Also, one more comment on your technique:
If you use get_filename_component in conjunction with paths that
contain ".." or Windows-style component separators ("\"), you can
always clean up the resulting string with the "ABSOLUTE" argument to
get_filename_component. It will collapse any "/../" or "/./" bits of
the path, and convert all the "\" to ?
"/" in the resulting variable.
It's just easier to read the values (as a person) if you don't have to
think about any ".." resolution mentally when looking at cache entries
and variable values. So.... as input to find_*, I would recommend using
only ABSOLUTE paths as the hints and paths for such calls.
HTH,
David C.
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