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- Committer: Martin Pool
- Date: 2005-07-04 08:06:51 UTC
- Revision ID: mbp@sourcefrog.net-20050704080651-6ecec49164359e48
- track pending-merges
- unit tests for this
- unit tests for this
- files added:
- .rsyncexclude
- bzrlib/selftest
- contrib
- contrib/bash
- contrib/zsh
- effbot
- effbot/org
- elementtree
- patches
- plugins
- plugins/changeset
- plugins/rsync
- urlgrabber
- files removed:
- bzrlib/tests.py
- files modified:
- .bzrignore
added
removed
bzrlib/inventory.py
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#! /usr/bin/env python
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# -*- coding: UTF-8 -*-
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# (C) 2005 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Inventories map files to their name in a revision."""
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__copyright__ = "Copyright (C) 2005 Canonical Ltd."
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__author__ = "Martin Pool <mbp@canonical.com>"
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import sys, os.path, types
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from sets import Set
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try:
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from cElementTree import Element, ElementTree, SubElement
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except ImportError:
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from elementtree.ElementTree import Element, ElementTree, SubElement
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from xml import XMLMixin
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from errors import bailout
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from osutils import uuid, quotefn, splitpath, joinpath, appendpath
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from trace import mutter
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class InventoryEntry(XMLMixin):
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# This should really be an id randomly assigned when the tree is
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# created, but it's not for now.
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ROOT_ID = "TREE_ROOT"
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import sys, os.path, types, re
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import bzrlib
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from bzrlib.errors import BzrError, BzrCheckError
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from bzrlib.osutils import uuid, quotefn, splitpath, joinpath, appendpath
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from bzrlib.trace import mutter
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class InventoryEntry(object):
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"""Description of a versioned file.
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An InventoryEntry has the following fields, which are also
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>>> i = Inventory()
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>>> i.path2id('')
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>>> i.add(InventoryEntry('123', 'src', kind='directory'))
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>>> i.add(InventoryEntry('2323', 'hello.c', parent_id='123'))
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'TREE_ROOT'
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>>> i.add(InventoryEntry('123', 'src', 'directory', ROOT_ID))
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>>> i.add(InventoryEntry('2323', 'hello.c', 'file', parent_id='123'))
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>>> for j in i.iter_entries():
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... print j
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...
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('src', InventoryEntry('123', 'src', kind='directory', parent_id=None))
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('src', InventoryEntry('123', 'src', kind='directory', parent_id='TREE_ROOT'))
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('src/hello.c', InventoryEntry('2323', 'hello.c', kind='file', parent_id='123'))
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>>> i.add(InventoryEntry('2323', 'bye.c', parent_id='123'))
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>>> i.add(InventoryEntry('2323', 'bye.c', 'file', '123'))
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Traceback (most recent call last):
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...
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BzrError: ('inventory already contains entry with id {2323}', [])
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>>> i.add(InventoryEntry('2324', 'bye.c', parent_id='123'))
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>>> i.add(InventoryEntry('2325', 'wibble', parent_id='123', kind='directory'))
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BzrError: inventory already contains entry with id {2323}
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>>> i.add(InventoryEntry('2324', 'bye.c', 'file', '123'))
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>>> i.add(InventoryEntry('2325', 'wibble', 'directory', '123'))
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>>> i.path2id('src/wibble')
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'2325'
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>>> '2325' in i
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True
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>>> i.add(InventoryEntry('2326', 'wibble.c', parent_id='2325'))
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>>> i.add(InventoryEntry('2326', 'wibble.c', 'file', '2325'))
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>>> i['2326']
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InventoryEntry('2326', 'wibble.c', kind='file', parent_id='2325')
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>>> for j in i.iter_entries():
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>>> i.id2path('2326')
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'src/wibble/wibble.c'
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:todo: Maybe also keep the full path of the entry, and the children?
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TODO: Maybe also keep the full path of the entry, and the children?
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But those depend on its position within a particular inventory, and
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it would be nice not to need to hold the backpointer here.
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"""
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def __init__(self, file_id, name, kind='file', text_id=None,
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parent_id=None):
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# TODO: split InventoryEntry into subclasses for files,
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# directories, etc etc.
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text_sha1 = None
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text_size = None
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def __init__(self, file_id, name, kind, parent_id, text_id=None):
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"""Create an InventoryEntry
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The filename must be a single component, relative to the
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parent directory; it cannot be a whole path or relative name.
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>>> e = InventoryEntry('123', 'hello.c')
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>>> e = InventoryEntry('123', 'hello.c', 'file', ROOT_ID)
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>>> e.name
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'hello.c'
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>>> e.file_id
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'123'
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>>> e = InventoryEntry('123', 'src/hello.c')
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>>> e = InventoryEntry('123', 'src/hello.c', 'file', ROOT_ID)
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Traceback (most recent call last):
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BzrError: ("InventoryEntry name is not a simple filename: 'src/hello.c'", [])
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BzrCheckError: InventoryEntry name 'src/hello.c' is invalid
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"""
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if len(splitpath(name)) != 1:
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bailout('InventoryEntry name is not a simple filename: %r'
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% name)
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if '/' in name or '\\' in name:
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raise BzrCheckError('InventoryEntry name %r is invalid' % name)
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self.file_id = file_id
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self.name = name
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assert kind in ['file', 'directory']
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self.kind = kind
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self.text_id = text_id
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self.parent_id = parent_id
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self.text_sha1 = None
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self.text_size = None
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if kind == 'directory':
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self.children = {}
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elif kind == 'file':
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pass
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else:
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raise BzrError("unhandled entry kind %r" % kind)
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def sorted_children(self):
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l = self.children.items()
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l.sort()
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return l
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def copy(self):
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other = InventoryEntry(self.file_id, self.name, self.kind,
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self.text_id, self.parent_id)
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self.parent_id, text_id=self.text_id)
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other.text_sha1 = self.text_sha1
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other.text_size = self.text_size
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# note that children are *not* copied; they're pulled across when
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# others are added
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return other
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def to_element(self):
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"""Convert to XML element"""
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from bzrlib.xml import Element
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e = Element('entry')
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e.set('name', self.name)
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e.set('file_id', self.file_id)
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e.set('kind', self.kind)
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if self.text_size is not None:
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if self.text_size != None:
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e.set('text_size', '%d' % self.text_size)
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for f in ['text_id', 'text_sha1', 'parent_id']:
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for f in ['text_id', 'text_sha1']:
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v = getattr(self, f)
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if v is not None:
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if v != None:
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e.set(f, v)
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# to be conservative, we don't externalize the root pointers
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# for now, leaving them as null in the xml form. in a future
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# version it will be implied by nested elements.
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if self.parent_id != ROOT_ID:
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assert isinstance(self.parent_id, basestring)
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e.set('parent_id', self.parent_id)
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e.tail = '\n'
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return e
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def from_element(cls, elt):
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assert elt.tag == 'entry'
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self = cls(elt.get('file_id'), elt.get('name'), elt.get('kind'))
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## original format inventories don't have a parent_id for
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## nodes in the root directory, but it's cleaner to use one
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## internally.
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parent_id = elt.get('parent_id')
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if parent_id == None:
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parent_id = ROOT_ID
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self = cls(elt.get('file_id'), elt.get('name'), elt.get('kind'), parent_id)
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self.text_id = elt.get('text_id')
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self.text_sha1 = elt.get('text_sha1')
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self.parent_id = elt.get('parent_id')
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## mutter("read inventoryentry: %r" % (elt.attrib))
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from_element = classmethod(from_element)
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def __cmp__(self, other):
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if self is other:
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return 0
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def __eq__(self, other):
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if not isinstance(other, InventoryEntry):
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return NotImplemented
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return cmp(self.file_id, other.file_id) \
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or cmp(self.name, other.name) \
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or cmp(self.text_sha1, other.text_sha1) \
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or cmp(self.text_size, other.text_size) \
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or cmp(self.text_id, other.text_id) \
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or cmp(self.parent_id, other.parent_id) \
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or cmp(self.kind, other.kind)
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class Inventory(XMLMixin):
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return (self.file_id == other.file_id) \
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and (self.name == other.name) \
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and (self.text_sha1 == other.text_sha1) \
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and (self.text_size == other.text_size) \
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and (self.text_id == other.text_id) \
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and (self.parent_id == other.parent_id) \
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and (self.kind == other.kind)
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def __ne__(self, other):
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return not (self == other)
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def __hash__(self):
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raise ValueError('not hashable')
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class RootEntry(InventoryEntry):
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def __init__(self, file_id):
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self.file_id = file_id
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self.children = {}
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self.kind = 'root_directory'
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self.parent_id = None
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self.name = ''
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def __eq__(self, other):
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if not isinstance(other, RootEntry):
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return NotImplemented
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return (self.file_id == other.file_id) \
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and (self.children == other.children)
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class Inventory(object):
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"""Inventory of versioned files in a tree.
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An Inventory acts like a set of InventoryEntry items. You can
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also look files up by their file_id or name.
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May be read from and written to a metadata file in a tree. To
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manipulate the inventory (for example to add a file), it is read
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in, modified, and then written back out.
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This describes which file_id is present at each point in the tree,
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and possibly the SHA-1 or other information about the file.
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Entries can be looked up either by path or by file_id.
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The inventory represents a typical unix file tree, with
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directories containing files and subdirectories. We never store
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returned quickly.
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InventoryEntry objects must not be modified after they are
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inserted.
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inserted, other than through the Inventory API.
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>>> inv = Inventory()
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>>> inv.write_xml(sys.stdout)
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<inventory>
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</inventory>
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>>> inv.add(InventoryEntry('123-123', 'hello.c'))
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>>> inv.add(InventoryEntry('123-123', 'hello.c', 'file', ROOT_ID))
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>>> inv['123-123'].name
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'hello.c'
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>>> for file_id in inv: print file_id
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...
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123-123
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May be treated as an iterator or set to look up file ids:
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>>> [x[0] for x in inv.iter_entries()]
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['hello.c']
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>>> inv.write_xml(sys.stdout)
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<inventory>
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<entry file_id="123-123" kind="file" name="hello.c" />
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</inventory>
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"""
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## TODO: Clear up handling of files in subdirectories; we probably
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## do want to be able to just look them up by name but this
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## probably means gradually walking down the path, looking up as we go.
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## TODO: Make sure only canonical filenames are stored.
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## TODO: Do something sensible about the possible collisions on
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## case-losing filesystems. Perhaps we should just always forbid
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## such collisions.
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## _tree should probably just be stored as
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## InventoryEntry._children on each directory.
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def __init__(self):
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"""Create or read an inventory.
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If a working directory is specified, the inventory is read
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from there. If the file is specified, read from that. If not,
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the inventory is created empty.
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The inventory is created with a default root directory, with
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an id of None.
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"""
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self._byid = dict()
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# _tree is indexed by parent_id; at each level a map from name
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# to ie. The None entry is the root.
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self._tree = {None: {}}
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self.root = RootEntry(ROOT_ID)
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self._byid = {self.root.file_id: self.root}
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def __iter__(self):
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return len(self._byid)
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def iter_entries(self, parent_id=None):
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def iter_entries(self, from_dir=None):
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"""Return (path, entry) pairs, in order by name."""
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kids = self._tree[parent_id].items()
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if from_dir == None:
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assert self.root
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from_dir = self.root
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elif isinstance(from_dir, basestring):
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from_dir = self._byid[from_dir]
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kids = from_dir.children.items()
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kids.sort()
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for name, ie in kids:
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yield name, ie
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if ie.kind == 'directory':
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for cn, cie in self.iter_entries(parent_id=ie.file_id):
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yield joinpath([name, cn]), cie
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def directories(self, include_root=True):
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"""Return (path, entry) pairs for all directories.
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"""
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if include_root:
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yield '', None
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for path, entry in self.iter_entries():
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if entry.kind == 'directory':
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yield path, entry
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for cn, cie in self.iter_entries(from_dir=ie.file_id):
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yield os.path.join(name, cn), cie
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def entries(self):
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"""Return list of (path, ie) for all entries except the root.
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This may be faster than iter_entries.
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"""
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accum = []
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def descend(dir_ie, dir_path):
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kids = dir_ie.children.items()
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kids.sort()
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for name, ie in kids:
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child_path = os.path.join(dir_path, name)
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accum.append((child_path, ie))
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if ie.kind == 'directory':
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descend(ie, child_path)
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descend(self.root, '')
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return accum
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def directories(self):
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"""Return (path, entry) pairs for all directories, including the root.
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"""
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accum = []
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def descend(parent_ie, parent_path):
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accum.append((parent_path, parent_ie))
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kids = [(ie.name, ie) for ie in parent_ie.children.itervalues() if ie.kind == 'directory']
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kids.sort()
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for name, child_ie in kids:
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child_path = os.path.join(parent_path, name)
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descend(child_ie, child_path)
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descend(self.root, '')
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return accum
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def children(self, parent_id):
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"""Return entries that are direct children of parent_id."""
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return self._tree[parent_id]
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# TODO: return all paths and entries
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def __contains__(self, file_id):
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"""True if this entry contains a file with given id.
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>>> inv = Inventory()
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>>> inv.add(InventoryEntry('123', 'foo.c'))
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>>> inv.add(InventoryEntry('123', 'foo.c', 'file', ROOT_ID))
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>>> '123' in inv
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True
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>>> '456' in inv
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"""Return the entry for given file_id.
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>>> inv = Inventory()
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>>> inv.add(InventoryEntry('123123', 'hello.c'))
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>>> inv.add(InventoryEntry('123123', 'hello.c', 'file', ROOT_ID))
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>>> inv['123123'].name
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'hello.c'
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"""
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return self._byid[file_id]
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try:
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return self._byid[file_id]
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except KeyError:
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if file_id == None:
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raise BzrError("can't look up file_id None")
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else:
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raise BzrError("file_id {%s} not in inventory" % file_id)
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def get_file_kind(self, file_id):
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return self._byid[file_id].kind
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def get_child(self, parent_id, filename):
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return self[parent_id].children.get(filename)
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def add(self, entry):
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To add a file to a branch ready to be committed, use Branch.add,
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which calls this."""
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if entry.file_id in self:
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bailout("inventory already contains entry with id {%s}" % entry.file_id)
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if entry.parent_id != None:
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if entry.parent_id not in self:
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bailout("parent_id %s of new entry not found in inventory"
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% entry.parent_id)
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if self._tree[entry.parent_id].has_key(entry.name):
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bailout("%s is already versioned"
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% appendpath(self.id2path(entry.parent_id), entry.name))
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if entry.file_id in self._byid:
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raise BzrError("inventory already contains entry with id {%s}" % entry.file_id)
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try:
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parent = self._byid[entry.parent_id]
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except KeyError:
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raise BzrError("parent_id {%s} not in inventory" % entry.parent_id)
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if parent.children.has_key(entry.name):
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raise BzrError("%s is already versioned" %
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appendpath(self.id2path(parent.file_id), entry.name))
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self._byid[entry.file_id] = entry
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self._tree[entry.parent_id][entry.name] = entry
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if entry.kind == 'directory':
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self._tree[entry.file_id] = {}
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parent.children[entry.name] = entry
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def add_path(self, relpath, kind, file_id=None):
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"""Add entry from a path.
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The immediate parent must already be versioned"""
420
from bzrlib.errors import NotVersionedError
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parts = bzrlib.osutils.splitpath(relpath)
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if len(parts) == 0:
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raise BzrError("cannot re-add root of inventory")
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if file_id == None:
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from bzrlib.branch import gen_file_id
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file_id = gen_file_id(relpath)
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parent_path = parts[:-1]
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parent_id = self.path2id(parent_path)
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if parent_id == None:
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raise NotVersionedError(parent_path)
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ie = InventoryEntry(file_id, parts[-1],
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kind=kind, parent_id=parent_id)
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return self.add(ie)
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def __delitem__(self, file_id):
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"""Remove entry by id.
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>>> inv = Inventory()
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>>> inv.add(InventoryEntry('123', 'foo.c'))
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>>> inv.add(InventoryEntry('123', 'foo.c', 'file', ROOT_ID))
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>>> '123' in inv
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True
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>>> del inv['123']
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"""
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ie = self[file_id]
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assert self._tree[ie.parent_id][ie.name] == ie
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assert self[ie.parent_id].children[ie.name] == ie
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# TODO: Test deleting all children; maybe hoist to a separate
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456
# deltree method?
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if ie.kind == 'directory':
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for cie in self._tree[file_id].values():
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for cie in ie.children.values():
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del self[cie.file_id]
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del self._tree[file_id]
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del ie.children
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del self._byid[file_id]
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del self._tree[ie.parent_id][ie.name]
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def id_set(self):
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return Set(self._byid)
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del self[ie.parent_id].children[ie.name]
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def to_element(self):
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"""Convert to XML Element"""
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from bzrlib.xml import Element
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e = Element('inventory')
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e.text = '\n'
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for path, ie in self.iter_entries():
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"""Construct from XML Element
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>>> inv = Inventory()
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>>> inv.add(InventoryEntry('foo.c-123981239', 'foo.c'))
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>>> inv.add(InventoryEntry('foo.c-123981239', 'foo.c', 'file', ROOT_ID))
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>>> elt = inv.to_element()
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>>> inv2 = Inventory.from_element(elt)
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>>> inv2 == inv
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from_element = classmethod(from_element)
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def __cmp__(self, other):
496
def __eq__(self, other):
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"""Compare two sets by comparing their contents.
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498
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>>> i1 = Inventory()
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500
>>> i2 = Inventory()
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501
>>> i1 == i2
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True
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>>> i1.add(InventoryEntry('123', 'foo'))
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>>> i1.add(InventoryEntry('123', 'foo', 'file', ROOT_ID))
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>>> i1 == i2
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False
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>>> i2.add(InventoryEntry('123', 'foo'))
506
>>> i2.add(InventoryEntry('123', 'foo', 'file', ROOT_ID))
432
507
>>> i1 == i2
433
508
True
434
509
"""
435
if self is other:
436
return 0
437
438
510
if not isinstance(other, Inventory):
439
511
return NotImplemented
440
512
441
if self.id_set() ^ other.id_set():
442
return 1
443
444
for file_id in self._byid:
445
c = cmp(self[file_id], other[file_id])
446
if c: return c
447
448
return 0
449
450
451
def id2path(self, file_id):
452
"""Return as a list the path to file_id."""
513
if len(self._byid) != len(other._byid):
514
# shortcut: obviously not the same
515
return False
516
517
return self._byid == other._byid
518
519
520
def __ne__(self, other):
521
return not (self == other)
522
523
524
def __hash__(self):
525
raise ValueError('not hashable')
526
527
528
529
def get_idpath(self, file_id):
530
"""Return a list of file_ids for the path to an entry.
531
532
The list contains one element for each directory followed by
533
the id of the file itself. So the length of the returned list
534
is equal to the depth of the file in the tree, counting the
535
root directory as depth 1.
536
"""
453
537
p = []
454
538
while file_id != None:
455
ie = self[file_id]
456
p = [ie.name] + p
539
try:
540
ie = self._byid[file_id]
541
except KeyError:
542
raise BzrError("file_id {%s} not found in inventory" % file_id)
543
p.insert(0, ie.file_id)
457
544
file_id = ie.parent_id
458
return joinpath(p)
545
return p
546
547
548
def id2path(self, file_id):
549
"""Return as a list the path to file_id."""
550
551
# get all names, skipping root
552
p = [self[fid].name for fid in self.get_idpath(file_id)[1:]]
553
return os.sep.join(p)
459
554
460
555
461
556
467
562
468
563
This returns the entry of the last component in the path,
469
564
which may be either a file or a directory.
565
566
Returns None iff the path is not found.
470
567
"""
471
assert isinstance(name, types.StringTypes)
472
473
parent_id = None
474
for f in splitpath(name):
568
if isinstance(name, types.StringTypes):
569
name = splitpath(name)
570
571
mutter("lookup path %r" % name)
572
573
parent = self.root
574
for f in name:
475
575
try:
476
cie = self._tree[parent_id][f]
576
cie = parent.children[f]
477
577
assert cie.name == f
478
parent_id = cie.file_id
578
assert cie.parent_id == parent.file_id
579
parent = cie
479
580
except KeyError:
480
581
# or raise an error?
481
582
return None
482
583
483
return parent_id
484
485
486
def get_child(self, parent_id, child_name):
487
return self._tree[parent_id].get(child_name)
584
return parent.file_id
488
585
489
586
490
587
def has_filename(self, names):
492
589
493
590
494
591
def has_id(self, file_id):
495
assert isinstance(file_id, str)
496
592
return self._byid.has_key(file_id)
497
593
498
594
499
500
if __name__ == '__main__':
501
import doctest, inventory
502
doctest.testmod(inventory)
595
def rename(self, file_id, new_parent_id, new_name):
596
"""Move a file within the inventory.
597
598
This can change either the name, or the parent, or both.
599
600
This does not move the working file."""
601
if not is_valid_name(new_name):
602
raise BzrError("not an acceptable filename: %r" % new_name)
603
604
new_parent = self._byid[new_parent_id]
605
if new_name in new_parent.children:
606
raise BzrError("%r already exists in %r" % (new_name, self.id2path(new_parent_id)))
607
608
new_parent_idpath = self.get_idpath(new_parent_id)
609
if file_id in new_parent_idpath:
610
raise BzrError("cannot move directory %r into a subdirectory of itself, %r"
611
% (self.id2path(file_id), self.id2path(new_parent_id)))
612
613
file_ie = self._byid[file_id]
614
old_parent = self._byid[file_ie.parent_id]
615
616
# TODO: Don't leave things messed up if this fails
617
618
del old_parent.children[file_ie.name]
619
new_parent.children[new_name] = file_ie
620
621
file_ie.name = new_name
622
file_ie.parent_id = new_parent_id
623
624
625
626
627
_NAME_RE = re.compile(r'^[^/\\]+$')
628
629
def is_valid_name(name):
630
return bool(_NAME_RE.match(name))
Loggerhead is a web-based interface for Breezy
Version: 2.0.1