function _alias_if_new() {
	_cmd_exists "$1" || alias "$1"="$2"
}

# Setup some handy aliases
_alias_if_new kube-system 'kubectl --namespace=kube-system'
_alias_if_new default 'kubectl --namespace=default'
_alias_if_new telnet 'busybox-extras telnet'
_alias_if_new ll 'ls -l'

# taboff turns off tab auto-completion, which is practically required when pasting code with tabs into the terminal
_alias_if_new taboff 'bind '\''set disable-completion on'\'''
# tabon turn on tab auto-completion
_alias_if_new tabon 'bind '\''set disable-completion off'\'''

# Use kops to create kubecfg (requires kops secrets in environment, e.g. kudo)
_alias_if_new kexp 'kops export kubecfg'

if _cmd_missing chdo; then
	# Run chamber to put secrets for given service(s) in the environment
	function chdo() {
		for service in "$@"; do
			source <(chamber env "$service")
		done
	}
	# Import kops secrets into the environment
	_alias_if_new kudo 'chdo kops'
fi

if _cmd_missing chundo; then
	# Remove secrets chamber put in the environment for given service(s)
	function chundo() {
		source <(chamber export -f dotenv "$@" | cut -f 1 -d= | sed "s/^/unset /")
	}

	# Remove kops secrets from the environment
	_alias_if_new kundo 'chundo kops'
fi

###### END OF ALIASES #########
unset _alias_if_new

##################################################################################################################
#
# Automatically add bash command-line completion for all aliases to commands having completion functions
# Note, we only define the function here. It has to be applied later, after all completions have been installed.
#
# Source: https://superuser.com/a/437508
# Author: https://superuser.com/users/101110/kopischke
# License: cc-wiki, a.k.a. cc by-sa https://creativecommons.org/licenses/by-sa/3.0/
# Originally named "alias_completion"
function _install_alias_completion() {
	local namespace="alias_completion"

	# parse function based completion definitions, where capture group 2 => function and 3 => trigger
	local compl_regex='complete( +[^ ]+)* -F ([^ ]+) ("[^"]+"|[^ ]+)'
	# parse alias definitions, where capture group 1 => trigger, 2 => command, 3 => command arguments
	local alias_regex="alias ([^=]+)='(\"[^\"]+\"|[^ ]+)(( +[^ ]+)*)'"

	# create array of function completion triggers, keeping multi-word triggers together
	eval "local completions=($(complete -p | sed -Ene "/$compl_regex/s//'\3'/p"))"
	((${#completions[@]} == 0)) && return 0

	# create temporary file for wrapper functions and completions
	rm -f "/tmp/${namespace}-*.tmp" # preliminary cleanup
	local tmp_file
	tmp_file="$(mktemp "/tmp/${namespace}-${RANDOM}XXX.tmp")" || return 1

	local completion_loader
	completion_loader="$(complete -p -D 2>/dev/null | sed -Ene 's/.* -F ([^ ]*).*/\1/p')"

	# read in "<alias> '<aliased command>' '<command args>'" lines from defined aliases
	local line
	while read line; do
		eval "local alias_tokens; alias_tokens=($line)" 2>/dev/null || continue # some alias arg patterns cause an eval parse error
		local alias_name="${alias_tokens[0]}" alias_cmd="${alias_tokens[1]}" alias_args="${alias_tokens[2]# }"

		# skip aliases to pipes, boolean control structures and other command lists
		# (leveraging that eval errs out if $alias_args contains unquoted shell metacharacters)
		eval "local alias_arg_words; alias_arg_words=($alias_args)" 2>/dev/null || continue
		# avoid expanding wildcards
		read -a alias_arg_words <<<"$alias_args"

		# skip alias if there is no completion function triggered by the aliased command
		if [[ ! " ${completions[*]} " =~ " $alias_cmd " ]]; then
			if [[ -n "$completion_loader" ]]; then
				# force loading of completions for the aliased command
				eval "$completion_loader $alias_cmd"
				# 124 means completion loader was successful
				[[ $? -eq 124 ]] || continue
				completions+=($alias_cmd)
			else
				continue
			fi
		fi
		local new_completion="$(complete -p "$alias_cmd")"

		# create a wrapper inserting the alias arguments if any
		if [[ -n $alias_args ]]; then
			local compl_func="${new_completion/#* -F /}"
			compl_func="${compl_func%% *}"
			# avoid recursive call loops by ignoring our own functions
			if [[ "${compl_func#_$namespace::}" == $compl_func ]]; then
				local compl_wrapper="_${namespace}::${alias_name}"
				echo "function $compl_wrapper {
							(( COMP_CWORD += ${#alias_arg_words[@]} ))
							COMP_WORDS=($alias_cmd $alias_args \${COMP_WORDS[@]:1})
							(( COMP_POINT -= \${#COMP_LINE} ))
							COMP_LINE=\${COMP_LINE/$alias_name/$alias_cmd $alias_args}
							(( COMP_POINT += \${#COMP_LINE} ))
							$compl_func
						}" >>"$tmp_file"
				new_completion="${new_completion/ -F $compl_func / -F $compl_wrapper }"
			fi
		fi

		# replace completion trigger by alias
		new_completion="${new_completion% *} $alias_name"
		echo "$new_completion" >>"$tmp_file"
	done < <(alias -p | sed -Ene "s/$alias_regex/\1 '\2' '\3'/p")
	source "$tmp_file" && rm -f "$tmp_file"
}
