#!/usr/bin/python3

#

# This script turns localedata/SUPPORTED (whose path is passed as the

# first argument) into a normalized list of LANGUAGE "_" REGION pairs.

# (If there is no REGION defined, only LANGUAGE is used.)  The list

# is written to standard output, with one element per line.

import sys

supported, = sys.argv[1:]

# Pairs seen so far.  Used to suppress duplicates.

seen = set()

with open(supported) as inp:

    for line in inp:

        if line.startswith("#") or line == "SUPPORTED-LOCALES=\\\n":

            # Comment or prefix.

            continue

        if not line.endswith(" \\\n"):

            raise IOError("line without continuation: " + repr(line))

        try:

            slash = line.index("/")

        except ValueError:

            raise IOError("line without slash: " + repr(line))

        spec = line[:slash]

        for separator in ".@":

            try:

                # Strip charset, variant specifiers.

                spec = spec[:spec.index(separator)]

            except ValueError:

                pass

        seen.add(spec)

# The C locale does not correspond to a language.

seen.remove("C")

# The glibc source file is not sorted.

for spec in sorted(seen):

    print(spec)

print() # The Lua generator produces a trailing newline.