bootstrap

#!/bin/bash
#
# NAME
#    bootstrap -- initialize/update docker environment
#
# SYNOPSIS
#    bootstrap
#    bootstrap shellinit
#
# DESCRIPTION
#    Execute this script without parameters to build the local docker
#    environment.  Once bootstrapped, dependent services are running
#    via docker-compose and the environment variables are written to
#    *build/test-environment* for future use.
#
#    Running this script with the _shellinit_ command line parameter
#    causes it to simply interrogate the running docker environment,
#    update *build/test-environment*, and print the environment to
#    the standard output stream in a shell executable manner.  This
#    makes the following pattern for setting environment variables
#    in the current shell work.
#
#        prompt% $(./bootstrap shellinit)
#
# vim: set ts=2 sts=2 sw=2 et:
set -e

get_container() {
  echo $(echo "${DOCKER_COMPOSE_PREFIX}" | tr -d -- '-.')_$1_1
}

get_ipaddr() {
  docker inspect --format '{{ .NetworkSettings.IPAddress }}' $1
}

get_exposed_port() {
  docker-compose ${COMPOSE_ARGS} port $1 $2 | cut -d: -f2
}

report_start() {
  printf "Waiting for $1 ... "
}

report_done() {
  printf "${COLOR_GREEN}done${COLOR_RESET}\n"
}

# Ensure Docker is Running
if test -e /var/run/docker.sock
then
  DOCKER_IP=127.0.0.1
else
  echo "Docker environment not detected."
  exit 1
fi

# Activate the virtual environment
if test -e env/bin/activate
then
  . ./env/bin/activate
fi

mkdir -p build

# Common constants
COLOR_RESET='\033[0m'
COLOR_GREEN='\033[0;32m'
PREFIX=${PWD##*/}
DOCKER_COMPOSE_PREFIX=${PREFIX:-${DOCKER_COMPOSE_PREFIX}}
COMPOSE_ARGS="-p ${DOCKER_COMPOSE_PREFIX}"

# Stop any running instances and clean up after them, then pull images
docker-compose ${COMPOSE_ARGS} down --volumes --remove-orphans
docker-compose ${COMPOSE_ARGS} pull
docker-compose ${COMPOSE_ARGS} up -d

cat > build/test-environment<<EOF
export ASYNC_TEST_TIMEOUT=20
export DOCKER_COMPOSE_PREFIX=${DOCKER_COMPOSE_PREFIX}
export CONSUL_HOST=${DOCKER_IP}
export CONSUL_PORT=$(get_exposed_port consul 8500)
EOF

printf "\nBootstrap complete\n\nDon't forget to \". build/test-environment\"\n"