# Docker Start Script Template

start.sh

#!/bin/bash

# Stop docker containers if exists
names=$(docker ps --format "{{.Names}}")

if [ ! -z "$names" ]
then
  printf "\n\e[1;31mKilling the following containers:\e[0m\n\n"

  while read -r name
  do
    eval "docker container stop $name"
  done <<< "$names"
fi

# If --build flag is present run docker-compose build
if [ "$1" == "--build" ]; then
  printf "\n\e[1;34mBuilding Docker\e[0m\n\n"
  docker-compose build
fi

# Run docker-compose in detach mode
printf "\n\e[1;36mDocker Compose Up\e[0m\n\n"
docker-compose up -d

# Running migrations, check if knexfile exists
names=$(docker ps --format "{{.Names}}")
printf "\n\e[1;33mRunning migration from containers\e[0m\n"
while read -r name
do
  eval "docker exec $name /bin/sh -c \"[ -d \"/$name\" ] && cd /$name && test -f knexfile.js && npm run migration --if-present\""
done <<< "$names"

# Logging from containers
# CODE FROM: https://stackoverflow.com/a/38308974
printf "\n\e[1;35mLogging\e[0m\n\n"
esc=$(printf '\e')
while read -r name
do
  # eval to show container name in jobs list
  eval "docker logs -f --tail=5 \"$name\" | sed -e \"s/^/${esc}[3$(( $RANDOM * 6 / 32767 + 1 ))m[-- $name --]${esc}[0m /\" &"
  # For Ubuntu 16.04
  #eval "docker logs -f --tail=5 \"$name\" |& sed -e \"s/^/[-- $name --] /\" &"
done <<< "$names"

function _exit {
  printf "\n\n\e[1;31mStopping tails $(jobs -p | tr '\n' ' ')\e[0m\n"

  # Using `sh -c` so that if some have exited, that error will
  # not prevent further tails from being killed.
  jobs -p | tr '\n' ' ' | xargs -I % sh -c "kill % || true"

  printf "\n\e[1;32mDone\e[0m"
}

# On ctrl+c, kill all tails started by this script.
trap _exit EXIT

# For Ubuntu 16.04
#trap _exit INT

# Don't exit this script until ctrl+c or all tails exit.
wait