зеркало из https://github.com/mozilla/gecko-dev.git
42 строки
1.6 KiB
Python
42 строки
1.6 KiB
Python
# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
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# vim: set filetype=python:
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import absolute_import, print_function
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from jinja2 import Environment, FileSystemLoader, StrictUndefined
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import os
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def main(output_fd, input_filename, *args):
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# FileSystemLoader requires the path to the directory containing templates,
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# not the file name of the template itself. We hang onto the leaf name
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# which will shortly be passed to Environment.get_template.
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(path, leaf) = os.path.split(input_filename)
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# Jinja's default value for undefined is too permissive and would allow
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# omissions to slip into the generated output. We set undefined to
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# StrictUndefined to force Jinja to raise an exception any time a required
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# value is missing.
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env = Environment(
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loader=FileSystemLoader(path, encoding="utf-8"),
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autoescape=True,
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undefined=StrictUndefined,
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)
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tpl = env.get_template(leaf)
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context = dict()
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# args should all be key=value pairs that will be added to the context.
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# Note that all values are *strings*, so the Jinja template may need to
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# convert them to other types during processing.
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# (As in Python, the empty string is falsy, so simple boolean checks are possible)
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for arg in args:
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(k, v) = arg.split("=", 1)
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context[k] = v
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# Now run the template and send its output directly to output_fd
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tpl.stream(context).dump(output_fd, encoding="utf-8")
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