| 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 |
|
|
|
|
| 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 ``ftp.iana.org/tz``. |
| |
| """ |
| tmpdir = tempfile.mkdtemp() |
| zonedir = os.path.join(tmpdir, "zoneinfo") |
| moduledir = os.path.dirname(__file__) |
| try: |
| with TarFile.open(filename) as tf: |
| for name in zonegroups: |
| tf.extract(name, tmpdir) |
| filepaths = [os.path.join(tmpdir, n) for n in zonegroups] |
|
|
| _run_zic(zonedir, filepaths) |
|
|
| |
| 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 TarFile.open(target, "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?") |
|
|
