[Python-Dev] Easy way to detect filesystem case-sensitivity?

[MRAB]

Brett Cannon wrote:
> 
> 
> On Thu, May 7, 2009 at 18:56, John Arbash Meinel 
> <john.arbash.meinel at gmail.com <mailto:john.arbash.meinel at gmail.com>> wrote:
> 
>     Andrew Bennetts wrote:
>      > Antoine Pitrou wrote:
>      >> Robert Kern <robert.kern <at> gmail.com <http://gmail.com>> writes:
>      >>> Since one may have more than one filesystem side-by-side, this
>     can't be just
>      >> be
>      >>> a system-wide boolean somewhere. One would have to query the
>     target directory
>      >>> for this information. I am not aware of the existence of code
>     that does such
>      >> a
>      >>> query, though.
>      >> Or you can just be practical and test for it. Create a file
>     "foobar" and see if
>      >> you can open "FOOBAR" in read mode...
>      >
>      > Agreed.  That is how Bazaar's test suite detects this, and it
>     works well.
>      >
>      > -Andrew.
> 
> 
>     Actually, I believe we do:
> 
>     open('format', 'wb').close()
>     try:
>      os.lstat('FoRmAt')
>     except IOError, e:
>      if e.errno == errno.ENOENT:
>       ...
> 
>     I don't know that it really matters, just wanted to indicate we use
>     'lstat' rather than 'open()' to check. I could be wrong about the test
>     suite, but I know that is what we do for 'live' files. (We always create
>     a format file, so we know it is there to 'stat' it via a different
>     name.)
> 
> 
> Thanks for the help to everyone. I ended up simply taking __file__, 
> making it all uppercase (or lowercase if it is already uppercase) and 
> then doing os.path.exists() on the modified name. Seems to work.
> 
Alternatively, use swapcase() and then os.path.exists().