~abentley/bzrtools/bzrtools.dev

"""Import upstream source into a branch"""

from bz2 import BZ2File

import errno

import os

from StringIO import StringIO

import stat

import tarfile

import zipfile

from bzrlib import generate_ids

from bzrlib.bzrdir import BzrDir

from bzrlib.errors import NoSuchFile, BzrCommandError, NotBranchError

from bzrlib.osutils import (pathjoin, isdir, file_iterator, basename,

                            file_kind)

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

        self.mode = 0666

    def isdir(self):

        # Really? Eeeew!

        return bool(self.name.endswith('/'))

    def isreg(self):

        # Really? Eeeew!

        return not self.isdir()

class DirWrapper(object):

    def __init__(self, fileobj, mode='r'):

        assert mode == 'r', mode

        self.root = os.path.realpath(fileobj.read())

    def __repr__(self):

        return 'DirWrapper(%r)' % self.root

    def getmembers(self, subdir=None):

        if subdir is not None:

            mydir = pathjoin(self.root, subdir)

        else:

            mydir = self.root

        for child in os.listdir(mydir):

            if subdir is not None:

                child = pathjoin(subdir, child)

            fi = FileInfo(self.root, child)

            yield fi

            if fi.isdir():

                for v in self.getmembers(child):

                    yield v

    def extractfile(self, member):

        return open(member.fullpath)

class FileInfo(object):

    def __init__(self, root, filepath):

        self.fullpath = pathjoin(root, filepath)

        self.root = root

        if filepath != '':

            self.name = pathjoin(basename(root), filepath)

        else:

            print 'root %r' % root

            self.name = basename(root)

        self.type = None

        stat = os.lstat(self.fullpath)

        self.mode = stat.st_mode

        if self.isdir():

            self.name += '/'

    def __repr__(self):

        return 'FileInfo(%r)' % self.name

    def isreg(self):

        return stat.S_ISREG(self.mode)

    def isdir(self):

        return stat.S_ISDIR(self.mode)

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 name_top == '':

            return None

        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_dir(tree, dir_input):

    dir_file = DirWrapper(dir_input)

    import_archive(tree, dir_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:

            if tt.final_kind(trans_id) == 'file':

                tt.set_executability(None, trans_id)

            tt.cancel_creation(trans_id)

        seen.add(member.name)

        if member.isreg():

            tt.create_file(file_iterator(archive_file.extractfile(member)), 

                           trans_id)

            executable = (member.mode & 0111) != 0

            tt.set_executability(executable, trans_id)

        elif member.isdir():

            do_directory(tt, trans_id, tree, relative_path, path)

        elif member.issym():

            tt.create_symlink(member.linkname, trans_id)

        else:

            continue

        if tt.tree_file_id(trans_id) is None:

            name = basename(member.name.rstrip('/'))

            file_id = generate_ids.gen_file_id(name)

            tt.version_file(file_id, 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)

        if tt.tree_file_id(trans_id) is None:

            tt.version_file(trans_id, trans_id)

        added.add(relative_path)

    for path in removed.difference(added):

        tt.unversion_file(tt.trans_id_tree_path(path))

    for conflict in cook_conflicts(resolve_conflicts(tt), tt):

        warning(conflict)

    tt.apply()

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'))

        elif file_kind(source) == 'directory':

            s = StringIO(source)

            s.seek(0)

            import_dir(tree, s)

        else:

            raise BzrCommandError('Unhandled import source')

    finally:

        tree.unlock()