blueprint.v1.sh

#!/bin/bash

cpis=0
forges=0

read -r -d '' CPI_USAGE <<EOF
  BOSH Director Cloud Provider Interfaces
  (you need *exactly one* of these)

     vsphere  - VMWare's vSphere ESXi+vCenter
EOF
read -r -d '' FORGE_USAGE <<EOF
  Blacksmith Forges
  (you need *at least one* of these)

     redis      - Redis Key-Value storage, available
                  as dedicated, single-instance VMs.

     rabbitmq   - RabbitMQ messaging queue, available
                  as standalone VMs and clustered.

     postgresql - PostgreSQL database server, available
                  as standalone VMs and clustered with
                  replication.
EOF

declare -a yamls
yamls+=( base/*.yml )

declare -a features
features+=( vsphere redis rabbitmq postgresql )

invalid_features() {
  declare -a bad_ones
  for have in "${GENESIS_ENV_FEATURES[@]}"; do
    local ok=0
    for valid in "$@"; do
      if [[ "${have}" = "${valid}" ]]; then
        ok=1
        break;
      fi
    done
    if [[ $ok = 0 ]]; then
      bad_ones+=( $have )
    fi
  done
  echo "${bad_ones[@]}"
  return 0
}

valid_features() {
  for have in "${GENESIS_ENV_FEATURES[@]}"; do
    local ok=0
    for valid in "$@"; do
      if [[ "${have}" = "${valid}" ]]; then
        ok=1
        break;
      fi
    done
    if [[ $ok = 0 ]]; then
      return 1
    fi
  done
  return 0
}

validate_features() {
  if ! valid_features "$@"; then
    echo >&2 "$GENESIS_KIT_NAME/$GENESIS_KIT_VERSION does not understand the following feature flags:"
    for bad in $(invalid_features "$@"); do
      echo >&2 " - $bad"
    done
    exit 1
  fi
}

want_feature() {
  want=$1
  for have in "${GENESIS_ENV_FEATURES[@]}"; do
    if [[ "${have}" = "${want}" ]]; then
      return 0
    fi
  done
  return 1
}

#######################################

GENESIS_ENV_FEATURES=($@)

validate_features ${features[@]};

if ! valid_features ${features[@]}; then
  echo >&2 "Unrecognized feature flags:"
  for x in $(invalid_features ${features[@]}); do
    echo >&2 " - $x"
  done
  echo >&2
  cat >&2 <<EOF
Unrecognized features:
This Genesis kit knows about the following subkits:

$CPI_USAGE


$FORGE_USAGE

EOF
  exit 1
fi

#######################################

if want_feature vsphere; then
  yamls+=( subkits/vsphere/*.yml )
else
  cat >&2 <<EOF
You have not specified a BOSH Director Cloud Provider Interface
subkit.  Blacksmith needs to know how to talk to the IaaS layer
you wish to use to deploy on-demand services.

$CPI_USAGE

EOF
  exit 1
fi

forges=0
for forge in redis rabbitmq postgresql; do
  if want_feature $forge; then
    forges=1
    yamls+=( subkits/$forge/*.yml )
  fi
done
if [[ $forges -ne 1 ]]; then
  cat >&2 <<EOF
You have not specified any Blacksmith Forges to use.
Each Forge provides the necessary bits to deploy an entire class
of on-demand service, i.e. PostgreSQL database servers.

$FORGE_USAGE

EOF
  exit 1
fi


echo "${yamls[@]}"