abra-bash/abra

#!/bin/bash
PROGRAM_NAME=""$(basename "$0")

if [ -z "$STACK_NAME" ] || [ -z "$STACK_NAME" ]; then
	echo "ERROR: STACK_NAME must be set (e.g. export STACK_NAME=my_cool_app)"
	exit
fi

sub_help(){
	echo "Usage: $PROGRAM_NAME <subcommand> [options]"
	echo ""
	echo "Subcommands:"
	echo "    service_run SERVICE [CMD]             run a command in the specified service's container"
	echo "    secret_generate SECRET VERSION [CMD]  generate a secret, store it in pass & as a Docker secret"
	echo "    deploy [COMPOSE_FILE]                 let 'em rip"
	echo "    logs SERVICE                          tail logs from a deployed service"
	echo ""
		echo "Make sure \$STACK_NAME is set (probably using direnv)"
}

sub_secret_generate(){
	SECRET=$1
	VERSION=$2
	PW=${3:-pwqgen}

	if [ -z "$SECRET" ] || [ -z "$VERSION" ]; then
		echo "Usage: $PROGRAM_NAME secret_generate SECRET VERSION"
		exit
	fi

	$PW | tee \
		>(docker secret create "${STACK_NAME}_${SECRET}_${VERSION}" -) \
		>(pass insert "hosts/autonomic-swarm/${STACK_NAME}/${SECRET}" -m)
}

sub_service_run(){
	SERVICE=$1
	SH=${2:-/bin/sh}

	CONTAINER=$(docker container ls --format "table {{.ID}},{{.Names}}" \
		| grep "${STACK_NAME}_${SERVICE}" | cut -d',' -f1)

	if [ -z "$CONTAINER" ]; then
		echo "Container not found! 🚨"
		exit
	fi

	docker exec -it "$CONTAINER" "$SH"
}

sub_deploy (){
	COMPOSE=${1:-compose.yml}

	echo "About to deploy:"
	echo "Compose: $(tput setaf 3)${PWD}/${COMPOSE}$(tput sgr0)"
	echo "Domain: $(tput setaf 2)${DOMAIN}$(tput sgr0)"
	echo "Stack: $(tput setaf 1)${STACK_NAME}$(tput sgr0)"

	read -rp "Continue? (y/[n])? " choice

	case "$choice" in
		y|Y ) ;;
		n|N ) return;;
		* ) return;;
	esac

	docker stack deploy -c "$COMPOSE" "$STACK_NAME"
}

sub_logs (){
	SERVICE=$1

	docker service logs "${STACK_NAME}_${SERVICE}" \
		--follow \
		--no-trunc \
		--details \
		--timestamps
}

subcommand=$1
case $subcommand in
	"" | "-h" | "--help")
		sub_help
		;;
	*)
		shift
		"sub_${subcommand}" "$@"
		if [ $? = 127 ]; then
			echo "Error: '$subcommand' is not a known subcommand." >&2
			echo "       Run '$PROGRAM_NAME --help' for a list of known subcommands." >&2
			exit 1
		fi
		;;
esac