~bzr-pqm/bzr/bzr.dev

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# Copyright (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


import os
    
import bzrlib.tree
from errors import BzrCheckError
from trace import mutter
import statcache

class WorkingTree(bzrlib.tree.Tree):
    """Working copy tree.

    The inventory is held in the `Branch` working-inventory, and the
    files are in a directory on disk.

    It is possible for a `WorkingTree` to have a filename which is
    not listed in the Inventory and vice versa.
    """
    _statcache = None
    
    def __init__(self, basedir, inv):
        self._inventory = inv
        self.basedir = basedir
        self.path2id = inv.path2id
        self._update_statcache()

    def __iter__(self):
        """Iterate through file_ids for this tree.

        file_ids are in a WorkingTree if they are in the working inventory
        and the working file exists.
        """
        inv = self._inventory
        for file_id in self._inventory:
            # TODO: This is slightly redundant; we should be able to just
            # check the statcache but it only includes regular files.
            # only include files which still exist on disk
            ie = inv[file_id]
            if ie.kind == 'file':
                if ((file_id in self._statcache)
                    or (os.path.exists(self.abspath(inv.id2path(file_id))))):
                    yield file_id



    def __repr__(self):
        return "<%s of %s>" % (self.__class__.__name__,
                               self.basedir)

    def abspath(self, filename):
        return os.path.join(self.basedir, filename)

    def has_filename(self, filename):
        return os.path.exists(self.abspath(filename))

    def get_file(self, file_id):
        return self.get_file_byname(self.id2path(file_id))

    def get_file_byname(self, filename):
        return file(self.abspath(filename), 'rb')

    def _get_store_filename(self, file_id):
        ## XXX: badly named; this isn't in the store at all
        return self.abspath(self.id2path(file_id))

                
    def has_id(self, file_id):
        # files that have been deleted are excluded
        if not self.inventory.has_id(file_id):
            return False
        if file_id in self._statcache:
            return True
        return os.path.exists(self.abspath(self.id2path(file_id)))


    __contains__ = has_id
    

    def _update_statcache(self):
        import statcache
        if not self._statcache:
            self._statcache = statcache.update_cache(self.basedir, self.inventory)

    def get_file_size(self, file_id):
        import os, stat
        return os.stat(self._get_store_filename(file_id))[stat.ST_SIZE]


    def get_file_sha1(self, file_id):
        return self._statcache[file_id][statcache.SC_SHA1]


    def file_class(self, filename):
        if self.path2id(filename):
            return 'V'
        elif self.is_ignored(filename):
            return 'I'
        else:
            return '?'


    def list_files(self):
        """Recursively list all files as (path, class, kind, id).

        Lists, but does not descend into unversioned directories.

        This does not include files that have been deleted in this
        tree.

        Skips the control directory.
        """
        from osutils import appendpath, file_kind
        import os

        inv = self.inventory

        def descend(from_dir_relpath, from_dir_id, dp):
            ls = os.listdir(dp)
            ls.sort()
            for f in ls:
                ## TODO: If we find a subdirectory with its own .bzr
                ## directory, then that is a separate tree and we
                ## should exclude it.
                if bzrlib.BZRDIR == f:
                    continue

                # path within tree
                fp = appendpath(from_dir_relpath, f)

                # absolute path
                fap = appendpath(dp, f)
                
                f_ie = inv.get_child(from_dir_id, f)
                if f_ie:
                    c = 'V'
                elif self.is_ignored(fp):
                    c = 'I'
                else:
                    c = '?'

                fk = file_kind(fap)

                if f_ie:
                    if f_ie.kind != fk:
                        raise BzrCheckError("file %r entered as kind %r id %r, "
                                            "now of kind %r"
                                            % (fap, f_ie.kind, f_ie.file_id, fk))

                yield fp, c, fk, (f_ie and f_ie.file_id)

                if fk != 'directory':
                    continue

                if c != 'V':
                    # don't descend unversioned directories
                    continue
                
                for ff in descend(fp, f_ie.file_id, fap):
                    yield ff

        for f in descend('', inv.root.file_id, self.basedir):
            yield f
            


    def unknowns(self):
        for subp in self.extras():
            if not self.is_ignored(subp):
                yield subp


    def extras(self):
        """Yield all unknown files in this WorkingTree.

        If there are any unknown directories then only the directory is
        returned, not all its children.  But if there are unknown files
        under a versioned subdirectory, they are returned.

        Currently returned depth-first, sorted by name within directories.
        """
        ## TODO: Work from given directory downwards
        from osutils import isdir, appendpath
        
        for path, dir_entry in self.inventory.directories():
            mutter("search for unknowns in %r" % path)
            dirabs = self.abspath(path)
            if not isdir(dirabs):
                # e.g. directory deleted
                continue

            fl = []
            for subf in os.listdir(dirabs):
                if (subf != '.bzr'
                    and (subf not in dir_entry.children)):
                    fl.append(subf)
            
            fl.sort()
            for subf in fl:
                subp = appendpath(path, subf)
                yield subp


    def ignored_files(self):
        """Yield list of PATH, IGNORE_PATTERN"""
        for subp in self.extras():
            pat = self.is_ignored(subp)
            if pat != None:
                yield subp, pat


    def get_ignore_list(self):
        """Return list of ignore patterns.

        Cached in the Tree object after the first call.
        """
        if hasattr(self, '_ignorelist'):
            return self._ignorelist

        l = bzrlib.DEFAULT_IGNORE[:]
        if self.has_filename(bzrlib.IGNORE_FILENAME):
            f = self.get_file_byname(bzrlib.IGNORE_FILENAME)
            l.extend([line.rstrip("\n\r") for line in f.readlines()])
        self._ignorelist = l
        return l


    def is_ignored(self, filename):
        r"""Check whether the filename matches an ignore pattern.

        Patterns containing '/' or '\' need to match the whole path;
        others match against only the last component.

        If the file is ignored, returns the pattern which caused it to
        be ignored, otherwise None.  So this can simply be used as a
        boolean if desired."""

        # TODO: Use '**' to match directories, and other extended
        # globbing stuff from cvs/rsync.

        # XXX: fnmatch is actually not quite what we want: it's only
        # approximately the same as real Unix fnmatch, and doesn't
        # treat dotfiles correctly and allows * to match /.
        # Eventually it should be replaced with something more
        # accurate.
        
        import fnmatch
        from osutils import splitpath
        
        for pat in self.get_ignore_list():
            if '/' in pat or '\\' in pat:
                
                # as a special case, you can put ./ at the start of a
                # pattern; this is good to match in the top-level
                # only;
                
                if (pat[:2] == './') or (pat[:2] == '.\\'):
                    newpat = pat[2:]
                else:
                    newpat = pat
                if fnmatch.fnmatchcase(filename, newpat):
                    return pat
            else:
                if fnmatch.fnmatchcase(splitpath(filename)[-1], pat):
                    return pat
        else:
            return None