Terraform Bash script

tf.sh

#!/bin/bash

set -euo pipefail

export DEBUG="${DEBUG:-0}"
export RC_FILES="${RC_FILES:-}"
export TF_HTTP_BACKEND_GITLAB="${TF_HTTP_BACKEND_GITLAB:-1}"

if [[ "${DEBUG}" -eq 1 ]]; then
  set -x
else
  set +x
fi

if [[ -z "${RC_FILES}" ]]; then
  export RC_FILES="$(find . -name "*.bashrc")"
fi

echo "${RC_FILES}"

for RC_FILE in ${RC_FILES}; do
  if [[ -f "${RC_FILE}" ]]; then
    source "${RC_FILE}"
  else
    echo "Missing ${RC_FILE}."
    exit 1
  fi
done

terraform_init() {
  if [[ "${TF_HTTP_BACKEND_GITLAB}" -eq 1 ]]; then
    terraform init --upgrade \
      -backend-config=address=${TF_ADDRESS} \
      -backend-config=lock_address=${TF_ADDRESS}/lock \
      -backend-config=unlock_address=${TF_ADDRESS}/lock \
      -backend-config=username=${TF_USERNAME} \
      -backend-config=password=${TF_PASSWORD} \
      -backend-config=lock_method=POST \
      -backend-config=unlock_method=DELETE \
      -backend-config=retry_wait_min=5
  else
    terraform init --upgrade
  fi
}


terraform_plan() {

  terraform_init
  terraform plan -out "$@" terraform-plan.out \
    > >(tee terraform-plan-stdout.txt) \
    2> >(tee terraform-plan-stderr.txt >&2)
  terraform show -json terraform-plan.out \
    >terraform-plan.json \
    2> >(tee terraform-show-plan-stderr.txt >&2)

  clean_output "terraform-plan-stdout.txt" "terraform-plan-stderr.txt"

}

terraform_plan_destroy() {
  terraform_init
  terraform plan -destroy -out "$@" terraform-plan.out \
    > >(tee terraform-plan-stdout.txt) \
    2> >(tee terraform-plan-stderr.txt >&2)
  terraform show -json terraform-plan.out \
    > >(tee terraform-plan.json) \
    2> >(tee terraform-show-plan-stderr.txt >&2)

  clean_output "terraform-plan-stdout.txt" "terraform-plan-stderr.txt"

}

terraform_apply() {

  if [[ ! -f terraform-plan.out ]]; then
    echo "Missing terraform-plan.out."
    exit 1
  fi

  terraform_init

  terraform apply terraform-plan.out \
    > >(tee terraform-apply-stdout.txt) \
    2> >(tee terraform-apply-stderr.txt >&2)

  clean_output "terraform-apply-stdout.txt" "terraform-apply-stderr.txt"
}

clean_output() {

  for FILE in "$@"; do
    sed -i '' -r 's/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[mGK]//g' "${FILE}"
  done
}

clean() {
  rm "terraform-plan.out" \
    "terraform-plan.json" \
    "terraform-apply-stdout.txt" \
    "terraform-apply-stderr.txt" \
    "terraform-plan-stdout.txt" \
    "terraform-plan-stderr.txt"
}

print_help() {
  echo "Available commands:"
  echo "plan"
  echo "plan_destroy"
  echo "apply"
  echo "clean"
}

if [[ $# -eq 0 ]]; then
  print_help
  exit 1
fi

case "$1" in
plan)
  shift
  terraform_plan "$@"
  ;;
plan_destroy)
  shift
  terraform_plan_destroy "$@"
  ;;
apply)
  shift
  terraform_apply "$@"
  ;;
clean)
  shift
  clean "$@"
  ;;
*)
  print_help
  ;;
esac