complex-bash

complex-bash

#! /bin/bash

declare -r bucketName="aws-pipeline-bucket"
declare -r region="eu-west-1"
declare -r stackName="aws-pipeline"
declare -r pipelinesFolderPath="./aws-pipelines"
declare -r pathToTemplate="<the-path-of-the-pipeline-template>"

handleResponse() {
  if [ $1 -eq 0 ]
  then
    echo "Done"
  else
    echo "Failed!"
    echo "Error: $2"
    echo "Exiting..."
    exit 1
  fi
}

bucketExists() {
  aws s3api head-bucket --bucket $1 2> /dev/null
  local -i response=$?

  if [ $response -eq 0 ]
  then
    true
  else
    false
  fi
}

validateTemplate() {
  echo "Validating template..."
  output=$(aws cloudformation validate-template --template-body $pathToTemplate 2>&1)
  exitCode=$?

  handleResponse $exitCode "$output"
}

createBucket() {
  echo "Creating bucket [$1]..."
  output=$(aws s3api create-bucket --bucket $1 --region $region --create-bucket-configuration LocationConstraint=$region --acl private 2>&1)
  local -i exitCode=$?
  handleResponse $exitCode "$output"
}

packageTeplates() {
  echo "Packaging templates..."
  output=$(aws cloudformation package --template-file $pipelinesFolderPath/aws-pipeline-root.yml --output-template $pipelinesFolderPath/aws-pipeline.yml --s3-bucket $bucketName 2>&1)
  local -i exitCode=$?
  handleResponse $exitCode "$output"
}

deployPipelines() {
  echo "Deploying pipelines..."
  output=$(aws cloudformation deploy --template-file $pipelinesFolderPath/aws-pipeline.yml --stack-name $stackName --capabilities CAPABILITY_NAMED_IAM --region $region 2>&1)
  local -i exitCode=$?
  handleResponse $exitCode "$output"
}

deploy() {
  echo "Starting pipeline deployment..."
  validateTemplate
  packageTeplates
  deployPipelines
  echo "Success!"
}

main() {
  if bucketExists $bucketName
  then
    echo "Bucket [$bucketName] found"
    deploy
  else
    echo "Bucket [$bucketName] not found"
    createBucket $bucketName
    deploy
  fi
}

main "$@"