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#!/usr/bin/python3
# Author: Benjamin Drung <bdrung@ubuntu.com>
"""Generate tzdata debconf templates file."""
import argparse
import logging
import os
import pathlib
import sys
import natsort
LOG_FORMAT = "%(name)s %(levelname)s: %(message)s"
__script_name__ = os.path.basename(sys.argv[0]) if __name__ == "__main__" else __name__
TEMPLATES_AREAS = [
"Africa",
"America",
"Antarctica",
"Arctic",
"Asia",
"Atlantic",
"Australia",
"Europe",
"Indian",
"Pacific",
"Etc",
]
# List of backward compatability symlinks that should not be selectable
EXCLUDE_SYMLINKS = {
"Africa/Asmera",
"America/Argentina/ComodRivadavia",
"America/Buenos_Aires",
"America/Catamarca",
"America/Cordoba",
"America/Fort_Wayne",
"America/Godthab",
"America/Indianapolis",
"America/Jujuy",
"America/Knox_IN",
"America/Louisville",
"America/Mendoza",
"America/Rosario",
"Antarctica/South_Pole",
"Asia/Ashkhabad",
"Asia/Calcutta",
"Asia/Chungking",
"Asia/Dacca",
"Asia/Katmandu",
"Asia/Macao",
"Asia/Rangoon",
"Asia/Saigon",
"Asia/Thimbu",
"Asia/Ujung_Pandang",
"Asia/Ulan_Bator",
"Atlantic/Faeroe",
"Australia/ACT",
"Australia/LHI",
"Australia/NSW",
"Australia/North",
"Australia/Queensland",
"Australia/South",
"Australia/Tasmania",
"Australia/Victoria",
"Australia/West",
"Europe/Kiev",
"Europe/Uzhgorod",
"Europe/Zaporozhye",
"Pacific/Enderbury",
"Pacific/Ponape",
"Pacific/Truk",
"US/Alaska",
"US/Aleutian",
"US/Arizona",
"US/Central",
"US/East-Indiana",
"US/Eastern",
"US/Hawaii",
"US/Indiana-Starke",
"US/Michigan",
"US/Mountain",
"US/Pacific",
"US/Samoa",
}
# List of symlinks that should be selectable
INCLUDE_SYMLINKS = {
"Africa/Timbuktu",
"America/Atka",
"America/Coral_Harbour",
"America/Ensenada",
"America/Kralendijk",
"America/Lower_Princes",
"America/Marigot",
"America/Montreal",
"America/Nipigon",
"America/Pangnirtung",
"America/Porto_Acre",
"America/Rainy_River",
"America/Santa_Isabel",
"America/Shiprock",
"America/St_Barthelemy",
"America/Thunder_Bay",
"America/Virgin",
"America/Yellowknife",
"Arctic/Longyearbyen",
"Asia/Chongqing",
"Asia/Harbin",
"Asia/Istanbul",
"Asia/Kashgar",
"Asia/Tel_Aviv",
"Atlantic/Jan_Mayen",
"Australia/Canberra",
"Australia/Currie",
"Australia/Yancowinna",
"Europe/Belfast",
"Europe/Bratislava",
"Europe/Busingen",
"Europe/Mariehamn",
"Europe/Nicosia",
"Europe/Podgorica",
"Europe/San_Marino",
"Europe/Tiraspol",
"Europe/Vatican",
"Pacific/Johnston",
"Pacific/Samoa",
"Pacific/Yap",
"Etc/GMT+0",
"Etc/GMT-0",
"Etc/GMT0",
"Etc/Greenwich",
"Etc/UCT",
"Etc/Universal",
"Etc/Zulu",
}
def get_timezones(base_dir: pathlib.Path, subdir: pathlib.Path) -> list[str]:
"""Return list of timezone files relative to the base_dir."""
timezones = []
for path in natsort.natsorted(subdir.iterdir(), key=str):
if path.is_dir():
timezones += get_timezones(base_dir, path)
continue
timezone = str(path.relative_to(base_dir))
if path.is_symlink():
if timezone in EXCLUDE_SYMLINKS:
continue
if timezone not in INCLUDE_SYMLINKS:
logger = logging.getLogger(__script_name__)
logger.error(
"Timezone '%s' is a symlink, but neither in EXCLUDE_SYMLINKS"
" nor INCLUDE_SYMLINKS. Please add it explicitly.",
timezone,
)
sys.exit(1)
timezones.append(timezone)
return timezones
def generate_debconf_templates_area(zoneinfo_dir: pathlib.Path, area: str) -> str:
"""Generate tzdata debconf templates paragraph for given area."""
timezones = get_timezones(zoneinfo_dir, zoneinfo_dir / area)
choices = [timezone.split("/", maxsplit=1)[1] for timezone in timezones]
if area == "Etc":
choices_key = "Choices"
description = (
"Please select your time zone. Contrary to modern conventions, these"
" POSIX-compatible zones use positive values to refer to zones west of"
" Greenwich and negative values for those east of Greenwich"
" (e.g., 'Etc/GMT+6' refers to 6 hours west of Greenwich,"
" commonly called 'UTC-6')."
)
else:
choices_key = "__Choices"
description = (
"Please select the city or region corresponding to your time zone."
)
return f"""\
Template: tzdata/Zones/{area}
Type: select
# Translators: This is a city name.
# Do not translate underscores. You can use spaces instead.
#flag:partial
{choices_key}: {", ".join(choices)}
_Description: Time zone:
{description}
"""
def generate_debconf_templates(zoneinfo_dir: pathlib.Path) -> str:
"""Generate tzdata debconf templates file content."""
debconf_templates = f"""\
# This file was generated by {pathlib.Path(__file__).relative_to(os.getcwd())}
#
Template: tzdata/Areas
Type: select
# Note to translators:
# - This is a continent or ocean (except for "Etc")
# - "Etc" will present users with a list of "GMT+xx" or "GMT-xx" timezones
__Choices: {", ".join(TEMPLATES_AREAS)}
_Description: Geographic area:
Please select the geographic area in which you live. Subsequent
configuration questions will narrow this down by presenting a list of
cities, representing the time zones in which they are located.
"""
for area in TEMPLATES_AREAS:
debconf_templates += "\n" + generate_debconf_templates_area(zoneinfo_dir, area)
return debconf_templates
def existing_dir_path(string: str) -> pathlib.Path:
"""Convert string to existing dir path or raise ArgumentTypeError."""
path = pathlib.Path(string)
if not path.is_dir():
raise argparse.ArgumentTypeError(f"Directory {string} does not exist")
return path
def main() -> None:
"""Generate tzdata debconf templates file."""
parser = argparse.ArgumentParser()
parser.add_argument(
"-d",
"--directory",
default=".",
type=existing_dir_path,
help="Directory containing the generated zoneinfo files",
)
args = parser.parse_args()
logging.basicConfig(format=LOG_FORMAT)
print(generate_debconf_templates(args.directory), end="")
if __name__ == "__main__":
main()
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