bug#23227: Inconsistent behavior for --file=~/some-file

[Santiago Ruano Rincón]

Hi,

grep fails to parse the tilde (~) to represent $HOME, when it is used to
give a file's path to --file=, but it works with --file

% echo "a" > ~/tmp-pattern
% echo "hola" | LANG=C grep --file=/home/santiago/tmp-pattern
hola
% echo "hola" | LANG=C grep --file /home/santiago/tmp-pattern
hola
% echo "hola" | LANG=C grep --file ~/tmp-pattern
hola
% echo "hola" | LANG=C grep --file=${HOME}/tmp-pattern 
hola
% echo "hola" | LANG=C grep --file=~/tmp-pattern
grep: ~/tmp-pattern: No such file or directory

This was filed in debian:
https://bugs.debian.org/504804

Cheers,

Santiago