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annotate makeitso/cli.py @ 60:da0d8c5c5157

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what i really meant to do with variables
author Jeff Hammel <jhammel@mozilla.com>
date Thu, 06 Jan 2011 17:12:36 -0800
parents 93f2b2c7f838
children 57f9b0349192
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1 """
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2 command line parser for MakeItSo
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3 """
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4
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5 from optparse import OptionParser
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6
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7 class MakeItSoCLI(object):
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8 """command line interface to a makeitso template"""
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9
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10 def __init__(self, template_class):
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11 self.template_class = template_class
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12
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13 def parser(self):
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14 """
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15 return a command line parser for the template
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16 """
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17 usage = '%prog [options] output [var1=value1] [var2=value2] [...]'
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18 description = getattr(self.template_class, 'description', None)
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19 parser = OptionParser(usage=usage, description=description)
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20
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21 # add the variables as options
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22 for variable in self.template_class.vars:
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23 parser.add_option('--%s' % variable.name, dest=variable.name,
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24 default=variable.default,
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25 help=variable.description)
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26
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27 # add CLI-specific options
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28 # should start with '_' to indicate reserved
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29 parser.add_option('--variables', dest='_print_variables',
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30 action='store_true', default=False,
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31 help="display variables in the template")
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32 return parser
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33
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34 def parse(self):
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35 parser = self.parser()
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36 options, args = parser.parse_args()
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37
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38 # print the variables for the templates
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39 if options._print_variables:
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40
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41 # find all variables
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42 template = self.template()
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43 variables = template.variables()
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44
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45 # print them
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46 for variable in sorted(variables):
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47 print variable
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48 return
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49
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50 # ensure output is given
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51 if len(args) != 1:
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52 parser.error("Please specify one output")
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54 # template variables
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55 variables = dict([(key, value)
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56 for key, value in options.__dict__.items()
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57 if not key.startswith('_')])
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59 # instantiate the template
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60 template = self.template_class(output=args[0], variables=variables)
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62 return template