Makefile.head

#
# Because I never remember all the possible ways to twist things
#
# # Bookmarks of what helped crafting this Makefile:
# - https://github.com/Respect/Foundation/blob/6d136c03/Makefile
# - https://tech.davis-hansson.com/p/make/
#
# # Bookmarks of cool notes
#
# - https://github.com/xelalexv/dregsy/blob/b0615fda/Makefile
# - https://gist.github.com/evertrol/4b6fd05f3b6be2b331c60638b1af7101
# - https://github.com/xelalexv/dregsy/blob/b0615fda/Makefile
# - https://github.com/box/Makefile.test
# - https://makefiletutorial.com/
# - http://yszheda.github.io/wiki/makefile.html
#
# # Makefile so complex (and powerful) I wanna cry
#
# - https://github.com/Respect/Foundation/blob/6d136c03/Makefile
# - https://github.com/xelalexv/dregsy/blob/b0615fda/Makefile
#

VERSION        := 0.1.0
SHELL          := $(shell which bash)
.SHELLFLAGS     = -c
THIS            = $(word 1,$(MAKEFILE_LIST))
UNAME           = $(shell uname)
ENV             = $(shell command -v env)
GIT             = $(shell command -v git)
HAS_OPEN        = $(shell command -v open)
HAS_XDG         = $(shell command -v xdg)
HAS_SENSIBLE    = $(shell command -v sensible-browser)
BROWSER_ALTERNS = $(HAS_XDG) $(HAS_SENSIBLE) $(HAS_OPEN)
BROWSE          = $(word 1,$(BROWSER_ALTERNS))
DOTS            = $(shell printf '%0.1s' '.'{1..25})

# Macros
.CLEAR=\x1b[0m
.BOLD=\x1b[01m
.RED=\x1b[31;01m
.GREEN=\x1b[32;01m
.YELLOW=\x1b[33;01m
.ERROR="\ ""\ ""\ ""\ ">"\ "$(.RED)[ERROR]$(.CLEAR)
.OK="$(.GREEN)[OK]$(.CLEAR)"
.OKN="\ ""\ ""\ ""\ ">"\ "$(.GREEN)[OK]$(.CLEAR)
.WARN="\ ""\ ""\ ""\ ">"\ "$(.YELLOW)[WARNING]$(.CLEAR)

.ONESHELL: ;             # recipes execute in same shell
.NOTPARALLEL: ;          # wait for this target to finish
.EXPORT_ALL_VARIABLES: ; # send all vars to shell
default: help-default;   # default target
Makefile: ;              # skip prerequisite discovery


.title:
	@if [[ ! -n "$(notitle)" ]]; then \
		echo -e "    $(.BOLD)# Makefile helper: $(VERSION)$(.CLEAR)"; \
		echo ""; \
	fi; \

.menu-heading:
	@echo -e "    $(.BOLD)${title}$(.CLEAR)"
	@echo -e "    $$(printf '%0.1s' $$(seq -f'=%g' 1 $${#title}))\n"

.menu-item:
	printf "%-s%0.*s%s\n" "${tgt}:" $$((25 - $${#tgt})) $(DOTS) "${desc}"