mirror of
https://github.com/Hopiu/linkchecker.git
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3b1b95af5a
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@2970 e7d03fd6-7b0d-0410-9947-9c21f3af8025
97 lines
3.1 KiB
Python
97 lines
3.1 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2005 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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"""
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File and path utilities.
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"""
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import os
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import fnmatch
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def write_file (filename, content, backup=False, callback=None):
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"""
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Overwrite a possibly existing file with new content. Do this
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in a manner that does not leave truncated or broken files behind.
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@param filename: name of file to write
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@type filename: string
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@param content: file content to write
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@type content: string
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@param backup: if backup file should be left
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@type backup: bool
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@param callback: non-default storage function
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@type callback: None or function taking two parameters (fileobj, content)
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"""
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# first write in a temp file
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f = file(filename+".tmp", 'wb')
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if callback is None:
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f.write(content)
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else:
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callback(f, content)
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f.close()
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# move orig file to backup
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if os.path.exists(filename):
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os.rename(filename, filename+".bak")
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# move temp file to orig
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os.rename(filename+".tmp", filename)
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# remove backup
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if not backup and os.path.exists(filename+".bak"):
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os.remove(filename+".bak")
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def has_module (name):
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"""
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Test if given module can be imported.
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@return: flag if import is successful
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@rtype: bool
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"""
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try:
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exec "import %s" % name
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return True
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except ImportError:
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return False
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class GlobDirectoryWalker (object):
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# a forward iterator that traverses a directory tree
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def __init__ (self, directory, pattern="*"):
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self.stack = [directory]
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self.pattern = pattern
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self.files = []
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self.index = 0
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def __getitem__ (self, index):
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while True:
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try:
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filename = self.files[self.index]
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self.index += 1
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except IndexError:
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# pop next directory from stack
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self.directory = self.stack.pop()
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self.files = os.listdir(self.directory)
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self.index = 0
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else:
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# got a filename
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fullname = os.path.join(self.directory, filename)
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if os.path.isdir(fullname) and not os.path.islink(fullname):
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self.stack.append(fullname)
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if fnmatch.fnmatch(filename, self.pattern):
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return fullname
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def rglob (directory, pattern):
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return GlobDirectoryWalker(directory, pattern=pattern)
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