zsh: Heavy improvements to ls_show_hidden

Autoload the function instead of declaring it directly.
Add functionality for multiple targets. It should now pretty much
perform like `command ls`.
Refactored code to use more zsh extensions like globbing instead of
parsing the output of `ls` making it a lot faster.

.config/zsh/plugins/alias.zsh

@@ -72,7 +72,7 @@ alias gdiff='git diff'
 alias gd='git diff'
 
 ## Navigation
-alias ls='_ls_show_hidden --color=auto --group-directories-first -p -v'
+alias ls='ls --color=auto --group-directories-first -p -v'
 alias sl='ls'
 alias la='ls -A'
 alias l='ls -lh --time-style=long-iso'

.config/zsh/plugins/functionsPre.zsh

@@ -18,28 +18,3 @@ function _nemo_wd_default() {
 		command nemo "$@"
 	fi
 }
-
-## ls function that prints hidden files when there are no regular files
-## or if we are in a directory that matches the regex in LS_SHOW_ALL_DIRS
-function _ls_show_hidden() {
-	# Can be overwritten by settings it before calling
-	local LS_SHOW_ALL_DIRS=${LS_SHOW_ALL_DIRS:-"dotfiles|\.config"}
-
-	# if a path is given, target will contain the given directory or the directory in which the
-	# given file is located
-	local target
-	for arg in "$@"; do
-		if [ -d "$arg" ]; then
-			target="$arg"
-			break
-		elif [ -d "${arg%/*}" ]; then
-			target="${arg%/*}"
-			break
-		fi
-	done
-	if [[ -z "$(command ls "$@")" || "$( (cd "$target"; pwd) )" =~ "${LS_SHOW_ALL_DIRS:-^$}" ]]; then
-		command ls -A "$@"
-	else
-		command ls "$@"
-	fi
-}