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20 lines
435 B
20 lines
435 B
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import re
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_find_unsafe = re.compile(r'[^\w@%+=:,./-]').search
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def quote(s):
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"""Return a shell-escaped version of the string *s*."""
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if not s:
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return "''"
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if _find_unsafe(s) is None:
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return s
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# use single quotes, and put single quotes into double quotes
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# the string $'b is then quoted as '$'"'"'b'
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return "'" + s.replace("'", "'\"'\"'") + "'"
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