Source code for dateutil.zoneinfo.rebuild

import logging
import os
import tempfile
import shutil
import json
from subprocess import check_call, check_output
from tarfile import TarFile

from dateutil.zoneinfo import METADATA_FN, ZONEFILENAME

[docs] def rebuild(filename, tag=None, format="gz", zonegroups=[], metadata=None): """Rebuild the internal timezone info in dateutil/zoneinfo/zoneinfo*tar* filename is the timezone tarball from ````. """ tmpdir = tempfile.mkdtemp() zonedir = os.path.join(tmpdir, "zoneinfo") moduledir = os.path.dirname(__file__) try: with as tf: for name in zonegroups: tf.extract(name, tmpdir) filepaths = [os.path.join(tmpdir, n) for n in zonegroups] _run_zic(zonedir, filepaths) # write metadata file with open(os.path.join(zonedir, METADATA_FN), 'w') as f: json.dump(metadata, f, indent=4, sort_keys=True) target = os.path.join(moduledir, ZONEFILENAME) with, "w:%s" % format) as tf: for entry in os.listdir(zonedir): entrypath = os.path.join(zonedir, entry) tf.add(entrypath, entry) finally: shutil.rmtree(tmpdir)
def _run_zic(zonedir, filepaths): """Calls the ``zic`` compiler in a compatible way to get a "fat" binary. Recent versions of ``zic`` default to ``-b slim``, while older versions don't even have the ``-b`` option (but default to "fat" binaries). The current version of dateutil does not support Version 2+ TZif files, which causes problems when used in conjunction with "slim" binaries, so this function is used to ensure that we always get a "fat" binary. """ try: help_text = check_output(["zic", "--help"]) except OSError as e: _print_on_nosuchfile(e) raise if b"-b " in help_text: bloat_args = ["-b", "fat"] else: bloat_args = [] check_call(["zic"] + bloat_args + ["-d", zonedir] + filepaths) def _print_on_nosuchfile(e): """Print helpful troubleshooting message e is an exception raised by subprocess.check_call() """ if e.errno == 2: logging.error( "Could not find zic. Perhaps you need to install " "libc-bin or some other package that provides it, " "or it's not in your PATH?")