Makefile for helm template + kustomize

Makefile

#!make
include .env

MAKEFLAGS += \
--warn-undefined-variables
SHELL = /usr/bin/env bash
.SHELLFLAGS := -O globstar -eu -o pipefail -c
.SUFFIXES:

# consistent sorting on OSX/nix
export LC_ALL = C

# override these with .env or command line args:
# make <ACTION> chart=<CHART> repo=<REPO> repo_url=<REPO_URL>
chart ?= example_chart
repo ?= example_repo
repo_url ?= https://example.io
# fetches and templates charts from helm
# @afirth 2021-01

name ?= $(notdir $(CURDIR))

# validate enables setting Capabilities.KubeVersion
helm_extra_args := --namespace=$(name) --validate

.PHONY: all
all: clean generate
	@printf "\nINFO: you may want to update the chart first!\n  make fetch\n"

.PHONY: generate
generate:
	helm template $(name) \
		generated/charts/$(chart) \
		--values values.yaml \
		$(helm_extra_args) \
		--output-dir ./generated
	true > generated/kustomization.yaml
	cd generated && ls -l && kustomize edit add resource $(chart)/**/*.yaml
	echo "#WARNING This file is generated by make, DO NOT EDIT" >> generated/kustomization.yaml

.PHONY: repo-add
repo-add:
	helm repo add $(repo) $(repo_url)

.PHONY: fetch
fetch:
	-rm -r generated/charts/$(chart)
	helm repo update
	helm fetch $(repo)/$(chart) --untardir generated/charts --untar

.PHONY: clean
clean:
	-rm -r generated/$(chart)/ generated/kustomization.yaml