SSH config management file to enable and disable ssh configs on the fly

ssh-mod-conf.sh

#!/bin/bash

##################################
#
# SSH Mod Config Script
#     v1.2
#
#  @github.com/samson4649
#
#
##################################
#
#  Setup
#
#  move script to bin location
#    $ mv ssh-mod-conf.sh /usr/local/bin/ssh-mod-conf
#
#  add multi name link calls
#    $ ln -s /usr/local/bin/ssh-mod-conf /usr/local/bin/sshlsconf
#    $ ln -s /usr/local/bin/ssh-mod-conf /usr/local/bin/sshenconf
#    $ ln -s /usr/local/bin/ssh-mod-conf /usr/local/bin/sshdisconf
#
#  building support directories 
#    $ mkdir ${HOME}/.ssh/config.d/{available,enabled}.d
#
#  move current configuiration to new directory
#    $ mv ~/.ssh/config ~/.ssh/config.d/available.d/default.conf
#
#  enable the default configuration
#    $ sshenconf default 
#
#  set to include the enabled.d directory 
#    $ echo "Include ~/.ssh/config.d/available.d/*.conf" > ~/.ssh/config
#
#
#  #### OPTIONAL #####
#
#  (optional) add additional configurations to available.d directory with the ".conf" suffix (wont work without it)
#    $ mv site-a.conf ~/.ssh/config.d/available.d/site-a.conf
#
#  check that the configuration is enabled 
#    $ sshlsconf
#    [ENABLED]  /home/samson4649/.ssh/available.d/default.conf
#    [DISABLED] /home/samson4649/.ssh/available.d/site-a.conf
#
###################################



EXEC="${0##*/}"
conf="${1}"

function _exit() {
	ECODE=$1
	shift
	echo "$@"
	#echo "exiting with error code ${ECODE}"
	exit ${ECODE}
}	

function _check_available(){
	if [ -e "${HOME}/.ssh/config.d/available.d/${conf}.conf" ]; then 
		echo "true"
	else
		echo "false"
	fi
}

function _check_enabled(){
	if [ -e "${HOME}/.ssh/config.d/enabled.d/${conf}.conf" ]; then 
		echo "true"
	else
		echo "false"
	fi
}

function _check_empty(){
	if [ -z "${conf}" ]; then
		_exit 99 "Cant use an empty configuration file..."
	fi
}


case "${EXEC}" in 

	sshlsconf)
		find "${HOME}"/.ssh/config.d/available.d -name "*.conf" | grep .conf &>/dev/null \
			|| _exit 2 "No available configuration in available.d"
		while IFS= read -r c; do 
			if [ -e "${HOME}/.ssh/config.d/enabled.d/${c##*/}" ]; then
				echo -ne "[\e[32mENABLED\e[39m]  "
			else
				echo -n "[DISABLED] "
			fi
			echo "${c}" 
		done < <(ls -w 1 "${HOME}"/.ssh/config.d/available.d/*.conf )
		;;

	sshenconf)
		_check_empty
		if [[ "$(_check_available)" == "true" ]]; then 
			if [[ "$(_check_enabled)" == "true" ]] ; then
				_exit 1 "Already enabled config '${conf}'"
			else
				ln -s "${HOME}/.ssh/config.d/available.d/${conf}.conf" \
					"${HOME}/.ssh/config.d/enabled.d/${conf}.conf" && \
					echo "Config '${conf}' enabled"
			fi
		else 
			echo "Not able to find config '${conf}' in ${HOME}/.ssh/config.d/available.d/"
		fi
		;;

	sshdisconf)
		_check_empty
		if [[ "$(_check_enabled)" == "false" ]] ; then
			_exit 1 "Config not enabled - '${conf}'"
		else
			rm -f "${HOME}/.ssh/config.d/enabled.d/${conf}.conf" && \
				echo "Config '${conf}' disabled"
		fi
		;;

	sshshowconf)
		for conf in ~/.ssh/config.d/enabled.d/*.conf; do
			echo -e "\n  ###  ${conf##*/} ### "
			grep -Ei '^host .*$' "${conf}" | sed -E 's/^[hH]ost (.*)$/\1/g'
		done
		;;

	*)
		echo "bad multi-script call name '${EXEC}'"
		;;

esac

exit 0