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@@ -0,0 +1,108 b'' | |||||
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1 | # encoding: utf-8 | |||
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2 | """ | |||
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3 | A base class for a configurable application. | |||
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4 | ||||
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5 | Authors: | |||
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6 | ||||
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7 | * Brian Granger | |||
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8 | """ | |||
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9 | ||||
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10 | #----------------------------------------------------------------------------- | |||
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11 | # Copyright (C) 2008-2011 The IPython Development Team | |||
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12 | # | |||
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13 | # Distributed under the terms of the BSD License. The full license is in | |||
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14 | # the file COPYING, distributed as part of this software. | |||
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15 | #----------------------------------------------------------------------------- | |||
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16 | ||||
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17 | #----------------------------------------------------------------------------- | |||
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18 | # Imports | |||
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19 | #----------------------------------------------------------------------------- | |||
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20 | ||||
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21 | from copy import deepcopy | |||
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22 | import sys | |||
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23 | ||||
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24 | from IPython.config.configurable import Configurable | |||
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25 | from IPython.utils.traitlets import ( | |||
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26 | Unicode, List | |||
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27 | ) | |||
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28 | from IPython.config.loader import ( | |||
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29 | KeyValueConfigLoader, PyFileConfigLoader | |||
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30 | ) | |||
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31 | ||||
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32 | #----------------------------------------------------------------------------- | |||
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33 | # Application class | |||
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34 | #----------------------------------------------------------------------------- | |||
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35 | ||||
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36 | ||||
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37 | class Application(Configurable): | |||
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38 | ||||
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39 | # The name of the application, will usually match the name of the command | |||
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40 | # line application | |||
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41 | app_name = Unicode(u'application') | |||
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42 | ||||
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43 | # The description of the application that is printed at the beginning | |||
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44 | # of the help. | |||
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45 | description = Unicode(u'This is an application.') | |||
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46 | ||||
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47 | # A sequence of Configurable subclasses whose config=True attributes will | |||
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48 | # be exposed at the command line (shortnames and help). | |||
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49 | classes = List([]) | |||
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50 | ||||
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51 | # The version string of this application. | |||
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52 | version = Unicode(u'0.0') | |||
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53 | ||||
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54 | def __init__(self, **kwargs): | |||
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55 | Configurable.__init__(self, **kwargs) | |||
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56 | # Add my class to self.classes so my attributes appear in command line | |||
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57 | # options. | |||
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58 | self.classes.insert(0, self.__class__) | |||
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59 | ||||
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60 | def print_help(self): | |||
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61 | """Print the help for each Configurable class in self.classes.""" | |||
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62 | for cls in self.classes: | |||
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63 | cls.class_print_help() | |||
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64 | ||||
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65 | ||||
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66 | def print_description(self): | |||
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67 | """Print the application description.""" | |||
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68 | print self.description | |||
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69 | ||||
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70 | ||||
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71 | def print_version(self): | |||
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72 | """Print the version string.""" | |||
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73 | print self.version | |||
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74 | ||||
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75 | def update_config(self, config): | |||
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76 | # Save a copy of the current config. | |||
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77 | newconfig = deepcopy(self.config) | |||
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78 | # Merge the new config into the current one. | |||
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79 | newconfig._merge(config) | |||
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80 | # Save the combined config as self.config, which triggers the traits | |||
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81 | # events. | |||
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82 | self.config = config | |||
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83 | ||||
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84 | def parse_command_line(self, argv=None): | |||
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85 | """Parse the command line arguments.""" | |||
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86 | if argv is None: | |||
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87 | argv = sys.argv[1:] | |||
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88 | ||||
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89 | if '-h' in argv or '--h' in argv: | |||
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90 | self.print_description() | |||
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91 | self.print_help() | |||
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92 | sys.exit(1) | |||
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93 | ||||
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94 | if '--version' in argv: | |||
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95 | self.print_version() | |||
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96 | sys.exit(1) | |||
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97 | ||||
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98 | loader = KeyValueConfigLoader(argv=argv, classes=self.classes) | |||
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99 | config = loader.load_config() | |||
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100 | self.update_config(config) | |||
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101 | ||||
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102 | def load_config_file(self, filename, path=None): | |||
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103 | """Load a .py based config file by filename and path.""" | |||
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104 | # TODO: this raises IOError if filename does not exist. | |||
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105 | loader = PyFileConfigLoader(filename, path=path) | |||
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106 | config = loader.load_config() | |||
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107 | self.update_config(config) | |||
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108 |
@@ -22,9 +22,7 b' Authors:' | |||||
22 |
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22 | |||
23 | from copy import deepcopy |
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23 | from copy import deepcopy | |
24 | import datetime |
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24 | import datetime | |
25 | from weakref import WeakValueDictionary |
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26 |
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25 | |||
27 | from IPython.utils.importstring import import_item |
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28 | from loader import Config |
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26 | from loader import Config | |
29 | from IPython.utils.traitlets import HasTraits, Instance |
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27 | from IPython.utils.traitlets import HasTraits, Instance | |
30 | from IPython.utils.text import indent |
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28 | from IPython.utils.text import indent | |
@@ -152,13 +150,18 b' class Configurable(HasTraits):' | |||||
152 |
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150 | |||
153 | @classmethod |
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151 | @classmethod | |
154 | def class_get_help(cls): |
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152 | def class_get_help(cls): | |
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153 | """Get the help string for this class in ReST format.""" | |||
155 | cls_traits = cls.class_traits(config=True) |
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154 | cls_traits = cls.class_traits(config=True) | |
156 | final_help = [] |
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155 | final_help = [] | |
157 | final_help.append('%s options' % cls.__name__) |
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156 | final_help.append(u'%s options' % cls.__name__) | |
158 | final_help.append(len(final_help[0])*'-') |
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157 | final_help.append(len(final_help[0])*u'-') | |
159 | for k, v in cls_traits.items(): |
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158 | for k, v in cls_traits.items(): | |
160 | help = v.get_metadata('help') |
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159 | help = v.get_metadata('help') | |
161 | final_help.append(k + " : " + v.__class__.__name__) |
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160 | shortname = v.get_metadata('shortname') | |
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161 | header = "%s.%s : %s" % (cls.__name__, k, v.__class__.__name__) | |||
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162 | if shortname is not None: | |||
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163 | header += " (shortname=" + shortname + ")" | |||
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164 | final_help.append(header) | |||
162 | if help is not None: |
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165 | if help is not None: | |
163 | final_help.append(indent(help)) |
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166 | final_help.append(indent(help)) | |
164 | return '\n'.join(final_help) |
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167 | return '\n'.join(final_help) |
@@ -1,10 +1,10 b'' | |||||
1 | import sys |
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1 | import sys | |
2 |
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2 | |||
3 | from IPython.config.configurable import Configurable |
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3 | from IPython.config.configurable import Configurable | |
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4 | from IPython.config.application import Application | |||
4 | from IPython.utils.traitlets import ( |
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5 | from IPython.utils.traitlets import ( | |
5 | Bool, Unicode, Int, Float, List |
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6 | Bool, Unicode, Int, Float, List | |
6 | ) |
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7 | ) | |
7 | from IPython.config.loader import KeyValueConfigLoader |
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8 |
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8 | |||
9 | class Foo(Configurable): |
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9 | class Foo(Configurable): | |
10 |
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10 | |||
@@ -18,35 +18,19 b' class Bar(Configurable):' | |||||
18 | enabled = Bool(True, config=True, shortname="bar-enabled", help="Enable bar.") |
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18 | enabled = Bool(True, config=True, shortname="bar-enabled", help="Enable bar.") | |
19 |
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19 | |||
20 |
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20 | |||
21 |
class MyApp( |
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21 | class MyApp(Application): | |
22 |
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22 | |||
23 | app_name = Unicode(u'myapp', config=True, shortname="myapp", help="The app name.") |
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23 | app_name = Unicode(u'myapp') | |
24 | running = Bool(False, config=True, shortname="running", help="Is the app running?") |
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24 | running = Bool(False, config=True, shortname="running", help="Is the app running?") | |
25 | classes = List([Bar, Foo]) |
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25 | classes = List([Bar, Foo]) | |
26 |
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26 | config_file = Unicode(u'', config=True, shortname="config-file", help="Load this config file") | ||
27 | def __init__(self, **kwargs): |
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28 | Configurable.__init__(self, **kwargs) |
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29 | self.classes.insert(0, self.__class__) |
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30 |
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31 | def print_help(self): |
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32 | for cls in self.classes: |
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33 | cls.class_print_help() |
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34 |
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35 |
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36 | def parse_command_line(self, argv=None): |
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37 | if argv is None: |
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38 | argv = sys.argv[1:] |
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39 | if '-h' in argv or '--h' in argv: |
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40 | self.print_help() |
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41 | sys.exit(1) |
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42 | loader = KeyValueConfigLoader(argv=argv, classes=self.classes) |
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43 | config = loader.load_config() |
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44 | self.config = config |
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45 |
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27 | |||
46 |
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28 | |||
47 | def main(): |
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29 | def main(): | |
48 | app = MyApp() |
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30 | app = MyApp() | |
49 | app.parse_command_line() |
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31 | app.parse_command_line() | |
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32 | if app.config_file: | |||
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33 | app.load_config_file(app.config_file) | |||
50 | print "app.config:" |
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34 | print "app.config:" | |
51 | print app.config |
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35 | print app.config | |
52 |
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36 |
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