[3] | 1 | # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) |
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| 2 | # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php |
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| 3 | |
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| 4 | import sys |
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| 5 | import os |
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| 6 | |
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| 7 | def find_package(dir): |
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| 8 | """ |
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| 9 | Given a directory, finds the equivalent package name. If it |
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| 10 | is directly in sys.path, returns ''. |
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| 11 | """ |
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| 12 | dir = os.path.abspath(dir) |
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| 13 | orig_dir = dir |
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| 14 | path = map(os.path.abspath, sys.path) |
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| 15 | packages = [] |
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| 16 | last_dir = None |
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| 17 | while 1: |
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| 18 | if dir in path: |
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| 19 | return '.'.join(packages) |
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| 20 | packages.insert(0, os.path.basename(dir)) |
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| 21 | dir = os.path.dirname(dir) |
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| 22 | if last_dir == dir: |
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| 23 | raise ValueError( |
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| 24 | "%s is not under any path found in sys.path" % orig_dir) |
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| 25 | last_dir = dir |
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| 26 | |
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