core/scripts/template_expander.py

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import os
import sys

_current_dir = os.path.dirname(os.path.realpath(__file__))
# jinja2 is in chromium's third_party directory
sys.path.append(os.path.join(_current_dir, *([os.pardir] * 4)))
import jinja2


def apply_template(path_to_template, params):
    dirname, basename = os.path.split(path_to_template)
    path_to_templates = os.path.join(_current_dir, "templates")
    jinja_env = jinja2.Environment(loader=jinja2.FileSystemLoader([dirname, path_to_templates]))
    template = jinja_env.get_template(basename)
    return template.render(params)