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annotate mercurial/configitems.py @ 33132:c467d13334ee

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configitems: add an official API for extensions to register config item Extensions can have a 'configtable' mapping and use 'registrar.configitem(table)' to retrieve the registration function. This behave in the same way as the other way for extensions to register new items (commands, colors, etc).
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Sat, 17 Jun 2017 13:48:20 +0200
parents c2ca511c4771
children bf1292c057ef
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1 # configitems.py - centralized declaration of configuration option
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2 #
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3 # Copyright 2017 Pierre-Yves David <pierre-yves.david@octobus.net>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import functools
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11
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12 from . import (
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13 error,
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14 )
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15
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16 def loadconfigtable(ui, extname, configtable):
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17 """update config item known to the ui with the extension ones"""
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18 for section, items in configtable.items():
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19 ui._knownconfig.setdefault(section, {}).update(items)
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20
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21 class configitem(object):
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22 """represent a known config item
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23
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24 :section: the official config section where to find this item,
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25 :name: the official name within the section,
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26 :default: default value for this item,
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27 """
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28
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29 def __init__(self, section, name, default=None):
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30 self.section = section
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31 self.name = name
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32 self.default = default
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33
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34 coreitems = {}
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35
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36 def _register(configtable, *args, **kwargs):
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37 item = configitem(*args, **kwargs)
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38 section = configtable.setdefault(item.section, {})
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39 if item.name in section:
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40 msg = "duplicated config item registration for '%s.%s'"
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41 raise error.ProgrammingError(msg % (item.section, item.name))
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42 section[item.name] = item
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43
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44 # Registering actual config items
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45
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46 def getitemregister(configtable):
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47 return functools.partial(_register, configtable)
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48
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49 coreconfigitem = getitemregister(coreitems)
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50
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51 coreconfigitem('patch', 'fuzz',
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52 default=2,
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53 )
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54 coreconfigitem('ui', 'clonebundleprefers',
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55 default=[],
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56 )
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57 coreconfigitem('ui', 'interactive',
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58 default=None,
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59 )
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60 coreconfigitem('ui', 'quiet',
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61 default=False,
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62 )