48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
# Copyright 2014-2015 Canonical Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Templating using the python3-jinja2 package.
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"""
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from charmhelpers.fetch import apt_install, apt_update
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try:
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import jinja2
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except ImportError:
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apt_update(fatal=True)
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apt_install(["python3-jinja2"], fatal=True)
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import jinja2
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DEFAULT_TEMPLATES_DIR = 'templates'
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def render(template_name, context, template_dir=DEFAULT_TEMPLATES_DIR,
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jinja_env_args=None):
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"""
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Render jinja2 template with provided context.
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:param template_name: name of the jinja template file
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:param context: template context
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:param template_dir: directory in which the template file is located
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:param jinja_env_args: additional arguments passed to the
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jinja2.Environment. Expected dict with format
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{'arg_name': 'arg_value'}
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:return: Rendered template as a string
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"""
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env_kwargs = jinja_env_args or {}
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templates = jinja2.Environment(
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loader=jinja2.FileSystemLoader(template_dir), **env_kwargs)
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template = templates.get_template(template_name)
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return template.render(context)
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