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Viewing changes to bzrlib/store/text.py

  • Committer: Robert Collins
  • Date: 2005-10-18 05:26:22 UTC
  • mto: This revision was merged to the branch mainline in revision 1463.
  • Revision ID: robertc@robertcollins.net-20051018052622-653d638c9e26fde4
fix broken tests

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bzrlib/store/text.py
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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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"""A store that keeps the full text of every version.
 
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"""
 
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A store that keeps the full text of every version.
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This store keeps uncompressed versions of the full text. It does not
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do any sort of delta compression.
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"""
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import os
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import bzrlib.store
 
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from bzrlib.store import hash_prefix
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from bzrlib.trace import mutter
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from bzrlib.errors import BzrError, NoSuchFile, FileExists
 
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from bzrlib.errors import BzrError
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import gzip
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from cStringIO import StringIO
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    Files are stored uncompressed, with no delta compression.
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    """
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    def _add_compressed(self, fn, f):
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        from cStringIO import StringIO
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        from bzrlib.osutils import pumpfile
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        if isinstance(f, basestring):
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            f = StringIO(f)
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        sio = StringIO()
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        gf = gzip.GzipFile(mode='wb', fileobj=sio)
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        # if pumpfile handles files that don't fit in ram,
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        # so will this function
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        pumpfile(f, gf)
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        gf.close()
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        sio.seek(0)
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        self._try_put(fn, sio)
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    def _add(self, fn, f):
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        if self._compressed:
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            self._add_compressed(fn, f)
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        else:
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            self._try_put(fn, f)
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    def _try_put(self, fn, f):
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        try:
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            self._transport.put(fn, f, mode=self._file_mode)
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        except NoSuchFile:
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            if not self._prefixed:
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                raise
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            try:
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                self._transport.mkdir(os.path.dirname(fn), mode=self._dir_mode)
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            except FileExists:
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                pass
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            self._transport.put(fn, f, mode=self._file_mode)
 
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        self._transport.put(fn, f)
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    def _get(self, fn):
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        if fn.endswith('.gz'):
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            return self._get_compressed(fn)
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        else:
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            return self._transport.get(fn)
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    def _copy_one(self, fileid, suffix, other, pb):
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        # TODO: Once the copy_to interface is improved to allow a source
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        #       and destination targets, then we can always do the copy
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        #       as long as other is a TextStore
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        if not (isinstance(other, TextStore)
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            and other._prefixed == self._prefixed):
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            return super(TextStore, self)._copy_one(fileid, suffix, other, pb)
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        mutter('_copy_one: %r, %r', fileid, suffix)
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        path = other._get_name(fileid, suffix)
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        if path is None:
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            raise KeyError(fileid + '-' + str(suffix))
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        try:
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            result = other._transport.copy_to([path], self._transport,
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                                              mode=self._file_mode)
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        except NoSuchFile:
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            if not self._prefixed:
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                raise
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            try:
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                self._transport.mkdir(self.hash_prefix(fileid)[:-1], mode=self._dir_mode)
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            except FileExists:
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                pass
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            result = other._transport.copy_to([path], self._transport,
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                                              mode=self._file_mode)
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        if result != 1:
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            raise BzrError('Unable to copy file: %r' % (path,))
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    def _get_compressed(self, filename):
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        """Returns a file reading from a particular entry."""
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        f = self._transport.get(filename)
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        # gzip.GzipFile.read() requires a tell() function
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        # but some transports return objects that cannot seek
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        # so buffer them in a StringIO instead
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        if hasattr(f, 'tell'):
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            return gzip.GzipFile(mode='rb', fileobj=f)
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        else:
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            from cStringIO import StringIO
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            sio = StringIO(f.read())
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            return gzip.GzipFile(mode='rb', fileobj=sio)
 
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        return self._transport.get(fn)
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def ScratchTextStore():