Merge pull request #35 from layer5io/fitzergerald-patch-1

Create Makefile-show-help.mk

Author: fitzergerald

install/Makefile-show-help.mk

@@ -0,0 +1,5 @@
+.DEFAULT_GOAL := show-help
+# See <https://gist.github.com/klmr/575726c7e05d8780505a> for explanation.
+.PHONY: show-help
+show-help:
+	@echo "$$(tput bold)Please specify a build target. The choices are:$$(tput sgr0)";echo;sed -ne"/^## /{h;s/.*//;:d" -e"H;n;s/^## //;td" -e"s/:.*//;G;s/\\n## /---/;s/\\n/ /g;p;}" ${MAKEFILE_LIST}|LC_ALL='C' sort -f|awk -F --- -v n=$$(tput cols) -v i=19 -v a="$$(tput setaf 6)" -v z="$$(tput sgr0)" '{printf"%s%*s%s ",a,-i,$$1,z;m=split($$2,w," ");l=n-i;for(j=1;j<=m;j++){l-=length(w[j])+1;if(l<= 0){l=n-i-length(w[j])-1;printf"\n%*s ",-i," ";}printf"%s ",w[j];}printf"\n";}'|more $(shell test $(shell uname) == Darwin && echo '-Xr')