How to make cd arguments case INsensitive?
Enabling cdspell
will help:
shopt -s cdspell
From the man
page:
cdspell If set, minor errors in the spelling of a directory component in a cd command will be corrected. The errors checked for are transposed characters, a miss- ing character, and one character too many. If a correction is found, the corrected file name is printed, and the command proceeds. This option is only used by interactive shells.
Bash
set completion-ignore-case on
in ~/.inputrc
(or bind 'set completion-ignore-case on'
in ~/.bashrc
) would be my recommendation. If you're going to type the full name, why balk at a few presses of the Shift key?
But if you really want it, here's a wrapper around cd
that tries for an exact match, and if there is none, looks for a case-insensitive match and performs it if it is unique. It uses the nocaseglob
shell option for case-insensitive globbing, and turns the argument into a glob by appending @()
(which matches nothing, and requires extglob
). The extglob
option has to be turned on when defining the function, otherwise bash can't even parse it. This function doesn't support CDPATH
.
shopt -s extglob
cd () {
builtin cd "$@" 2>/dev/null && return
local options_to_unset=; local -a matches
[[ :$BASHOPTS: = *:extglob:* ]] || options_to_unset="$options_to_unset extglob"
[[ :$BASHOPTS: = *:nocaseglob:* ]] || options_to_unset="$options_to_unset nocaseglob"
[[ :$BASHOPTS: = *:nullglob:* ]] || options_to_unset="$options_to_unset nullglob"
shopt -s extglob nocaseglob nullglob
matches=("${!#}"@()/)
shopt -u $options_to_unset
case ${#matches[@]} in
0) # There is no match, even case-insensitively. Let cd display the error message.
builtin cd "$@";;
1)
matches=("$@" "${matches[0]}")
unset "matches[$(($#-1))]"
builtin cd "${matches[@]}";;
*)
echo "Ambiguous case-insensitive directory match:" >&2
printf "%s\n" "${matches[@]}" >&2
return 3;;
esac
}
Ksh
While I'm at it, here's a similar function for ksh93. The ~(i)
modified for case-insensitive matching seems to be incompatible with the /
suffix to match directories only (this may be a bug in my release of ksh). So I use a different strategy, to weed out non-directories.
cd () {
command cd "$@" 2>/dev/null && return
typeset -a args; typeset previous target; typeset -i count=0
args=("$@")
for target in ~(Ni)"${args[$(($#-1))]}"; do
[[ -d $target ]] || continue
if ((count==1)); then printf "Ambiguous case-insensitive directory match:\n%s\n" "$previous" >&2; fi
if ((count)); then echo "$target"; fi
((++count))
previous=$target
done
((count <= 1)) || return 3
args[$(($#-1))]=$target
command cd "${args[@]}"
}
Zsh
Finally, here's a zsh version. Again, allowing case-insensitive completion is probably the best option. The following setting falls back to case-insensitive globbing if there is no exact-case match:
zstyle ':completion:*' '' matcher-list 'm:{a-z}={A-Z}'
Remove ''
to show all case-insensitive matches even if there is an exact-case match. You can set this from the menu interface of compinstall
.
cd () {
builtin cd "$@" 2>/dev/null && return
emulate -L zsh
setopt local_options extended_glob
local matches
matches=( (#i)${(P)#}(N/) )
case $#matches in
0) # There is no match, even case-insensitively. Try cdpath.
if ((#cdpath)) &&
[[ ${(P)#} != (|.|..)/* ]] &&
matches=( $^cdpath/(#i)${(P)#}(N/) ) &&
((#matches==1))
then
builtin cd $@[1,-2] $matches[1]
return
fi
# Still nothing. Let cd display the error message.
builtin cd "$@";;
1)
builtin cd $@[1,-2] $matches[1];;
*)
print -lr -- "Ambiguous case-insensitive directory match:" $matches >&2
return 3;;
esac
}