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# coding: utf-8
"""
This module provides command-line access to pystache.
Run this script using the -h option for command-line help.
"""
try:
import json
except:
# The json module is new in Python 2.6, whereas simplejson is
# compatible with earlier versions.
try:
import simplejson as json
except ImportError:
# Raise an error with a type different from ImportError as a hack around
# this issue:
# http://bugs.python.org/issue7559
from sys import exc_info
ex_type, ex_value, tb = exc_info()
new_ex = Exception("%s: %s" % (ex_type.__name__, ex_value))
raise new_ex.__class__, new_ex, tb
# The optparse module is deprecated in Python 2.7 in favor of argparse.
# However, argparse is not available in Python 2.6 and earlier.
from optparse import OptionParser
import sys
# We use absolute imports here to allow use of this script from its
# location in source control (e.g. for development purposes).
# Otherwise, the following error occurs:
#
# ValueError: Attempted relative import in non-package
#
from pystache.common import TemplateNotFoundError
from pystache.renderer import Renderer
USAGE = """\
%prog [-h] template context
Render a mustache template with the given context.
positional arguments:
template A filename or template string.
context A filename or JSON string."""
def parse_args(sys_argv, usage):
"""
Return an OptionParser for the script.
"""
args = sys_argv[1:]
parser = OptionParser(usage=usage)
options, args = parser.parse_args(args)
try:
template, context = args
except ValueError as e:
print('ERROR: %s' % e)
exit(1)
except UnboundLocalError as e:
print('ERROR: %s' % e)
exit(1)
return template, context
# TODO: verify whether the setup() method's entry_points argument
# supports passing arguments to main:
#
# http://packages.python.org/distribute/setuptools.html#automatic-script-creation
#
def main(sys_argv=sys.argv):
template, context = parse_args(sys_argv, USAGE)
if template.endswith('.mustache'):
template = template[:-9]
renderer = Renderer()
try:
template = renderer.load_template(template)
except TemplateNotFoundError:
pass
try:
context = json.load(open(context))
except IOError:
context = json.loads(context)
rendered = renderer.render(template, context)
print rendered
if __name__=='__main__':
main()
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