, zipfile, info):
self.info = info
self.type = None
self.name = info.filename
self.zipfile = zipfile
def isdir(self):
# Really? Eeeew!
return bool(self.name.endswith('/'))
def isreg(self):
# Really? Eeeew!
return not self.isdir()
def top_directory(path):
"""Return the top directory given in a path."""
dirname = os.path.dirname(path)
last_dirname = dirname
while True:
dirname = os.path.dirname(dirname)
if dirname == '' or dirname == last_dirname:
return last_dirname
last_dirname = dirname
def common_directory(names):
"""Determine a single directory prefix from a list of names"""
possible_prefix = None
for name in names:
name_top = top_directory(name)
if possible_prefix is None:
possible_prefix = name_top
else:
if name_top != possible_prefix:
return None
return possible_prefix
def do_directory(tt, trans_id, tree, relative_path, path):
if isdir(path) and tree.path2id(relative_path) is not None:
tt.cancel_deletion(trans_id)
else:
tt.create_directory(trans_id)
def add_implied_parents(implied_parents, path):
"""Update the set of implied parents from a path"""
parent = os.path.dirname(path)
if parent in implied_parents:
return
implied_parents.add(parent)
add_implied_parents(implied_parents, parent)
def names_of_files(tar_file):
for member in tar_file.getmembers():
if member.type != "g":
yield member.name
def import_tar(tree, tar_input):
"""Replace the contents of a working directory with tarfile contents.
The tarfile may be a gzipped stream. File ids will be updated.
"""
tar_file = tarfile.open('lala', 'r', tar_input)
import_archive(tree, tar_file)
def import_zip(tree, zip_input):
zip_file = ZipFileWrapper(zip_input, 'r')
import_archive(tree, zip_file)
def import_archive(tree, archive_file):
prefix = common_directory(names_of_files(archive_file))
tt = TreeTransform(tree)
removed = set()
for path, entry in tree.inventory.iter_entries():
if entry.parent_id is None:
continue
trans_id = tt.trans_id_tree_path(path)
tt.delete_contents(trans_id)
removed.add(path)
added = set()
implied_parents = set()
seen = set()
for member in archive_file.getmembers():
if member.type == 'g':
# type 'g' is a header
continue
relative_path = member.name
if prefix is not None:
relative_path = relative_path[len(prefix)+1:]
if relative_path == '':
continue
add_implied_parents(implied_parents, relative_path)
trans_id = tt.trans_id_tree_path(relative_path)
added.add(relative_path.rstrip('/'))
path = tree.abspath(relative_path)
if member.name in seen:
tt.cancel_creation(trans_id)
seen.add(member.name)
if member.isreg():
tt.create_file(file_iterator(archive_file.extractfile(member)),
trans_id)
elif member.isdir():
do_directory(tt, trans_id, tree, relative_path, path)
elif member.issym():
tt.create_symlink(member.linkname, trans_id)
for relative_path in implied_parents.difference(added):
if relative_path == "":
continue
trans_id = tt.trans_id_tree_path(relative_path)
path = tree.abspath(relative_path)
do_directory(tt, trans_id, tree, relative_path, path)
added.add(relative_path)
for conflict in cook_conflicts(resolve_conflicts(tt), tt):
warning(conflict)
tt.apply()
update_ids(tree, added, removed)
def update_ids(tree, added, removed):
"""Make sure that all present files files have file_ids.
"""
# XXX detect renames
new = added.difference(removed)
deleted = removed.difference(added)
tree.add(sorted(new))
tree.remove(sorted(deleted, reverse=True))
def do_import(source, tree_directory=None):
"""Implementation of import command. Intended for UI only"""
if tree_directory is not None:
try:
tree = WorkingTree.open(tree_directory)
except NotBranchError:
if not os.path.exists(tree_directory):
os.mkdir(tree_directory)
branch = BzrDir.create_branch_convenience(tree_directory)
tree = branch.bzrdir.open_workingtree()
else:
tree = WorkingTree.open_containing('.')[0]
tree.lock_write()
try:
if tree.changes_from(tree.basis_tree()).has_changed():
raise BzrCommandError("Working tree has uncommitted changes.")
if (source.endswith('.tar') or source.endswith('.tar.gz') or
source.endswith('.tar.bz2')) or source.endswith('.tgz'):
try:
if source.endswith('.bz2'):
tar_input = BZ2File(source, 'r')
tar_input = StringIO(tar_input.read())
else:
tar_input = file(source, 'rb')
except IOError, e:
if e.errno == errno.ENOENT:
raise NoSuchFile(source)
try:
import_tar(tree, tar_input)
finally:
tar_input.close()
elif source.endswith('.zip'):
import_zip(tree, open(source, 'rb'))
else:
raise BzrCommandError('Unhandled import source')
finally:
tree.unlock()
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