build: improve makefile and requirements documentation (#17)

Makefile

@@ -1,18 +1,48 @@
+ifneq (, $(shell which tput))
+	GREEN  := $(shell tput -Txterm setaf 2)
+	YELLOW := $(shell tput -Txterm setaf 3)
+	WHITE  := $(shell tput -Txterm setaf 7)
+	CYAN   := $(shell tput -Txterm setaf 6)
+	RESET  := $(shell tput -Txterm sgr0)
+endif
+
+# Git
+GIT_VERSION ?= $(shell git describe --abbrev=6 --always --tags)
+GIT_REMOTE_URL ?= $(shell git remote get-url origin | sed 's|git@github.com:|https://github.com/|')
+
+# Buf.build
+BUF=buf
+
+ifeq (, $(shell which $(BUF)))
+$(error "No buf command in $$PATH, see: https://buf.build/docs/installation/#install-the-buf-cli")
+endif
+
+
 .DEFAULT_GOAL := all
 
 all: lint breaking
 
+## Buf
 format:
-	@buf format -w
+	$(BUF) format -w
 
-lint:
-	@echo "Running buf lint"
-	@buf lint
+lint:  ## Run buf.build lint
+	$(BUF) lint
 
-breaking:
-	@echo "Running buf breaking changes checks"
-	@buf breaking --against="https://github.com/vacp2p/waku.git#branch=main"
+breaking:  ## Run buf.build breaking changes checks
+	$(BUF) breaking --against="${GIT_REMOTE_URL}#branch=main"
 
-build:
-	@echo "Running buf compilation"
-	@buf build
+build:  ## Run buf.build compilation
+	$(BUF) build
+
+## Help:
+help:	## Show this help
+	@echo ''
+	@echo 'Usage:'
+	@echo '  ${YELLOW}make${RESET} ${GREEN}<target>${RESET}'
+	@echo ''
+	@echo 'Targets:'
+	@awk 'BEGIN {FS = ":.*?## "} { \
+		if (/^[a-zA-Z_-]+:.*?##.*$$/) {printf "    ${YELLOW}%-20s${GREEN}%s${RESET}\n", $$1, $$2} \
+		else if (/^## .*$$/) {printf "  ${CYAN}%s${RESET}\n", substr($$1,4)} \
+		}' $(MAKEFILE_LIST)

README.md

@@ -7,9 +7,9 @@ capabilities to it.
 
 [Learn more about Waku](https://waku.org/)
 
-## Dependencies
+## Requirements
+
+- GNU Make
+- [Buf CLI](https://docs.buf.build/installation)
+- [Protobuf Compiler (protoc)](https://grpc.io/docs/protoc-installation/) (Optional)
 
-For mac:
-```console
-brew install bufbuild/buf/buf
-```