Prefer unaliased `grep` to avoid unexpected/wrong completions.

[tfpf]

If

alias grep='grep -n'

is set before zypper's programmable completion script is sourced, the latter malfunctions. For instance, typing zypper remove and then pressing TABTAByq results in the following.

$ zypper remove 
Display all 2075 possibilities? (y or n)
1000\:libpaper                                    1935\:xfwm4-lang
1001\:libpaper-tools                              1936\:xhost
1002\:libpaper2                                   1937\:xiccd
1003\:libparted-fs-resize0                        1938\:xinit
1004\:libparted2                                  1939\:xkbcomp
1005\:libpathplan4                                193\:farstream-data
1006\:libpci3                                     1940\:xkeyboard-config
1007\:libpciaccess0                               1941\:xkeyboard-config-lang
1008\:libpcre1                                    1942\:xli
1009\:libpcre2-16-0                               1943\:xmessage
100\:bzip2                                        1944\:xml-commons-apis
1010\:libpcre2-32-0                               1945\:xmodmap
1011\:libpcre2-8-0                                1946\:xorg-x11-Xvnc
1012\:libpcre2-posix3                             1947\:xorg-x11-Xvnc-module
1013\:libpcsclite1                                1948\:xorg-x11-driver-video
1014\:libpeas-1_0-0                               1949\:xorg-x11-essentials
1015\:libpeas-gtk-1_0-0                           194\:fdupes
1016\:libpeas-lang                                1950\:xorg-x11-fonts
1017\:libpeas-loader-python3                      1951\:xorg-x11-fonts-converted
1018\:libpgm-5_3-0                                1952\:xorg-x11-fonts-core
1019\:libpipeline1                                1953\:xorg-x11-fonts-legacy
101\:ca-certificates                              1954\:xorg-x11-libX11-ccache
1020\:libpipewire-0_3-0                           1955\:xorg-x11-server
1021\:libpixman-1-0                               1956\:xorg-x11-server-Xvfb
1022\:libpkgconf3                                 1957\:xorg-x11-server-extra
$ zypper remove 

A simple fix is to use \grep instead of grep. Though this does raise the question: should cut and sed get the same treatment?

Notes

• Homebrew does the same thing.
• bash-completion uses command to achieve the same effect.

[mlandres]

Thanks for raising this. You are right, it may in fact affect any command used inside. Maybe even an \unalias -a at the beginning is appropriate. We'll review the script.

[tfpf]

The \unalias -a suggestion got me thinking: it won't touch any functions, so it may not fully address the problem? Upon some experimentation, I found that if a function grep is defined, \grep actually calls that function instead of running /bin/grep. However, command grep runs /bin/grep.