Install golang from a makefile

Makefile

# ------------------------------------------------------------------------
# golang
# Install / update latest release
# ------------------------------------------------------------------------
# https://github.com/canha/golang-tools-install-script/blob/master/goinstall.sh

# TODO: assumes it uses /bin/bash 
# TODO: Make all downloads happens into a place for easy cleans


go-path  = /usr/local/go
go-libs  = /usr/local/share/go/
go-arch  = linux-amd64
go-url   = dl/.+$(go-arch)\.tar\.gz
# URL to the latest go version
go-dl    = $(shell curl -s -N https://go.dev/dl/ | grep -oE '$(go-url)' | head -n1)
go-latest= $(shell grep -ioE 'go[0-9.]+' <<< '$(go-dl)' | sed 's/\.$$//' )
go-local = $(shell go version | awk '{ print $$3; }')
go-file  = $(go-latest).$(go-arch).tar.gz

golang:
	@echo "Looking for latest go version..."

	@echo "path   $(go-path) "
	@echo "libs   $(go-libs) "
	@echo "arch   $(go-arch) "
	@echo "url    $(go-url) "
	@echo "dl     $(go-dl) "
	@echo "latest $(go-latest) "
	@echo "local  $(go-local) "
	@echo "file   $(go-file) "

	@if [ $(go-latest) == $(go-local) ] ; then \
	   echo "You already have installed the latest version."; \
	elif [ "$(go-latest)" > "$(go-local)" ]; then \
		 wget -c https://golang.org/$(go-dl); \
		 echo "Remove go directory if exists"; \
		 if [ -d $(go-path) ]; then \
				sudo rm -rf $(go-path); \
     fi; \
	   echo "Proceed to install"; \
		 if [ ! -d $(go-path) ]; then \
				sudo mkdir -p $(go-path); \
		 fi; \
	 	 if [ ! -d $(go-libs) ]; then \
				sudo mkdir -p $(go-libs); \
		 fi; \
		 sudo tar -C $(go-path) --strip-components=1 -xzf $(go-file); \
	fi

all: golang

# // TODO: clean downloads
clean:

.PHONY: all