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configure.py: Check path accessibility before call to os.path.isfile.
If you have an unmounted dir, ac_dir, in your PATH, the call to os.path.isfile( os.path.join(ac_dir, ac_word + ext) ) hangs. This is probably a python bug, but the result of configure.py hanging and LyX freezing is really bad, hence this workaround. According to the python docs, MacOS doesn't provide os.access(); the hasattr protection is used for this reason.
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@ -198,6 +198,8 @@ def checkProg(description, progs, rc_entry = [], path = [], not_found = ''):
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if "PATHEXT" in os.environ:
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extlist = extlist + os.environ["PATHEXT"].split(os.pathsep)
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for ac_dir in path:
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if hasattr(os, "access") and not os.access(ac_dir, os.F_OK):
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continue
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for ext in extlist:
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if os.path.isfile( os.path.join(ac_dir, ac_word + ext) ):
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logger.info(msg + ' yes')
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@ -252,6 +254,8 @@ def checkProgAlternatives(description, progs, rc_entry = [], alt_rc_entry = [],
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extlist = extlist + os.environ["PATHEXT"].split(os.pathsep)
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found_alt = False
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for ac_dir in path:
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if hasattr(os, "access") and not os.access(ac_dir, os.F_OK):
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continue
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for ext in extlist:
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if os.path.isfile( os.path.join(ac_dir, ac_word + ext) ):
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logger.info(msg + ' yes')
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