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#!/usr/bin/env python3
#
# Copyright (C) 2021-present MongoDB, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the Server Side Public License, version 1,
# as published by MongoDB, Inc.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Server Side Public License for more details.
#
# You should have received a copy of the Server Side Public License
# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
# all of the code used other than as permitted herein. If you modify file(s)
# with this exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version. If you delete this
# exception statement from all source files in the program, then also delete
# it in the license file.
"""Feed command line arguments to a Cheetah template to generate a source file."""
import argparse
import sys
from Cheetah.Template import Template
def main():
"""Generate a source file by passing command line arguments to a Cheetah template.
The Cheetah template will be expanded with an `$args` in its namespace, containing
the trailing command line arguments of this program.
"""
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('-o', nargs='?', type=argparse.FileType('w'), default=sys.stdout,
help='output file (default sys.stdout)')
parser.add_argument('template_file', help='Cheetah template file')
parser.add_argument('template_arg', nargs='*', default=[], help='Cheetah template args')
opts = parser.parse_args()
opts.o.write(str(Template(file=opts.template_file, namespaces=[{'args': opts.template_arg}])))
if __name__ == '__main__':
main()
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