"""distutils.archive_util Utility functions for creating archive files (tarballs, zip files,that sort of thing).""" # This module should be kept compatible with Python 2.1. __revision__ = "$Id: archive_util.py 37828 2004-11-10 22:23:15Z loewis $" import osfrom distutils.errors import DistutilsExecErrorfrom distutils.spawn import spawnfrom distutils.dir_util import mkpathfrom distutils import log def make_tarball (base_name, base_dir, compress="gzip",                  verbose=0, dry_run=0):    """Create a (possibly compressed) tar file from all the files under    'base_dir'.  'compress' must be "gzip" (the default), "compress",    "bzip2", or None.  Both "tar" and the compression utility named by    'compress' must be on the default program search path, so this is    probably Unix-specific.  The output tar file will be named 'base_dir' +    ".tar", possibly plus the appropriate compression extension (".gz",    ".bz2" or ".Z").  Return the output filename.    """    # XXX GNU tar 1.13 has a nifty option to add a prefix directory.    # It's pretty new, though, so we certainly can't require it --    # but it would be nice to take advantage of it to skip the    # "create a tree of hardlinks" step!  (Would also be nice to    # detect GNU tar to use its 'z' option and save a step.)     compress_ext = { 'gzip': ".gz",                     'bzip2': '.bz2',                     'compress': ".Z" }     # flags for compression program, each element of list will be an argument    compress_flags = {'gzip': ["-f9"],                      'compress': ["-f"],                      'bzip2': ['-f9']}     if compress is not None and compress not in compress_ext.keys():        raise ValueError, \              "bad value for 'compress': must be None, 'gzip', or 'compress'"     archive_name = base_name + ".tar"    mkpath(os.path.dirname(archive_name), dry_run=dry_run)    cmd = ["tar", "-cf", archive_name, base_dir]    spawn(cmd, dry_run=dry_run)     if compress:        spawn([compress] + compress_flags[compress] + [archive_name],              dry_run=dry_run)        return archive_name + compress_ext[compress]    else:        return archive_name # make_tarball ()  def make_zipfile (base_name, base_dir, verbose=0, dry_run=0):    """Create a zip file from all the files under 'base_dir'.  The output    zip file will be named 'base_dir' + ".zip".  Uses either the "zipfile"    Python module (if available) or the InfoZIP "zip" utility (if installed    and found on the default search path).  If neither tool is available,    raises DistutilsExecError.  Returns the name of the output zip file.    """    try:        import zipfile    except ImportError:        zipfile = None     zip_filename = base_name + ".zip"    mkpath(os.path.dirname(zip_filename), dry_run=dry_run)     # If zipfile module is not available, try spawning an external    # 'zip' command.    if zipfile is None:        if verbose:            zipoptions = "-r"        else:            zipoptions = "-rq"         try:            spawn(["zip", zipoptions, zip_filename, base_dir],                  dry_run=dry_run)        except DistutilsExecError:            # XXX really should distinguish between "couldn't find            # external 'zip' command" and "zip failed".            raise DistutilsExecError, \                  ("unable to create zip file '%s': "                   "could neither import the 'zipfile' module nor "                   "find a standalone zip utility") % zip_filename     else:        log.info("creating '%s' and adding '%s' to it",                 zip_filename, base_dir)         def visit (z, dirname, names):            for name in names:                path = os.path.normpath(os.path.join(dirname, name))                if os.path.isfile(path):                    z.write(path, path)                    log.info("adding '%s'" % path)         if not dry_run:            z = zipfile.ZipFile(zip_filename, "w",                                compression=zipfile.ZIP_DEFLATED)             os.path.walk(base_dir, visit, z)            z.close()     return zip_filename # make_zipfile ()  ARCHIVE_FORMATS = {    'gztar': (make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),    'bztar': (make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),    'ztar':  (make_tarball, [('compress', 'compress')], "compressed tar file"),    'tar':   (make_tarball, [('compress', None)], "uncompressed tar file"),    'zip':   (make_zipfile, [],"ZIP file")    } def check_archive_formats (formats):    for format in formats:        if not ARCHIVE_FORMATS.has_key(format):            return format    else:        return None def make_archive (base_name, format,                  root_dir=None, base_dir=None,                  verbose=0, dry_run=0):    """Create an archive file (eg. zip or tar).  'base_name' is the name    of the file to create, minus any format-specific extension; 'format'    is the archive format: one of "zip", "tar", "ztar", or "gztar".    'root_dir' is a directory that will be the root directory of the    archive; ie. we typically chdir into 'root_dir' before creating the    archive.  'base_dir' is the directory where we start archiving from;    ie. 'base_dir' will be the common prefix of all files and    directories in the archive.  'root_dir' and 'base_dir' both default    to the current directory.  Returns the name of the archive file.    """    save_cwd = os.getcwd()    if root_dir is not None:        log.debug("changing into '%s'", root_dir)        base_name = os.path.abspath(base_name)        if not dry_run:            os.chdir(root_dir)     if base_dir is None:        base_dir = os.curdir     kwargs = { 'dry_run': dry_run }     try:        format_info = ARCHIVE_FORMATS[format]    except KeyError:        raise ValueError, "unknown archive format '%s'" % format     func = format_info[0]    for (arg,val) in format_info[1]:        kwargs[arg] = val    filename = apply(func, (base_name, base_dir), kwargs)     if root_dir is not None:        log.debug("changing back to '%s'", save_cwd)        os.chdir(save_cwd)     return filename # make_archive ()