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annotate makeitso/makeitso.py @ 25:fbf19940fa97

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remove the staging directory you attempted to download
author Jeff Hammel <jhammel@mozilla.com>
date Tue, 30 Nov 2010 09:23:46 -0800
parents 1b802678b341
children 044ac9e0b29c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 """
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3 filesystem template interpreter
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4 """
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5
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6 import os
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7 import re
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8 import shutil
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9 import subprocess
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10 import sys
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11 import tempfile
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12 import urllib
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13 # TODO: may have to use urllib2.urlopen to get reasonable timeouts
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14
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15 from optparse import OptionParser
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16
21
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17 # URL of this file
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18 location = 'http://k0s.org/mozilla/hg/MakeItSo/raw-file/tip/makeitso/makeitso.py'
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19
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20 # URL of tempita
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21 tempita_location = 'http://bitbucket.org/ianb/tempita/raw-file/tip/tempita/'
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22
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23 def cleanup():
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24
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25 # remove temporary net module directory
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26 if 'tempdir' in globals():
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27 shutil.remove(tempdir)
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29 try:
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30 import tempita
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31 except ImportError:
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32
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33 # Get tempita from the net
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34 # TODO: abstract this to get arbitrary modules from the net
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35 def getFiles(url, subdir, files):
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36 """
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37 fetch files from the internet
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38 - url : base url
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39 - subdirectory: to put things in
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40 - files : list of files to retrieve
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41 returns the location of a temporary directory
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42 """
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43 globals()['tempdir'] = tempfile.mkdtemp()
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44 os.mkdir(subdir)
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45 url = url.rstrip('/')
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46 for filename in files:
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47 f, headers = urllib.urlretrive('%s/%s' % (url, filename))
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48 content = file(f).read()
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49 outfile = os.path.join(globals()['tempdir'], subdir, filename)
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50 o = file(outfile, 'w')
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51 print >> o, content
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52 return globals()['tempdir']
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53
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54 tempita_files = ['__init__.py', '_looper.py', 'compat3.py']
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55
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56 try:
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57 t = getFiles(tempita_location, 'tempita', tempita_files)
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58 sys.path.append(t)
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59 import tempita
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60 except:
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61 cleanup()
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62 raise NotImplementedError('This should say something like youre not connected to the net')
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63
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64
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65
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66 # regular expressions for finding the shebang
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67 shebang_re = '#!.*makeitso.*'
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68 shebang_re = re.compile(shebang_re)
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69
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70 class MissingVariablesException(Exception):
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71 def __init__(self, message, missing):
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72 self.missing = missing
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73
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74 def call(command, *args, **kw):
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75 code = subprocess.call(command, *args, **kw)
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76 if code:
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77 if isinstance(command, basestring):
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78 cmdstr = command
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79 else:
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80 cmdstr = ' '.join(command)
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81 raise SystemExit("Command `%s` exited with code %d" % (cmdstr, code))
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82
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83 def get_missing(name_error):
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84 """
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85 This is a horrible hack because python doesn't do the proper thing
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86 via eval and return the name of the variable; instead, it just gives
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87 you a message:
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88 >>> try:
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89 ... eval('2*foo')
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90 ... except Exception, e:
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91 ... pass
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92 """
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93 message = name_error.args[0]
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94 varname = message.split("'")[1]
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95 return varname
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96
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97 def missing_variables(template, variables):
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98 """return additional variables needed"""
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99 vars = variables.copy()
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100 missing = set([])
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101 while True:
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102 try:
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103 template.substitute(**vars)
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104 return missing
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105 except NameError, e:
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106 missed = get_missing(e)
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107 missing.add(missed)
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108 vars[missed] = ''
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109 return missing
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110
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111 def template_variables(template):
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112 """return the variables needed for a template"""
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113 return missing_variables(template, {})
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114
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115 def read_variables(variables):
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116 retval = {}
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117 for i in variables:
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118 print 'Enter %s: ' % i,
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119 retval[i] = raw_input()
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120 return retval
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121
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122 def substitute(content, variables=None):
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123 """interactive (for now) substitution"""
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124
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125 # remove makeitso shebang if it has one
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126 if shebang_re.match(content):
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127 content = os.linesep.join(content.splitlines()[1:])
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128
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129 variables = variables or {}
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130 template = tempita.Template(content)
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131 missing = missing_variables(template, variables)
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132 if missing:
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133 # TODO: add a switch for interactive or not
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134 variables.update(read_variables(missing))
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135 return template.substitute(**variables)
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136
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137 def invocation(url, **variables):
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138 """returns a string appropriate for TTW invocation"""
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139 variables_string = ' '.join(['%s=%s' % (i,j) for i,j in variables.items()])
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140 return 'python <(curl %s) %s %s' % (location, url, variables_string)
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141
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142 def main(args=sys.argv[1:]):
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143
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144 # create option parser
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145 usage = '%prog [options] template <template> <...>'
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146 parser = OptionParser(usage, description=__doc__)
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147 parser.add_option('-[', '--start-braces', dest='start_braces',
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148 help='starting delimeter')
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149 parser.add_option('-]', '--end-braces', dest='end_braces',
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150 help='starting delimeter')
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151 parser.add_option('--in-place', dest='in_place',
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152 action='store_true', default=False,
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153 help='interpret files in place') # TODO: unused
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154 parser.add_option('--commandline', dest='commandline',
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155 action='store_true', default=False,
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156 help="print the commandline to invoke this script TTW")
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157 parser.add_option('--variables', dest='variables',
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158 action='store_true', default=False,
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159 help='print the variables in a template')
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160 options, args = parser.parse_args(args)
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161
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162 # print the variables for the templates
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163 if options.variables:
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164
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165 # makes no sense without a template
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166 if not args:
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167 parser.print_usage()
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168 parser.exit()
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169
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170 # find all variables
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171 variables = set()
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172 for arg in args:
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173 content = file(arg).read()
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174 template = tempita.Template(content)
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175 variables.update(template_variables(template))
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176
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177 # print them
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178 for variable in variables:
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179 print variable
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180 return
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181
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182 # template variables
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183 variables = {}
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184 _vars = []
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185 _args = []
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186 for arg in args:
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187 if '=' in arg:
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188 key, value = arg.split('=')
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189 variables[key] = value
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190 else:
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191 _args.append(arg)
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192 args = _args
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193
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194 # print TTW commandline for invocation
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195 if options.commandline:
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196 if args:
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197 for arg in args:
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198 print invocation(arg, **variables)
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199 else:
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200 print invocation('[URL]', **variables)
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201 return
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202
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203 # get the content
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204 if args:
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205 for arg in args:
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206 f, headers = urllib.urlretrieve(arg)
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207 content = file(f).read()
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208 print substitute(content, variables=variables)
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209 else:
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210 content = sys.stdin.read()
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211 print substitute(content, variables=variables)
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212
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213 # cleanup
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214 cleanup()
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215
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216 if __name__ == '__main__':
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217 main()