37 lines
853 B
Python
37 lines
853 B
Python
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# Module 'dircache'
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#
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# Return a sorted list of the files in a POSIX directory, using a cache
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# to avoid reading the directory more often than necessary.
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# Also contains a subroutine to append slashes to directories.
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import posix
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import path
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cache = {}
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def listdir(path): # List directory contents, using cache
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try:
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cached_mtime, list = cache[path]
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del cache[path]
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except RuntimeError:
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cached_mtime, list = -1, []
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try:
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mtime = posix.stat(path)[8]
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except posix.error:
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return []
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if mtime <> cached_mtime:
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try:
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list = posix.listdir(path)
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except posix.error:
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return []
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list.sort()
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cache[path] = mtime, list
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return list
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opendir = listdir # XXX backward compatibility
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def annotate(head, list): # Add '/' suffixes to directories
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for i in range(len(list)):
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if path.isdir(path.cat(head, list[i])):
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list[i] = list[i] + '/'
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