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# $Id: TemplateCmdLineIface.py,v 1.13 2006/01/10 20:34:35 tavis_rudd Exp $
"""Provides a command line interface to compiled Cheetah template modules.
Meta-Data
================================================================================
Author: Tavis Rudd <tavis@damnsimple.com>
Version: $Revision: 1.13 $
Start Date: 2001/12/06
Last Revision Date: $Date: 2006/01/10 20:34:35 $
"""
__author__ = "Tavis Rudd <tavis@damnsimple.com>"
__revision__ = "$Revision: 1.13 $"[11:-2]
import sys
import os
import getopt
import os.path
try:
from cPickle import load
except ImportError:
from pickle import load
from Cheetah.Version import Version
class Error(Exception):
pass
class CmdLineIface:
"""A command line interface to compiled Cheetah template modules."""
def __init__(self, templateObj,
scriptName=os.path.basename(sys.argv[0]),
cmdLineArgs=sys.argv[1:]):
self._template = templateObj
self._scriptName = scriptName
self._cmdLineArgs = cmdLineArgs
def run(self):
"""The main program controller."""
self._processCmdLineArgs()
print(self._template)
def _processCmdLineArgs(self):
try:
self._opts, self._args = getopt.getopt(
self._cmdLineArgs, 'h', ['help',
'env',
'pickle=',
])
except getopt.GetoptError, v:
# print help information and exit:
print(v)
print(self.usage())
sys.exit(2)
for o, a in self._opts:
if o in ('-h', '--help'):
print(self.usage())
sys.exit()
if o == '--env':
self._template.searchList().insert(0, os.environ)
if o == '--pickle':
if a == '-':
unpickled = load(sys.stdin)
self._template.searchList().insert(0, unpickled)
else:
f = open(a)
unpickled = load(f)
f.close()
self._template.searchList().insert(0, unpickled)
def usage(self):
return """Cheetah %(Version)s template module command-line interface
Usage
-----
%(scriptName)s [OPTION]
Options
-------
-h, --help Print this help information
--env Use shell ENVIRONMENT variables to fill the
$placeholders in the template.
--pickle <file> Use a variables from a dictionary stored in Python
pickle file to fill $placeholders in the template.
If <file> is - stdin is used:
'%(scriptName)s --pickle -'
Description
-----------
This interface allows you to execute a Cheetah template from the command line
and collect the output. It can prepend the shell ENVIRONMENT or a pickled
Python dictionary to the template's $placeholder searchList, overriding the
defaults for the $placeholders.
""" % {'scriptName': self._scriptName,
'Version': Version,
}
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