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annotate piecrust/main.py @ 663:3ceeca7bb71c

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themes: Add support for a `--theme` argument to `chef`.
author Ludovic Chabant <ludovic@chabant.com>
date Tue, 01 Mar 2016 22:27:28 -0800
parents 9dd2f68f243b
children 81d9c3a3a0b5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2edaefcb82cd chef: Add `--pid-file` option.
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1 import os
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2 import os.path
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8703be118430 Changes to `help` command and extendable commands:
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3 import io
3
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4 import sys
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5 import time
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6 import logging
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7 import argparse
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8 import colorama
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cb1ed436642c Always use version generated by `setup.py`. Better version generation.
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9 from piecrust import APP_VERSION
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10 from piecrust.app import (
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11 PieCrust, PieCrustConfiguration, apply_variant_and_values)
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bd726306d4dc chef: Add a `--config-set` option to set ad-hoc site configuration settings.
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12 from piecrust.chefutil import (
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13 format_timed, log_friendly_exception, print_help_item)
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c8c522dacfea Add `help` function, cleanup argument handling.
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14 from piecrust.commands.base import CommandContext
3
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15 from piecrust.pathutil import SiteNotFoundError, find_app_root
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16 from piecrust.plugins.base import PluginLoader
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17
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18
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19 logger = logging.getLogger(__name__)
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20
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21
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22 class ColoredFormatter(logging.Formatter):
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23 COLORS = {
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24 'DEBUG': colorama.Fore.BLACK + colorama.Style.BRIGHT,
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25 'INFO': '',
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26 'WARNING': colorama.Fore.YELLOW,
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27 'ERROR': colorama.Fore.RED,
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28 'CRITICAL': colorama.Back.RED + colorama.Fore.WHITE
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29 }
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30
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31 def __init__(self, fmt=None, datefmt=None):
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32 super(ColoredFormatter, self).__init__(fmt, datefmt)
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33
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34 def format(self, record):
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35 color = self.COLORS.get(record.levelname)
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36 res = super(ColoredFormatter, self).format(record)
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37 if color:
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38 res = color + res + colorama.Style.RESET_ALL
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39 return res
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40
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41
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42 class NullPieCrust:
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43 def __init__(self, theme_site=False):
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44 self.theme_site = theme_site
3
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45 self.root_dir = None
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46 self.debug = False
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47 self.templates_dirs = []
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48 self.theme_dir = None
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49 self.cache_dir = None
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50 self.config = PieCrustConfiguration()
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51 self.plugin_loader = PluginLoader(self)
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52 self.env = None
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53
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54 def useSubCache(self, cache_name, cache_key):
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55 pass
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56
3
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57
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58 def main():
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59 if sys.platform == 'darwin':
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60 # There's a bug on MacOSX that can cause Python to be confused
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61 # about the locale. Let's try to fix that.
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62 # See: http://bugs.python.org/issue18378
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63 import locale
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64 try:
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65 locale.getdefaultlocale()
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66 except ValueError:
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67 locale.setlocale(locale.LC_ALL, 'en_US.UTF-8')
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68
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d241585412ad internal: Make it possible to pass `argv` to the main Chef function.
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69 argv = sys.argv[1:]
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70 pre_args = _pre_parse_chef_args(argv)
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71 try:
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72 exit_code = _run_chef(pre_args, argv)
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73 except Exception as ex:
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74 if pre_args.debug:
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75 logger.exception(ex)
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76 else:
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77 log_friendly_exception(logger, ex)
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78 exit_code = 1
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79 sys.exit(exit_code)
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80
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81
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82 def _setup_main_parser_arguments(parser):
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83 parser.add_argument(
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84 '--version',
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85 action='version',
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86 version=('%(prog)s ' + APP_VERSION))
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87 parser.add_argument(
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88 '--root',
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89 help="The root directory of the website.")
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90 parser.add_argument(
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91 '--theme',
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92 action='store_true',
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93 help="Makes the current command apply to a theme website.")
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94 parser.add_argument(
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95 '--config',
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96 dest='config_variant',
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97 help="The configuration variant to use for this command.")
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98 parser.add_argument(
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99 '--config-set',
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100 nargs=2,
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101 metavar=('NAME', 'VALUE'),
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102 action='append',
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103 dest='config_values',
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104 help="Sets a specific site configuration setting.")
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105 parser.add_argument(
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106 '--debug',
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107 help="Show debug information.", action='store_true')
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108 parser.add_argument(
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109 '--debug-only',
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110 nargs='*',
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111 help="Only show debug information for the given categories.")
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112 parser.add_argument(
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113 '--no-cache',
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114 help="When applicable, disable caching.",
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115 action='store_true')
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116 parser.add_argument(
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117 '--quiet',
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118 help="Print only important information.",
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119 action='store_true')
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120 parser.add_argument(
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121 '--log',
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122 dest='log_file',
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123 help="Send log messages to the specified file.")
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124 parser.add_argument(
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125 '--log-debug',
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126 help="Log debug messages to the log file.",
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127 action='store_true')
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128 parser.add_argument(
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129 '--no-color',
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130 help="Don't use colorized output.",
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131 action='store_true')
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132 parser.add_argument(
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133 '--pid-file',
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134 dest='pid_file',
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135 help="Write a PID file for the current process.")
38
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diff changeset
136
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diff changeset
137
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diff changeset
138 def _pre_parse_chef_args(argv):
3
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139 # We need to parse some arguments before we can build the actual argument
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140 # parser, because it can affect which plugins will be loaded. Also, log-
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141 # related arguments must be parsed first because we want to log everything
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142 # from the beginning.
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143 parser = argparse.ArgumentParser()
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144 _setup_main_parser_arguments(parser)
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145 parser.add_argument('args', nargs=argparse.REMAINDER)
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146 res, _ = parser.parse_known_args(argv)
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147
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148 # Setup the logger.
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149 if res.debug and res.quiet:
3
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150 raise Exception("You can't specify both --debug and --quiet.")
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151
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diff changeset
152 strip_colors = None
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diff changeset
153 if res.no_color:
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diff changeset
154 strip_colors = True
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155
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diff changeset
156 colorama.init(strip=strip_colors)
3
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157 root_logger = logging.getLogger()
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158 root_logger.setLevel(logging.INFO)
97
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diff changeset
159 if res.debug or res.log_debug:
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160 root_logger.setLevel(logging.DEBUG)
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diff changeset
161
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162 if res.debug_only:
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163 for n in res.debug_only:
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164 logging.getLogger(n).setLevel(logging.DEBUG)
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diff changeset
165
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166 log_handler = logging.StreamHandler(sys.stdout)
564
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diff changeset
167 if res.debug or res.debug_only:
97
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diff changeset
168 log_handler.setLevel(logging.DEBUG)
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169 log_handler.setFormatter(ColoredFormatter("[%(name)s] %(message)s"))
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170 else:
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diff changeset
171 if res.quiet:
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diff changeset
172 log_handler.setLevel(logging.WARNING)
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173 else:
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174 log_handler.setLevel(logging.INFO)
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175 log_handler.setFormatter(ColoredFormatter("%(message)s"))
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176 root_logger.addHandler(log_handler)
97
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diff changeset
177
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diff changeset
178 if res.log_file:
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diff changeset
179 file_handler = logging.FileHandler(res.log_file, mode='w')
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180 root_logger.addHandler(file_handler)
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diff changeset
181 if res.log_debug:
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diff changeset
182 file_handler.setLevel(logging.DEBUG)
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diff changeset
183
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184 # PID file.
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185 if res.pid_file:
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diff changeset
186 try:
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187 pid_file_dir = os.path.dirname(res.pid_file)
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188 if pid_file_dir and not os.path.isdir(pid_file_dir):
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189 os.makedirs(pid_file_dir)
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190
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191 with open(res.pid_file, 'w') as fp:
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192 fp.write(str(os.getpid()))
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diff changeset
193 except OSError as ex:
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194 raise Exception("Can't write PID file: %s" % res.pid_file) from ex
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diff changeset
195
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diff changeset
196 return res
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diff changeset
197
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198
384
d241585412ad internal: Make it possible to pass `argv` to the main Chef function.
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diff changeset
199 def _run_chef(pre_args, argv):
3
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200 # Setup the app.
489
186a29f61ddc internal: Fix timing info.
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diff changeset
201 start_time = time.perf_counter()
583
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202 root = None
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203 if pre_args.root:
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204 root = os.path.expanduser(pre_args.root)
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diff changeset
205 else:
38
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diff changeset
206 try:
663
3ceeca7bb71c themes: Add support for a `--theme` argument to `chef`.
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diff changeset
207 root = find_app_root(theme=pre_args.theme)
38
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diff changeset
208 except SiteNotFoundError:
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diff changeset
209 root = None
3
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210
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diff changeset
211 if not root:
663
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diff changeset
212 app = NullPieCrust(
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diff changeset
213 theme_site=pre_args.theme)
3
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diff changeset
214 else:
663
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diff changeset
215 app = PieCrust(
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diff changeset
216 root,
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diff changeset
217 theme_site=pre_args.theme,
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diff changeset
218 cache=(not pre_args.no_cache),
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diff changeset
219 debug=pre_args.debug)
3
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diff changeset
220
371
c2ca72fb7f0b caching: Use separate caches for config variants and other contexts.
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diff changeset
221 # Build a hash for a custom cache directory.
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diff changeset
222 cache_key = 'default'
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diff changeset
223
466
456db44dcc53 bake: Pass the config variants and values from the CLI to the baker.
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parents: 384
diff changeset
224 # Handle custom configurations.
632
9dd2f68f243b chef: Fix the `--config-set` option.
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parents: 612
diff changeset
225 if (pre_args.config_variant or pre_args.config_values) and not root:
9dd2f68f243b chef: Fix the `--config-set` option.
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parents: 612
diff changeset
226 raise SiteNotFoundError(
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diff changeset
227 "Can't apply any configuration variant or value overrides, "
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parents: 612
diff changeset
228 "there is no website here.")
467
a8028bf329a2 bug: Fix CLI crash caused by configuration variants.
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parents: 466
diff changeset
229 apply_variant_and_values(app, pre_args.config_variant,
466
456db44dcc53 bake: Pass the config variants and values from the CLI to the baker.
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parents: 384
diff changeset
230 pre_args.config_values)
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parents: 384
diff changeset
231
456db44dcc53 bake: Pass the config variants and values from the CLI to the baker.
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diff changeset
232 # Adjust the cache key.
38
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diff changeset
233 if pre_args.config_variant is not None:
371
c2ca72fb7f0b caching: Use separate caches for config variants and other contexts.
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parents: 342
diff changeset
234 cache_key += ',variant=%s' % pre_args.config_variant
583
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diff changeset
235 if pre_args.config_values:
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diff changeset
236 for name, value in pre_args.config_values:
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diff changeset
237 cache_key += ',%s=%s' % (name, value)
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238
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239 # Setup the arg parser.
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240 parser = argparse.ArgumentParser(
57
c8c522dacfea Add `help` function, cleanup argument handling.
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parents: 44
diff changeset
241 prog='chef',
99
8703be118430 Changes to `help` command and extendable commands:
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parents: 98
diff changeset
242 description="The PieCrust chef manages your website.",
8703be118430 Changes to `help` command and extendable commands:
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diff changeset
243 formatter_class=argparse.RawDescriptionHelpFormatter)
583
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diff changeset
244 _setup_main_parser_arguments(parser)
3
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diff changeset
245
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diff changeset
246 commands = sorted(app.plugin_loader.getCommands(),
341
bd726306d4dc chef: Add a `--config-set` option to set ad-hoc site configuration settings.
Ludovic Chabant <ludovic@chabant.com>
parents: 307
diff changeset
247 key=lambda c: c.name)
99
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diff changeset
248 subparsers = parser.add_subparsers(title='list of commands')
3
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diff changeset
249 for c in commands:
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diff changeset
250 p = subparsers.add_parser(c.name, help=c.description)
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diff changeset
251 c.setupParser(p, app)
57
c8c522dacfea Add `help` function, cleanup argument handling.
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parents: 44
diff changeset
252 p.set_defaults(func=c.checkedRun)
371
c2ca72fb7f0b caching: Use separate caches for config variants and other contexts.
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parents: 342
diff changeset
253 p.set_defaults(cache_name=c.cache_name)
99
8703be118430 Changes to `help` command and extendable commands:
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parents: 98
diff changeset
254
57
c8c522dacfea Add `help` function, cleanup argument handling.
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parents: 44
diff changeset
255 help_cmd = next(filter(lambda c: c.name == 'help', commands), None)
c8c522dacfea Add `help` function, cleanup argument handling.
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parents: 44
diff changeset
256 if help_cmd and help_cmd.has_topics:
99
8703be118430 Changes to `help` command and extendable commands:
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parents: 98
diff changeset
257 with io.StringIO() as epilog:
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parents: 98
diff changeset
258 epilog.write("additional help topics:\n")
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259 for name, desc in help_cmd.getTopics():
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260 print_help_item(epilog, name, desc)
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261 parser.epilog = epilog.getvalue()
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262
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263 # Parse the command line.
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264 result = parser.parse_args(argv)
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265 logger.debug(format_timed(start_time, 'initialized PieCrust',
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266 colored=False))
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267
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268 # Print the help if no command was specified.
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269 if not hasattr(result, 'func'):
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270 parser.print_help()
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271 return 0
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272
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273 # Use a customized cache for the command and current config.
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274 if result.cache_name != 'default' or cache_key != 'default':
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275 app.useSubCache(result.cache_name, cache_key)
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276
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277 # Run the command!
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278 ctx = CommandContext(app, parser, result)
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279 ctx.config_variant = pre_args.config_variant
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280 ctx.config_values = pre_args.config_values
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281
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282 exit_code = result.func(ctx)
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283 if exit_code is None:
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284 return 0
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285 if not isinstance(exit_code, int):
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286 logger.error("Got non-integer exit code: %s" % exit_code)
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287 return -1
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288 return exit_code
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289