~bzr-pqm/bzr/bzr.dev

# (C) 2005 Canonical Ltd

# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from errors import BzrError

from inventory import InventoryEntry, Inventory

START_MARK = "# bzr inventory format 3\n"

END_MARK = "# end of inventory\n"

def escape(s):

    """Very simple URL-like escaping.

    (Why not just use backslashes?  Because then we couldn't parse

    lines just by splitting on spaces.)"""

    return (s.replace('\\', r'\x5c')

            .replace(' ', r'\x20')

            .replace('\t', r'\x09')

            .replace('\n', r'\x0a'))

def unescape(s):

    assert s.find(' ') == -1

    s = (s.replace(r'\x20', ' ')

         .replace(r'\x09', '\t')

         .replace(r'\x0a', '\n')

         .replace(r'\x5c', '\\'))

    # TODO: What if there's anything else?

    return s

def write_text_inventory(inv, outf):

    """Write out inv in a simple trad-unix text format."""

    outf.write(START_MARK)

    for path, ie in inv.iter_entries():

        if ie.kind == 'root_directory':

            continue

        outf.write(ie.file_id + ' ')

        outf.write(escape(ie.name) + ' ')

        outf.write(ie.kind + ' ')

        outf.write(ie.parent_id + ' ')

        if ie.kind == 'file':

            outf.write(ie.text_id)

            outf.write(' ' + ie.text_sha1)

            outf.write(' ' + str(ie.text_size))

        outf.write("\n")

    outf.write(END_MARK)

def read_text_inventory(tf):

    """Return an inventory read in from tf"""

    if tf.readline() != START_MARK:

        raise BzrError("missing start mark")

    inv = Inventory()

    for l in tf:

        fields = l.split(' ')

        if fields[0] == '#':

            break

        ie = {'file_id': fields[0],

              'name': unescape(fields[1]),

              'kind': fields[2],

              'parent_id': fields[3]}

        ##inv.add(ie)

    if l != END_MARK:

        raise BzrError("missing end mark")

    return inv