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Viewing changes to bzrlib/export/dir_exporter.py

  • Committer: Andrew Bennetts
  • Date: 2010-04-13 04:33:55 UTC
  • mfrom: (5147 +trunk)
  • mto: This revision was merged to the branch mainline in revision 5149.
  • Revision ID: andrew.bennetts@canonical.com-20100413043355-lg3id0uwtju0k3zs
Merge lp:bzr.

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bzrlib/export/dir_exporter.py
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# Copyright (C) 2005 Canonical Ltd
 
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# Copyright (C) 2005, 2006, 2008, 2009, 2010 Canonical Ltd
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#
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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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#
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# You should have received a copy of the GNU General Public License
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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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"""Export a Tree to a non-versioned directory.
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"""
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""Export a bzrlib.tree.Tree to a new or empty directory."""
 
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import errno
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import os
 
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import time
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from bzrlib import errors, osutils
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from bzrlib.export import _export_iter_entries
 
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from bzrlib.filters import (
 
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    ContentFilterContext,
 
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    filtered_output_bytes,
 
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    )
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from bzrlib.trace import mutter
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def dir_exporter(tree, dest, root, subdir):
 
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def dir_exporter(tree, dest, root, subdir, filtered=False,
 
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                 per_file_timestamps=False):
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    """Export this tree to a new directory.
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    `dest` should not exist, and will be created holding the
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    contents of this tree.
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    TODO: To handle subdirectories we need to create the
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           directories first.
 
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    `dest` should either not exist or should be empty. If it does not exist it
 
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    will be created holding the contents of this tree.
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    :note: If the export fails, the destination directory will be
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           left in a half-assed state.
 
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           left in an incompletely exported state: export is not transactional.
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    """
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    mutter('export version %r', tree)
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    os.mkdir(dest)
 
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    try:
 
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        os.mkdir(dest)
 
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    except OSError, e:
 
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        if e.errno == errno.EEXIST:
 
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            # check if directory empty
 
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            if os.listdir(dest) != []:
 
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                raise errors.BzrError("Can't export tree to non-empty directory.")
 
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        else:
 
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            raise
 
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    # Iterate everything, building up the files we will want to export, and
 
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    # creating the directories and symlinks that we need.
 
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    # This tracks (file_id, (destination_path, executable))
 
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    # This matches the api that tree.iter_files_bytes() wants
 
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    # Note in the case of revision trees, this does trigger a double inventory
 
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    # lookup, hopefully it isn't too expensive.
 
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    to_fetch = []
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    for dp, ie in _export_iter_entries(tree, subdir):
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        fullpath = osutils.pathjoin(dest, dp)
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        if ie.kind == "file":
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            fileobj = tree.get_file(ie.file_id)
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            osutils.pumpfile(fileobj, file(fullpath, 'wb'))
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            if tree.is_executable(ie.file_id):
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                os.chmod(fullpath, 0755)
 
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            to_fetch.append((ie.file_id, (dp, tree.is_executable(ie.file_id))))
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        elif ie.kind == "directory":
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            os.mkdir(fullpath)
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        elif ie.kind == "symlink":
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            try:
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                os.symlink(ie.symlink_target, fullpath)
 
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                symlink_target = tree.get_symlink_target(ie.file_id)
 
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                os.symlink(symlink_target, fullpath)
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            except OSError,e:
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                raise errors.BzrError(
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                    "Failed to create symlink %r -> %r, error: %s"
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                    % (fullpath, self.symlink_target, e))
 
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                    % (fullpath, symlink_target, e))
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        else:
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            raise errors.BzrError("don't know how to export {%s} of kind %r" %
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               (ie.file_id, ie.kind))
 
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    # The data returned here can be in any order, but we've already created all
 
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    # the directories
 
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    flags = os.O_CREAT | os.O_TRUNC | os.O_WRONLY | getattr(os, 'O_BINARY', 0)
 
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    now = time.time()
 
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    for (relpath, executable), chunks in tree.iter_files_bytes(to_fetch):
 
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        if filtered:
 
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            filters = tree._content_filter_stack(relpath)
 
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            context = ContentFilterContext(relpath, tree, ie)
 
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            chunks = filtered_output_bytes(chunks, filters, context)
 
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        fullpath = osutils.pathjoin(dest, relpath)
 
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        # We set the mode and let the umask sort out the file info
 
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        mode = 0666
 
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        if executable:
 
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            mode = 0777
 
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        out = os.fdopen(os.open(fullpath, flags, mode), 'wb')
 
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        try:
 
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            out.writelines(chunks)
 
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        finally:
 
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            out.close()
 
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        if per_file_timestamps:
 
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            mtime = tree.get_file_mtime(tree.path2id(relpath), relpath)
 
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        else:
 
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            mtime = now
 
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        os.utime(fullpath, (mtime, mtime))