Skip to content

Instantly share code, notes, and snippets.

@GiovanH

GiovanH/j2 Secret

Created November 29, 2022 06:07
  • Star 2 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save GiovanH/15e5ee2ebe8f4db5f19ebc585e488701 to your computer and use it in GitHub Desktop.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import json
import os
import jinja2
EXTENSIONS = ["jinja2.ext.loopcontrols", "jinja2.ext.debug"]
NO_CLOBBER = False
PICO8_MODE = False
def render_template(template_path, input_data, out_path):
exopts = {}
if PICO8_MODE:
exopts = {
"variable_start_string": '"{{',
"variable_end_string": '}}"',
"line_statement_prefix": "--%"
}
print("Rendering template '{}' to '{}'".format(template_path, out_path))
env = jinja2.Environment(
loader=jinja2.FileSystemLoader(os.path.dirname(template_path)),
extensions=EXTENSIONS,
keep_trailing_newline=True,
**exopts
)
# Add environ global
os.environ["UID"] = str(os.getuid())
env.globals["environ"] = lambda key: str(os.environ.get(key))
env.globals["get_context"] = lambda: input_data
return env.get_template(os.path.basename(template_path)).render(input_data)
def auto_render_template(file_path, input_data):
out_path, dotj2 = os.path.splitext(file_path)
if dotj2 != ".j2":
raise ValueError("File '{}' is not a jinja2 template ending with .j2".format(file_path))
if os.path.isfile(out_path) and NO_CLOBBER:
raise IOError("File exists: '{}' and no-clobber is {}.".format(out_path, NO_CLOBBER))
with open(out_path, 'wb') as fp:
fp.write(render_template(file_path, input_data, out_path).encode('utf-8'))
def parse_args():
import argparse
parser = argparse.ArgumentParser(
description="Render j2 templates",
formatter_class=argparse.ArgumentDefaultsHelpFormatter
)
parser.add_argument('input_files', help="Input files in the form of *.ext.j2", nargs='+')
parser.add_argument('--data', help="JSON data to use as additional input. Can optionally be a path to a file.", default={})
parser.add_argument('--extensions', help="jinja2 extensions to load", default=EXTENSIONS)
parser.add_argument('--no-clobber', action='store_true', help="If set, don't overwrite files.", default=False)
parser.add_argument('--pico8', action='store_true', help="Use alternate quote-based syntax", default=False)
return parser.parse_args()
def main():
global EXTENSIONS
global NO_CLOBBER
global PICO8_MODE
args = parse_args()
EXTENSIONS = args.extensions
NO_CLOBBER = args.no_clobber
PICO8_MODE = args.pico8
input_data = {}
if args.data:
if os.path.isfile(args.data):
with open(args.data, 'rb') as fp:
input_data = json.loads(fp.decode('utf-8'))
else:
input_data = json.loads(args.data)
for file in args.input_files:
try:
input_data.update({
'_filepath': os.path.normpath(file),
'_pathsplit': os.path.split(file),
'_splitext': os.path.splitext(file)
})
auto_render_template(file, input_data)
except IOError as e:
print(e)
continue
if __name__ == "__main__":
main()
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment