deploy

#!/bin/bash

# Deploys a unikorn component.  Will only work if the chart version
# has been bumped, otherwise you will need to manually restart all
# the pods with kubectl.
#
# NOTE: must be run from the component's root directory.


# Get the environemnt.
ENVIRONMENT="local"

# A prefix to add to namespaces to avoid clashes
NAMESPACE_PREFIX="unikorn"

# A production deployment will use public helm charts.
PRODUCTION=""

# Template renders the chart to stdout, very useful if you are piping
# the output into kubectl diff...
TEMPLATE=""

while getopts "e:n:pt" opt; do
	case "${opt}" in
		e)
			ENVIRONMENT=${OPTARG}
			;;
		n)
			NAMESPACE_PREFIX=${OPTARG}
			;;
		p)
			PRODUCTION="true"
			;;
		t)
			TEMPLATE="true"
			;;
		*)
			echo "Unexpected flag -${opt}"
			exit 1
	esac
done

# Figure out some repo constants.
GIT_REPO=""
if [[ -f go.mod ]]; then
	GIT_REPO="$(head -n1 go.mod | awk '{print $2}')"
elif [[ -f package.json ]]; then
	GIT_REPO="$(jq -r .repository.url package.json | sed -e 's,https://,,')"
fi
GIT_ORG_NAME=$(echo -n "${GIT_REPO}" | cut -d '/' -f 2)
GIT_REPO_NAME=$(echo -n "${GIT_REPO}" | cut -d '/' -f 3)
HELM_REPO="https://${GIT_ORG_NAME}.github.io/${GIT_REPO_NAME}"
HELM_CHART_DIR="charts/${GIT_REPO_NAME}"
HELM_CHART=$(yq .name "${HELM_CHART_DIR}/Chart.yaml")
HELM_CRD_DIR="${HELM_CHART_DIR}/crds"

# Define some constants for Helm
NAMESPACE="${NAMESPACE_PREFIX}-${GIT_REPO_NAME}"

ARGS=()

# Add an values files you need.
GLOBAL_VALUES_FILE="${HOME}/.config/unikorn/${ENVIRONMENT}/global.yaml"

if [[ -f ${GLOBAL_VALUES_FILE} ]]; then
	ARGS+=("-f" "${GLOBAL_VALUES_FILE}")
fi

VALUES_FILE="${HOME}/.config/unikorn/${ENVIRONMENT}/${GIT_REPO_NAME}.yaml"

if [[ -f ${VALUES_FILE} ]]; then
	ARGS+=("-f" "${VALUES_FILE}")
fi

COMMAND=(upgrade --install --create-namespace)

# If we are doing a non-template run, update the CRDs as helm doesn't do this.
if [[ -z ${TEMPLATE} ]]; then
	if [[ -d ${HELM_CRD_DIR} ]]; then
		kubectl apply -f "${HELM_CRD_DIR}"
	fi
else
	COMMAND=(template --no-hooks --skip-tests)
fi

if [[ -z ${PRODUCTION} ]]; then
	# Deploy the actual chart.
	helm "${COMMAND[@]}" -n "${NAMESPACE}" "${GIT_REPO_NAME}" "${HELM_CHART_DIR}" "${ARGS[@]}"
else
	helm "${COMMAND[@]}" -n "${NAMESPACE}" "${GIT_REPO_NAME}" "${HELM_CHART}" --repo "${HELM_REPO}" "${ARGS[@]}"
fi