`withUtf8` should also `setFileSystemEncoding` about haskell-with-utf8 HOT 3 CLOSED

withUtf8 does not assume that stdin is encoded in utf-8, because this assumption is not safe to make. It assumes that stdin is encoded as “terminal encoding” (i.e. the one from the locale), unless stdin is redirected to a file, in which case it assumes UTF-8.

It is never safe to just assume that “terminal encoding” is something different than the one from locale, and thus it is not safe to set it to anything but the default.

Can you, please, provide more details of the problem with command line arguments that you are trying to solve?

from haskell-with-utf8.

LC_ALL=C ./my-command "non-ascii-argument".

The problem is how the "non-ascii-argument" is interpreted by my-command. I thought it would make sense to decode it as if it was encoded in utf-8 when using Main.Utf8.withUtf8.

I've heard your arguments and I see that I'm wrong.

from haskell-with-utf8.

Would it make sense to close this issue, it seems to be resolved?

from haskell-with-utf8.