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annotate piecrust/commands/base.py @ 36:485682a6de50

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New site layout support.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 20 Aug 2014 23:16:51 -0700
parents f485ba500df3
children c8c522dacfea
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1 import logging
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2 import functools
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3 from piecrust.pathutil import SiteNotFoundError
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6 logger = logging.getLogger(__name__)
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9 class CommandContext(object):
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10 def __init__(self, app, args):
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11 self.app = app
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12 self.args = args
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13 self.result = 0
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16 class ChefCommand(object):
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17 def __init__(self):
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18 self.name = '__unknown__'
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19 self.description = '__unknown__'
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20 self.requires_website = True
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21
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22 def setupParser(self, parser, app):
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23 raise NotImplementedError()
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24
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25 def run(self, ctx):
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26 raise NotImplementedError()
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27
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28 def _runFromChef(self, app, res):
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29 if app.root_dir is None and self.requires_website:
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30 raise SiteNotFoundError()
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31 ctx = CommandContext(app, res)
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32 self.run(ctx)
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33 return ctx.result
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35
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36 class ExtendableChefCommand(ChefCommand):
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37 def __init__(self):
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38 super(ExtendableChefCommand, self).__init__()
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39 self._extensions = None
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40
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41 def setupParser(self, parser, app):
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42 self._loadExtensions(app)
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43 subparsers = parser.add_subparsers()
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44 for e in self._extensions:
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45 p = subparsers.add_parser(e.name, help=e.description)
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46 e.setupParser(p, app)
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47 p.set_defaults(func=e._runFromChef)
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48
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49 def _loadExtensions(self, app):
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50 if self._extensions is not None:
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51 return
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52 self._extensions = []
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53 for e in app.plugin_loader.getCommandExtensions():
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54 if e.command_name == self.name and e.supports(app):
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55 self._extensions.append(e)
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56
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57
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58 class ChefCommandExtension(ChefCommand):
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59 def __init__(self):
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60 super(ChefCommandExtension, self).__init__()
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61 self.command_name = '__unknown__'
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62
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63 def supports(self, app):
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64 return True
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66
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67 class _WrappedCommand(ChefCommand):
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68 def __init__(self, func, name, description):
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69 super(_WrappedCommand, self).__init__()
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70 self.func = func
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71 self.name = name
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72 self.description = description
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73
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74 def run(self, ctx):
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75 self.func(ctx)
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78 def simple_command(f, name, description=None):
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79 @functools.wraps(f)
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80 def wrapper(*args, **kwargs):
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81 return f(*args, **kwargs)
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82 cmd = _WrappedCommand(f, name, description)
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83 f.__command_class__ = cmd
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84 return wrapper
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86
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87 def get_func_command(f):
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88 return getattr(f, '__command_class__')
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89