Microservices Setup Script

microservices.sh

#!/usr/bin/env sh

set -e

blue="\033[34m"
reset="\033[0m"
red="\033[31m"

function warn {
  echo "$1" > /dev/stderr
}

function alert {
  warn "$red$1$reset"
}

function notice {
  warn "$blue$1$reset"
}

root=`dirname $0`
projects=".projects"
target_dir="$1"
link_dir="${root}/../apps"

if [[ -z "$target_dir" ]]; then
  warn "Usage: $0 <target-directory>"
  exit 1
fi

mkdir -p "$link_dir"

while read line; do
  array=($line)
  name="${array[0]}"
  git_url="${array[1]}"
  target="$target_dir/$name"
  link="$link_dir/$name"

  notice "* Preparing $name"

  if [[ ! -e "$target" ]]; then
    warn "Project $name not present. Cloning ..."
    git clone "$git_url" "$target"
  fi

  if [[ ! -e "$link" ]]; then
    ln -sf "../$target" "$link"
  fi
done < $projects

any_variable_missing=false

notice "* Checking environment configuration"

while read line; do
  array=($line)
  name="${array[0]}"
  link="$link_dir/$name"
  env_file="$link/ENV"


  if [[ -e "$env_file" ]]; then
    while read line; do
      var_name=$(echo "$line" | cut -d' ' -f 1)
      description=$(echo "$line" | cut -d'#' -f 2)
      var_value="${!var_name}"

      if [[ -z "$var_value" ]]; then
        any_variable_missing=true
        alert "$var_name not set -$description"
      else
        warn "$var_name=$var_value"
      fi

    done < "$env_file"
  else
    warn "No ENV file for project ${name}"
  fi

done < $projects

if [[ "$any_variable_missing" == true ]]; then
  alert "Some required environment variables are not set"
  exit 78
fi

while read line; do
  array=($line)
  name="${array[0]}"
  link="$link_dir/$name"

  notice "* Setting up $name"

  if [[ -e "$link/bin/setup" ]]; then
    pushd "$link" > /dev/null
    bin/setup
    popd > /dev/null
  else
    warn "No bin/setup for project ${name}"
  fi
done < $projects