Makefile

SHELL := /usr/bin/env bash -o pipefail

PROJECT := protobufs

# This controls the version of buf to install and use.
BUF_VERSION := 0.38.0

### Everything below this line is meant to be static, i.e. only adjust the above variables. ###

UNAME_OS := $(shell uname -s)
UNAME_ARCH := $(shell uname -m)

CACHE_BASE := $(HOME)/.cache/$(PROJECT)
CACHE := $(CACHE_BASE)/$(UNAME_OS)/$(UNAME_ARCH)
CACHE_BIN := $(CACHE)/bin
CACHE_VERSIONS := $(CACHE)/versions

# Update the $PATH so we can use buf directly
export PATH := $(abspath $(CACHE_BIN)):$(PATH)
# Update GOBIN to point to CACHE_BIN for source installations
export GOBIN := $(abspath $(CACHE_BIN))
# This is needed to allow versions to be added to Golang modules with go get
export GO111MODULE := on

# BUF points to the marker file for the installed version.
#
# If BUF_VERSION is changed, the binary will be re-downloaded.
BUF := $(CACHE_VERSIONS)/buf/$(BUF_VERSION)
$(BUF):
	@rm -f $(CACHE_BIN)/buf
	@mkdir -p $(CACHE_BIN)
	curl -sSL \
		"https://github.com/bufbuild/buf/releases/download/v$(BUF_VERSION)/buf-$(UNAME_OS)-$(UNAME_ARCH)" \
		-o "$(CACHE_BIN)/buf"
	chmod +x "$(CACHE_BIN)/buf"
	@rm -rf $(dir $(BUF))
	@mkdir -p $(dir $(BUF))
	@touch $(BUF)

.DEFAULT_GOAL := local

.PHONY: local
local: $(BUF)
	buf lint
	buf breaking --against '.git#branch=master'