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Diffstat (limited to 'lib/python2.7/distutils/archive_util.py')
| -rw-r--r-- | lib/python2.7/distutils/archive_util.py | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/lib/python2.7/distutils/archive_util.py b/lib/python2.7/distutils/archive_util.py new file mode 100644 index 0000000..834b722 --- /dev/null +++ b/lib/python2.7/distutils/archive_util.py @@ -0,0 +1,243 @@ +"""distutils.archive_util + +Utility functions for creating archive files (tarballs, zip files, +that sort of thing).""" + +__revision__ = "$Id$" + +import os +from warnings import warn +import sys + +from distutils.errors import DistutilsExecError +from distutils.spawn import spawn +from distutils.dir_util import mkpath +from distutils import log + +try: + from pwd import getpwnam +except ImportError: + getpwnam = None + +try: + from grp import getgrnam +except ImportError: + getgrnam = None + +def _get_gid(name): + """Returns a gid, given a group name.""" + if getgrnam is None or name is None: + return None + try: + result = getgrnam(name) + except KeyError: + result = None + if result is not None: + return result[2] + return None + +def _get_uid(name): + """Returns an uid, given a user name.""" + if getpwnam is None or name is None: + return None + try: + result = getpwnam(name) + except KeyError: + result = None + if result is not None: + return result[2] + return None + +def make_tarball(base_name, base_dir, compress="gzip", verbose=0, dry_run=0, + owner=None, group=None): + """Create a (possibly compressed) tar file from all the files under + 'base_dir'. + + 'compress' must be "gzip" (the default), "compress", "bzip2", or None. + (compress will be deprecated in Python 3.2) + + 'owner' and 'group' can be used to define an owner and a group for the + archive that is being built. If not provided, the current owner and group + will be used. + + The output tar file will be named 'base_dir' + ".tar", possibly plus + the appropriate compression extension (".gz", ".bz2" or ".Z"). + + Returns the output filename. + """ + tar_compression = {'gzip': 'gz', 'bzip2': 'bz2', None: '', 'compress': ''} + compress_ext = {'gzip': '.gz', 'bzip2': '.bz2', 'compress': '.Z'} + + # flags for compression program, each element of list will be an argument + if compress is not None and compress not in compress_ext.keys(): + raise ValueError, \ + ("bad value for 'compress': must be None, 'gzip', 'bzip2' " + "or 'compress'") + + archive_name = base_name + '.tar' + if compress != 'compress': + archive_name += compress_ext.get(compress, '') + + mkpath(os.path.dirname(archive_name), dry_run=dry_run) + + # creating the tarball + import tarfile # late import so Python build itself doesn't break + + log.info('Creating tar archive') + + uid = _get_uid(owner) + gid = _get_gid(group) + + def _set_uid_gid(tarinfo): + if gid is not None: + tarinfo.gid = gid + tarinfo.gname = group + if uid is not None: + tarinfo.uid = uid + tarinfo.uname = owner + return tarinfo + + if not dry_run: + tar = tarfile.open(archive_name, 'w|%s' % tar_compression[compress]) + try: + tar.add(base_dir, filter=_set_uid_gid) + finally: + tar.close() + + # compression using `compress` + if compress == 'compress': + warn("'compress' will be deprecated.", PendingDeprecationWarning) + # the option varies depending on the platform + compressed_name = archive_name + compress_ext[compress] + if sys.platform == 'win32': + cmd = [compress, archive_name, compressed_name] + else: + cmd = [compress, '-f', archive_name] + spawn(cmd, dry_run=dry_run) + return compressed_name + + return archive_name + +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_name' + ".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) + + if not dry_run: + zip = zipfile.ZipFile(zip_filename, "w", + compression=zipfile.ZIP_DEFLATED) + + for dirpath, dirnames, filenames in os.walk(base_dir): + for name in filenames: + path = os.path.normpath(os.path.join(dirpath, name)) + if os.path.isfile(path): + zip.write(path, path) + log.info("adding '%s'" % path) + zip.close() + + return zip_filename + +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): + """Returns the first format from the 'format' list that is unknown. + + If all formats are known, returns None + """ + for format in formats: + if format not in ARCHIVE_FORMATS: + return format + return None + +def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0, + dry_run=0, owner=None, group=None): + """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. + + 'owner' and 'group' are used when creating a tar archive. By default, + uses the current owner and group. + """ + 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 + + if format != 'zip': + kwargs['owner'] = owner + kwargs['group'] = group + + try: + filename = func(base_name, base_dir, **kwargs) + finally: + if root_dir is not None: + log.debug("changing back to '%s'", save_cwd) + os.chdir(save_cwd) + + return filename |