Mercurial > piecrust2

annotate piecrust/main.py @ 98:5959a117a943

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author Ludovic Chabant <ludovic@chabant.com>
date Mon, 08 Sep 2014 00:04:29 -0700
parents 00a9b24ca944
children 8703be118430
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1 import sys
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2 import time
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3 import os.path
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4 import logging
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5 import argparse
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6 import colorama
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7 from piecrust import APP_VERSION
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8 from piecrust.app import PieCrust, PieCrustConfiguration
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9 from piecrust.chefutil import format_timed, log_friendly_exception
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10 from piecrust.commands.base import CommandContext
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11 from piecrust.environment import StandardEnvironment
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12 from piecrust.pathutil import SiteNotFoundError, find_app_root
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13 from piecrust.plugins.base import PluginLoader
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14
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15
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16 logger = logging.getLogger(__name__)
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17
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18
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19 class ColoredFormatter(logging.Formatter):
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20 COLORS = {
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21 'DEBUG': colorama.Fore.BLACK + colorama.Style.BRIGHT,
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22 'INFO': '',
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23 'WARNING': colorama.Fore.YELLOW,
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24 'ERROR': colorama.Fore.RED,
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25 'CRITICAL': colorama.Back.RED + colorama.Fore.WHITE
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26 }
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27
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28 def __init__(self, fmt=None, datefmt=None):
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29 super(ColoredFormatter, self).__init__(fmt, datefmt)
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30
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31 def format(self, record):
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32 color = self.COLORS.get(record.levelname)
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33 res = super(ColoredFormatter, self).format(record)
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34 if color:
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35 res = color + res + colorama.Style.RESET_ALL
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36 return res
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38
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39 class NullPieCrust:
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40 def __init__(self):
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41 self.root_dir = None
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42 self.debug = False
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43 self.templates_dirs = []
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44 self.plugins_dirs = []
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45 self.theme_dir = None
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46 self.cache_dir = None
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47 self.config = PieCrustConfiguration()
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48 self.plugin_loader = PluginLoader(self)
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49 self.env = StandardEnvironment()
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50 self.env.initialize(self)
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51
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52
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53 def main():
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54 argv = sys.argv
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55 pre_args = _pre_parse_chef_args(argv)
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56 try:
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57 exit_code = _run_chef(pre_args)
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58 except Exception as ex:
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59 if pre_args.debug:
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60 logger.exception(ex)
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61 else:
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62 log_friendly_exception(logger, ex)
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63 exit_code = 1
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64 sys.exit(exit_code)
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65
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66
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67 class PreParsedChefArgs(object):
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68 def __init__(self, root=None, cache=True, debug=False, quiet=False,
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69 log_file=None, log_debug=False, config_variant=None):
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70 self.root = root
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71 self.cache = cache
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72 self.debug = debug
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73 self.quiet = quiet
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74 self.log_file = log_file
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75 self.log_debug = log_debug
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76 self.config_variant = config_variant
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78
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79 def _pre_parse_chef_args(argv):
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80 # We need to parse some arguments before we can build the actual argument
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81 # parser, because it can affect which plugins will be loaded. Also, log-
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82 # related arguments must be parsed first because we want to log everything
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83 # from the beginning.
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84 res = PreParsedChefArgs()
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85 i = 1
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86 while i < len(argv):
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87 arg = argv[i]
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88 if arg.startswith('--root='):
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89 res.root = os.path.expanduser(arg[len('--root='):])
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90 elif arg == '--root':
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91 res.root = argv[i + 1]
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92 ++i
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93 elif arg.startswith('--config='):
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94 res.config_variant = arg[len('--config='):]
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95 elif arg == '--config':
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96 res.config_variant = argv[i + 1]
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97 ++i
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98 elif arg == '--log':
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99 res.log_file = argv[i + 1]
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100 ++i
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101 elif arg == '--log-debug':
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102 res.log_debug = True
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103 elif arg == '--no-cache':
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104 res.cache = False
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105 elif arg == '--debug':
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106 res.debug = True
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107 elif arg == '--quiet':
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108 res.quiet = True
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109
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110 if arg[0] != '-':
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111 break
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112
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113 i = i + 1
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114
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115 # Setup the logger.
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116 if res.debug and res.quiet:
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117 raise Exception("You can't specify both --debug and --quiet.")
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118
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119 colorama.init()
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120 root_logger = logging.getLogger()
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121 root_logger.setLevel(logging.INFO)
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122 if res.debug or res.log_debug:
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123 root_logger.setLevel(logging.DEBUG)
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124
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125 log_handler = logging.StreamHandler(sys.stdout)
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126 if res.debug:
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127 log_handler.setLevel(logging.DEBUG)
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128 log_handler.setFormatter(ColoredFormatter("[%(name)s] %(message)s"))
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129 else:
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130 if res.quiet:
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131 log_handler.setLevel(logging.WARNING)
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132 else:
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133 log_handler.setLevel(logging.INFO)
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134 log_handler.setFormatter(ColoredFormatter("%(message)s"))
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135 root_logger.addHandler(log_handler)
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136
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137 if res.log_file:
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138 file_handler = logging.FileHandler(res.log_file, mode='w')
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139 root_logger.addHandler(file_handler)
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140 if res.log_debug:
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141 file_handler.setLevel(logging.DEBUG)
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142
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143 return res
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144
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145
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146 def _run_chef(pre_args):
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147 # Setup the app.
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148 start_time = time.clock()
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149 root = pre_args.root
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150 if root is None:
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151 try:
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152 root = find_app_root()
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153 except SiteNotFoundError:
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154 root = None
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155
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156 if not root:
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157 app = NullPieCrust()
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158 else:
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159 app = PieCrust(root, cache=pre_args.cache, debug=pre_args.debug)
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160
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161 # Handle a configuration variant.
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162 if pre_args.config_variant is not None:
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163 if not root:
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164 raise SiteNotFoundError("Can't apply any variant.")
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165 app.config.applyVariant('variants/' + pre_args.config_variant)
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166
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167 # Setup the arg parser.
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168 parser = argparse.ArgumentParser(
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169 prog='chef',
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170 description="The PieCrust chef manages your website.")
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171 parser.add_argument('--version', action='version', version=('%(prog)s ' + APP_VERSION))
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172 parser.add_argument('--root', help="The root directory of the website.")
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173 parser.add_argument('--config', help="The configuration variant to use for this command.")
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174 parser.add_argument('--debug', help="Show debug information.", action='store_true')
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175 parser.add_argument('--no-cache', help="When applicable, disable caching.", action='store_true')
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176 parser.add_argument('--quiet', help="Print only important information.", action='store_true')
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177 parser.add_argument('--log', help="Send log messages to the specified file.")
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178 parser.add_argument('--log-debug', help="Log debug messages to the log file.", action='store_true')
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179
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180 commands = sorted(app.plugin_loader.getCommands(),
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181 key=lambda c: c.name)
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182 subparsers = parser.add_subparsers()
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183 for c in commands:
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184 p = subparsers.add_parser(c.name, help=c.description)
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185 c.setupParser(p, app)
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186 p.set_defaults(func=c.checkedRun)
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187 help_cmd = next(filter(lambda c: c.name == 'help', commands), None)
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188 if help_cmd and help_cmd.has_topics:
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189 parser.epilog = ("Additional help topics: " +
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190 ', '.join(help_cmd.getTopicNames()))
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191
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192
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193 # Parse the command line.
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194 result = parser.parse_args()
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195 logger.debug(format_timed(start_time, 'initialized PieCrust', colored=False))
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196
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197 # Print the help if no command was specified.
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198 if not hasattr(result, 'func'):
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199 parser.print_help()
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200 return 0
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201
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202 # Run the command!
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203 ctx = CommandContext(app, parser, result)
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204 exit_code = result.func(ctx)
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205 if exit_code is None:
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206 return 0
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207 if not isinstance(exit_code, int):
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208 logger.error("Got non-integer exit code: %s" % exit_code)
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209 return -1
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210 return exit_code
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211