fancy_cd.sh

export CD_PATH=''

# Source a .cd file in a directory upon cd. OBVI.
function fancy_cd(){
	# Use the FOR REAL cd
	command cd "$@"
	NEW_CD_PATH=`pwd`

	# Did we source this already?
	if [[ $NEW_CD_PATH != $CD_PATH ]]; then
		export CD_PATH=$NEW_CD_PATH
		MAX_WIDTH=200
		FORMAT_TITLE="\033[0;37m\033[40m%-${MAX_WIDTH}s \033[00m\n"
		FORMAT_ERROR="\n\033[0;31m %-${MAX_WIDTH}s \033[00m\n"

		# Check if .cd exists
		if [ -f ./.cd ]; then

			IFS=$'\n' # Redefine the line separator

			tput rmam # Disable line wrapping
			printf "$FORMAT_TITLE" ".cd file located in `pwd`/"
			tput smam # Re-enable line wrapping

			for i in `cat ./.cd`
			do
				# Ignore cd
				if [[ ${i:0:3} == 'cd ' ]]; then
					IGNORED_COMMANDS="$IGNORED_COMMANDS\n ${i:0:$MAX_WIDTH}"
				# Ignore bash-style comments
				elif [[ ${i:0:1} == '#' ]]; then
					COMMENTED_COMMANDS="$COMMENTED_COMMANDS\n ${i:1:$MAX_WIDTH}"
				# Eval everything else
				else
					RUN_COMMANDS="$RUN_COMMANDS\n ${i:0:$MAX_WIDTH}"

					# Not totally sold on this yet.
					tput sc # save cursor position
					echo -n "Running: $i..."
					eval $i # run the line
					tput el1 # clear line
					tput rc # return to saved position
					echo "Running: $i... Done!" # update
				fi
			done

			unset IFS # Reset to default

			# Print the results

			if ! [ "${RUN_COMMANDS}" ]; then
				# printf "$FORMAT_TITLE" 'This just happened:'
				# echo -e $RUN_COMMANDS
				printf "$FORMAT_ERROR" "Empty .cd file found in `pwd`"
			fi

			# if [ "${IGNORED_COMMANDS}" ]; then
			# 	printf "$FORMAT_TITLE" 'Ignored commands:'
			# 	echo -e $IGNORED_COMMANDS
			# fi

			# if [ "${COMMENTED_COMMANDS}" ]; then
			# 	printf "$FORMAT_TITLE" 'Commented-out commands:'
			# 	echo -e $COMMENTED_COMMANDS
			# fi

			# echo # GIMME SOME SPACE BRO
		fi
	fi

	# Unset everything we don't need
	unset NEW_CD_PATH RUN_COMMANDS IGNORED_COMMANDS COMMENTED_COMMANDS MAX_WIDTH FORMAT_TITLE FORMAT_ERROR
}

alias cd="fancy_cd"

WAT

Run the contents of a .cd file when changing directories. Useful for single-line environment-changing stuff, like activating a project-specific virtual environment upon cd. THAT IS ALL.