setup

#!/bin/bash

src="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
pipeline_types="$(cd $src && find . -name 'pipeline.yml' | sed -e "s|^\./||;s|/pipeline.yml$||")"

usage() {
cat << EOF
${1:-"Setup pipeline template for the desired type of pipeline."}

Usage: $0 <type> [/repo/to/setup]

where <type> is one of:
$(echo "$pipeline_types" | sed -e "s/^/  - /")

EOF
  exit ${2:-0}
}

set -e
case "${1}" in
  (-h|--help|help)
    usage
    ;;
esac

export template=$1
export target=${2:-$(pwd)}

apply_shell_expansion() {
    declare file="$1"
    declare data=$(< "$file")
    declare delimiter="__apply_shell_expansion_delimiter__"
    declare command="cat <<$delimiter"$'\n'"$data"$'\n'"$delimiter"
    eval "$command"
}

initial_settings_yml() {
  local settings_yml=${target}/ci/settings.yml
  if [[ -f ${src}/${template}/helpers/initial_settings.yml ]]; then
    export team=${team:-main}
    export name=$(basename $target)
    export fly_target=${fly_target:-$(fly targets | head -n1 | tail -n1 | awk '{print $1}')}
    export fly_target_url=$(bosh int ~/.flyrc --path /targets/${fly_target}/api)
    apply_shell_expansion ${src}/${template}/helpers/initial_settings.yml > $settings_yml
    ${src}/${template}/helpers/credhub-examples.sh
  else
    echo "--- {}" > $settings_yml
  fi
}

[ -n "${template}" ] || usage "ERROR: Missing pipeline template type" 1
[ -d "${target}" ]   || usage "ERROR: ${target} path not found"       1

pattern="^($(echo "$pipeline_types" | tr "\n" "|" | sed -e "s/\|*$//"))$"
[[ "${template}"=~$pattern ]] || usage "ERROR: ${template} is not a valid pipeline template" 1

echo "Installing ${template} pipeline in ${target}..."
mkdir -p ${target}/ci
cp -R ${src}/${template}/* ${target}/ci/
rm -rf ${target}/ci/helpers
cp ${src}/repipe ${target}/ci/
[ -f ${target}/ci/settings.yml ] || initial_settings_yml ${template} ${target}
exit 0