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