tree 155d64af7a1c8b24c6e6b30f2521c59ae82ceb39
parent 68773ac915580e88016c34ce1269730382b501d4
author Felipe Contreras <felipe.contreras@gmail.com> 1397259145 -0500
committer Junio C Hamano <gitster@pobox.com> 1397507243 -0700

prompt: fix missing file errors in zsh

zsh seems to have a bug while redirecting the stderr of the 'read'
command:

    % read foo 2>/dev/null <foo
    zsh: no such file or directory: foo

Which causes errors to be displayed when certain files are missing.
Let's add a convenience function to manually check if the file is
readable before calling "read".

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>