repipe

#!/bin/bash
#
# ci/repipe
#
# Script for merging together pipeline configuration files
# (via Spruce!) and configuring Concourse.
#
# author:  James Hunt <james@niftylogic.com>
#          Dennis Bell <dennis.j.bell@gmail.com>
# created: 2016-03-04

need_command() {
	local cmd=${1:?need_command() - no command name given}

	if [[ ! -x "$(command -v $cmd)" ]]; then
		echo >&2 "${cmd} is not installed."
		if [[ "${cmd}" == "spruce" ]]; then
			echo >&2 "Please download it from https://github.com/geofffranks/spruce/releases"
		fi
		exit 2
	fi
}

cd $(dirname $BASH_SOURCE[0])
echo "Working in $(pwd)"
need_command spruce

# Allow for target-specific settings
settings_file="$(ls -1 settings.yml ${CONCOURSE_TARGET:+"settings-${CONCOURSE_TARGET}.yml"} 2>/dev/null | tail -n1)"
if [[ -z "$settings_file" ]]
then
  echo >&2 "Missing local settings in ci/settings.yml${CONCOURSE_TARGET:+" or ci/settings-${CONCOURSE_TARGET}.yml"}!"
  exit 1
fi

echo >&2 "Using settings found in ${settings_file}"

set -e
trap "rm -f .deploy.yml" QUIT TERM EXIT INT
spruce merge pipeline.yml ${settings_file} > .deploy.yml
PIPELINE=$(spruce json .deploy.yml | jq -r '.meta.pipeline // ""')
if [[ -z ${PIPELINE} ]]; then
	echo >&2 "Missing pipeline name in ci/settings.yml!"
	exit 1
fi

TARGET_FROM_SETTINGS=$(spruce json .deploy.yml | jq -r '.meta.target // ""')
if [[ -z ${CONCOURSE_TARGET} ]]; then
  TARGET=${TARGET_FROM_SETTINGS}
elif [[ "$CONCOURSE_TARGET" != "$TARGET_FROM_SETTINGS" ]]
then
  echo >&2 "Target in {$settings_file} differs from target in \$CONCOURSE_TARGET"
  echo >&2 "  \$CONCOURSE_TARGET: $CONCOURSE_TARGET"
  echo >&2 "  Target in file:    $TARGET_FROM_SETTINGS"
  exit 1
else
  TARGET=${CONCOURSE_TARGET}
fi

if [[ -z ${TARGET} ]]; then
	echo >&2 "Missing Concourse Target in ci/settings.yml!"
	exit 1
fi

fly_cmd="${FLY_CMD:-fly}"

set +x
$fly_cmd --target ${TARGET} set-pipeline     --pipeline ${PIPELINE} --config .deploy.yml
$fly_cmd --target ${TARGET} unpause-pipeline --pipeline ${PIPELINE}