version as argument, package and checksum

makefile

@@ -1,26 +1,42 @@
-prog :=releasecraftsman
+prog := releasecraftsman
+version ?= latest
 
 debug ?=
-
-$(info debug is $(debug))
-
 ifdef debug
   release :=
-  target :=debug
-  extension :=debug
+  target := debug
+  extension := debug
 else
-  release :=--release
-  target :=release
+  release := --release
+  target := release
   extension :=
 endif
 
+os := $(shell uname -s | tr '[:upper:]' '[:lower:]')
+
+# need to change this in future
+arch := x86_64
+
+tar_name := $(prog)-$(version)-$(arch)-$(os).tar.gz
+
+$(info debug is $(debug))
+$(info version is $(version))
+$(info OS is $(os))
+$(info Arch is $(arch))
+
 build:
 	cargo build $(release)
 
 install:
 	cp target/$(target)/$(prog) /usr/local/bin/
 
-all: build install
-
+package: build
+	cd target/$(target) && tar -czf $(tar_name) $(prog)
+
+checksum: package
+	shasum -a 256 target/$(target)/$(tar_name)
+
+all: build install package checksum
+
 help:
-	@echo "usage: make $(prog) [debug=1]"
+	@echo "usage: make $(prog) [debug=1] [version=x.y.z]"