Makefile

.DEFAULT_GOAL := help

define PRINT_HELP_PYSCRIPT
import re, sys

output = []
for line in sys.stdin:
	match = re.match(r'^([a-zA-Z_-]+):.*?## (.*)$$', line)
	if match:
		target, help = match.groups()
		output.append("%-20s %s" % (target, help))
output.sort()
print('\n'.join(output))
endef
export PRINT_HELP_PYSCRIPT


help:  ## The command that generated this list
	@python -c "$$PRINT_HELP_PYSCRIPT" < $(MAKEFILE_LIST)