Render template by using Django template system.

render.py

#!/usr/bin/python

"""
render.py
Render template by using Django template system.
Copyright (c) 2013 Dragan Bosnjak <[email protected]>
License: MIT
"""

import argparse
from django import template
from django.utils.safestring import mark_safe
from django.conf import settings


def main():

    settings.configure()

    parser = argparse.ArgumentParser(description='Render template by using Django template system.',
                                     epilog='Example: render.py -s "{{ greeting }}, my name is {{ name }}." greeting "Hi" name "Ron Burgundy"'
                                     )

    parser.add_argument('-s', '--string', type=str, help="Template as a string")
    parser.add_argument('-i', '--input', type=str, help="Input file name")
    parser.add_argument('-o', '--output', type=str, help="Output file name")
    parser.add_argument('-f', '--autoescape-off', dest='autoescape_off', action='store_true', help="Prevent automatic HTML escaping")
    parser.add_argument('context', type=str, nargs=argparse.REMAINDER, help='List of variable names and values separated by spaces', metavar='NAME VALUE')

    args = parser.parse_args()

    context = template.Context()
    if args.context:
        while args.context:
            key = args.context.pop(0)
            if not args.context:
                parser.error('Invalid context: missing value for key "%s"!' % key)
            if args.autoescape_off:
                context[key] = mark_safe(args.context.pop(0))
            else:
                context[key] = args.context.pop(0)

    if bool(args.string) == bool(args.input):
        parser.error('You must specifiy either input or string argument!')
    elif args.input:
        tpl = open(args.input, "r").read()
    else:
        tpl = args.string

    result = template.Template(tpl).render(context)

    if args.output:
        open(args.output, 'w').write(result)
    else:
        print result

if __name__ == "__main__":
    main()