Semantic Versioning in Make

Makefile

##! Commons

##@ Version
##~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
##: Dynamic Target (%)
##, [+N]=Increase version [ex: minor.+1]
##, [-N]=Decrease version [ex: minor.-1]
##~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

_f_version = $(PWD)/source/VERSION
_f_release = $(PWD)/source/RELEASE
_v_version = $(shell cat $(_f_version))
_v_version_major = $(shell echo $(_v_version) | cut -d. -f1)
_v_version_minor = $(shell echo $(_v_version) | cut -d. -f2)
_v_release = $(shell cat $(_f_release))

major.%: ## Adjust MAYOR value
	$(call __w_counter\
		,$$(( $(_v_version_major) $* )).$(_v_version_minor)\
		,$(_f_version))
minor.%: ## Adjust MINOR value
	$(call __w_counter\
		,$(_v_version_major).$$(( $(_v_version_minor) $* ))\
		,$(_f_version))
patch.%: ## Adjust PATCH value
	$(call __w_counter,$$(( $(_v_release) $* )),$(_f_release))

##-----------------------------------------------------------------------------
reset: ## Reset release counter [ex: v1.0 r0]
	$(call __w_counter,1.0,$(_f_version))
	$(call __w_counter,0,$(_f_release))
version: ## Show current version
	echo $(_v_version).$(_v_release)

define __w_counter
	echo -n $(1) >$(2)
endef

# --- help ----------------------------------------------------------------

_rst=\033[m
_prx=\033[38;5;

h: help
help:
	@command -p grep -Ehi '^(##.*)|(^[a-z0-9][a-z0-9\.%_-]+:.*?##\s.*)$$'\
		$(PWD)/Makefile\
		$(_include)\
		| awk 1>&2 '\
			BEGIN { FS = ":.*?## " }\
			/^##!/ {printf "\n\n$(_rst) $(_prx)208;7m %s \n", toupper(substr($$0,5))}\
			/^##@/ {printf "\n$(_rst)$(_prx)208m%s\n", substr($$0,4)}\
			/^##~/ {printf "$(_rst)$(_prx)159m%s\n", substr($$0,4)}\
			/^##-/ {printf "$(_rst)$(_prx)250m%s\n", substr($$0,4)}\
			/^##:/ {printf "$(_rst)$(_prx)159m%s:\n", substr($$0,4)}\
			/^##,/ {split(substr($$0, 4),x,"=");printf "$(_rst)$(_prx)195;3m  ~%s: %s\n", x[1], x[2];}\
			/^##;/ {split(substr($$0, 4),x,"=");printf "$(_rst)$(_prx)246;3m  -%-17s $(_prx)246m%s\n", x[1], x[2];}\
			/^##>/ {printf "$(_rst)%-21s$(_prx)246m%s\n", "", substr($$0,4);}\
			/^[a-zA-Z].*/ {printf "$(_rst)$(_prx)230m %-16s $(_prx)255m-- %s\n", $$1, $$2}\
		'; printf 1>&2 '\n$(_rst)'