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Add a help target for any Makefile
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| URL=https://www.spinellis.gr/unix | |
| love: # Help: Create a file name love | |
| touch love | |
| money: # Help: Hit the jackpot | |
| yes $$ | fmt | head | |
| me a wizard: MOOC # Help: Become a Unix command-line wizard | |
| MOOC: | |
| @echo "Visit $(URL); Other than that ..." | |
| @(open $(URL) || cygstart $(URL) || kde-open $(URL) || gnome-open $(URL) || :) 2>/dev/null | |
| help: # Help: Show this help message | |
| @echo 'The following make targets are available.' | |
| @sed -n 's/^\([^:]*:\).*# [H]elp: \(.*\)/"%-20s %s\\n" "\1" "\2"/p' Makefile | xargs -n 3 printf | sort |
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