Makefile

.PHONY: all
all: run

##@ General

# The help target prints out all targets with their descriptions organized
# beneath their categories. The categories are represented by '##@' and the
# target descriptions by '##'. The awk command is responsible for reading the
# entire set of makefiles included in this invocation, looking for lines of the
# file as xyz: ## something, and then pretty-format the target and help. Then,
# if there's a line with ##@ something, that gets pretty-printed as a category.
# More info on the usage of ANSI control characters for terminal formatting:
# https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters
# More info on the awk command:
# http://linuxcommand.org/lc3_adv_awk.php

.PHONY: help
help: ## Display this help.
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)

.PHONY: run
run: k6 # Run k6 using the local binary and pass it whatever arguments were passed to this make target
	PATH=$(LOCALBIN):$$PATH k6/run.sh $(RUN_ARGS)

##@ Dependencies

## Location to install dependencies to
LOCALBIN ?= $(shell pwd)/bin
$(LOCALBIN):
	mkdir -p $(LOCALBIN)

## Tool Binaries
KUBECTL ?= kubectl
K6 ?= $(LOCALBIN)/k6

## Tool Versions
K6_VERSION ?= v0.53.0

.PHONY: k6
k6: $(K6) ## Download k6 locally if necessary.
$(K6): $(LOCALBIN)
	@if [ ! -f $(K6) ]; then \
		curl -L -o $(K6).tar.gz https://github.com/grafana/k6/releases/download/$(K6_VERSION)/k6-$(K6_VERSION)-linux-amd64.tar.gz; \
		tar -xzf $(K6).tar.gz -C $(LOCALBIN) --strip-components 1; \
		rm $(K6).tar.gz; \
	fi

ifeq (run,$(firstword $(MAKECMDGOALS)))
  # use the rest as arguments for "run"
  RUN_ARGS := $(wordlist 2,$(words $(MAKECMDGOALS)),$(MAKECMDGOALS))
  # ...and turn them into do-nothing targets
  $(eval $(RUN_ARGS):;@:)
endif