Mercurial > hg > MakeItSo

annotate makeitso/makeitso.py @ 21:c879b93c3f15

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stub out fetching tempita from the internet; bitbucket is down, so no further work here atm
author Jeff Hammel <jhammel@mozilla.com>
date Sun, 21 Nov 2010 12:56:37 -0800
parents 1818cc524cde
children fc2867bc2ba6
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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 subprocess
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9 import sys
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10 import tempfile
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11 import urllib
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12
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13 from optparse import OptionParser
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14
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15 # URL of this file
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16 location = 'http://k0s.org/mozilla/hg/MakeItSo/raw-file/tip/makeitso/makeitso.py'
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17
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18 # URL of tempita
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19 tempita_location = 'http://bitbucket.org/ianb/tempita/raw-file/tip/tempita/'
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20
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21 try:
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22 import tempita
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23 except ImportError:
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24
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25 # Get tempita from the net
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26 def getFiles(url, files):
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27 """
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28 fetch files from the internet
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29 - url : base url
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30 - files : list of files to retrieve
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31 returns the location of a temporary directory
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32 """
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33
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34 raise NotImplementedError
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35
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36 # URL of this file
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37 location = 'http://k0s.org/mozilla/hg/MakeItSo/raw-file/tip/makeitso/makeitso.py'
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38
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39 # regular expressions for finding the shebang
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40 shebang_re = '#!.*makeitso.*'
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41 shebang_re = re.compile(shebang_re)
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42
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43 class MissingVariablesException(Exception):
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44 def __init__(self, message, missing):
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45 self.missing = missing
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46
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47 def call(command, *args, **kw):
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48 code = subprocess.call(command, *args, **kw)
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49 if code:
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50 if isinstance(command, basestring):
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51 cmdstr = command
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52 else:
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53 cmdstr = ' '.join(command)
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54 raise SystemExit("Command `%s` exited with code %d" % (cmdstr, code))
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55
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56 def get_missing(name_error):
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57 """
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58 This is a horrible hack because python doesn't do the proper thing
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59 via eval and return the name of the variable; instead, it just gives
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60 you a message:
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61 >>> try:
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62 ... eval('2*foo')
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63 ... except Exception, e:
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64 ... pass
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65 """
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66 message = name_error.args[0]
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67 varname = message.split("'")[1]
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68 return varname
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69
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70 def missing_variables(template, variables):
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71 """return additional variables needed"""
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72 vars = variables.copy()
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73 missing = set([])
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74 while True:
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75 try:
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76 template.substitute(**vars)
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77 return missing
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78 except NameError, e:
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79 missed = get_missing(e)
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80 missing.add(missed)
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81 vars[missed] = ''
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82 return missing
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83
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84 def template_variables(template):
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85 """return the variables needed for a template"""
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86 return missing_variables(template, {})
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87
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88 def read_variables(variables):
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89 retval = {}
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90 for i in variables:
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91 print 'Enter %s: ' % i,
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92 retval[i] = raw_input()
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93 return retval
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94
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95 def substitute(content, variables=None):
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96 """interactive (for now) substitution"""
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97
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98 # remove makeitso shebang if it has one
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99 if shebang_re.match(content):
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100 content = os.linesep.join(content.splitlines()[1:])
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101
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102 variables = variables or {}
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103 template = tempita.Template(content)
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104 missing = missing_variables(template, variables)
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105 if missing:
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106 # TODO: add a switch for interactive or not
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107 variables.update(read_variables(missing))
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108 return template.substitute(**variables)
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109
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110 def invocation(url, **variables):
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111 """returns a string appropriate for TTW invocation"""
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112 variables_string = ' '.join(['%s=%s' % (i,j) for i,j in variables.items()])
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113 return 'python <(curl %s) %s %s' % (location, url, variables_string)
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114
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115 def main(args=sys.argv[1:]):
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116
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117 # create option parser
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118 usage = '%prog [options] template <template> <...>'
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119 parser = OptionParser(usage, description=__doc__)
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120 parser.add_option('-[', '--start-braces', dest='start_braces',
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121 help='starting delimeter')
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122 parser.add_option('-]', '--end-braces', dest='end_braces',
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123 help='starting delimeter')
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124 parser.add_option('--in-place', dest='in_place',
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125 action='store_true', default=False,
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126 help='interpret files in place') # TODO: unused
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127 parser.add_option('--commandline', dest='commandline',
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128 action='store_true', default=False,
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129 help="print the commandline to invoke this script TTW")
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130 parser.add_option('--variables', dest='variables',
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131 action='store_true', default=False,
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132 help='print the variables in a template')
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133 options, args = parser.parse_args(args)
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134
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135 # print the variables for the templates
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136 if options.variables:
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137
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138 # makes no sense without a template
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139 if not args:
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140 parser.print_usage()
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141 parser.exit()
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142
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143 # find all variables
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144 variables = set()
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145 for arg in args:
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146 content = file(arg).read()
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147 template = tempita.Template(content)
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148 variables.update(template_variables(template))
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149
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150 # print them
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151 for variable in variables:
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152 print variable
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153 return
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154
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155 # template variables
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156 variables = {}
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157 _vars = []
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158 _args = []
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159 for arg in args:
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160 if '=' in arg:
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161 key, value = arg.split('=')
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162 variables[key] = value
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163 else:
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164 _args.append(arg)
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165 args = _args
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166
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167 # print TTW commandline for invocation
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168 if options.commandline:
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169 if args:
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170 for arg in args:
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171 print invocation(arg, **variables)
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172 else:
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173 print invocation('[URL]', **variables)
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174 return
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175
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176 # get the content
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177 if args:
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178 for arg in args:
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179 f, headers = urllib.urlretrieve(arg)
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180 content = file(f).read()
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181 print substitute(content, variables=variables)
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182 else:
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183 content = sys.stdin.read()
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184 print substitute(content, variables=variables)
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185
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186 if __name__ == '__main__':
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187 main()