annotate MoinMoin/util/pysupport.py @ 51:54d5932d5a03

merge moin--main--1.3--patch-930: fix error handling in plugins, fix broken chart action Patches applied: * arch@arch.thinkmo.de--2003-archives/moin--main--1.3--patch-930 fix error handling in plugins, fix broken chart action * nirs@freeshell.org--2005/moin--fix--1.3--patch-50 merge from main * nirs@freeshell.org--2005/moin--fix--1.3--patch-51 fix error handling in plugins * nirs@freeshell.org--2005/moin--fix--1.3--patch-52 merge from main * nirs@freeshell.org--2005/moin--fix--1.3--patch-53 update changes with chart action fix imported from: moin--main--1.5--patch-52
author Nir Soffer <nirs@freeshell.org>
date Thu, 29 Sep 2005 00:36:27 +0000
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children ca35d9e6d63e
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1 # -*- coding: iso-8859-1 -*-
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2 """
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3 MoinMoin - Supporting function for Python magic
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4
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5 @copyright: 2002 by Jürgen Hermann <jh@web.de>
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6 @license: GNU GPL, see COPYING for details.
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7 """
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8
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9 #############################################################################
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10 ### Module import / Plugins
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11 #############################################################################
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12
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13 import sys
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14
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15
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16 def isImportable(module):
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17 """ Check whether a certain module is available.
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18 """
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19 try:
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20 __import__(module)
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21 return 1
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22 except ImportError:
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23 return 0
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24
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25
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26 def getPackageModules(packagefile):
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27 """ Return a list of modules for a package, omitting any modules
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28 starting with an underscore.
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29 """
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30 import os, re
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31
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32 packagedir = os.path.dirname(packagefile)
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33
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34 in_plugin_dir = lambda dir, ops=os.path.split: ops(ops(dir)[0])[1] == "plugin"
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35
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36 moinmodule = __import__('MoinMoin')
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37
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38 # Is it in a .zip file?
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39 if not in_plugin_dir(packagedir) and hasattr(moinmodule, '__loader__'):
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40 pyre = re.compile(r"^([^_].*)\.py(?:c|o)$")
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41 zipfiles = moinmodule.__loader__._files
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42 dirlist = [file[0].replace(r'/', '\\').split('\\')[-1]
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43 for file in zipfiles.values() if packagedir in file[0]]
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44 else:
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45 pyre = re.compile(r"^([^_].*)\.py$")
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46 dirlist = os.listdir(packagedir)
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47
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48 pyfiles = filter(None, map(pyre.match, dirlist))
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49 modules = map(lambda x: x.group(1), pyfiles)
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50
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51 modules.sort()
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52 return modules
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53
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55 def importName(modulename, name):
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56 """ Import name dynamically from module
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57
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58 Used to do dynamic import of modules and names that you know their
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59 names only in runtime.
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61 Any error raised here must be handled by the caller.
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62
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63 @param modulename: full qualified mudule name, e.g. x.y.z
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64 @param name: name to import from modulename
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65 @rtype: any object
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66 @return: name from module
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67 """
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68 module = __import__(modulename, globals(), {}, [name])
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69 return getattr(module, name)
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70
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71
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72 def makeThreadSafe(function, lock=None):
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73 """ Call with a function you want to make thread safe
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74
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75 Call without lock to make the function thread safe using one lock per
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76 function. Call with existing lock object if you want to make several
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77 functions use same lock, e.g. all functions that change same data
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78 structure.
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79
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80 @param function: function to make thread safe
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81 @param lock: threading.Lock instance or None
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82 @rtype: function
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83 @retrun: function decorated with locking
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84 """
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85 if lock is None:
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86 import threading
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87 lock = threading.Lock()
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88
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89 def decorated(*args, **kw):
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90 lock.acquire()
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91 try:
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92 return function(*args, **kw)
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93 finally:
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94 lock.release()
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95
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96 return decorated