52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
#!/usr/bin/env python3
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# © 2016 James R. Barlow: github.com/jbarlow83
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from functools import partial
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from collections.abc import Iterable
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import sys
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import os
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def re_symlink(input_file, soft_link_name, log=None):
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"""
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Helper function: relinks soft symbolic link if necessary
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"""
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if log is None:
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prdebug = partial(print, file=sys.stderr)
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else:
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prdebug = log.debug
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# Guard against soft linking to oneself
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if input_file == soft_link_name:
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prdebug("Warning: No symbolic link made. You are using " +
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"the original data directory as the working directory.")
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return
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# Soft link already exists: delete for relink?
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if os.path.lexists(soft_link_name):
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# do not delete or overwrite real (non-soft link) file
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if not os.path.islink(soft_link_name):
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raise FileExistsError(
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"%s exists and is not a link" % soft_link_name)
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try:
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os.unlink(soft_link_name)
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except:
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prdebug("Can't unlink %s" % (soft_link_name))
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if not os.path.exists(input_file):
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raise FileNotFoundError(
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"trying to create a broken symlink to %s" % input_file)
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prdebug("os.symlink(%s, %s)" % (input_file, soft_link_name))
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# Create symbolic link using absolute path
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os.symlink(
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os.path.abspath(input_file),
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soft_link_name
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)
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def is_iterable_notstr(thing):
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return isinstance(thing, Iterable) and not isinstance(thing, str)
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