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annotate piecrust/commands/base.py @ 411:e7b865f8f335

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bake: Enable multiprocess baking. Baking is now done by running a worker per CPU, and sending jobs to them. This changes several things across the codebase: * Ability to not cache things related to pages other than the 'main' page (i.e. the page at the bottom of the execution stack). * Decouple the baking process from the bake records, so only the main process keeps track (and modifies) the bake record. * Remove the need for 'batch page getters' and loading a page directly from the page factories. There are various smaller changes too included here, including support for scope performance timers that are saved with the bake record and can be printed out to the console. Yes I got carried away. For testing, the in-memory 'mock' file-system doesn't work anymore, since we're spawning processes, so this is replaced by a 'tmpfs' file-system which is saved in temporary files on disk and deleted after tests have run.
author Ludovic Chabant <ludovic@chabant.com>
date Fri, 12 Jun 2015 17:09:19 -0700
parents c2ca72fb7f0b
children 456db44dcc53
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1 import logging
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2 import argparse
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3 import functools
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4 from piecrust.pathutil import SiteNotFoundError
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7 logger = logging.getLogger(__name__)
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10 class CommandContext(object):
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11 def __init__(self, app, parser, args):
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12 self.app = app
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13 self.parser = parser
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14 self.args = args
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17 class ChefCommand(object):
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18 def __init__(self):
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19 self.name = '__unknown__'
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20 self.description = '__unknown__'
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21 self.requires_website = True
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22 self.cache_name = 'default'
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23
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24 def setupParser(self, parser, app):
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25 raise NotImplementedError()
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27 def run(self, ctx):
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28 raise NotImplementedError("Command '%s' doesn't implement the `run` "
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29 "method." % type(self))
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30
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31 def checkedRun(self, ctx):
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32 if ctx.app.root_dir is None and self.requires_website:
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33 raise SiteNotFoundError()
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34 return self.run(ctx)
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37 class ExtendableChefCommand(ChefCommand):
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38 def __init__(self):
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39 super(ExtendableChefCommand, self).__init__()
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40 self._extensions = None
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41
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42 def getExtensions(self, app):
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43 self._loadExtensions(app)
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44 return self._extensions
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45
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46 def setupExtensionParsers(self, subparsers, app):
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47 for e in self.getExtensions(app):
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48 p = subparsers.add_parser(e.name, help=e.description)
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49 e.setupParser(p, app)
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50 p.set_defaults(sub_func=e.checkedRun)
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51
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52 def _loadExtensions(self, app):
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53 if self._extensions is not None:
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54 return
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55 self._extensions = []
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56 for e in app.plugin_loader.getCommandExtensions():
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57 if e.command_name == self.name and e.supports(app):
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58 self._extensions.append(e)
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59
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60
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61 class ChefCommandExtension(object):
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62 command_name = '__unknown__'
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63
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64 def supports(self, app):
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65 return True
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66
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67
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68 class HelpCommand(ExtendableChefCommand):
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69 def __init__(self):
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70 super(HelpCommand, self).__init__()
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71 self.name = 'help'
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72 self.description = "Prints help about PieCrust's chef."
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73 self.requires_website = False
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74 self._topic_providers = []
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75
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76 @property
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77 def has_topics(self):
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78 return len(self._topic_providers) > 0
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79
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80 def getTopics(self):
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81 return [(n, d) for (n, d, e) in self._topic_providers]
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82
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83 def setupParser(self, parser, app):
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84 parser.add_argument('topic', nargs='?',
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85 help="The command name or topic on which to get help.")
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86
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87 extensions = self.getExtensions(app)
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88 for ext in extensions:
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89 for name, desc in ext.getHelpTopics():
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90 self._topic_providers.append((name, desc, ext))
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91
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92 def run(self, ctx):
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93 topic = ctx.args.topic
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94
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95 if topic is None:
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96 ctx.parser.print_help()
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97 return 0
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98
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99 for name, desc, ext in self._topic_providers:
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100 if name == topic:
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101 print(ext.getHelpTopic(topic, ctx.app))
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102 return 0
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103
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104 for c in ctx.app.plugin_loader.getCommands():
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105 if c.name == topic:
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106 fake = argparse.ArgumentParser(
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107 prog='%s %s' % (ctx.parser.prog, c.name),
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108 description=c.description)
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109 c.setupParser(fake, ctx.app)
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110 fake.print_help()
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111 return 0
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112
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113 raise Exception("No such command or topic: %s" % topic)
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114
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115
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116 class _WrappedCommand(ChefCommand):
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117 def __init__(self, func, name, description):
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118 super(_WrappedCommand, self).__init__()
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119 self.func = func
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120 self.name = name
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121 self.description = description
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122
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123 def run(self, ctx):
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124 self.func(ctx)
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125
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126
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127 def simple_command(f, name, description=None):
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128 @functools.wraps(f)
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129 def wrapper(*args, **kwargs):
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130 return f(*args, **kwargs)
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131 cmd = _WrappedCommand(f, name, description)
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132 f.__command_class__ = cmd
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133 return wrapper
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 1
diff changeset
134
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 1
diff changeset
135
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 1
diff changeset
136 def get_func_command(f):
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 1
diff changeset
137 return getattr(f, '__command_class__')
f485ba500df3 Gigantic change to basically make PieCrust 2 vaguely functional.
Ludovic Chabant <ludovic@chabant.com>
parents: 1
diff changeset
138